module.exports = function(Chart) {
- Chart.Bar = function(context, config) {
- config.type = 'bar';
+ Chart.Bar = function(context, config) {
+ config.type = 'bar';
- return new Chart(context, config);
- };
+ return new Chart(context, config);
+ };
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- Chart.Bubble = function(context, config) {
- config.type = 'bubble';
- return new Chart(context, config);
- };
+ Chart.Bubble = function(context, config) {
+ config.type = 'bubble';
+ return new Chart(context, config);
+ };
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- Chart.Doughnut = function(context, config) {
- config.type = 'doughnut';
+ Chart.Doughnut = function(context, config) {
+ config.type = 'doughnut';
- return new Chart(context, config);
- };
+ return new Chart(context, config);
+ };
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- Chart.Line = function(context, config) {
- config.type = 'line';
+ Chart.Line = function(context, config) {
+ config.type = 'line';
- return new Chart(context, config);
- };
+ return new Chart(context, config);
+ };
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- Chart.PolarArea = function(context, config) {
- config.type = 'polarArea';
+ Chart.PolarArea = function(context, config) {
+ config.type = 'polarArea';
- return new Chart(context, config);
- };
+ return new Chart(context, config);
+ };
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
+ var helpers = Chart.helpers;
- var defaultConfig = {
- aspectRatio: 1,
- };
+ var defaultConfig = {
+ aspectRatio: 1
+ };
- Chart.Radar = function(context, config) {
- config.options = helpers.configMerge(defaultConfig, config.options);
- config.type = 'radar';
+ Chart.Radar = function(context, config) {
+ config.options = helpers.configMerge(defaultConfig, config.options);
+ config.type = 'radar';
- return new Chart(context, config);
- };
+ return new Chart(context, config);
+ };
};
module.exports = function(Chart) {
- var defaultConfig = {
- hover: {
- mode: 'single',
- },
-
- scales: {
- xAxes: [{
- type: "linear", // scatter should not use a category axis
- position: "bottom",
- id: "x-axis-1", // need an ID so datasets can reference the scale
- }],
- yAxes: [{
- type: "linear",
- position: "left",
- id: "y-axis-1",
- }],
- },
-
- tooltips: {
- callbacks: {
- title: function(tooltipItems, data) {
- // Title doesn't make sense for scatter since we format the data as a point
- return '';
- },
- label: function(tooltipItem, data) {
- return '(' + tooltipItem.xLabel + ', ' + tooltipItem.yLabel + ')';
- }
- }
- },
- };
-
- // Register the default config for this type
- Chart.defaults.scatter = defaultConfig;
-
- // Scatter charts use line controllers
- Chart.controllers.scatter = Chart.controllers.line;
-
- Chart.Scatter = function(context, config) {
- config.type = 'scatter';
- return new Chart(context, config);
- };
-
-};
+ var defaultConfig = {
+ hover: {
+ mode: 'single'
+ },
+
+ scales: {
+ xAxes: [{
+ type: "linear", // scatter should not use a category axis
+ position: "bottom",
+ id: "x-axis-1" // need an ID so datasets can reference the scale
+ }],
+ yAxes: [{
+ type: "linear",
+ position: "left",
+ id: "y-axis-1"
+ }]
+ },
+
+ tooltips: {
+ callbacks: {
+ title: function(tooltipItems, data) {
+ // Title doesn't make sense for scatter since we format the data as a point
+ return '';
+ },
+ label: function(tooltipItem, data) {
+ return '(' + tooltipItem.xLabel + ', ' + tooltipItem.yLabel + ')';
+ }
+ }
+ }
+ };
+
+ // Register the default config for this type
+ Chart.defaults.scatter = defaultConfig;
+
+ // Scatter charts use line controllers
+ Chart.controllers.scatter = Chart.controllers.line;
+
+ Chart.Scatter = function(context, config) {
+ config.type = 'scatter';
+ return new Chart(context, config);
+ };
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.bar = {
- hover: {
- mode: "label"
- },
-
- scales: {
- xAxes: [{
- type: "category",
-
- // Specific to Bar Controller
- categoryPercentage: 0.8,
- barPercentage: 0.9,
-
- // grid line settings
- gridLines: {
- offsetGridLines: true,
- },
- }],
- yAxes: [{
- type: "linear",
- }],
- },
- };
-
- Chart.controllers.bar = Chart.DatasetController.extend({
- initialize: function(chart, datasetIndex) {
- Chart.DatasetController.prototype.initialize.call(this, chart, datasetIndex);
-
- // Use this to indicate that this is a bar dataset.
- this.getDataset().bar = true;
- },
- // Get the number of datasets that display bars. We use this to correctly calculate the bar width
- getBarCount: function getBarCount() {
- var barCount = 0;
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (helpers.isDatasetVisible(dataset) && dataset.bar) {
- ++barCount;
- }
- });
- return barCount;
- },
-
- addElements: function() {
- this.getDataset().metaData = this.getDataset().metaData || [];
- helpers.each(this.getDataset().data, function(value, index) {
- this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Rectangle({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- });
- }, this);
- },
- addElementAndReset: function(index) {
- this.getDataset().metaData = this.getDataset().metaData || [];
- var rectangle = new Chart.elements.Rectangle({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- });
-
- var numBars = this.getBarCount();
-
- this.updateElement(rectangle, index, true, numBars);
- this.getDataset().metaData.splice(index, 0, rectangle);
- },
-
- update: function update(reset) {
- var numBars = this.getBarCount();
-
- helpers.each(this.getDataset().metaData, function(rectangle, index) {
- this.updateElement(rectangle, index, reset, numBars);
- }, this);
- },
-
- updateElement: function updateElement(rectangle, index, reset, numBars) {
-
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
-
- var yScalePoint;
-
- if (yScale.min < 0 && yScale.max < 0) {
- // all less than 0. use the top
- yScalePoint = yScale.getPixelForValue(yScale.max);
- } else if (yScale.min > 0 && yScale.max > 0) {
- yScalePoint = yScale.getPixelForValue(yScale.min);
- } else {
- yScalePoint = yScale.getPixelForValue(0);
- }
-
- helpers.extend(rectangle, {
- // Utility
- _chart: this.chart.chart,
- _xScale: xScale,
- _yScale: yScale,
- _datasetIndex: this.index,
- _index: index,
-
-
- // Desired view properties
- _model: {
- x: this.calculateBarX(index, this.index),
- y: reset ? yScalePoint : this.calculateBarY(index, this.index),
-
- // Tooltip
- label: this.chart.data.labels[index],
- datasetLabel: this.getDataset().label,
-
- // Appearance
- base: this.calculateBarBase(this.index, index),
- width: this.calculateBarWidth(numBars),
- backgroundColor: rectangle.custom && rectangle.custom.backgroundColor ? rectangle.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.rectangle.backgroundColor),
- borderColor: rectangle.custom && rectangle.custom.borderColor ? rectangle.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.rectangle.borderColor),
- borderWidth: rectangle.custom && rectangle.custom.borderWidth ? rectangle.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.rectangle.borderWidth),
- },
- });
- rectangle.pivot();
- },
-
- calculateBarBase: function(datasetIndex, index) {
-
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
-
- var base = 0;
-
- if (yScale.options.stacked) {
-
- var value = this.chart.data.datasets[datasetIndex].data[index];
-
- if (value < 0) {
- for (var i = 0; i < datasetIndex; i++) {
- var negDS = this.chart.data.datasets[i];
- if (helpers.isDatasetVisible(negDS) && negDS.yAxisID === yScale.id && negDS.bar) {
- base += negDS.data[index] < 0 ? negDS.data[index] : 0;
- }
- }
- } else {
- for (var j = 0; j < datasetIndex; j++) {
- var posDS = this.chart.data.datasets[j];
- if (helpers.isDatasetVisible(posDS) && posDS.yAxisID === yScale.id && posDS.bar) {
- base += posDS.data[index] > 0 ? posDS.data[index] : 0;
- }
- }
- }
-
- return yScale.getPixelForValue(base);
- }
-
- base = yScale.getPixelForValue(yScale.min);
-
- if (yScale.beginAtZero || ((yScale.min <= 0 && yScale.max >= 0) || (yScale.min >= 0 && yScale.max <= 0))) {
- base = yScale.getPixelForValue(0, 0);
- //base += yScale.options.gridLines.lineWidth;
- } else if (yScale.min < 0 && yScale.max < 0) {
- // All values are negative. Use the top as the base
- base = yScale.getPixelForValue(yScale.max);
- }
-
- return base;
-
- },
-
- getRuler: function() {
-
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
- var datasetCount = this.getBarCount();
-
- var tickWidth = (function() {
- var min = xScale.getPixelForTick(1) - xScale.getPixelForTick(0);
- for (var i = 2; i < this.getDataset().data.length; i++) {
- min = Math.min(xScale.getPixelForTick(i) - xScale.getPixelForTick(i - 1), min);
- }
- return min;
- }).call(this);
- var categoryWidth = tickWidth * xScale.options.categoryPercentage;
- var categorySpacing = (tickWidth - (tickWidth * xScale.options.categoryPercentage)) / 2;
- var fullBarWidth = categoryWidth / datasetCount;
- var barWidth = fullBarWidth * xScale.options.barPercentage;
- var barSpacing = fullBarWidth - (fullBarWidth * xScale.options.barPercentage);
-
- return {
- datasetCount: datasetCount,
- tickWidth: tickWidth,
- categoryWidth: categoryWidth,
- categorySpacing: categorySpacing,
- fullBarWidth: fullBarWidth,
- barWidth: barWidth,
- barSpacing: barSpacing,
- };
- },
-
- calculateBarWidth: function() {
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var ruler = this.getRuler();
- return xScale.options.stacked ? ruler.categoryWidth : ruler.barWidth;
- },
-
- // Get bar index from the given dataset index accounting for the fact that not all bars are visible
- getBarIndex: function(datasetIndex) {
- var barIndex = 0;
-
- for (var j = 0; j < datasetIndex; ++j) {
- if (helpers.isDatasetVisible(this.chart.data.datasets[j]) && this.chart.data.datasets[j].bar) {
- ++barIndex;
- }
- }
-
- return barIndex;
- },
-
- calculateBarX: function(index, datasetIndex) {
-
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var barIndex = this.getBarIndex(datasetIndex);
-
- var ruler = this.getRuler();
- var leftTick = xScale.getPixelForValue(null, index, datasetIndex, this.chart.isCombo);
- leftTick -= this.chart.isCombo ? (ruler.tickWidth / 2) : 0;
-
- if (xScale.options.stacked) {
- return leftTick + (ruler.categoryWidth / 2) + ruler.categorySpacing;
- }
-
- return leftTick +
- (ruler.barWidth / 2) +
- ruler.categorySpacing +
- (ruler.barWidth * barIndex) +
- (ruler.barSpacing / 2) +
- (ruler.barSpacing * barIndex);
- },
-
- calculateBarY: function(index, datasetIndex) {
-
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
-
- var value = this.getDataset().data[index];
-
- if (yScale.options.stacked) {
-
- var sumPos = 0,
- sumNeg = 0;
-
- for (var i = 0; i < datasetIndex; i++) {
- var ds = this.chart.data.datasets[i];
- if (helpers.isDatasetVisible(ds) && ds.bar && ds.yAxisID === yScale.id) {
- if (ds.data[index] < 0) {
- sumNeg += ds.data[index] || 0;
- } else {
- sumPos += ds.data[index] || 0;
- }
- }
- }
-
- if (value < 0) {
- return yScale.getPixelForValue(sumNeg + value);
- } else {
- return yScale.getPixelForValue(sumPos + value);
- }
-
- return yScale.getPixelForValue(value);
- }
-
- return yScale.getPixelForValue(value);
- },
-
- draw: function(ease) {
- var easingDecimal = ease || 1;
- helpers.each(this.getDataset().metaData, function(rectangle, index) {
- var d = this.getDataset().data[index];
- if (d !== null && d !== undefined && !isNaN(d)) {
- rectangle.transition(easingDecimal).draw();
- }
- }, this);
- },
-
- setHoverStyle: function(rectangle) {
- var dataset = this.chart.data.datasets[rectangle._datasetIndex];
- var index = rectangle._index;
-
- rectangle._model.backgroundColor = rectangle.custom && rectangle.custom.hoverBackgroundColor ? rectangle.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, helpers.color(rectangle._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
- rectangle._model.borderColor = rectangle.custom && rectangle.custom.hoverBorderColor ? rectangle.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.hoverBorderColor, index, helpers.color(rectangle._model.borderColor).saturate(0.5).darken(0.1).rgbString());
- rectangle._model.borderWidth = rectangle.custom && rectangle.custom.hoverBorderWidth ? rectangle.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.hoverBorderWidth, index, rectangle._model.borderWidth);
- },
-
- removeHoverStyle: function(rectangle) {
- var dataset = this.chart.data.datasets[rectangle._datasetIndex];
- var index = rectangle._index;
-
- rectangle._model.backgroundColor = rectangle.custom && rectangle.custom.backgroundColor ? rectangle.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.rectangle.backgroundColor);
- rectangle._model.borderColor = rectangle.custom && rectangle.custom.borderColor ? rectangle.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.rectangle.borderColor);
- rectangle._model.borderWidth = rectangle.custom && rectangle.custom.borderWidth ? rectangle.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.rectangle.borderWidth);
- }
-
- });
+ var helpers = Chart.helpers;
+
+ Chart.defaults.bar = {
+ hover: {
+ mode: "label"
+ },
+
+ scales: {
+ xAxes: [{
+ type: "category",
+
+ // Specific to Bar Controller
+ categoryPercentage: 0.8,
+ barPercentage: 0.9,
+
+ // grid line settings
+ gridLines: {
+ offsetGridLines: true
+ }
+ }],
+ yAxes: [{
+ type: "linear"
+ }]
+ }
+ };
+
+ Chart.controllers.bar = Chart.DatasetController.extend({
+ initialize: function(chart, datasetIndex) {
+ Chart.DatasetController.prototype.initialize.call(this, chart, datasetIndex);
+
+ // Use this to indicate that this is a bar dataset.
+ this.getDataset().bar = true;
+ },
+ // Get the number of datasets that display bars. We use this to correctly calculate the bar width
+ getBarCount: function getBarCount() {
+ var barCount = 0;
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (helpers.isDatasetVisible(dataset) && dataset.bar) {
+ ++barCount;
+ }
+ });
+ return barCount;
+ },
+
+ addElements: function() {
+ this.getDataset().metaData = this.getDataset().metaData || [];
+ helpers.each(this.getDataset().data, function(value, index) {
+ this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Rectangle({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index
+ });
+ }, this);
+ },
+ addElementAndReset: function(index) {
+ this.getDataset().metaData = this.getDataset().metaData || [];
+ var rectangle = new Chart.elements.Rectangle({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index
+ });
+
+ var numBars = this.getBarCount();
+
+ this.updateElement(rectangle, index, true, numBars);
+ this.getDataset().metaData.splice(index, 0, rectangle);
+ },
+
+ update: function update(reset) {
+ var numBars = this.getBarCount();
+
+ helpers.each(this.getDataset().metaData, function(rectangle, index) {
+ this.updateElement(rectangle, index, reset, numBars);
+ }, this);
+ },
+
+ updateElement: function updateElement(rectangle, index, reset, numBars) {
+
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+
+ var yScalePoint;
+
+ if (yScale.min < 0 && yScale.max < 0) {
+ // all less than 0. use the top
+ yScalePoint = yScale.getPixelForValue(yScale.max);
+ } else if (yScale.min > 0 && yScale.max > 0) {
+ yScalePoint = yScale.getPixelForValue(yScale.min);
+ } else {
+ yScalePoint = yScale.getPixelForValue(0);
+ }
+
+ helpers.extend(rectangle, {
+ // Utility
+ _chart: this.chart.chart,
+ _xScale: xScale,
+ _yScale: yScale,
+ _datasetIndex: this.index,
+ _index: index,
+
+
+ // Desired view properties
+ _model: {
+ x: this.calculateBarX(index, this.index),
+ y: reset ? yScalePoint : this.calculateBarY(index, this.index),
+
+ // Tooltip
+ label: this.chart.data.labels[index],
+ datasetLabel: this.getDataset().label,
+
+ // Appearance
+ base: this.calculateBarBase(this.index, index),
+ width: this.calculateBarWidth(numBars),
+ backgroundColor: rectangle.custom && rectangle.custom.backgroundColor ? rectangle.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.rectangle.backgroundColor),
+ borderColor: rectangle.custom && rectangle.custom.borderColor ? rectangle.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.rectangle.borderColor),
+ borderWidth: rectangle.custom && rectangle.custom.borderWidth ? rectangle.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.rectangle.borderWidth)
+ }
+ });
+ rectangle.pivot();
+ },
+
+ calculateBarBase: function(datasetIndex, index) {
+
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+
+ var base = 0;
+
+ if (yScale.options.stacked) {
+
+ var value = this.chart.data.datasets[datasetIndex].data[index];
+
+ if (value < 0) {
+ for (var i = 0; i < datasetIndex; i++) {
+ var negDS = this.chart.data.datasets[i];
+ if (helpers.isDatasetVisible(negDS) && negDS.yAxisID === yScale.id && negDS.bar) {
+ base += negDS.data[index] < 0 ? negDS.data[index] : 0;
+ }
+ }
+ } else {
+ for (var j = 0; j < datasetIndex; j++) {
+ var posDS = this.chart.data.datasets[j];
+ if (helpers.isDatasetVisible(posDS) && posDS.yAxisID === yScale.id && posDS.bar) {
+ base += posDS.data[index] > 0 ? posDS.data[index] : 0;
+ }
+ }
+ }
+
+ return yScale.getPixelForValue(base);
+ }
+
+ base = yScale.getPixelForValue(yScale.min);
+
+ if (yScale.beginAtZero || ((yScale.min <= 0 && yScale.max >= 0) || (yScale.min >= 0 && yScale.max <= 0))) {
+ base = yScale.getPixelForValue(0, 0);
+ //base += yScale.options.gridLines.lineWidth;
+ } else if (yScale.min < 0 && yScale.max < 0) {
+ // All values are negative. Use the top as the base
+ base = yScale.getPixelForValue(yScale.max);
+ }
+
+ return base;
+
+ },
+
+ getRuler: function() {
+
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+ var datasetCount = this.getBarCount();
+
+ var tickWidth = (function() {
+ var min = xScale.getPixelForTick(1) - xScale.getPixelForTick(0);
+ for (var i = 2; i < this.getDataset().data.length; i++) {
+ min = Math.min(xScale.getPixelForTick(i) - xScale.getPixelForTick(i - 1), min);
+ }
+ return min;
+ }).call(this);
+ var categoryWidth = tickWidth * xScale.options.categoryPercentage;
+ var categorySpacing = (tickWidth - (tickWidth * xScale.options.categoryPercentage)) / 2;
+ var fullBarWidth = categoryWidth / datasetCount;
+ var barWidth = fullBarWidth * xScale.options.barPercentage;
+ var barSpacing = fullBarWidth - (fullBarWidth * xScale.options.barPercentage);
+
+ return {
+ datasetCount: datasetCount,
+ tickWidth: tickWidth,
+ categoryWidth: categoryWidth,
+ categorySpacing: categorySpacing,
+ fullBarWidth: fullBarWidth,
+ barWidth: barWidth,
+ barSpacing: barSpacing
+ };
+ },
+
+ calculateBarWidth: function() {
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var ruler = this.getRuler();
+ return xScale.options.stacked ? ruler.categoryWidth : ruler.barWidth;
+ },
+
+ // Get bar index from the given dataset index accounting for the fact that not all bars are visible
+ getBarIndex: function(datasetIndex) {
+ var barIndex = 0;
+
+ for (var j = 0; j < datasetIndex; ++j) {
+ if (helpers.isDatasetVisible(this.chart.data.datasets[j]) && this.chart.data.datasets[j].bar) {
+ ++barIndex;
+ }
+ }
+
+ return barIndex;
+ },
+
+ calculateBarX: function(index, datasetIndex) {
+
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var barIndex = this.getBarIndex(datasetIndex);
+
+ var ruler = this.getRuler();
+ var leftTick = xScale.getPixelForValue(null, index, datasetIndex, this.chart.isCombo);
+ leftTick -= this.chart.isCombo ? (ruler.tickWidth / 2) : 0;
+
+ if (xScale.options.stacked) {
+ return leftTick + (ruler.categoryWidth / 2) + ruler.categorySpacing;
+ }
+
+ return leftTick +
+ (ruler.barWidth / 2) +
+ ruler.categorySpacing +
+ (ruler.barWidth * barIndex) +
+ (ruler.barSpacing / 2) +
+ (ruler.barSpacing * barIndex);
+ },
+
+ calculateBarY: function(index, datasetIndex) {
+
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+
+ var value = this.getDataset().data[index];
+
+ if (yScale.options.stacked) {
+
+ var sumPos = 0,
+ sumNeg = 0;
+
+ for (var i = 0; i < datasetIndex; i++) {
+ var ds = this.chart.data.datasets[i];
+ if (helpers.isDatasetVisible(ds) && ds.bar && ds.yAxisID === yScale.id) {
+ if (ds.data[index] < 0) {
+ sumNeg += ds.data[index] || 0;
+ } else {
+ sumPos += ds.data[index] || 0;
+ }
+ }
+ }
+
+ if (value < 0) {
+ return yScale.getPixelForValue(sumNeg + value);
+ } else {
+ return yScale.getPixelForValue(sumPos + value);
+ }
+
+ return yScale.getPixelForValue(value);
+ }
+
+ return yScale.getPixelForValue(value);
+ },
+
+ draw: function(ease) {
+ var easingDecimal = ease || 1;
+ helpers.each(this.getDataset().metaData, function(rectangle, index) {
+ var d = this.getDataset().data[index];
+ if (d !== null && d !== undefined && !isNaN(d)) {
+ rectangle.transition(easingDecimal).draw();
+ }
+ }, this);
+ },
+
+ setHoverStyle: function(rectangle) {
+ var dataset = this.chart.data.datasets[rectangle._datasetIndex];
+ var index = rectangle._index;
+
+ rectangle._model.backgroundColor = rectangle.custom && rectangle.custom.hoverBackgroundColor ? rectangle.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, helpers.color(rectangle._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
+ rectangle._model.borderColor = rectangle.custom && rectangle.custom.hoverBorderColor ? rectangle.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.hoverBorderColor, index, helpers.color(rectangle._model.borderColor).saturate(0.5).darken(0.1).rgbString());
+ rectangle._model.borderWidth = rectangle.custom && rectangle.custom.hoverBorderWidth ? rectangle.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.hoverBorderWidth, index, rectangle._model.borderWidth);
+ },
+
+ removeHoverStyle: function(rectangle) {
+ var dataset = this.chart.data.datasets[rectangle._datasetIndex];
+ var index = rectangle._index;
+
+ rectangle._model.backgroundColor = rectangle.custom && rectangle.custom.backgroundColor ? rectangle.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.rectangle.backgroundColor);
+ rectangle._model.borderColor = rectangle.custom && rectangle.custom.borderColor ? rectangle.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.rectangle.borderColor);
+ rectangle._model.borderWidth = rectangle.custom && rectangle.custom.borderWidth ? rectangle.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.rectangle.borderWidth);
+ }
+
+ });
};
xAxes: [{
type: "linear", // bubble should probably use a linear scale by default
position: "bottom",
- id: "x-axis-0", // need an ID so datasets can reference the scale
+ id: "x-axis-0" // need an ID so datasets can reference the scale
}],
yAxes: [{
type: "linear",
position: "left",
- id: "y-axis-0",
- }],
+ id: "y-axis-0"
+ }]
},
tooltips: {
return datasetLabel + ': (' + dataPoint.x + ', ' + dataPoint.y + ', ' + dataPoint.r + ')';
}
}
- },
+ }
};
this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
}, this);
},
var point = new Chart.elements.Point({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
// Reset the point
borderWidth: point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.point.borderWidth),
// Tooltip
- hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius),
- },
+ hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius)
+ }
});
point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
point._model.borderWidth = point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.point.borderWidth);
}
});
-};
+};
\ No newline at end of file
//Boolean - Whether we animate the rotation of the Doughnut
animateRotate: true,
//Boolean - Whether we animate scaling the Doughnut from the centre
- animateScale: false,
+ animateScale: false
},
aspectRatio: 1,
hover: {
// Need to override these to give a nice default
tooltips: {
callbacks: {
- title: function() { return '';},
+ title: function() {
+ return '';
+ },
label: function(tooltipItem, data) {
return data.labels[tooltipItem.index] + ': ' + data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
}
this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Arc({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
}, this);
},
var arc = new Chart.elements.Arc({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
if (colorForNewElement && helpers.isArray(this.getDataset().backgroundColor)) {
},
getVisibleDatasetCount: function getVisibleDatasetCount() {
- return helpers.where(this.chart.data.datasets, function(ds) { return helpers.isDatasetVisible(ds); }).length;
+ return helpers.where(this.chart.data.datasets, function(ds) {
+ return helpers.isDatasetVisible(ds);
+ }).length;
},
// Get index of the dataset in relation to the visible datasets. This allows determining the inner and outer radius correctly
borderColor: arc.custom && arc.custom.borderColor ? arc.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.arc.borderColor),
label: helpers.getValueAtIndexOrDefault(this.getDataset().label, index, this.chart.data.labels[index])
- },
+ }
});
if (!reset) {
} else {
return 0;
}
- },
-
+ }
});
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.line = {
- showLines: true,
-
- hover: {
- mode: "label"
- },
-
- scales: {
- xAxes: [{
- type: "category",
- id: 'x-axis-0'
- }],
- yAxes: [{
- type: "linear",
- id: 'y-axis-0'
- }],
- },
- };
-
-
- Chart.controllers.line = Chart.DatasetController.extend({
- addElements: function() {
-
- this.getDataset().metaData = this.getDataset().metaData || [];
-
- this.getDataset().metaDataset = this.getDataset().metaDataset || new Chart.elements.Line({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _points: this.getDataset().metaData,
- });
-
- helpers.each(this.getDataset().data, function(value, index) {
- this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- });
- }, this);
- },
- addElementAndReset: function(index) {
- this.getDataset().metaData = this.getDataset().metaData || [];
- var point = new Chart.elements.Point({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- });
-
- // Reset the point
- this.updateElement(point, index, true);
-
- // Add to the points array
- this.getDataset().metaData.splice(index, 0, point);
-
- // Make sure bezier control points are updated
- if (this.chart.options.showLines && this.chart.options.elements.line.tension !== 0)
- this.updateBezierControlPoints();
- },
-
- update: function update(reset) {
- var line = this.getDataset().metaDataset;
- var points = this.getDataset().metaData;
-
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var scaleBase;
-
- if (yScale.min < 0 && yScale.max < 0) {
- scaleBase = yScale.getPixelForValue(yScale.max);
- } else if (yScale.min > 0 && yScale.max > 0) {
- scaleBase = yScale.getPixelForValue(yScale.min);
- } else {
- scaleBase = yScale.getPixelForValue(0);
- }
-
- // Update Line
- if (this.chart.options.showLines) {
- // Utility
- line._scale = yScale;
- line._datasetIndex = this.index;
- // Data
- line._children = points;
- // Model
- line._model = {
- // Appearance
- tension: line.custom && line.custom.tension ? line.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
- backgroundColor: line.custom && line.custom.backgroundColor ? line.custom.backgroundColor : (this.getDataset().backgroundColor || this.chart.options.elements.line.backgroundColor),
- borderWidth: line.custom && line.custom.borderWidth ? line.custom.borderWidth : (this.getDataset().borderWidth || this.chart.options.elements.line.borderWidth),
- borderColor: line.custom && line.custom.borderColor ? line.custom.borderColor : (this.getDataset().borderColor || this.chart.options.elements.line.borderColor),
- borderCapStyle: line.custom && line.custom.borderCapStyle ? line.custom.borderCapStyle : (this.getDataset().borderCapStyle || this.chart.options.elements.line.borderCapStyle),
- borderDash: line.custom && line.custom.borderDash ? line.custom.borderDash : (this.getDataset().borderDash || this.chart.options.elements.line.borderDash),
- borderDashOffset: line.custom && line.custom.borderDashOffset ? line.custom.borderDashOffset : (this.getDataset().borderDashOffset || this.chart.options.elements.line.borderDashOffset),
- borderJoinStyle: line.custom && line.custom.borderJoinStyle ? line.custom.borderJoinStyle : (this.getDataset().borderJoinStyle || this.chart.options.elements.line.borderJoinStyle),
- fill: line.custom && line.custom.fill ? line.custom.fill : (this.getDataset().fill !== undefined ? this.getDataset().fill : this.chart.options.elements.line.fill),
- // Scale
- scaleTop: yScale.top,
- scaleBottom: yScale.bottom,
- scaleZero: scaleBase
- };
- line.pivot();
- }
-
- // Update Points
- helpers.each(points, function(point, index) {
- this.updateElement(point, index, reset);
- }, this);
-
- if (this.chart.options.showLines && this.chart.options.elements.line.tension !== 0)
- this.updateBezierControlPoints();
- },
-
- getPointBackgroundColor: function(point, index) {
- var backgroundColor = this.chart.options.elements.point.backgroundColor;
- var dataset = this.getDataset();
-
- if (point.custom && point.custom.backgroundColor) {
- backgroundColor = point.custom.backgroundColor;
- } else if (dataset.pointBackgroundColor) {
- backgroundColor = helpers.getValueAtIndexOrDefault(dataset.pointBackgroundColor, index, backgroundColor);
- } else if (dataset.backgroundColor) {
- backgroundColor = dataset.backgroundColor;
- }
-
- return backgroundColor;
- },
- getPointBorderColor: function(point, index) {
- var borderColor = this.chart.options.elements.point.borderColor;
- var dataset = this.getDataset();
-
- if (point.custom && point.custom.borderColor) {
- borderColor = point.custom.borderColor;
- } else if (dataset.pointBorderColor) {
- borderColor = helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, borderColor);
- } else if (dataset.borderColor) {
- borderColor = dataset.borderColor;
- }
-
- return borderColor;
- },
- getPointBorderWidth: function(point, index) {
- var borderWidth = this.chart.options.elements.point.borderWidth;
- var dataset = this.getDataset();
-
- if (point.custom && point.custom.borderWidth !== undefined) {
- borderWidth = point.custom.borderWidth;
- } else if (dataset.pointBorderWidth !== undefined) {
- borderWidth = helpers.getValueAtIndexOrDefault(dataset.pointBorderWidth, index, borderWidth);
- } else if (dataset.borderWidth !== undefined) {
- borderWidth = dataset.borderWidth;
- }
-
- return borderWidth;
- },
-
- updateElement: function(point, index, reset) {
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var scaleBase;
-
- if (yScale.min < 0 && yScale.max < 0) {
- scaleBase = yScale.getPixelForValue(yScale.max);
- } else if (yScale.min > 0 && yScale.max > 0) {
- scaleBase = yScale.getPixelForValue(yScale.min);
- } else {
- scaleBase = yScale.getPixelForValue(0);
- }
-
- // Utility
- point._chart = this.chart.chart;
- point._xScale = xScale;
- point._yScale = yScale;
- point._datasetIndex = this.index;
- point._index = index;
-
- // Desired view properties
- point._model = {
- x: xScale.getPixelForValue(this.getDataset().data[index], index, this.index, this.chart.isCombo),
- y: reset ? scaleBase : this.calculatePointY(this.getDataset().data[index], index, this.index, this.chart.isCombo),
- // Appearance
- tension: point.custom && point.custom.tension ? point.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
- radius: point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius),
- pointStyle: point.custom && point.custom.pointStyle ? point.custom.pointStyle : helpers.getValueAtIndexOrDefault(this.getDataset().pointStyle, index, this.chart.options.elements.point.pointStyle),
- backgroundColor: this.getPointBackgroundColor(point, index),
- borderColor: this.getPointBorderColor(point, index),
- borderWidth: this.getPointBorderWidth(point, index),
- // Tooltip
- hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius)
- };
-
- point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
- },
-
- calculatePointY: function(value, index, datasetIndex, isCombo) {
-
- var xScale = this.getScaleForId(this.getDataset().xAxisID);
- var yScale = this.getScaleForId(this.getDataset().yAxisID);
-
- if (yScale.options.stacked) {
-
- var sumPos = 0,
- sumNeg = 0;
-
- for (var i = this.chart.data.datasets.length - 1; i > datasetIndex; i--) {
- var ds = this.chart.data.datasets[i];
- if (ds.type === 'line' && helpers.isDatasetVisible(ds)) {
- if (ds.data[index] < 0) {
- sumNeg += ds.data[index] || 0;
- } else {
- sumPos += ds.data[index] || 0;
- }
- }
- }
-
- if (value < 0) {
- return yScale.getPixelForValue(sumNeg + value);
- } else {
- return yScale.getPixelForValue(sumPos + value);
- }
- }
-
- return yScale.getPixelForValue(value);
- },
-
- updateBezierControlPoints: function() {
- // Update bezier control points
- helpers.each(this.getDataset().metaData, function(point, index) {
- var controlPoints = helpers.splineCurve(
- helpers.previousItem(this.getDataset().metaData, index)._model,
- point._model,
- helpers.nextItem(this.getDataset().metaData, index)._model,
- point._model.tension
- );
-
- // Prevent the bezier going outside of the bounds of the graph
- point._model.controlPointPreviousX = Math.max(Math.min(controlPoints.previous.x, this.chart.chartArea.right), this.chart.chartArea.left);
- point._model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
-
- point._model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, this.chart.chartArea.right), this.chart.chartArea.left);
- point._model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
-
- // Now pivot the point for animation
- point.pivot();
- }, this);
- },
-
- draw: function(ease) {
- var easingDecimal = ease || 1;
-
- // Transition Point Locations
- helpers.each(this.getDataset().metaData, function(point) {
- point.transition(easingDecimal);
- });
-
- // Transition and Draw the line
- if (this.chart.options.showLines)
- this.getDataset().metaDataset.transition(easingDecimal).draw();
-
- // Draw the points
- helpers.each(this.getDataset().metaData, function(point) {
- point.draw();
- });
- },
-
- setHoverStyle: function(point) {
- // Point
- var dataset = this.chart.data.datasets[point._datasetIndex];
- var index = point._index;
-
- point._model.radius = point.custom && point.custom.hoverRadius ? point.custom.hoverRadius : helpers.getValueAtIndexOrDefault(dataset.pointHoverRadius, index, this.chart.options.elements.point.hoverRadius);
- point._model.backgroundColor = point.custom && point.custom.hoverBackgroundColor ? point.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBackgroundColor, index, helpers.color(point._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
- point._model.borderColor = point.custom && point.custom.hoverBorderColor ? point.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderColor, index, helpers.color(point._model.borderColor).saturate(0.5).darken(0.1).rgbString());
- point._model.borderWidth = point.custom && point.custom.hoverBorderWidth ? point.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderWidth, index, point._model.borderWidth);
- },
-
- removeHoverStyle: function(point) {
- var dataset = this.chart.data.datasets[point._datasetIndex];
- var index = point._index;
-
- point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius);
- point._model.backgroundColor = this.getPointBackgroundColor(point, index);
- point._model.borderColor = this.getPointBorderColor(point, index);
- point._model.borderWidth = this.getPointBorderWidth(point, index);
- }
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.line = {
+ showLines: true,
+
+ hover: {
+ mode: "label"
+ },
+
+ scales: {
+ xAxes: [{
+ type: "category",
+ id: 'x-axis-0'
+ }],
+ yAxes: [{
+ type: "linear",
+ id: 'y-axis-0'
+ }]
+ }
+ };
+
+
+ Chart.controllers.line = Chart.DatasetController.extend({
+ addElements: function() {
+
+ this.getDataset().metaData = this.getDataset().metaData || [];
+
+ this.getDataset().metaDataset = this.getDataset().metaDataset || new Chart.elements.Line({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _points: this.getDataset().metaData
+ });
+
+ helpers.each(this.getDataset().data, function(value, index) {
+ this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index
+ });
+ }, this);
+ },
+ addElementAndReset: function(index) {
+ this.getDataset().metaData = this.getDataset().metaData || [];
+ var point = new Chart.elements.Point({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index
+ });
+
+ // Reset the point
+ this.updateElement(point, index, true);
+
+ // Add to the points array
+ this.getDataset().metaData.splice(index, 0, point);
+
+ // Make sure bezier control points are updated
+ if (this.chart.options.showLines && this.chart.options.elements.line.tension !== 0)
+ this.updateBezierControlPoints();
+ },
+
+ update: function update(reset) {
+ var line = this.getDataset().metaDataset;
+ var points = this.getDataset().metaData;
+
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var scaleBase;
+
+ if (yScale.min < 0 && yScale.max < 0) {
+ scaleBase = yScale.getPixelForValue(yScale.max);
+ } else if (yScale.min > 0 && yScale.max > 0) {
+ scaleBase = yScale.getPixelForValue(yScale.min);
+ } else {
+ scaleBase = yScale.getPixelForValue(0);
+ }
+
+ // Update Line
+ if (this.chart.options.showLines) {
+ // Utility
+ line._scale = yScale;
+ line._datasetIndex = this.index;
+ // Data
+ line._children = points;
+ // Model
+ line._model = {
+ // Appearance
+ tension: line.custom && line.custom.tension ? line.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
+ backgroundColor: line.custom && line.custom.backgroundColor ? line.custom.backgroundColor : (this.getDataset().backgroundColor || this.chart.options.elements.line.backgroundColor),
+ borderWidth: line.custom && line.custom.borderWidth ? line.custom.borderWidth : (this.getDataset().borderWidth || this.chart.options.elements.line.borderWidth),
+ borderColor: line.custom && line.custom.borderColor ? line.custom.borderColor : (this.getDataset().borderColor || this.chart.options.elements.line.borderColor),
+ borderCapStyle: line.custom && line.custom.borderCapStyle ? line.custom.borderCapStyle : (this.getDataset().borderCapStyle || this.chart.options.elements.line.borderCapStyle),
+ borderDash: line.custom && line.custom.borderDash ? line.custom.borderDash : (this.getDataset().borderDash || this.chart.options.elements.line.borderDash),
+ borderDashOffset: line.custom && line.custom.borderDashOffset ? line.custom.borderDashOffset : (this.getDataset().borderDashOffset || this.chart.options.elements.line.borderDashOffset),
+ borderJoinStyle: line.custom && line.custom.borderJoinStyle ? line.custom.borderJoinStyle : (this.getDataset().borderJoinStyle || this.chart.options.elements.line.borderJoinStyle),
+ fill: line.custom && line.custom.fill ? line.custom.fill : (this.getDataset().fill !== undefined ? this.getDataset().fill : this.chart.options.elements.line.fill),
+ // Scale
+ scaleTop: yScale.top,
+ scaleBottom: yScale.bottom,
+ scaleZero: scaleBase
+ };
+ line.pivot();
+ }
+
+ // Update Points
+ helpers.each(points, function(point, index) {
+ this.updateElement(point, index, reset);
+ }, this);
+
+ if (this.chart.options.showLines && this.chart.options.elements.line.tension !== 0)
+ this.updateBezierControlPoints();
+ },
+
+ getPointBackgroundColor: function(point, index) {
+ var backgroundColor = this.chart.options.elements.point.backgroundColor;
+ var dataset = this.getDataset();
+
+ if (point.custom && point.custom.backgroundColor) {
+ backgroundColor = point.custom.backgroundColor;
+ } else if (dataset.pointBackgroundColor) {
+ backgroundColor = helpers.getValueAtIndexOrDefault(dataset.pointBackgroundColor, index, backgroundColor);
+ } else if (dataset.backgroundColor) {
+ backgroundColor = dataset.backgroundColor;
+ }
+
+ return backgroundColor;
+ },
+ getPointBorderColor: function(point, index) {
+ var borderColor = this.chart.options.elements.point.borderColor;
+ var dataset = this.getDataset();
+
+ if (point.custom && point.custom.borderColor) {
+ borderColor = point.custom.borderColor;
+ } else if (dataset.pointBorderColor) {
+ borderColor = helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, borderColor);
+ } else if (dataset.borderColor) {
+ borderColor = dataset.borderColor;
+ }
+
+ return borderColor;
+ },
+ getPointBorderWidth: function(point, index) {
+ var borderWidth = this.chart.options.elements.point.borderWidth;
+ var dataset = this.getDataset();
+
+ if (point.custom && point.custom.borderWidth !== undefined) {
+ borderWidth = point.custom.borderWidth;
+ } else if (dataset.pointBorderWidth !== undefined) {
+ borderWidth = helpers.getValueAtIndexOrDefault(dataset.pointBorderWidth, index, borderWidth);
+ } else if (dataset.borderWidth !== undefined) {
+ borderWidth = dataset.borderWidth;
+ }
+
+ return borderWidth;
+ },
+
+ updateElement: function(point, index, reset) {
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var scaleBase;
+
+ if (yScale.min < 0 && yScale.max < 0) {
+ scaleBase = yScale.getPixelForValue(yScale.max);
+ } else if (yScale.min > 0 && yScale.max > 0) {
+ scaleBase = yScale.getPixelForValue(yScale.min);
+ } else {
+ scaleBase = yScale.getPixelForValue(0);
+ }
+
+ // Utility
+ point._chart = this.chart.chart;
+ point._xScale = xScale;
+ point._yScale = yScale;
+ point._datasetIndex = this.index;
+ point._index = index;
+
+ // Desired view properties
+ point._model = {
+ x: xScale.getPixelForValue(this.getDataset().data[index], index, this.index, this.chart.isCombo),
+ y: reset ? scaleBase : this.calculatePointY(this.getDataset().data[index], index, this.index, this.chart.isCombo),
+ // Appearance
+ tension: point.custom && point.custom.tension ? point.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
+ radius: point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius),
+ pointStyle: point.custom && point.custom.pointStyle ? point.custom.pointStyle : helpers.getValueAtIndexOrDefault(this.getDataset().pointStyle, index, this.chart.options.elements.point.pointStyle),
+ backgroundColor: this.getPointBackgroundColor(point, index),
+ borderColor: this.getPointBorderColor(point, index),
+ borderWidth: this.getPointBorderWidth(point, index),
+ // Tooltip
+ hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius)
+ };
+
+ point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
+ },
+
+ calculatePointY: function(value, index, datasetIndex, isCombo) {
+
+ var xScale = this.getScaleForId(this.getDataset().xAxisID);
+ var yScale = this.getScaleForId(this.getDataset().yAxisID);
+
+ if (yScale.options.stacked) {
+
+ var sumPos = 0,
+ sumNeg = 0;
+
+ for (var i = this.chart.data.datasets.length - 1; i > datasetIndex; i--) {
+ var ds = this.chart.data.datasets[i];
+ if (ds.type === 'line' && helpers.isDatasetVisible(ds)) {
+ if (ds.data[index] < 0) {
+ sumNeg += ds.data[index] || 0;
+ } else {
+ sumPos += ds.data[index] || 0;
+ }
+ }
+ }
+
+ if (value < 0) {
+ return yScale.getPixelForValue(sumNeg + value);
+ } else {
+ return yScale.getPixelForValue(sumPos + value);
+ }
+ }
+
+ return yScale.getPixelForValue(value);
+ },
+
+ updateBezierControlPoints: function() {
+ // Update bezier control points
+ helpers.each(this.getDataset().metaData, function(point, index) {
+ var controlPoints = helpers.splineCurve(
+ helpers.previousItem(this.getDataset().metaData, index)._model,
+ point._model,
+ helpers.nextItem(this.getDataset().metaData, index)._model,
+ point._model.tension
+ );
+
+ // Prevent the bezier going outside of the bounds of the graph
+ point._model.controlPointPreviousX = Math.max(Math.min(controlPoints.previous.x, this.chart.chartArea.right), this.chart.chartArea.left);
+ point._model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
+
+ point._model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, this.chart.chartArea.right), this.chart.chartArea.left);
+ point._model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
+
+ // Now pivot the point for animation
+ point.pivot();
+ }, this);
+ },
+
+ draw: function(ease) {
+ var easingDecimal = ease || 1;
+
+ // Transition Point Locations
+ helpers.each(this.getDataset().metaData, function(point) {
+ point.transition(easingDecimal);
+ });
+
+ // Transition and Draw the line
+ if (this.chart.options.showLines)
+ this.getDataset().metaDataset.transition(easingDecimal).draw();
+
+ // Draw the points
+ helpers.each(this.getDataset().metaData, function(point) {
+ point.draw();
+ });
+ },
+
+ setHoverStyle: function(point) {
+ // Point
+ var dataset = this.chart.data.datasets[point._datasetIndex];
+ var index = point._index;
+
+ point._model.radius = point.custom && point.custom.hoverRadius ? point.custom.hoverRadius : helpers.getValueAtIndexOrDefault(dataset.pointHoverRadius, index, this.chart.options.elements.point.hoverRadius);
+ point._model.backgroundColor = point.custom && point.custom.hoverBackgroundColor ? point.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBackgroundColor, index, helpers.color(point._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
+ point._model.borderColor = point.custom && point.custom.hoverBorderColor ? point.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderColor, index, helpers.color(point._model.borderColor).saturate(0.5).darken(0.1).rgbString());
+ point._model.borderWidth = point.custom && point.custom.hoverBorderWidth ? point.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderWidth, index, point._model.borderWidth);
+ },
+
+ removeHoverStyle: function(point) {
+ var dataset = this.chart.data.datasets[point._datasetIndex];
+ var index = point._index;
+
+ point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius);
+ point._model.backgroundColor = this.getPointBackgroundColor(point, index);
+ point._model.borderColor = this.getPointBorderColor(point, index);
+ point._model.borderWidth = this.getPointBorderWidth(point, index);
+ }
+ });
+};
\ No newline at end of file
scale: {
type: "radialLinear",
- lineArc: true, // so that lines are circular
+ lineArc: true // so that lines are circular
},
//Boolean - Whether to animate the rotation of the chart
// Need to override these to give a nice default
tooltips: {
callbacks: {
- title: function() { return ''; },
+ title: function() {
+ return '';
+ },
label: function(tooltipItem, data) {
return data.labels[tooltipItem.index] + ': ' + tooltipItem.yLabel;
}
this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Arc({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
}, this);
},
var arc = new Chart.elements.Arc({
_chart: this.chart.chart,
_datasetIndex: this.index,
- _index: index,
+ _index: index
});
// Reset the point
this.getDataset().metaData.splice(index, 0, arc);
},
getVisibleDatasetCount: function getVisibleDatasetCount() {
- return helpers.where(this.chart.data.datasets, function(ds) { return helpers.isDatasetVisible(ds); }).length;
+ return helpers.where(this.chart.data.datasets, function(ds) {
+ return helpers.isDatasetVisible(ds);
+ }).length;
},
update: function update(reset) {
borderColor: arc.custom && arc.custom.borderColor ? arc.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.arc.borderColor),
label: helpers.getValueAtIndexOrDefault(this.chart.data.labels, index, this.chart.data.labels[index])
- },
+ }
});
arc.pivot();
}
});
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
-
- Chart.defaults.radar = {
- scale: {
- type: "radialLinear",
- },
- elements: {
- line: {
- tension: 0, // no bezier in radar
- }
- },
- };
-
- Chart.controllers.radar = Chart.DatasetController.extend({
- linkScales: function() {
- // No need. Single scale only
- },
-
- addElements: function() {
-
- this.getDataset().metaData = this.getDataset().metaData || [];
-
- this.getDataset().metaDataset = this.getDataset().metaDataset || new Chart.elements.Line({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _points: this.getDataset().metaData,
- _loop: true
- });
-
- helpers.each(this.getDataset().data, function(value, index) {
- this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- _model: {
- x: 0, //xScale.getPixelForValue(null, index, true),
- y: 0, //this.chartArea.bottom,
- },
- });
- }, this);
- },
- addElementAndReset: function(index) {
- this.getDataset().metaData = this.getDataset().metaData || [];
- var point = new Chart.elements.Point({
- _chart: this.chart.chart,
- _datasetIndex: this.index,
- _index: index,
- });
-
- // Reset the point
- this.updateElement(point, index, true);
-
- // Add to the points array
- this.getDataset().metaData.splice(index, 0, point);
-
- // Make sure bezier control points are updated
- this.updateBezierControlPoints();
- },
-
- update: function update(reset) {
-
- var line = this.getDataset().metaDataset;
- var points = this.getDataset().metaData;
-
- var scale = this.chart.scale;
- var scaleBase;
-
- if (scale.min < 0 && scale.max < 0) {
- scaleBase = scale.getPointPositionForValue(0, scale.max);
- } else if (scale.min > 0 && scale.max > 0) {
- scaleBase = scale.getPointPositionForValue(0, scale.min);
- } else {
- scaleBase = scale.getPointPositionForValue(0, 0);
- }
-
- helpers.extend(this.getDataset().metaDataset, {
- // Utility
- _datasetIndex: this.index,
- // Data
- _children: this.getDataset().metaData,
- // Model
- _model: {
- // Appearance
- tension: line.custom && line.custom.tension ? line.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
- backgroundColor: line.custom && line.custom.backgroundColor ? line.custom.backgroundColor : (this.getDataset().backgroundColor || this.chart.options.elements.line.backgroundColor),
- borderWidth: line.custom && line.custom.borderWidth ? line.custom.borderWidth : (this.getDataset().borderWidth || this.chart.options.elements.line.borderWidth),
- borderColor: line.custom && line.custom.borderColor ? line.custom.borderColor : (this.getDataset().borderColor || this.chart.options.elements.line.borderColor),
- fill: line.custom && line.custom.fill ? line.custom.fill : (this.getDataset().fill !== undefined ? this.getDataset().fill : this.chart.options.elements.line.fill),
- borderCapStyle: line.custom && line.custom.borderCapStyle ? line.custom.borderCapStyle : (this.getDataset().borderCapStyle || this.chart.options.elements.line.borderCapStyle),
- borderDash: line.custom && line.custom.borderDash ? line.custom.borderDash : (this.getDataset().borderDash || this.chart.options.elements.line.borderDash),
- borderDashOffset: line.custom && line.custom.borderDashOffset ? line.custom.borderDashOffset : (this.getDataset().borderDashOffset || this.chart.options.elements.line.borderDashOffset),
- borderJoinStyle: line.custom && line.custom.borderJoinStyle ? line.custom.borderJoinStyle : (this.getDataset().borderJoinStyle || this.chart.options.elements.line.borderJoinStyle),
-
- // Scale
- scaleTop: scale.top,
- scaleBottom: scale.bottom,
- scaleZero: scaleBase,
- },
- });
-
- this.getDataset().metaDataset.pivot();
-
- // Update Points
- helpers.each(points, function(point, index) {
- this.updateElement(point, index, reset);
- }, this);
-
-
- // Update bezier control points
- this.updateBezierControlPoints();
- },
- updateElement: function(point, index, reset) {
- var pointPosition = this.chart.scale.getPointPositionForValue(index, this.getDataset().data[index]);
-
- helpers.extend(point, {
- // Utility
- _datasetIndex: this.index,
- _index: index,
- _scale: this.chart.scale,
-
- // Desired view properties
- _model: {
- x: reset ? this.chart.scale.xCenter : pointPosition.x, // value not used in dataset scale, but we want a consistent API between scales
- y: reset ? this.chart.scale.yCenter : pointPosition.y,
-
- // Appearance
- tension: point.custom && point.custom.tension ? point.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
- radius: point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().pointRadius, index, this.chart.options.elements.point.radius),
- backgroundColor: point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor),
- borderColor: point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor),
- borderWidth: point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth),
- pointStyle: point.custom && point.custom.pointStyle ? point.custom.pointStyle : helpers.getValueAtIndexOrDefault(this.getDataset().pointStyle, index, this.chart.options.elements.point.pointStyle),
-
- // Tooltip
- hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius),
- },
- });
-
- point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
- },
- updateBezierControlPoints: function() {
- helpers.each(this.getDataset().metaData, function(point, index) {
- var controlPoints = helpers.splineCurve(
- helpers.previousItem(this.getDataset().metaData, index, true)._model,
- point._model,
- helpers.nextItem(this.getDataset().metaData, index, true)._model,
- point._model.tension
- );
-
- // Prevent the bezier going outside of the bounds of the graph
- point._model.controlPointPreviousX = Math.max(Math.min(controlPoints.previous.x, this.chart.chartArea.right), this.chart.chartArea.left);
- point._model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
-
- point._model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, this.chart.chartArea.right), this.chart.chartArea.left);
- point._model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
-
- // Now pivot the point for animation
- point.pivot();
- }, this);
- },
-
- draw: function(ease) {
- var easingDecimal = ease || 1;
-
- // Transition Point Locations
- helpers.each(this.getDataset().metaData, function(point, index) {
- point.transition(easingDecimal);
- });
-
- // Transition and Draw the line
- this.getDataset().metaDataset.transition(easingDecimal).draw();
-
- // Draw the points
- helpers.each(this.getDataset().metaData, function(point) {
- point.draw();
- });
- },
-
- setHoverStyle: function(point) {
- // Point
- var dataset = this.chart.data.datasets[point._datasetIndex];
- var index = point._index;
-
- point._model.radius = point.custom && point.custom.hoverRadius ? point.custom.hoverRadius : helpers.getValueAtIndexOrDefault(dataset.pointHoverRadius, index, this.chart.options.elements.point.hoverRadius);
- point._model.backgroundColor = point.custom && point.custom.hoverBackgroundColor ? point.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBackgroundColor, index, helpers.color(point._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
- point._model.borderColor = point.custom && point.custom.hoverBorderColor ? point.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderColor, index, helpers.color(point._model.borderColor).saturate(0.5).darken(0.1).rgbString());
- point._model.borderWidth = point.custom && point.custom.hoverBorderWidth ? point.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderWidth, index, point._model.borderWidth);
- },
-
- removeHoverStyle: function(point) {
- var dataset = this.chart.data.datasets[point._datasetIndex];
- var index = point._index;
-
- point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius);
- point._model.backgroundColor = point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor);
- point._model.borderColor = point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor);
- point._model.borderWidth = point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth);
- }
- });
-};
+ var helpers = Chart.helpers;
+
+
+ Chart.defaults.radar = {
+ scale: {
+ type: "radialLinear"
+ },
+ elements: {
+ line: {
+ tension: 0 // no bezier in radar
+ }
+ }
+ };
+
+ Chart.controllers.radar = Chart.DatasetController.extend({
+ linkScales: function() {
+ // No need. Single scale only
+ },
+
+ addElements: function() {
+
+ this.getDataset().metaData = this.getDataset().metaData || [];
+
+ this.getDataset().metaDataset = this.getDataset().metaDataset || new Chart.elements.Line({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _points: this.getDataset().metaData,
+ _loop: true
+ });
+
+ helpers.each(this.getDataset().data, function(value, index) {
+ this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index,
+ _model: {
+ x: 0, //xScale.getPixelForValue(null, index, true),
+ y: 0 //this.chartArea.bottom,
+ }
+ });
+ }, this);
+ },
+ addElementAndReset: function(index) {
+ this.getDataset().metaData = this.getDataset().metaData || [];
+ var point = new Chart.elements.Point({
+ _chart: this.chart.chart,
+ _datasetIndex: this.index,
+ _index: index
+ });
+
+ // Reset the point
+ this.updateElement(point, index, true);
+
+ // Add to the points array
+ this.getDataset().metaData.splice(index, 0, point);
+
+ // Make sure bezier control points are updated
+ this.updateBezierControlPoints();
+ },
+
+ update: function update(reset) {
+
+ var line = this.getDataset().metaDataset;
+ var points = this.getDataset().metaData;
+
+ var scale = this.chart.scale;
+ var scaleBase;
+
+ if (scale.min < 0 && scale.max < 0) {
+ scaleBase = scale.getPointPositionForValue(0, scale.max);
+ } else if (scale.min > 0 && scale.max > 0) {
+ scaleBase = scale.getPointPositionForValue(0, scale.min);
+ } else {
+ scaleBase = scale.getPointPositionForValue(0, 0);
+ }
+
+ helpers.extend(this.getDataset().metaDataset, {
+ // Utility
+ _datasetIndex: this.index,
+ // Data
+ _children: this.getDataset().metaData,
+ // Model
+ _model: {
+ // Appearance
+ tension: line.custom && line.custom.tension ? line.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
+ backgroundColor: line.custom && line.custom.backgroundColor ? line.custom.backgroundColor : (this.getDataset().backgroundColor || this.chart.options.elements.line.backgroundColor),
+ borderWidth: line.custom && line.custom.borderWidth ? line.custom.borderWidth : (this.getDataset().borderWidth || this.chart.options.elements.line.borderWidth),
+ borderColor: line.custom && line.custom.borderColor ? line.custom.borderColor : (this.getDataset().borderColor || this.chart.options.elements.line.borderColor),
+ fill: line.custom && line.custom.fill ? line.custom.fill : (this.getDataset().fill !== undefined ? this.getDataset().fill : this.chart.options.elements.line.fill),
+ borderCapStyle: line.custom && line.custom.borderCapStyle ? line.custom.borderCapStyle : (this.getDataset().borderCapStyle || this.chart.options.elements.line.borderCapStyle),
+ borderDash: line.custom && line.custom.borderDash ? line.custom.borderDash : (this.getDataset().borderDash || this.chart.options.elements.line.borderDash),
+ borderDashOffset: line.custom && line.custom.borderDashOffset ? line.custom.borderDashOffset : (this.getDataset().borderDashOffset || this.chart.options.elements.line.borderDashOffset),
+ borderJoinStyle: line.custom && line.custom.borderJoinStyle ? line.custom.borderJoinStyle : (this.getDataset().borderJoinStyle || this.chart.options.elements.line.borderJoinStyle),
+
+ // Scale
+ scaleTop: scale.top,
+ scaleBottom: scale.bottom,
+ scaleZero: scaleBase
+ }
+ });
+
+ this.getDataset().metaDataset.pivot();
+
+ // Update Points
+ helpers.each(points, function(point, index) {
+ this.updateElement(point, index, reset);
+ }, this);
+
+
+ // Update bezier control points
+ this.updateBezierControlPoints();
+ },
+ updateElement: function(point, index, reset) {
+ var pointPosition = this.chart.scale.getPointPositionForValue(index, this.getDataset().data[index]);
+
+ helpers.extend(point, {
+ // Utility
+ _datasetIndex: this.index,
+ _index: index,
+ _scale: this.chart.scale,
+
+ // Desired view properties
+ _model: {
+ x: reset ? this.chart.scale.xCenter : pointPosition.x, // value not used in dataset scale, but we want a consistent API between scales
+ y: reset ? this.chart.scale.yCenter : pointPosition.y,
+
+ // Appearance
+ tension: point.custom && point.custom.tension ? point.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
+ radius: point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().pointRadius, index, this.chart.options.elements.point.radius),
+ backgroundColor: point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor),
+ borderColor: point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor),
+ borderWidth: point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth),
+ pointStyle: point.custom && point.custom.pointStyle ? point.custom.pointStyle : helpers.getValueAtIndexOrDefault(this.getDataset().pointStyle, index, this.chart.options.elements.point.pointStyle),
+
+ // Tooltip
+ hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius)
+ }
+ });
+
+ point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
+ },
+ updateBezierControlPoints: function() {
+ helpers.each(this.getDataset().metaData, function(point, index) {
+ var controlPoints = helpers.splineCurve(
+ helpers.previousItem(this.getDataset().metaData, index, true)._model,
+ point._model,
+ helpers.nextItem(this.getDataset().metaData, index, true)._model,
+ point._model.tension
+ );
+
+ // Prevent the bezier going outside of the bounds of the graph
+ point._model.controlPointPreviousX = Math.max(Math.min(controlPoints.previous.x, this.chart.chartArea.right), this.chart.chartArea.left);
+ point._model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
+
+ point._model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, this.chart.chartArea.right), this.chart.chartArea.left);
+ point._model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
+
+ // Now pivot the point for animation
+ point.pivot();
+ }, this);
+ },
+
+ draw: function(ease) {
+ var easingDecimal = ease || 1;
+
+ // Transition Point Locations
+ helpers.each(this.getDataset().metaData, function(point, index) {
+ point.transition(easingDecimal);
+ });
+
+ // Transition and Draw the line
+ this.getDataset().metaDataset.transition(easingDecimal).draw();
+
+ // Draw the points
+ helpers.each(this.getDataset().metaData, function(point) {
+ point.draw();
+ });
+ },
+
+ setHoverStyle: function(point) {
+ // Point
+ var dataset = this.chart.data.datasets[point._datasetIndex];
+ var index = point._index;
+
+ point._model.radius = point.custom && point.custom.hoverRadius ? point.custom.hoverRadius : helpers.getValueAtIndexOrDefault(dataset.pointHoverRadius, index, this.chart.options.elements.point.hoverRadius);
+ point._model.backgroundColor = point.custom && point.custom.hoverBackgroundColor ? point.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBackgroundColor, index, helpers.color(point._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
+ point._model.borderColor = point.custom && point.custom.hoverBorderColor ? point.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderColor, index, helpers.color(point._model.borderColor).saturate(0.5).darken(0.1).rgbString());
+ point._model.borderWidth = point.custom && point.custom.hoverBorderWidth ? point.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderWidth, index, point._model.borderWidth);
+ },
+
+ removeHoverStyle: function(point) {
+ var dataset = this.chart.data.datasets[point._datasetIndex];
+ var index = point._index;
+
+ point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius);
+ point._model.backgroundColor = point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor);
+ point._model.borderColor = point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor);
+ point._model.borderWidth = point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth);
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.animation = {
- duration: 1000,
- easing: "easeOutQuart",
- onProgress: helpers.noop,
- onComplete: helpers.noop,
- };
-
- Chart.Animation = Chart.Element.extend({
- currentStep: null, // the current animation step
- numSteps: 60, // default number of steps
- easing: "", // the easing to use for this animation
- render: null, // render function used by the animation service
-
- onAnimationProgress: null, // user specified callback to fire on each step of the animation
- onAnimationComplete: null, // user specified callback to fire when the animation finishes
- });
-
- Chart.animationService = {
- frameDuration: 17,
- animations: [],
- dropFrames: 0,
- addAnimation: function(chartInstance, animationObject, duration, lazy) {
-
- if (!lazy) {
- chartInstance.animating = true;
- }
-
- for (var index = 0; index < this.animations.length; ++index) {
- if (this.animations[index].chartInstance === chartInstance) {
- // replacing an in progress animation
- this.animations[index].animationObject = animationObject;
- return;
- }
- }
-
- this.animations.push({
- chartInstance: chartInstance,
- animationObject: animationObject
- });
-
- // If there are no animations queued, manually kickstart a digest, for lack of a better word
- if (this.animations.length == 1) {
- helpers.requestAnimFrame.call(window, this.digestWrapper);
- }
- },
- // Cancel the animation for a given chart instance
- cancelAnimation: function(chartInstance) {
- var index = helpers.findNextWhere(this.animations, function(animationWrapper) {
- return animationWrapper.chartInstance === chartInstance;
- });
-
- if (index) {
- this.animations.splice(index, 1);
- chartInstance.animating = false;
- }
- },
- // calls startDigest with the proper context
- digestWrapper: function() {
- Chart.animationService.startDigest.call(Chart.animationService);
- },
- startDigest: function() {
-
- var startTime = Date.now();
- var framesToDrop = 0;
-
- if (this.dropFrames > 1) {
- framesToDrop = Math.floor(this.dropFrames);
- this.dropFrames = this.dropFrames % 1;
- }
-
- for (var i = 0; i < this.animations.length; i++) {
- if (this.animations[i].animationObject.currentStep === null) {
- this.animations[i].animationObject.currentStep = 0;
- }
-
- this.animations[i].animationObject.currentStep += 1 + framesToDrop;
-
- if (this.animations[i].animationObject.currentStep > this.animations[i].animationObject.numSteps) {
- this.animations[i].animationObject.currentStep = this.animations[i].animationObject.numSteps;
- }
-
- this.animations[i].animationObject.render(this.animations[i].chartInstance, this.animations[i].animationObject);
- if (this.animations[i].animationObject.onAnimationProgress && this.animations[i].animationObject.onAnimationProgress.call) {
- this.animations[i].animationObject.onAnimationProgress.call(this.animations[i].chartInstance, this.animations[i]);
- }
-
- if (this.animations[i].animationObject.currentStep == this.animations[i].animationObject.numSteps) {
- if (this.animations[i].animationObject.onAnimationComplete && this.animations[i].animationObject.onAnimationComplete.call) {
- this.animations[i].animationObject.onAnimationComplete.call(this.animations[i].chartInstance, this.animations[i]);
- }
-
- // executed the last frame. Remove the animation.
- this.animations[i].chartInstance.animating = false;
- this.animations.splice(i, 1);
- // Keep the index in place to offset the splice
- i--;
- }
- }
-
- var endTime = Date.now();
- var dropFrames = (endTime - startTime) / this.frameDuration;
-
- this.dropFrames += dropFrames;
-
- // Do we have more stuff to animate?
- if (this.animations.length > 0) {
- helpers.requestAnimFrame.call(window, this.digestWrapper);
- }
- }
- };
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.animation = {
+ duration: 1000,
+ easing: "easeOutQuart",
+ onProgress: helpers.noop,
+ onComplete: helpers.noop
+ };
+
+ Chart.Animation = Chart.Element.extend({
+ currentStep: null, // the current animation step
+ numSteps: 60, // default number of steps
+ easing: "", // the easing to use for this animation
+ render: null, // render function used by the animation service
+
+ onAnimationProgress: null, // user specified callback to fire on each step of the animation
+ onAnimationComplete: null // user specified callback to fire when the animation finishes
+ });
+
+ Chart.animationService = {
+ frameDuration: 17,
+ animations: [],
+ dropFrames: 0,
+ addAnimation: function(chartInstance, animationObject, duration, lazy) {
+
+ if (!lazy) {
+ chartInstance.animating = true;
+ }
+
+ for (var index = 0; index < this.animations.length; ++index) {
+ if (this.animations[index].chartInstance === chartInstance) {
+ // replacing an in progress animation
+ this.animations[index].animationObject = animationObject;
+ return;
+ }
+ }
+
+ this.animations.push({
+ chartInstance: chartInstance,
+ animationObject: animationObject
+ });
+
+ // If there are no animations queued, manually kickstart a digest, for lack of a better word
+ if (this.animations.length === 1) {
+ helpers.requestAnimFrame.call(window, this.digestWrapper);
+ }
+ },
+ // Cancel the animation for a given chart instance
+ cancelAnimation: function(chartInstance) {
+ var index = helpers.findNextWhere(this.animations, function(animationWrapper) {
+ return animationWrapper.chartInstance === chartInstance;
+ });
+
+ if (index) {
+ this.animations.splice(index, 1);
+ chartInstance.animating = false;
+ }
+ },
+ // calls startDigest with the proper context
+ digestWrapper: function() {
+ Chart.animationService.startDigest.call(Chart.animationService);
+ },
+ startDigest: function() {
+
+ var startTime = Date.now();
+ var framesToDrop = 0;
+
+ if (this.dropFrames > 1) {
+ framesToDrop = Math.floor(this.dropFrames);
+ this.dropFrames = this.dropFrames % 1;
+ }
+
+ for (var i = 0; i < this.animations.length; i++) {
+ if (this.animations[i].animationObject.currentStep === null) {
+ this.animations[i].animationObject.currentStep = 0;
+ }
+
+ this.animations[i].animationObject.currentStep += 1 + framesToDrop;
+
+ if (this.animations[i].animationObject.currentStep > this.animations[i].animationObject.numSteps) {
+ this.animations[i].animationObject.currentStep = this.animations[i].animationObject.numSteps;
+ }
+
+ this.animations[i].animationObject.render(this.animations[i].chartInstance, this.animations[i].animationObject);
+ if (this.animations[i].animationObject.onAnimationProgress && this.animations[i].animationObject.onAnimationProgress.call) {
+ this.animations[i].animationObject.onAnimationProgress.call(this.animations[i].chartInstance, this.animations[i]);
+ }
+
+ if (this.animations[i].animationObject.currentStep === this.animations[i].animationObject.numSteps) {
+ if (this.animations[i].animationObject.onAnimationComplete && this.animations[i].animationObject.onAnimationComplete.call) {
+ this.animations[i].animationObject.onAnimationComplete.call(this.animations[i].chartInstance, this.animations[i]);
+ }
+
+ // executed the last frame. Remove the animation.
+ this.animations[i].chartInstance.animating = false;
+ this.animations.splice(i, 1);
+ // Keep the index in place to offset the splice
+ i--;
+ }
+ }
+
+ var endTime = Date.now();
+ var dropFrames = (endTime - startTime) / this.frameDuration;
+
+ this.dropFrames += dropFrames;
+
+ // Do we have more stuff to animate?
+ if (this.animations.length > 0) {
+ helpers.requestAnimFrame.call(window, this.digestWrapper);
+ }
+ }
+ };
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
- //Create a dictionary of chart types, to allow for extension of existing types
- Chart.types = {};
+ var helpers = Chart.helpers;
+ //Create a dictionary of chart types, to allow for extension of existing types
+ Chart.types = {};
- //Store a reference to each instance - allowing us to globally resize chart instances on window resize.
- //Destroy method on the chart will remove the instance of the chart from this reference.
- Chart.instances = {};
-
- // Controllers available for dataset visualization eg. bar, line, slice, etc.
- Chart.controllers = {};
+ //Store a reference to each instance - allowing us to globally resize chart instances on window resize.
+ //Destroy method on the chart will remove the instance of the chart from this reference.
+ Chart.instances = {};
+
+ // Controllers available for dataset visualization eg. bar, line, slice, etc.
+ Chart.controllers = {};
- // The main controller of a chart
- Chart.Controller = function(instance) {
-
- this.chart = instance;
- this.config = instance.config;
- this.options = this.config.options = helpers.configMerge(Chart.defaults.global, Chart.defaults[this.config.type], this.config.options || {});
- this.id = helpers.uid();
-
- Object.defineProperty(this, 'data', {
- get: function() {
- return this.config.data;
- },
- });
-
- //Add the chart instance to the global namespace
- Chart.instances[this.id] = this;
-
- if (this.options.responsive) {
- // Silent resize before chart draws
- this.resize(true);
- }
-
- this.initialize.call(this);
-
- return this;
- };
-
- helpers.extend(Chart.Controller.prototype, {
-
- initialize: function initialize() {
-
- // TODO
- // If BeforeInit(this) doesn't return false, proceed
-
- this.bindEvents();
-
- // Make sure controllers are built first so that each dataset is bound to an axis before the scales
- // are built
- this.ensureScalesHaveIDs();
- this.buildOrUpdateControllers();
- this.buildScales();
- this.buildSurroundingItems();
- this.updateLayout();
- this.resetElements();
- this.initToolTip();
- this.draw();
- this.update();
-
- // TODO
- // If AfterInit(this) doesn't return false, proceed
-
- return this;
- },
-
- clear: function clear() {
- helpers.clear(this.chart);
- return this;
- },
-
- stop: function stop() {
- // Stops any current animation loop occuring
- Chart.animationService.cancelAnimation(this);
- return this;
- },
-
- resize: function resize(silent) {
- var canvas = this.chart.canvas;
- var newWidth = helpers.getMaximumWidth(this.chart.canvas);
- var newHeight = (this.options.maintainAspectRatio && isNaN(this.chart.aspectRatio) === false && isFinite(this.chart.aspectRatio) && this.chart.aspectRatio !== 0) ? newWidth / this.chart.aspectRatio : helpers.getMaximumHeight(this.chart.canvas);
-
- var sizeChanged = this.chart.width !== newWidth || this.chart.height !== newHeight;
-
- if (!sizeChanged)
- return this;
-
- canvas.width = this.chart.width = newWidth;
- canvas.height = this.chart.height = newHeight;
-
- helpers.retinaScale(this.chart);
-
- if (!silent) {
- this.stop();
- this.update(this.options.responsiveAnimationDuration);
- }
-
- return this;
- },
- ensureScalesHaveIDs: function ensureScalesHaveIDs() {
- var defaultXAxisID = 'x-axis-';
- var defaultYAxisID = 'y-axis-';
-
- if (this.options.scales) {
- if (this.options.scales.xAxes && this.options.scales.xAxes.length) {
- helpers.each(this.options.scales.xAxes, function(xAxisOptions, index) {
- xAxisOptions.id = xAxisOptions.id || (defaultXAxisID + index);
- });
- }
-
- if (this.options.scales.yAxes && this.options.scales.yAxes.length) {
- // Build the y axes
- helpers.each(this.options.scales.yAxes, function(yAxisOptions, index) {
- yAxisOptions.id = yAxisOptions.id || (defaultYAxisID + index);
- });
- }
- }
- },
- buildScales: function buildScales() {
- // Map of scale ID to scale object so we can lookup later
- this.scales = {};
-
- // Build the x axes
- if (this.options.scales) {
- if (this.options.scales.xAxes && this.options.scales.xAxes.length) {
- helpers.each(this.options.scales.xAxes, function(xAxisOptions, index) {
- var ScaleClass = Chart.scaleService.getScaleConstructor(xAxisOptions.type);
- if (ScaleClass) {
- var scale = new ScaleClass({
- ctx: this.chart.ctx,
- options: xAxisOptions,
- chart: this,
- id: xAxisOptions.id,
- });
-
- this.scales[scale.id] = scale;
- }
- }, this);
- }
-
- if (this.options.scales.yAxes && this.options.scales.yAxes.length) {
- // Build the y axes
- helpers.each(this.options.scales.yAxes, function(yAxisOptions, index) {
- var ScaleClass = Chart.scaleService.getScaleConstructor(yAxisOptions.type);
- if (ScaleClass) {
- var scale = new ScaleClass({
- ctx: this.chart.ctx,
- options: yAxisOptions,
- chart: this,
- id: yAxisOptions.id,
- });
-
- this.scales[scale.id] = scale;
- }
- }, this);
- }
- }
- if (this.options.scale) {
- // Build radial axes
- var ScaleClass = Chart.scaleService.getScaleConstructor(this.options.scale.type);
- if (ScaleClass) {
- var scale = new ScaleClass({
- ctx: this.chart.ctx,
- options: this.options.scale,
- chart: this,
- });
-
- this.scale = scale;
-
- this.scales.radialScale = scale;
- }
- }
-
- Chart.scaleService.addScalesToLayout(this);
- },
-
- buildSurroundingItems: function() {
- if (this.options.title) {
- this.titleBlock = new Chart.Title({
- ctx: this.chart.ctx,
- options: this.options.title,
- chart: this
- });
-
- Chart.layoutService.addBox(this, this.titleBlock);
- }
-
- if (this.options.legend) {
- this.legend = new Chart.Legend({
- ctx: this.chart.ctx,
- options: this.options.legend,
- chart: this,
- });
-
- Chart.layoutService.addBox(this, this.legend);
- }
- },
-
- updateLayout: function() {
- Chart.layoutService.update(this, this.chart.width, this.chart.height);
- },
-
- buildOrUpdateControllers: function buildOrUpdateControllers() {
- var types = [];
- var newControllers = [];
-
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- if (!dataset.type) {
- dataset.type = this.config.type;
- }
-
- var type = dataset.type;
- types.push(type);
-
- if (dataset.controller) {
- dataset.controller.updateIndex(datasetIndex);
- } else {
- dataset.controller = new Chart.controllers[type](this, datasetIndex);
- newControllers.push(dataset.controller);
- }
- }, this);
-
- if (types.length > 1) {
- for (var i = 1; i < types.length; i++) {
- if (types[i] != types[i - 1]) {
- this.isCombo = true;
- break;
- }
- }
- }
-
- return newControllers;
- },
-
- resetElements: function resetElements() {
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- dataset.controller.reset();
- });
- },
-
- update: function update(animationDuration, lazy) {
- // In case the entire data object changed
- this.tooltip._data = this.data;
-
- // Make sure dataset controllers are updated and new controllers are reset
- var newControllers = this.buildOrUpdateControllers();
-
- Chart.layoutService.update(this, this.chart.width, this.chart.height);
-
- // Can only reset the new controllers after the scales have been updated
- helpers.each(newControllers, function(controller) {
- controller.reset();
- });
-
- // Make sure all dataset controllers have correct meta data counts
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- dataset.controller.buildOrUpdateElements();
- });
-
- // This will loop through any data and do the appropriate element update for the type
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- dataset.controller.update();
- });
- this.render(animationDuration, lazy);
- },
-
- render: function render(duration, lazy) {
-
- if (this.options.animation && ((typeof duration !== 'undefined' && duration !== 0) || (typeof duration == 'undefined' && this.options.animation.duration !== 0))) {
- var animation = new Chart.Animation();
- animation.numSteps = (duration || this.options.animation.duration) / 16.66; //60 fps
- animation.easing = this.options.animation.easing;
-
- // render function
- animation.render = function(chartInstance, animationObject) {
- var easingFunction = helpers.easingEffects[animationObject.easing];
- var stepDecimal = animationObject.currentStep / animationObject.numSteps;
- var easeDecimal = easingFunction(stepDecimal);
-
- chartInstance.draw(easeDecimal, stepDecimal, animationObject.currentStep);
- };
-
- // user events
- animation.onAnimationProgress = this.options.animation.onProgress;
- animation.onAnimationComplete = this.options.animation.onComplete;
-
- Chart.animationService.addAnimation(this, animation, duration, lazy);
- } else {
- this.draw();
- if (this.options.animation && this.options.animation.onComplete && this.options.animation.onComplete.call) {
- this.options.animation.onComplete.call(this);
- }
- }
- return this;
- },
-
- draw: function(ease) {
- var easingDecimal = ease || 1;
- this.clear();
-
- // Draw all the scales
- helpers.each(this.boxes, function(box) {
- box.draw(this.chartArea);
- }, this);
- if (this.scale) {
- this.scale.draw();
- }
-
- // Draw each dataset via its respective controller (reversed to support proper line stacking)
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- if (helpers.isDatasetVisible(dataset)) {
- dataset.controller.draw(ease);
- }
- });
-
- // Finally draw the tooltip
- this.tooltip.transition(easingDecimal).draw();
- },
-
- // Get the single element that was clicked on
- // @return : An object containing the dataset index and element index of the matching element. Also contains the rectangle that was draw
- getElementAtEvent: function(e) {
-
- var eventPosition = helpers.getRelativePosition(e, this.chart);
- var elementsArray = [];
-
- helpers.each(this.data.datasets, function(dataset, datasetIndex) {
- if (helpers.isDatasetVisible(dataset)) {
- helpers.each(dataset.metaData, function(element, index) {
- if (element.inRange(eventPosition.x, eventPosition.y)) {
- elementsArray.push(element);
- return elementsArray;
- }
- });
- }
- });
-
- return elementsArray;
- },
-
- getElementsAtEvent: function(e) {
- var eventPosition = helpers.getRelativePosition(e, this.chart);
- var elementsArray = [];
-
- var found = (function() {
- for (var i = 0; i < this.data.datasets.length; i++) {
- if (helpers.isDatasetVisible(this.data.datasets[i])) {
- for (var j = 0; j < this.data.datasets[i].metaData.length; j++) {
- if (this.data.datasets[i].metaData[j].inRange(eventPosition.x, eventPosition.y)) {
- return this.data.datasets[i].metaData[j];
- }
- }
- }
- }
- }).call(this);
-
- if (!found) {
- return elementsArray;
- }
-
- helpers.each(this.data.datasets, function(dataset, dsIndex) {
- if (helpers.isDatasetVisible(dataset)) {
- elementsArray.push(dataset.metaData[found._index]);
- }
- });
-
- return elementsArray;
- },
-
- getDatasetAtEvent: function(e) {
- var elementsArray = this.getElementAtEvent(e);
-
- if (elementsArray.length > 0) {
- elementsArray = this.data.datasets[elementsArray[0]._datasetIndex].metaData;
- }
-
- return elementsArray;
- },
-
- generateLegend: function generateLegend() {
- return this.options.legendCallback(this);
- },
-
- destroy: function destroy() {
- this.clear();
- helpers.unbindEvents(this, this.events);
- helpers.removeResizeListener(this.chart.canvas.parentNode);
-
- // Reset canvas height/width attributes
- var canvas = this.chart.canvas;
- canvas.width = this.chart.width;
- canvas.height = this.chart.height;
-
- // if we scaled the canvas in response to a devicePixelRatio !== 1, we need to undo that transform here
- if (this.chart.originalDevicePixelRatio !== undefined) {
- this.chart.ctx.scale(1 / this.chart.originalDevicePixelRatio, 1 / this.chart.originalDevicePixelRatio);
- }
-
- // Reset to the old style since it may have been changed by the device pixel ratio changes
- canvas.style.width = this.chart.originalCanvasStyleWidth;
- canvas.style.height = this.chart.originalCanvasStyleHeight;
-
- delete Chart.instances[this.id];
- },
-
- toBase64Image: function toBase64Image() {
- return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
- },
-
- initToolTip: function initToolTip() {
- this.tooltip = new Chart.Tooltip({
- _chart: this.chart,
- _chartInstance: this,
- _data: this.data,
- _options: this.options,
- }, this);
- },
-
- bindEvents: function bindEvents() {
- helpers.bindEvents(this, this.options.events, function(evt) {
- this.eventHandler(evt);
- });
- },
- eventHandler: function eventHandler(e) {
- this.lastActive = this.lastActive || [];
- this.lastTooltipActive = this.lastTooltipActive || [];
-
- // Find Active Elements for hover and tooltips
- if (e.type == 'mouseout') {
- this.active = [];
- this.tooltipActive = [];
- } else {
-
- var _this = this;
- var getItemsForMode = function(mode) {
- switch (mode) {
- case 'single':
- return _this.getElementAtEvent(e);
- case 'label':
- return _this.getElementsAtEvent(e);
- case 'dataset':
- return _this.getDatasetAtEvent(e);
- default:
- return e;
- }
- };
-
- this.active = getItemsForMode(this.options.hover.mode);
- this.tooltipActive = getItemsForMode(this.options.tooltips.mode);
- }
-
- // On Hover hook
- if (this.options.hover.onHover) {
- this.options.hover.onHover.call(this, this.active);
- }
-
- if (e.type == 'mouseup' || e.type == 'click') {
- if (this.options.onClick) {
- this.options.onClick.call(this, e, this.active);
- }
-
- if (this.legend && this.legend.handleEvent) {
- this.legend.handleEvent(e);
- }
- }
-
- var dataset;
- var index;
-
- // Remove styling for last active (even if it may still be active)
- if (this.lastActive.length) {
- switch (this.options.hover.mode) {
- case 'single':
- this.data.datasets[this.lastActive[0]._datasetIndex].controller.removeHoverStyle(this.lastActive[0], this.lastActive[0]._datasetIndex, this.lastActive[0]._index);
- break;
- case 'label':
- case 'dataset':
- for (var i = 0; i < this.lastActive.length; i++) {
- if (this.lastActive[i])
- this.data.datasets[this.lastActive[i]._datasetIndex].controller.removeHoverStyle(this.lastActive[i], this.lastActive[i]._datasetIndex, this.lastActive[i]._index);
- }
- break;
- default:
- // Don't change anything
- }
- }
-
- // Built in hover styling
- if (this.active.length && this.options.hover.mode) {
- switch (this.options.hover.mode) {
- case 'single':
- this.data.datasets[this.active[0]._datasetIndex].controller.setHoverStyle(this.active[0]);
- break;
- case 'label':
- case 'dataset':
- for (var j = 0; j < this.active.length; j++) {
- if (this.active[j])
- this.data.datasets[this.active[j]._datasetIndex].controller.setHoverStyle(this.active[j]);
- }
- break;
- default:
- // Don't change anything
- }
- }
-
-
- // Built in Tooltips
- if (this.options.tooltips.enabled || this.options.tooltips.custom) {
-
- // The usual updates
- this.tooltip.initialize();
- this.tooltip._active = this.tooltipActive;
- this.tooltip.update();
- }
-
- // Hover animations
- this.tooltip.pivot();
-
- if (!this.animating) {
- var changed;
-
- helpers.each(this.active, function(element, index) {
- if (element !== this.lastActive[index]) {
- changed = true;
- }
- }, this);
-
- helpers.each(this.tooltipActive, function(element, index) {
- if (element !== this.lastTooltipActive[index]) {
- changed = true;
- }
- }, this);
-
- // If entering, leaving, or changing elements, animate the change via pivot
- if ((this.lastActive.length !== this.active.length) ||
- (this.lastTooltipActive.length !== this.tooltipActive.length) ||
- changed) {
-
- this.stop();
-
- if (this.options.tooltips.enabled || this.options.tooltips.custom) {
- this.tooltip.update(true);
- }
-
- // We only need to render at this point. Updating will cause scales to be recomputed generating flicker & using more
- // memory than necessary.
- this.render(this.options.hover.animationDuration, true);
- }
- }
-
- // Remember Last Actives
- this.lastActive = this.active;
- this.lastTooltipActive = this.tooltipActive;
- return this;
- },
- });
-};
+ // The main controller of a chart
+ Chart.Controller = function(instance) {
+
+ this.chart = instance;
+ this.config = instance.config;
+ this.options = this.config.options = helpers.configMerge(Chart.defaults.global, Chart.defaults[this.config.type], this.config.options || {});
+ this.id = helpers.uid();
+
+ Object.defineProperty(this, 'data', {
+ get: function() {
+ return this.config.data;
+ }
+ });
+
+ //Add the chart instance to the global namespace
+ Chart.instances[this.id] = this;
+
+ if (this.options.responsive) {
+ // Silent resize before chart draws
+ this.resize(true);
+ }
+
+ this.initialize();
+
+ return this;
+ };
+
+ helpers.extend(Chart.Controller.prototype, {
+
+ initialize: function initialize() {
+
+ // TODO
+ // If BeforeInit(this) doesn't return false, proceed
+
+ this.bindEvents();
+
+ // Make sure controllers are built first so that each dataset is bound to an axis before the scales
+ // are built
+ this.ensureScalesHaveIDs();
+ this.buildOrUpdateControllers();
+ this.buildScales();
+ this.buildSurroundingItems();
+ this.updateLayout();
+ this.resetElements();
+ this.initToolTip();
+ this.draw();
+ this.update();
+
+ // TODO
+ // If AfterInit(this) doesn't return false, proceed
+
+ return this;
+ },
+
+ clear: function clear() {
+ helpers.clear(this.chart);
+ return this;
+ },
+
+ stop: function stop() {
+ // Stops any current animation loop occuring
+ Chart.animationService.cancelAnimation(this);
+ return this;
+ },
+
+ resize: function resize(silent) {
+ var canvas = this.chart.canvas;
+ var newWidth = helpers.getMaximumWidth(this.chart.canvas);
+ var newHeight = (this.options.maintainAspectRatio && isNaN(this.chart.aspectRatio) === false && isFinite(this.chart.aspectRatio) && this.chart.aspectRatio !== 0) ? newWidth / this.chart.aspectRatio : helpers.getMaximumHeight(this.chart.canvas);
+
+ var sizeChanged = this.chart.width !== newWidth || this.chart.height !== newHeight;
+
+ if (!sizeChanged)
+ return this;
+
+ canvas.width = this.chart.width = newWidth;
+ canvas.height = this.chart.height = newHeight;
+
+ helpers.retinaScale(this.chart);
+
+ if (!silent) {
+ this.stop();
+ this.update(this.options.responsiveAnimationDuration);
+ }
+
+ return this;
+ },
+ ensureScalesHaveIDs: function ensureScalesHaveIDs() {
+ var defaultXAxisID = 'x-axis-';
+ var defaultYAxisID = 'y-axis-';
+
+ if (this.options.scales) {
+ if (this.options.scales.xAxes && this.options.scales.xAxes.length) {
+ helpers.each(this.options.scales.xAxes, function(xAxisOptions, index) {
+ xAxisOptions.id = xAxisOptions.id || (defaultXAxisID + index);
+ });
+ }
+
+ if (this.options.scales.yAxes && this.options.scales.yAxes.length) {
+ // Build the y axes
+ helpers.each(this.options.scales.yAxes, function(yAxisOptions, index) {
+ yAxisOptions.id = yAxisOptions.id || (defaultYAxisID + index);
+ });
+ }
+ }
+ },
+ buildScales: function buildScales() {
+ // Map of scale ID to scale object so we can lookup later
+ this.scales = {};
+
+ // Build the x axes
+ if (this.options.scales) {
+ if (this.options.scales.xAxes && this.options.scales.xAxes.length) {
+ helpers.each(this.options.scales.xAxes, function(xAxisOptions, index) {
+ var ScaleClass = Chart.scaleService.getScaleConstructor(xAxisOptions.type);
+ if (ScaleClass) {
+ var scale = new ScaleClass({
+ ctx: this.chart.ctx,
+ options: xAxisOptions,
+ chart: this,
+ id: xAxisOptions.id
+ });
+
+ this.scales[scale.id] = scale;
+ }
+ }, this);
+ }
+
+ if (this.options.scales.yAxes && this.options.scales.yAxes.length) {
+ // Build the y axes
+ helpers.each(this.options.scales.yAxes, function(yAxisOptions, index) {
+ var ScaleClass = Chart.scaleService.getScaleConstructor(yAxisOptions.type);
+ if (ScaleClass) {
+ var scale = new ScaleClass({
+ ctx: this.chart.ctx,
+ options: yAxisOptions,
+ chart: this,
+ id: yAxisOptions.id
+ });
+
+ this.scales[scale.id] = scale;
+ }
+ }, this);
+ }
+ }
+ if (this.options.scale) {
+ // Build radial axes
+ var ScaleClass = Chart.scaleService.getScaleConstructor(this.options.scale.type);
+ if (ScaleClass) {
+ var scale = new ScaleClass({
+ ctx: this.chart.ctx,
+ options: this.options.scale,
+ chart: this
+ });
+
+ this.scale = scale;
+
+ this.scales.radialScale = scale;
+ }
+ }
+
+ Chart.scaleService.addScalesToLayout(this);
+ },
+
+ buildSurroundingItems: function() {
+ if (this.options.title) {
+ this.titleBlock = new Chart.Title({
+ ctx: this.chart.ctx,
+ options: this.options.title,
+ chart: this
+ });
+
+ Chart.layoutService.addBox(this, this.titleBlock);
+ }
+
+ if (this.options.legend) {
+ this.legend = new Chart.Legend({
+ ctx: this.chart.ctx,
+ options: this.options.legend,
+ chart: this
+ });
+
+ Chart.layoutService.addBox(this, this.legend);
+ }
+ },
+
+ updateLayout: function() {
+ Chart.layoutService.update(this, this.chart.width, this.chart.height);
+ },
+
+ buildOrUpdateControllers: function buildOrUpdateControllers() {
+ var types = [];
+ var newControllers = [];
+
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ if (!dataset.type) {
+ dataset.type = this.config.type;
+ }
+
+ var type = dataset.type;
+ types.push(type);
+
+ if (dataset.controller) {
+ dataset.controller.updateIndex(datasetIndex);
+ } else {
+ dataset.controller = new Chart.controllers[type](this, datasetIndex);
+ newControllers.push(dataset.controller);
+ }
+ }, this);
+
+ if (types.length > 1) {
+ for (var i = 1; i < types.length; i++) {
+ if (types[i] !== types[i - 1]) {
+ this.isCombo = true;
+ break;
+ }
+ }
+ }
+
+ return newControllers;
+ },
+
+ resetElements: function resetElements() {
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ dataset.controller.reset();
+ });
+ },
+
+ update: function update(animationDuration, lazy) {
+ // In case the entire data object changed
+ this.tooltip._data = this.data;
+
+ // Make sure dataset controllers are updated and new controllers are reset
+ var newControllers = this.buildOrUpdateControllers();
+
+ Chart.layoutService.update(this, this.chart.width, this.chart.height);
+
+ // Can only reset the new controllers after the scales have been updated
+ helpers.each(newControllers, function(controller) {
+ controller.reset();
+ });
+
+ // Make sure all dataset controllers have correct meta data counts
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ dataset.controller.buildOrUpdateElements();
+ });
+
+ // This will loop through any data and do the appropriate element update for the type
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ dataset.controller.update();
+ });
+ this.render(animationDuration, lazy);
+ },
+
+ render: function render(duration, lazy) {
+
+ if (this.options.animation && ((typeof duration !== 'undefined' && duration !== 0) || (typeof duration === 'undefined' && this.options.animation.duration !== 0))) {
+ var animation = new Chart.Animation();
+ animation.numSteps = (duration || this.options.animation.duration) / 16.66; //60 fps
+ animation.easing = this.options.animation.easing;
+
+ // render function
+ animation.render = function(chartInstance, animationObject) {
+ var easingFunction = helpers.easingEffects[animationObject.easing];
+ var stepDecimal = animationObject.currentStep / animationObject.numSteps;
+ var easeDecimal = easingFunction(stepDecimal);
+
+ chartInstance.draw(easeDecimal, stepDecimal, animationObject.currentStep);
+ };
+
+ // user events
+ animation.onAnimationProgress = this.options.animation.onProgress;
+ animation.onAnimationComplete = this.options.animation.onComplete;
+
+ Chart.animationService.addAnimation(this, animation, duration, lazy);
+ } else {
+ this.draw();
+ if (this.options.animation && this.options.animation.onComplete && this.options.animation.onComplete.call) {
+ this.options.animation.onComplete.call(this);
+ }
+ }
+ return this;
+ },
+
+ draw: function(ease) {
+ var easingDecimal = ease || 1;
+ this.clear();
+
+ // Draw all the scales
+ helpers.each(this.boxes, function(box) {
+ box.draw(this.chartArea);
+ }, this);
+ if (this.scale) {
+ this.scale.draw();
+ }
+
+ // Draw each dataset via its respective controller (reversed to support proper line stacking)
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ if (helpers.isDatasetVisible(dataset)) {
+ dataset.controller.draw(ease);
+ }
+ });
+
+ // Finally draw the tooltip
+ this.tooltip.transition(easingDecimal).draw();
+ },
+
+ // Get the single element that was clicked on
+ // @return : An object containing the dataset index and element index of the matching element. Also contains the rectangle that was draw
+ getElementAtEvent: function(e) {
+
+ var eventPosition = helpers.getRelativePosition(e, this.chart);
+ var elementsArray = [];
+
+ helpers.each(this.data.datasets, function(dataset, datasetIndex) {
+ if (helpers.isDatasetVisible(dataset)) {
+ helpers.each(dataset.metaData, function(element, index) {
+ if (element.inRange(eventPosition.x, eventPosition.y)) {
+ elementsArray.push(element);
+ return elementsArray;
+ }
+ });
+ }
+ });
+
+ return elementsArray;
+ },
+
+ getElementsAtEvent: function(e) {
+ var eventPosition = helpers.getRelativePosition(e, this.chart);
+ var elementsArray = [];
+
+ var found = (function() {
+ for (var i = 0; i < this.data.datasets.length; i++) {
+ if (helpers.isDatasetVisible(this.data.datasets[i])) {
+ for (var j = 0; j < this.data.datasets[i].metaData.length; j++) {
+ if (this.data.datasets[i].metaData[j].inRange(eventPosition.x, eventPosition.y)) {
+ return this.data.datasets[i].metaData[j];
+ }
+ }
+ }
+ }
+ }).call(this);
+
+ if (!found) {
+ return elementsArray;
+ }
+
+ helpers.each(this.data.datasets, function(dataset, dsIndex) {
+ if (helpers.isDatasetVisible(dataset)) {
+ elementsArray.push(dataset.metaData[found._index]);
+ }
+ });
+
+ return elementsArray;
+ },
+
+ getDatasetAtEvent: function(e) {
+ var elementsArray = this.getElementAtEvent(e);
+
+ if (elementsArray.length > 0) {
+ elementsArray = this.data.datasets[elementsArray[0]._datasetIndex].metaData;
+ }
+
+ return elementsArray;
+ },
+
+ generateLegend: function generateLegend() {
+ return this.options.legendCallback(this);
+ },
+
+ destroy: function destroy() {
+ this.clear();
+ helpers.unbindEvents(this, this.events);
+ helpers.removeResizeListener(this.chart.canvas.parentNode);
+
+ // Reset canvas height/width attributes
+ var canvas = this.chart.canvas;
+ canvas.width = this.chart.width;
+ canvas.height = this.chart.height;
+
+ // if we scaled the canvas in response to a devicePixelRatio !== 1, we need to undo that transform here
+ if (this.chart.originalDevicePixelRatio !== undefined) {
+ this.chart.ctx.scale(1 / this.chart.originalDevicePixelRatio, 1 / this.chart.originalDevicePixelRatio);
+ }
+
+ // Reset to the old style since it may have been changed by the device pixel ratio changes
+ canvas.style.width = this.chart.originalCanvasStyleWidth;
+ canvas.style.height = this.chart.originalCanvasStyleHeight;
+
+ delete Chart.instances[this.id];
+ },
+
+ toBase64Image: function toBase64Image() {
+ return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
+ },
+
+ initToolTip: function initToolTip() {
+ this.tooltip = new Chart.Tooltip({
+ _chart: this.chart,
+ _chartInstance: this,
+ _data: this.data,
+ _options: this.options
+ }, this);
+ },
+
+ bindEvents: function bindEvents() {
+ helpers.bindEvents(this, this.options.events, function(evt) {
+ this.eventHandler(evt);
+ });
+ },
+ eventHandler: function eventHandler(e) {
+ this.lastActive = this.lastActive || [];
+ this.lastTooltipActive = this.lastTooltipActive || [];
+
+ // Find Active Elements for hover and tooltips
+ if (e.type === 'mouseout') {
+ this.active = [];
+ this.tooltipActive = [];
+ } else {
+
+ var _this = this;
+ var getItemsForMode = function(mode) {
+ switch (mode) {
+ case 'single':
+ return _this.getElementAtEvent(e);
+ case 'label':
+ return _this.getElementsAtEvent(e);
+ case 'dataset':
+ return _this.getDatasetAtEvent(e);
+ default:
+ return e;
+ }
+ };
+
+ this.active = getItemsForMode(this.options.hover.mode);
+ this.tooltipActive = getItemsForMode(this.options.tooltips.mode);
+ }
+
+ // On Hover hook
+ if (this.options.hover.onHover) {
+ this.options.hover.onHover.call(this, this.active);
+ }
+
+ if (e.type === 'mouseup' || e.type === 'click') {
+ if (this.options.onClick) {
+ this.options.onClick.call(this, e, this.active);
+ }
+
+ if (this.legend && this.legend.handleEvent) {
+ this.legend.handleEvent(e);
+ }
+ }
+
+ var dataset;
+ var index;
+
+ // Remove styling for last active (even if it may still be active)
+ if (this.lastActive.length) {
+ switch (this.options.hover.mode) {
+ case 'single':
+ this.data.datasets[this.lastActive[0]._datasetIndex].controller.removeHoverStyle(this.lastActive[0], this.lastActive[0]._datasetIndex, this.lastActive[0]._index);
+ break;
+ case 'label':
+ case 'dataset':
+ for (var i = 0; i < this.lastActive.length; i++) {
+ if (this.lastActive[i])
+ this.data.datasets[this.lastActive[i]._datasetIndex].controller.removeHoverStyle(this.lastActive[i], this.lastActive[i]._datasetIndex, this.lastActive[i]._index);
+ }
+ break;
+ default:
+ // Don't change anything
+ }
+ }
+
+ // Built in hover styling
+ if (this.active.length && this.options.hover.mode) {
+ switch (this.options.hover.mode) {
+ case 'single':
+ this.data.datasets[this.active[0]._datasetIndex].controller.setHoverStyle(this.active[0]);
+ break;
+ case 'label':
+ case 'dataset':
+ for (var j = 0; j < this.active.length; j++) {
+ if (this.active[j])
+ this.data.datasets[this.active[j]._datasetIndex].controller.setHoverStyle(this.active[j]);
+ }
+ break;
+ default:
+ // Don't change anything
+ }
+ }
+
+
+ // Built in Tooltips
+ if (this.options.tooltips.enabled || this.options.tooltips.custom) {
+
+ // The usual updates
+ this.tooltip.initialize();
+ this.tooltip._active = this.tooltipActive;
+ this.tooltip.update();
+ }
+
+ // Hover animations
+ this.tooltip.pivot();
+
+ if (!this.animating) {
+ var changed;
+
+ helpers.each(this.active, function(element, index) {
+ if (element !== this.lastActive[index]) {
+ changed = true;
+ }
+ }, this);
+
+ helpers.each(this.tooltipActive, function(element, index) {
+ if (element !== this.lastTooltipActive[index]) {
+ changed = true;
+ }
+ }, this);
+
+ // If entering, leaving, or changing elements, animate the change via pivot
+ if ((this.lastActive.length !== this.active.length) ||
+ (this.lastTooltipActive.length !== this.tooltipActive.length) ||
+ changed) {
+
+ this.stop();
+
+ if (this.options.tooltips.enabled || this.options.tooltips.custom) {
+ this.tooltip.update(true);
+ }
+
+ // We only need to render at this point. Updating will cause scales to be recomputed generating flicker & using more
+ // memory than necessary.
+ this.render(this.options.hover.animationDuration, true);
+ }
+ }
+
+ // Remember Last Actives
+ this.lastActive = this.active;
+ this.lastTooltipActive = this.tooltipActive;
+ return this;
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
+ var helpers = Chart.helpers;
- // Base class for all dataset controllers (line, bar, etc)
- Chart.DatasetController = function(chart, datasetIndex) {
- this.initialize.call(this, chart, datasetIndex);
- };
+ // Base class for all dataset controllers (line, bar, etc)
+ Chart.DatasetController = function(chart, datasetIndex) {
+ this.initialize.call(this, chart, datasetIndex);
+ };
- helpers.extend(Chart.DatasetController.prototype, {
- initialize: function(chart, datasetIndex) {
- this.chart = chart;
- this.index = datasetIndex;
- this.linkScales();
- this.addElements();
- },
- updateIndex: function(datasetIndex) {
- this.index = datasetIndex;
- },
+ helpers.extend(Chart.DatasetController.prototype, {
+ initialize: function(chart, datasetIndex) {
+ this.chart = chart;
+ this.index = datasetIndex;
+ this.linkScales();
+ this.addElements();
+ },
+ updateIndex: function(datasetIndex) {
+ this.index = datasetIndex;
+ },
- linkScales: function() {
- if (!this.getDataset().xAxisID) {
- this.getDataset().xAxisID = this.chart.options.scales.xAxes[0].id;
- }
+ linkScales: function() {
+ if (!this.getDataset().xAxisID) {
+ this.getDataset().xAxisID = this.chart.options.scales.xAxes[0].id;
+ }
- if (!this.getDataset().yAxisID) {
- this.getDataset().yAxisID = this.chart.options.scales.yAxes[0].id;
- }
- },
+ if (!this.getDataset().yAxisID) {
+ this.getDataset().yAxisID = this.chart.options.scales.yAxes[0].id;
+ }
+ },
- getDataset: function() {
- return this.chart.data.datasets[this.index];
- },
+ getDataset: function() {
+ return this.chart.data.datasets[this.index];
+ },
- getScaleForId: function(scaleID) {
- return this.chart.scales[scaleID];
- },
+ getScaleForId: function(scaleID) {
+ return this.chart.scales[scaleID];
+ },
- reset: function() {
- this.update(true);
- },
+ reset: function() {
+ this.update(true);
+ },
- buildOrUpdateElements: function buildOrUpdateElements() {
- // Handle the number of data points changing
- var numData = this.getDataset().data.length;
- var numMetaData = this.getDataset().metaData.length;
+ buildOrUpdateElements: function buildOrUpdateElements() {
+ // Handle the number of data points changing
+ var numData = this.getDataset().data.length;
+ var numMetaData = this.getDataset().metaData.length;
- // Make sure that we handle number of datapoints changing
- if (numData < numMetaData) {
- // Remove excess bars for data points that have been removed
- this.getDataset().metaData.splice(numData, numMetaData - numData);
- } else if (numData > numMetaData) {
- // Add new elements
- for (var index = numMetaData; index < numData; ++index) {
- this.addElementAndReset(index);
- }
- }
- },
+ // Make sure that we handle number of datapoints changing
+ if (numData < numMetaData) {
+ // Remove excess bars for data points that have been removed
+ this.getDataset().metaData.splice(numData, numMetaData - numData);
+ } else if (numData > numMetaData) {
+ // Add new elements
+ for (var index = numMetaData; index < numData; ++index) {
+ this.addElementAndReset(index);
+ }
+ }
+ },
- // Controllers should implement the following
- addElements: helpers.noop,
- addElementAndReset: helpers.noop,
- draw: helpers.noop,
- removeHoverStyle: helpers.noop,
- setHoverStyle: helpers.noop,
- update: helpers.noop,
- });
+ // Controllers should implement the following
+ addElements: helpers.noop,
+ addElementAndReset: helpers.noop,
+ draw: helpers.noop,
+ removeHoverStyle: helpers.noop,
+ setHoverStyle: helpers.noop,
+ update: helpers.noop
+ });
- Chart.DatasetController.extend = helpers.inherits;
+ Chart.DatasetController.extend = helpers.inherits;
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- //Global Chart helpers object for utility methods and classes
- var helpers = Chart.helpers = {};
-
- //-- Basic js utility methods
- helpers.each = function(loopable, callback, self, reverse) {
- // Check to see if null or undefined firstly.
- var i, len;
- if (helpers.isArray(loopable)) {
- len = loopable.length;
- if (reverse) {
- for (i = len - 1; i >= 0; i--) {
- callback.call(self, loopable[i], i);
- }
- } else {
- for (i = 0; i < len; i++) {
- callback.call(self, loopable[i], i);
- }
- }
- } else if (typeof loopable === 'object') {
- var keys = Object.keys(loopable);
- len = keys.length;
- for (i = 0; i < len; i++) {
- callback.call(self, loopable[keys[i]], keys[i]);
- }
- }
- };
- helpers.clone = function(obj) {
- var objClone = {};
- helpers.each(obj, function(value, key) {
- if (obj.hasOwnProperty(key)) {
- if (helpers.isArray(value)) {
- objClone[key] = value.slice(0);
- } else if (typeof value === 'object' && value !== null) {
- objClone[key] = helpers.clone(value);
- } else {
- objClone[key] = value;
- }
- }
- });
- return objClone;
- };
- helpers.extend = function(base) {
- var len = arguments.length;
- var additionalArgs = [];
- for (var i = 1; i < len; i++) {
- additionalArgs.push(arguments[i]);
- }
- helpers.each(additionalArgs, function(extensionObject) {
- helpers.each(extensionObject, function(value, key) {
- if (extensionObject.hasOwnProperty(key)) {
- base[key] = value;
- }
- });
- });
- return base;
- };
- // Need a special merge function to chart configs since they are now grouped
- helpers.configMerge = function(_base) {
- var base = helpers.clone(_base);
- helpers.each(Array.prototype.slice.call(arguments, 1), function(extension) {
- helpers.each(extension, function(value, key) {
- if (extension.hasOwnProperty(key)) {
- if (key === 'scales') {
- // Scale config merging is complex. Add out own function here for that
- base[key] = helpers.scaleMerge(base.hasOwnProperty(key) ? base[key] : {}, value);
-
- } else if (key === 'scale') {
- // Used in polar area & radar charts since there is only one scale
- base[key] = helpers.configMerge(base.hasOwnProperty(key) ? base[key] : {}, Chart.scaleService.getScaleDefaults(value.type), value);
- } else if (base.hasOwnProperty(key) && helpers.isArray(base[key]) && helpers.isArray(value)) {
- // In this case we have an array of objects replacing another array. Rather than doing a strict replace,
- // merge. This allows easy scale option merging
- var baseArray = base[key];
-
- helpers.each(value, function(valueObj, index) {
-
- if (index < baseArray.length) {
- if (typeof baseArray[index] == 'object' && baseArray[index] !== null && typeof valueObj == 'object' && valueObj !== null) {
- // Two objects are coming together. Do a merge of them.
- baseArray[index] = helpers.configMerge(baseArray[index], valueObj);
- } else {
- // Just overwrite in this case since there is nothing to merge
- baseArray[index] = valueObj;
- }
- } else {
- baseArray.push(valueObj); // nothing to merge
- }
- });
-
- } else if (base.hasOwnProperty(key) && typeof base[key] == "object" && base[key] !== null && typeof value == "object") {
- // If we are overwriting an object with an object, do a merge of the properties.
- base[key] = helpers.configMerge(base[key], value);
-
- } else {
- // can just overwrite the value in this case
- base[key] = value;
- }
- }
- });
- });
-
- return base;
- };
- helpers.extendDeep = function(_base) {
- return _extendDeep.apply(this, arguments);
-
- function _extendDeep(dst) {
- helpers.each(arguments, function(obj) {
- if (obj !== dst) {
- helpers.each(obj, function(value, key) {
- if (dst[key] && dst[key].constructor && dst[key].constructor === Object) {
- _extendDeep(dst[key], value);
- } else {
- dst[key] = value;
- }
- });
- }
- });
- return dst;
- }
- };
- helpers.scaleMerge = function(_base, extension) {
- var base = helpers.clone(_base);
-
- helpers.each(extension, function(value, key) {
- if (extension.hasOwnProperty(key)) {
- if (key === 'xAxes' || key === 'yAxes') {
- // These properties are arrays of items
- if (base.hasOwnProperty(key)) {
- helpers.each(value, function(valueObj, index) {
- if (index >= base[key].length || !base[key][index].type) {
- base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
- } else if (valueObj.type !== base[key][index].type) {
- // Type changed. Bring in the new defaults before we bring in valueObj so that valueObj can override the correct scale defaults
- base[key][index] = helpers.configMerge(base[key][index], valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj);
- } else {
- // Type is the same
- base[key][index] = helpers.configMerge(base[key][index], valueObj);
- }
- });
- } else {
- base[key] = [];
- helpers.each(value, function(valueObj) {
- base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
- });
- }
- } else if (base.hasOwnProperty(key) && typeof base[key] == "object" && base[key] !== null && typeof value == "object") {
- // If we are overwriting an object with an object, do a merge of the properties.
- base[key] = helpers.configMerge(base[key], value);
-
- } else {
- // can just overwrite the value in this case
- base[key] = value;
- }
- }
- });
-
- return base;
- };
- helpers.getValueAtIndexOrDefault = function(value, index, defaultValue) {
- if (value === undefined || value === null) {
- return defaultValue;
- }
-
- if (helpers.isArray(value)) {
- return index < value.length ? value[index] : defaultValue;
- }
-
- return value;
- };
- helpers.getValueOrDefault = function(value, defaultValue) {
- return value === undefined ? defaultValue : value;
- };
- helpers.indexOf = function(arrayToSearch, item) {
- if (Array.prototype.indexOf) {
- return arrayToSearch.indexOf(item);
- } else {
- for (var i = 0; i < arrayToSearch.length; i++) {
- if (arrayToSearch[i] === item)
- return i;
- }
- return -1;
- }
- };
- helpers.where = function(collection, filterCallback) {
- var filtered = [];
-
- helpers.each(collection, function(item) {
- if (filterCallback(item)) {
- filtered.push(item);
- }
- });
-
- return filtered;
- };
- helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex) {
- // Default to start of the array
- if (startIndex === undefined || startIndex === null) {
- startIndex = -1;
- }
- for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
- var currentItem = arrayToSearch[i];
- if (filterCallback(currentItem)) {
- return currentItem;
- }
- }
- };
- helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex) {
- // Default to end of the array
- if (startIndex === undefined || startIndex === null) {
- startIndex = arrayToSearch.length;
- }
- for (var i = startIndex - 1; i >= 0; i--) {
- var currentItem = arrayToSearch[i];
- if (filterCallback(currentItem)) {
- return currentItem;
- }
- }
- };
- helpers.inherits = function(extensions) {
- //Basic javascript inheritance based on the model created in Backbone.js
- var parent = this;
- var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function() {
- return parent.apply(this, arguments);
- };
-
- var Surrogate = function() {
- this.constructor = ChartElement;
- };
- Surrogate.prototype = parent.prototype;
- ChartElement.prototype = new Surrogate();
-
- ChartElement.extend = helpers.inherits;
-
- if (extensions) {
- helpers.extend(ChartElement.prototype, extensions);
- }
-
- ChartElement.__super__ = parent.prototype;
-
- return ChartElement;
- };
- helpers.noop = function() {};
- helpers.uid = (function() {
- var id = 0;
- return function() {
- return "chart-" + id++;
- };
- })();
- helpers.warn = function(str) {
- //Method for warning of errors
- if (console && typeof console.warn === "function") {
- console.warn(str);
- }
- };
- //-- Math methods
- helpers.isNumber = function(n) {
- return !isNaN(parseFloat(n)) && isFinite(n);
- };
- helpers.almostEquals = function(x, y, epsilon) {
- return Math.abs(x - y) < epsilon;
- };
- helpers.max = function(array) {
- return array.reduce(function(max, value) {
- if (!isNaN(value)) {
- return Math.max(max, value);
- } else {
- return max;
- }
- }, Number.NEGATIVE_INFINITY);
- };
- helpers.min = function(array) {
- return array.reduce(function(min, value) {
- if (!isNaN(value)) {
- return Math.min(min, value);
- } else {
- return min;
- }
- }, Number.POSITIVE_INFINITY);
- };
- helpers.sign = function(x) {
- if (Math.sign) {
- return Math.sign(x);
- } else {
- x = +x; // convert to a number
- if (x === 0 || isNaN(x)) {
- return x;
- }
- return x > 0 ? 1 : -1;
- }
- };
- helpers.log10 = function(x) {
- if (Math.log10) {
- return Math.log10(x);
- } else {
- return Math.log(x) / Math.LN10;
- }
- };
- helpers.toRadians = function(degrees) {
- return degrees * (Math.PI / 180);
- };
- helpers.toDegrees = function(radians) {
- return radians * (180 / Math.PI);
- };
- // Gets the angle from vertical upright to the point about a centre.
- helpers.getAngleFromPoint = function(centrePoint, anglePoint) {
- var distanceFromXCenter = anglePoint.x - centrePoint.x,
- distanceFromYCenter = anglePoint.y - centrePoint.y,
- radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
-
- var angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);
-
- if (angle < (-0.5 * Math.PI)) {
- angle += 2.0 * Math.PI; // make sure the returned angle is in the range of (-PI/2, 3PI/2]
- }
-
- return {
- angle: angle,
- distance: radialDistanceFromCenter
- };
- };
- helpers.aliasPixel = function(pixelWidth) {
- return (pixelWidth % 2 === 0) ? 0 : 0.5;
- };
- helpers.splineCurve = function(firstPoint, middlePoint, afterPoint, t) {
- //Props to Rob Spencer at scaled innovation for his post on splining between points
- //http://scaledinnovation.com/analytics/splines/aboutSplines.html
-
- // This function must also respect "skipped" points
-
- var previous = firstPoint.skip ? middlePoint : firstPoint,
- current = middlePoint,
- next = afterPoint.skip ? middlePoint : afterPoint;
-
- var d01 = Math.sqrt(Math.pow(current.x - previous.x, 2) + Math.pow(current.y - previous.y, 2));
- var d12 = Math.sqrt(Math.pow(next.x - current.x, 2) + Math.pow(next.y - current.y, 2));
-
- var s01 = d01 / (d01 + d12);
- var s12 = d12 / (d01 + d12);
-
- // If all points are the same, s01 & s02 will be inf
- s01 = isNaN(s01) ? 0 : s01;
- s12 = isNaN(s12) ? 0 : s12;
-
- var fa = t * s01; // scaling factor for triangle Ta
- var fb = t * s12;
-
- return {
- previous: {
- x: current.x - fa * (next.x - previous.x),
- y: current.y - fa * (next.y - previous.y)
- },
- next: {
- x: current.x + fb * (next.x - previous.x),
- y: current.y + fb * (next.y - previous.y)
- }
- };
- };
- helpers.nextItem = function(collection, index, loop) {
- if (loop) {
- return index >= collection.length - 1 ? collection[0] : collection[index + 1];
- }
-
- return index >= collection.length - 1 ? collection[collection.length - 1] : collection[index + 1];
- };
- helpers.previousItem = function(collection, index, loop) {
- if (loop) {
- return index <= 0 ? collection[collection.length - 1] : collection[index - 1];
- }
- return index <= 0 ? collection[0] : collection[index - 1];
- };
- // Implementation of the nice number algorithm used in determining where axis labels will go
- helpers.niceNum = function(range, round) {
- var exponent = Math.floor(helpers.log10(range));
- var fraction = range / Math.pow(10, exponent);
- var niceFraction;
-
- if (round) {
- if (fraction < 1.5) {
- niceFraction = 1;
- } else if (fraction < 3) {
- niceFraction = 2;
- } else if (fraction < 7) {
- niceFraction = 5;
- } else {
- niceFraction = 10;
- }
- } else {
- if (fraction <= 1.0) {
- niceFraction = 1;
- } else if (fraction <= 2) {
- niceFraction = 2;
- } else if (fraction <= 5) {
- niceFraction = 5;
- } else {
- niceFraction = 10;
- }
- }
-
- return niceFraction * Math.pow(10, exponent);
- };
- //Easing functions adapted from Robert Penner's easing equations
- //http://www.robertpenner.com/easing/
- var easingEffects = helpers.easingEffects = {
- linear: function(t) {
- return t;
- },
- easeInQuad: function(t) {
- return t * t;
- },
- easeOutQuad: function(t) {
- return -1 * t * (t - 2);
- },
- easeInOutQuad: function(t) {
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * t * t;
- }
- return -1 / 2 * ((--t) * (t - 2) - 1);
- },
- easeInCubic: function(t) {
- return t * t * t;
- },
- easeOutCubic: function(t) {
- return 1 * ((t = t / 1 - 1) * t * t + 1);
- },
- easeInOutCubic: function(t) {
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * t * t * t;
- }
- return 1 / 2 * ((t -= 2) * t * t + 2);
- },
- easeInQuart: function(t) {
- return t * t * t * t;
- },
- easeOutQuart: function(t) {
- return -1 * ((t = t / 1 - 1) * t * t * t - 1);
- },
- easeInOutQuart: function(t) {
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * t * t * t * t;
- }
- return -1 / 2 * ((t -= 2) * t * t * t - 2);
- },
- easeInQuint: function(t) {
- return 1 * (t /= 1) * t * t * t * t;
- },
- easeOutQuint: function(t) {
- return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
- },
- easeInOutQuint: function(t) {
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * t * t * t * t * t;
- }
- return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
- },
- easeInSine: function(t) {
- return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
- },
- easeOutSine: function(t) {
- return 1 * Math.sin(t / 1 * (Math.PI / 2));
- },
- easeInOutSine: function(t) {
- return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
- },
- easeInExpo: function(t) {
- return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
- },
- easeOutExpo: function(t) {
- return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
- },
- easeInOutExpo: function(t) {
- if (t === 0) {
- return 0;
- }
- if (t === 1) {
- return 1;
- }
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * Math.pow(2, 10 * (t - 1));
- }
- return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
- },
- easeInCirc: function(t) {
- if (t >= 1) {
- return t;
- }
- return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
- },
- easeOutCirc: function(t) {
- return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
- },
- easeInOutCirc: function(t) {
- if ((t /= 1 / 2) < 1) {
- return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
- }
- return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
- },
- easeInElastic: function(t) {
- var s = 1.70158;
- var p = 0;
- var a = 1;
- if (t === 0) {
- return 0;
- }
- if ((t /= 1) == 1) {
- return 1;
- }
- if (!p) {
- p = 1 * 0.3;
- }
- if (a < Math.abs(1)) {
- a = 1;
- s = p / 4;
- } else {
- s = p / (2 * Math.PI) * Math.asin(1 / a);
- }
- return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
- },
- easeOutElastic: function(t) {
- var s = 1.70158;
- var p = 0;
- var a = 1;
- if (t === 0) {
- return 0;
- }
- if ((t /= 1) == 1) {
- return 1;
- }
- if (!p) {
- p = 1 * 0.3;
- }
- if (a < Math.abs(1)) {
- a = 1;
- s = p / 4;
- } else {
- s = p / (2 * Math.PI) * Math.asin(1 / a);
- }
- return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
- },
- easeInOutElastic: function(t) {
- var s = 1.70158;
- var p = 0;
- var a = 1;
- if (t === 0) {
- return 0;
- }
- if ((t /= 1 / 2) == 2) {
- return 1;
- }
- if (!p) {
- p = 1 * (0.3 * 1.5);
- }
- if (a < Math.abs(1)) {
- a = 1;
- s = p / 4;
- } else {
- s = p / (2 * Math.PI) * Math.asin(1 / a);
- }
- if (t < 1) {
- return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
- }
- return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
- },
- easeInBack: function(t) {
- var s = 1.70158;
- return 1 * (t /= 1) * t * ((s + 1) * t - s);
- },
- easeOutBack: function(t) {
- var s = 1.70158;
- return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
- },
- easeInOutBack: function(t) {
- var s = 1.70158;
- if ((t /= 1 / 2) < 1) {
- return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
- }
- return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
- },
- easeInBounce: function(t) {
- return 1 - easingEffects.easeOutBounce(1 - t);
- },
- easeOutBounce: function(t) {
- if ((t /= 1) < (1 / 2.75)) {
- return 1 * (7.5625 * t * t);
- } else if (t < (2 / 2.75)) {
- return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
- } else if (t < (2.5 / 2.75)) {
- return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
- } else {
- return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
- }
- },
- easeInOutBounce: function(t) {
- if (t < 1 / 2) {
- return easingEffects.easeInBounce(t * 2) * 0.5;
- }
- return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
- }
- };
- //Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
- helpers.requestAnimFrame = (function() {
- return window.requestAnimationFrame ||
- window.webkitRequestAnimationFrame ||
- window.mozRequestAnimationFrame ||
- window.oRequestAnimationFrame ||
- window.msRequestAnimationFrame ||
- function(callback) {
- return window.setTimeout(callback, 1000 / 60);
- };
- })();
- helpers.cancelAnimFrame = (function() {
- return window.cancelAnimationFrame ||
- window.webkitCancelAnimationFrame ||
- window.mozCancelAnimationFrame ||
- window.oCancelAnimationFrame ||
- window.msCancelAnimationFrame ||
- function(callback) {
- return window.clearTimeout(callback, 1000 / 60);
- };
- })();
- //-- DOM methods
- helpers.getRelativePosition = function(evt, chart) {
- var mouseX, mouseY;
- var e = evt.originalEvent || evt,
- canvas = evt.currentTarget || evt.srcElement,
- boundingRect = canvas.getBoundingClientRect();
-
- if (e.touches && e.touches.length > 0) {
- mouseX = e.touches[0].clientX;
- mouseY = e.touches[0].clientY;
-
- } else {
- mouseX = e.clientX;
- mouseY = e.clientY;
- }
-
- // Scale mouse coordinates into canvas coordinates
- // by following the pattern laid out by 'jerryj' in the comments of
- // http://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/
-
- // We divide by the current device pixel ratio, because the canvas is scaled up by that amount in each direction. However
- // the backend model is in unscaled coordinates. Since we are going to deal with our model coordinates, we go back here
- mouseX = Math.round((mouseX - boundingRect.left) / (boundingRect.right - boundingRect.left) * canvas.width / chart.currentDevicePixelRatio);
- mouseY = Math.round((mouseY - boundingRect.top) / (boundingRect.bottom - boundingRect.top) * canvas.height / chart.currentDevicePixelRatio);
-
- return {
- x: mouseX,
- y: mouseY
- };
-
- };
- helpers.addEvent = function(node, eventType, method) {
- if (node.addEventListener) {
- node.addEventListener(eventType, method);
- } else if (node.attachEvent) {
- node.attachEvent("on" + eventType, method);
- } else {
- node["on" + eventType] = method;
- }
- };
- helpers.removeEvent = function(node, eventType, handler) {
- if (node.removeEventListener) {
- node.removeEventListener(eventType, handler, false);
- } else if (node.detachEvent) {
- node.detachEvent("on" + eventType, handler);
- } else {
- node["on" + eventType] = helpers.noop;
- }
- };
- helpers.bindEvents = function(chartInstance, arrayOfEvents, handler) {
- // Create the events object if it's not already present
- if (!chartInstance.events)
- chartInstance.events = {};
-
- helpers.each(arrayOfEvents, function(eventName) {
- chartInstance.events[eventName] = function() {
- handler.apply(chartInstance, arguments);
- };
- helpers.addEvent(chartInstance.chart.canvas, eventName, chartInstance.events[eventName]);
- });
- };
- helpers.unbindEvents = function(chartInstance, arrayOfEvents) {
- helpers.each(arrayOfEvents, function(handler, eventName) {
- helpers.removeEvent(chartInstance.chart.canvas, eventName, handler);
- });
- };
- helpers.getConstraintWidth = function(domNode) { // returns Number or undefined if no constraint
- var constrainedWidth;
- var constrainedWNode = document.defaultView.getComputedStyle(domNode)['max-width'];
- var constrainedWContainer = document.defaultView.getComputedStyle(domNode.parentNode)['max-width'];
- var hasCWNode = constrainedWNode !== null && constrainedWNode !== "none";
- var hasCWContainer = constrainedWContainer !== null && constrainedWContainer !== "none";
-
- if (hasCWNode || hasCWContainer) {
- constrainedWidth = Math.min((hasCWNode ? parseInt(constrainedWNode, 10) : Number.POSITIVE_INFINITY), (hasCWContainer ? parseInt(constrainedWContainer, 10) : Number.POSITIVE_INFINITY));
- }
- return constrainedWidth;
- };
- // returns Number or undefined if no constraint
- helpers.getConstraintHeight = function(domNode) {
- var constrainedHeight;
- var constrainedHNode = document.defaultView.getComputedStyle(domNode)['max-height'];
- var constrainedHContainer = document.defaultView.getComputedStyle(domNode.parentNode)['max-height'];
- var hasCHNode = constrainedHNode !== null && constrainedHNode !== "none";
- var hasCHContainer = constrainedHContainer !== null && constrainedHContainer !== "none";
-
- if (constrainedHNode || constrainedHContainer) {
- constrainedHeight = Math.min((hasCHNode ? parseInt(constrainedHNode, 10) : Number.POSITIVE_INFINITY), (hasCHContainer ? parseInt(constrainedHContainer, 10) : Number.POSITIVE_INFINITY));
- }
- return constrainedHeight;
- };
- helpers.getMaximumWidth = function(domNode) {
- var container = domNode.parentNode;
- var padding = parseInt(helpers.getStyle(container, 'padding-left')) + parseInt(helpers.getStyle(container, 'padding-right'));
-
- var w = container.clientWidth - padding;
- var cw = helpers.getConstraintWidth(domNode);
- if (cw !== undefined) {
- w = Math.min(w, cw);
- }
-
- return w;
- };
- helpers.getMaximumHeight = function(domNode) {
- var container = domNode.parentNode;
- var padding = parseInt(helpers.getStyle(container, 'padding-top')) + parseInt(helpers.getStyle(container, 'padding-bottom'));
-
- var h = container.clientHeight - padding;
- var ch = helpers.getConstraintHeight(domNode);
- if (ch !== undefined) {
- h = Math.min(h, ch);
- }
-
- return h;
- };
- helpers.getStyle = function(el, property) {
- return el.currentStyle ?
- el.currentStyle[property] :
- document.defaultView.getComputedStyle(el, null).getPropertyValue(property);
- };
- helpers.retinaScale = function(chart) {
- var ctx = chart.ctx;
- var width = chart.canvas.width;
- var height = chart.canvas.height;
- var pixelRatio = chart.currentDevicePixelRatio = window.devicePixelRatio || 1;
-
- if (pixelRatio !== 1) {
- ctx.canvas.height = height * pixelRatio;
- ctx.canvas.width = width * pixelRatio;
- ctx.scale(pixelRatio, pixelRatio);
-
- ctx.canvas.style.width = width + 'px';
- ctx.canvas.style.height = height + 'px';
-
- // Store the device pixel ratio so that we can go backwards in `destroy`.
- // The devicePixelRatio changes with zoom, so there are no guarantees that it is the same
- // when destroy is called
- chart.originalDevicePixelRatio = chart.originalDevicePixelRatio || pixelRatio;
- }
- };
- //-- Canvas methods
- helpers.clear = function(chart) {
- chart.ctx.clearRect(0, 0, chart.width, chart.height);
- };
- helpers.fontString = function(pixelSize, fontStyle, fontFamily) {
- return fontStyle + " " + pixelSize + "px " + fontFamily;
- };
- helpers.longestText = function(ctx, font, arrayOfStrings, cache) {
- cache = cache || {};
- cache.data = cache.data || {};
- cache.garbageCollect = cache.garbageCollect || [];
-
- if (cache.font !== font) {
- cache.data = {};
- cache.garbageCollect = [];
- cache.font = font;
- }
-
- ctx.font = font;
- var longest = 0;
- helpers.each(arrayOfStrings, function(string) {
- var textWidth = cache.data[string];
- if (!textWidth) {
- textWidth = cache.data[string] = ctx.measureText(string).width;
- cache.garbageCollect.push(string);
- }
- if (textWidth > longest)
- longest = textWidth;
- });
-
- var gcLen = cache.garbageCollect.length / 2;
- if (gcLen > arrayOfStrings.length) {
- for (var i = 0; i < gcLen; i++) {
- var key = cache.garbageCollect.shift();
- delete cache.data[key];
- }
- }
-
- return longest;
- };
- helpers.drawRoundedRectangle = function(ctx, x, y, width, height, radius) {
- ctx.beginPath();
- ctx.moveTo(x + radius, y);
- ctx.lineTo(x + width - radius, y);
- ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
- ctx.lineTo(x + width, y + height - radius);
- ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
- ctx.lineTo(x + radius, y + height);
- ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
- ctx.lineTo(x, y + radius);
- ctx.quadraticCurveTo(x, y, x + radius, y);
- ctx.closePath();
- };
- helpers.color = function(c) {
- if (!color) {
- console.log('Color.js not found!');
- return c;
- }
- return color(c);
- };
- helpers.addResizeListener = function(node, callback) {
- // Hide an iframe before the node
- var hiddenIframe = document.createElement('iframe');
- var hiddenIframeClass = 'chartjs-hidden-iframe';
-
- if (hiddenIframe.classlist) {
- // can use classlist
- hiddenIframe.classlist.add(hiddenIframeClass);
- } else {
- hiddenIframe.setAttribute('class', hiddenIframeClass);
- }
-
- // Set the style
- hiddenIframe.style.width = '100%';
- hiddenIframe.style.display = 'block';
- hiddenIframe.style.border = 0;
- hiddenIframe.style.height = 0;
- hiddenIframe.style.margin = 0;
- hiddenIframe.style.position = 'absolute';
- hiddenIframe.style.left = 0;
- hiddenIframe.style.right = 0;
- hiddenIframe.style.top = 0;
- hiddenIframe.style.bottom = 0;
-
- // Insert the iframe so that contentWindow is available
- node.insertBefore(hiddenIframe, node.firstChild);
-
- (hiddenIframe.contentWindow || hiddenIframe).onresize = function() {
- if (callback) {
- callback();
- }
- };
- };
- helpers.removeResizeListener = function(node) {
- var hiddenIframe = node.querySelector('.chartjs-hidden-iframe');
-
- // Remove the resize detect iframe
- if (hiddenIframe) {
- hiddenIframe.parentNode.removeChild(hiddenIframe);
- }
- };
- helpers.isArray = function(obj) {
- if (!Array.isArray) {
- return Object.prototype.toString.call(obj) === '[object Array]';
- }
- return Array.isArray(obj);
- };
- helpers.pushAllIfDefined = function(element, array) {
- if (typeof element == "undefined") {
- return;
- }
-
- if (helpers.isArray(element)) {
- array.push.apply(array, element);
- } else {
- array.push(element);
- }
- };
- helpers.isDatasetVisible = function(dataset) {
- return !dataset.hidden;
- };
- helpers.callCallback = function(fn, args, _tArg) {
- if (fn && typeof fn.call === 'function') {
- fn.apply(_tArg, args);
- }
- };
-
-};
+ //Global Chart helpers object for utility methods and classes
+ var helpers = Chart.helpers = {};
+
+ //-- Basic js utility methods
+ helpers.each = function(loopable, callback, self, reverse) {
+ // Check to see if null or undefined firstly.
+ var i, len;
+ if (helpers.isArray(loopable)) {
+ len = loopable.length;
+ if (reverse) {
+ for (i = len - 1; i >= 0; i--) {
+ callback.call(self, loopable[i], i);
+ }
+ } else {
+ for (i = 0; i < len; i++) {
+ callback.call(self, loopable[i], i);
+ }
+ }
+ } else if (typeof loopable === 'object') {
+ var keys = Object.keys(loopable);
+ len = keys.length;
+ for (i = 0; i < len; i++) {
+ callback.call(self, loopable[keys[i]], keys[i]);
+ }
+ }
+ };
+ helpers.clone = function(obj) {
+ var objClone = {};
+ helpers.each(obj, function(value, key) {
+ if (obj.hasOwnProperty(key)) {
+ if (helpers.isArray(value)) {
+ objClone[key] = value.slice(0);
+ } else if (typeof value === 'object' && value !== null) {
+ objClone[key] = helpers.clone(value);
+ } else {
+ objClone[key] = value;
+ }
+ }
+ });
+ return objClone;
+ };
+ helpers.extend = function(base) {
+ var len = arguments.length;
+ var additionalArgs = [];
+ for (var i = 1; i < len; i++) {
+ additionalArgs.push(arguments[i]);
+ }
+ helpers.each(additionalArgs, function(extensionObject) {
+ helpers.each(extensionObject, function(value, key) {
+ if (extensionObject.hasOwnProperty(key)) {
+ base[key] = value;
+ }
+ });
+ });
+ return base;
+ };
+ // Need a special merge function to chart configs since they are now grouped
+ helpers.configMerge = function(_base) {
+ var base = helpers.clone(_base);
+ helpers.each(Array.prototype.slice.call(arguments, 1), function(extension) {
+ helpers.each(extension, function(value, key) {
+ if (extension.hasOwnProperty(key)) {
+ if (key === 'scales') {
+ // Scale config merging is complex. Add out own function here for that
+ base[key] = helpers.scaleMerge(base.hasOwnProperty(key) ? base[key] : {}, value);
+
+ } else if (key === 'scale') {
+ // Used in polar area & radar charts since there is only one scale
+ base[key] = helpers.configMerge(base.hasOwnProperty(key) ? base[key] : {}, Chart.scaleService.getScaleDefaults(value.type), value);
+ } else if (base.hasOwnProperty(key) && helpers.isArray(base[key]) && helpers.isArray(value)) {
+ // In this case we have an array of objects replacing another array. Rather than doing a strict replace,
+ // merge. This allows easy scale option merging
+ var baseArray = base[key];
+
+ helpers.each(value, function(valueObj, index) {
+
+ if (index < baseArray.length) {
+ if (typeof baseArray[index] === 'object' && baseArray[index] !== null && typeof valueObj === 'object' && valueObj !== null) {
+ // Two objects are coming together. Do a merge of them.
+ baseArray[index] = helpers.configMerge(baseArray[index], valueObj);
+ } else {
+ // Just overwrite in this case since there is nothing to merge
+ baseArray[index] = valueObj;
+ }
+ } else {
+ baseArray.push(valueObj); // nothing to merge
+ }
+ });
+
+ } else if (base.hasOwnProperty(key) && typeof base[key] === "object" && base[key] !== null && typeof value === "object") {
+ // If we are overwriting an object with an object, do a merge of the properties.
+ base[key] = helpers.configMerge(base[key], value);
+
+ } else {
+ // can just overwrite the value in this case
+ base[key] = value;
+ }
+ }
+ });
+ });
+
+ return base;
+ };
+ helpers.extendDeep = function(_base) {
+ return _extendDeep.apply(this, arguments);
+
+ function _extendDeep(dst) {
+ helpers.each(arguments, function(obj) {
+ if (obj !== dst) {
+ helpers.each(obj, function(value, key) {
+ if (dst[key] && dst[key].constructor && dst[key].constructor === Object) {
+ _extendDeep(dst[key], value);
+ } else {
+ dst[key] = value;
+ }
+ });
+ }
+ });
+ return dst;
+ }
+ };
+ helpers.scaleMerge = function(_base, extension) {
+ var base = helpers.clone(_base);
+
+ helpers.each(extension, function(value, key) {
+ if (extension.hasOwnProperty(key)) {
+ if (key === 'xAxes' || key === 'yAxes') {
+ // These properties are arrays of items
+ if (base.hasOwnProperty(key)) {
+ helpers.each(value, function(valueObj, index) {
+ if (index >= base[key].length || !base[key][index].type) {
+ base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
+ } else if (valueObj.type !== base[key][index].type) {
+ // Type changed. Bring in the new defaults before we bring in valueObj so that valueObj can override the correct scale defaults
+ base[key][index] = helpers.configMerge(base[key][index], valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj);
+ } else {
+ // Type is the same
+ base[key][index] = helpers.configMerge(base[key][index], valueObj);
+ }
+ });
+ } else {
+ base[key] = [];
+ helpers.each(value, function(valueObj) {
+ base[key].push(helpers.configMerge(valueObj.type ? Chart.scaleService.getScaleDefaults(valueObj.type) : {}, valueObj));
+ });
+ }
+ } else if (base.hasOwnProperty(key) && typeof base[key] === "object" && base[key] !== null && typeof value === "object") {
+ // If we are overwriting an object with an object, do a merge of the properties.
+ base[key] = helpers.configMerge(base[key], value);
+
+ } else {
+ // can just overwrite the value in this case
+ base[key] = value;
+ }
+ }
+ });
+
+ return base;
+ };
+ helpers.getValueAtIndexOrDefault = function(value, index, defaultValue) {
+ if (value === undefined || value === null) {
+ return defaultValue;
+ }
+
+ if (helpers.isArray(value)) {
+ return index < value.length ? value[index] : defaultValue;
+ }
+
+ return value;
+ };
+ helpers.getValueOrDefault = function(value, defaultValue) {
+ return value === undefined ? defaultValue : value;
+ };
+ helpers.indexOf = function(arrayToSearch, item) {
+ if (Array.prototype.indexOf) {
+ return arrayToSearch.indexOf(item);
+ } else {
+ for (var i = 0; i < arrayToSearch.length; i++) {
+ if (arrayToSearch[i] === item)
+ return i;
+ }
+ return -1;
+ }
+ };
+ helpers.where = function(collection, filterCallback) {
+ var filtered = [];
+
+ helpers.each(collection, function(item) {
+ if (filterCallback(item)) {
+ filtered.push(item);
+ }
+ });
+
+ return filtered;
+ };
+ helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex) {
+ // Default to start of the array
+ if (startIndex === undefined || startIndex === null) {
+ startIndex = -1;
+ }
+ for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
+ var currentItem = arrayToSearch[i];
+ if (filterCallback(currentItem)) {
+ return currentItem;
+ }
+ }
+ };
+ helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex) {
+ // Default to end of the array
+ if (startIndex === undefined || startIndex === null) {
+ startIndex = arrayToSearch.length;
+ }
+ for (var i = startIndex - 1; i >= 0; i--) {
+ var currentItem = arrayToSearch[i];
+ if (filterCallback(currentItem)) {
+ return currentItem;
+ }
+ }
+ };
+ helpers.inherits = function(extensions) {
+ //Basic javascript inheritance based on the model created in Backbone.js
+ var parent = this;
+ var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function() {
+ return parent.apply(this, arguments);
+ };
+
+ var Surrogate = function() {
+ this.constructor = ChartElement;
+ };
+ Surrogate.prototype = parent.prototype;
+ ChartElement.prototype = new Surrogate();
+
+ ChartElement.extend = helpers.inherits;
+
+ if (extensions) {
+ helpers.extend(ChartElement.prototype, extensions);
+ }
+
+ ChartElement.__super__ = parent.prototype;
+
+ return ChartElement;
+ };
+ helpers.noop = function() {};
+ helpers.uid = (function() {
+ var id = 0;
+ return function() {
+ return "chart-" + id++;
+ };
+ })();
+ helpers.warn = function(str) {
+ //Method for warning of errors
+ if (console && typeof console.warn === "function") {
+ console.warn(str);
+ }
+ };
+ //-- Math methods
+ helpers.isNumber = function(n) {
+ return !isNaN(parseFloat(n)) && isFinite(n);
+ };
+ helpers.almostEquals = function(x, y, epsilon) {
+ return Math.abs(x - y) < epsilon;
+ };
+ helpers.max = function(array) {
+ return array.reduce(function(max, value) {
+ if (!isNaN(value)) {
+ return Math.max(max, value);
+ } else {
+ return max;
+ }
+ }, Number.NEGATIVE_INFINITY);
+ };
+ helpers.min = function(array) {
+ return array.reduce(function(min, value) {
+ if (!isNaN(value)) {
+ return Math.min(min, value);
+ } else {
+ return min;
+ }
+ }, Number.POSITIVE_INFINITY);
+ };
+ helpers.sign = function(x) {
+ if (Math.sign) {
+ return Math.sign(x);
+ } else {
+ x = +x; // convert to a number
+ if (x === 0 || isNaN(x)) {
+ return x;
+ }
+ return x > 0 ? 1 : -1;
+ }
+ };
+ helpers.log10 = function(x) {
+ if (Math.log10) {
+ return Math.log10(x);
+ } else {
+ return Math.log(x) / Math.LN10;
+ }
+ };
+ helpers.toRadians = function(degrees) {
+ return degrees * (Math.PI / 180);
+ };
+ helpers.toDegrees = function(radians) {
+ return radians * (180 / Math.PI);
+ };
+ // Gets the angle from vertical upright to the point about a centre.
+ helpers.getAngleFromPoint = function(centrePoint, anglePoint) {
+ var distanceFromXCenter = anglePoint.x - centrePoint.x,
+ distanceFromYCenter = anglePoint.y - centrePoint.y,
+ radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
+
+ var angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);
+
+ if (angle < (-0.5 * Math.PI)) {
+ angle += 2.0 * Math.PI; // make sure the returned angle is in the range of (-PI/2, 3PI/2]
+ }
+
+ return {
+ angle: angle,
+ distance: radialDistanceFromCenter
+ };
+ };
+ helpers.aliasPixel = function(pixelWidth) {
+ return (pixelWidth % 2 === 0) ? 0 : 0.5;
+ };
+ helpers.splineCurve = function(firstPoint, middlePoint, afterPoint, t) {
+ //Props to Rob Spencer at scaled innovation for his post on splining between points
+ //http://scaledinnovation.com/analytics/splines/aboutSplines.html
+
+ // This function must also respect "skipped" points
+
+ var previous = firstPoint.skip ? middlePoint : firstPoint,
+ current = middlePoint,
+ next = afterPoint.skip ? middlePoint : afterPoint;
+
+ var d01 = Math.sqrt(Math.pow(current.x - previous.x, 2) + Math.pow(current.y - previous.y, 2));
+ var d12 = Math.sqrt(Math.pow(next.x - current.x, 2) + Math.pow(next.y - current.y, 2));
+
+ var s01 = d01 / (d01 + d12);
+ var s12 = d12 / (d01 + d12);
+
+ // If all points are the same, s01 & s02 will be inf
+ s01 = isNaN(s01) ? 0 : s01;
+ s12 = isNaN(s12) ? 0 : s12;
+
+ var fa = t * s01; // scaling factor for triangle Ta
+ var fb = t * s12;
+
+ return {
+ previous: {
+ x: current.x - fa * (next.x - previous.x),
+ y: current.y - fa * (next.y - previous.y)
+ },
+ next: {
+ x: current.x + fb * (next.x - previous.x),
+ y: current.y + fb * (next.y - previous.y)
+ }
+ };
+ };
+ helpers.nextItem = function(collection, index, loop) {
+ if (loop) {
+ return index >= collection.length - 1 ? collection[0] : collection[index + 1];
+ }
+
+ return index >= collection.length - 1 ? collection[collection.length - 1] : collection[index + 1];
+ };
+ helpers.previousItem = function(collection, index, loop) {
+ if (loop) {
+ return index <= 0 ? collection[collection.length - 1] : collection[index - 1];
+ }
+ return index <= 0 ? collection[0] : collection[index - 1];
+ };
+ // Implementation of the nice number algorithm used in determining where axis labels will go
+ helpers.niceNum = function(range, round) {
+ var exponent = Math.floor(helpers.log10(range));
+ var fraction = range / Math.pow(10, exponent);
+ var niceFraction;
+
+ if (round) {
+ if (fraction < 1.5) {
+ niceFraction = 1;
+ } else if (fraction < 3) {
+ niceFraction = 2;
+ } else if (fraction < 7) {
+ niceFraction = 5;
+ } else {
+ niceFraction = 10;
+ }
+ } else {
+ if (fraction <= 1.0) {
+ niceFraction = 1;
+ } else if (fraction <= 2) {
+ niceFraction = 2;
+ } else if (fraction <= 5) {
+ niceFraction = 5;
+ } else {
+ niceFraction = 10;
+ }
+ }
+
+ return niceFraction * Math.pow(10, exponent);
+ };
+ //Easing functions adapted from Robert Penner's easing equations
+ //http://www.robertpenner.com/easing/
+ var easingEffects = helpers.easingEffects = {
+ linear: function(t) {
+ return t;
+ },
+ easeInQuad: function(t) {
+ return t * t;
+ },
+ easeOutQuad: function(t) {
+ return -1 * t * (t - 2);
+ },
+ easeInOutQuad: function(t) {
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * t * t;
+ }
+ return -1 / 2 * ((--t) * (t - 2) - 1);
+ },
+ easeInCubic: function(t) {
+ return t * t * t;
+ },
+ easeOutCubic: function(t) {
+ return 1 * ((t = t / 1 - 1) * t * t + 1);
+ },
+ easeInOutCubic: function(t) {
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * t * t * t;
+ }
+ return 1 / 2 * ((t -= 2) * t * t + 2);
+ },
+ easeInQuart: function(t) {
+ return t * t * t * t;
+ },
+ easeOutQuart: function(t) {
+ return -1 * ((t = t / 1 - 1) * t * t * t - 1);
+ },
+ easeInOutQuart: function(t) {
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * t * t * t * t;
+ }
+ return -1 / 2 * ((t -= 2) * t * t * t - 2);
+ },
+ easeInQuint: function(t) {
+ return 1 * (t /= 1) * t * t * t * t;
+ },
+ easeOutQuint: function(t) {
+ return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
+ },
+ easeInOutQuint: function(t) {
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * t * t * t * t * t;
+ }
+ return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
+ },
+ easeInSine: function(t) {
+ return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
+ },
+ easeOutSine: function(t) {
+ return 1 * Math.sin(t / 1 * (Math.PI / 2));
+ },
+ easeInOutSine: function(t) {
+ return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
+ },
+ easeInExpo: function(t) {
+ return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
+ },
+ easeOutExpo: function(t) {
+ return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
+ },
+ easeInOutExpo: function(t) {
+ if (t === 0) {
+ return 0;
+ }
+ if (t === 1) {
+ return 1;
+ }
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * Math.pow(2, 10 * (t - 1));
+ }
+ return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
+ },
+ easeInCirc: function(t) {
+ if (t >= 1) {
+ return t;
+ }
+ return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
+ },
+ easeOutCirc: function(t) {
+ return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
+ },
+ easeInOutCirc: function(t) {
+ if ((t /= 1 / 2) < 1) {
+ return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
+ }
+ return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
+ },
+ easeInElastic: function(t) {
+ var s = 1.70158;
+ var p = 0;
+ var a = 1;
+ if (t === 0) {
+ return 0;
+ }
+ if ((t /= 1) === 1) {
+ return 1;
+ }
+ if (!p) {
+ p = 1 * 0.3;
+ }
+ if (a < Math.abs(1)) {
+ a = 1;
+ s = p / 4;
+ } else {
+ s = p / (2 * Math.PI) * Math.asin(1 / a);
+ }
+ return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
+ },
+ easeOutElastic: function(t) {
+ var s = 1.70158;
+ var p = 0;
+ var a = 1;
+ if (t === 0) {
+ return 0;
+ }
+ if ((t /= 1) === 1) {
+ return 1;
+ }
+ if (!p) {
+ p = 1 * 0.3;
+ }
+ if (a < Math.abs(1)) {
+ a = 1;
+ s = p / 4;
+ } else {
+ s = p / (2 * Math.PI) * Math.asin(1 / a);
+ }
+ return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
+ },
+ easeInOutElastic: function(t) {
+ var s = 1.70158;
+ var p = 0;
+ var a = 1;
+ if (t === 0) {
+ return 0;
+ }
+ if ((t /= 1 / 2) === 2) {
+ return 1;
+ }
+ if (!p) {
+ p = 1 * (0.3 * 1.5);
+ }
+ if (a < Math.abs(1)) {
+ a = 1;
+ s = p / 4;
+ } else {
+ s = p / (2 * Math.PI) * Math.asin(1 / a);
+ }
+ if (t < 1) {
+ return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
+ }
+ return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
+ },
+ easeInBack: function(t) {
+ var s = 1.70158;
+ return 1 * (t /= 1) * t * ((s + 1) * t - s);
+ },
+ easeOutBack: function(t) {
+ var s = 1.70158;
+ return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
+ },
+ easeInOutBack: function(t) {
+ var s = 1.70158;
+ if ((t /= 1 / 2) < 1) {
+ return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
+ }
+ return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
+ },
+ easeInBounce: function(t) {
+ return 1 - easingEffects.easeOutBounce(1 - t);
+ },
+ easeOutBounce: function(t) {
+ if ((t /= 1) < (1 / 2.75)) {
+ return 1 * (7.5625 * t * t);
+ } else if (t < (2 / 2.75)) {
+ return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
+ } else if (t < (2.5 / 2.75)) {
+ return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
+ } else {
+ return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
+ }
+ },
+ easeInOutBounce: function(t) {
+ if (t < 1 / 2) {
+ return easingEffects.easeInBounce(t * 2) * 0.5;
+ }
+ return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
+ }
+ };
+ //Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
+ helpers.requestAnimFrame = (function() {
+ return window.requestAnimationFrame ||
+ window.webkitRequestAnimationFrame ||
+ window.mozRequestAnimationFrame ||
+ window.oRequestAnimationFrame ||
+ window.msRequestAnimationFrame ||
+ function(callback) {
+ return window.setTimeout(callback, 1000 / 60);
+ };
+ })();
+ helpers.cancelAnimFrame = (function() {
+ return window.cancelAnimationFrame ||
+ window.webkitCancelAnimationFrame ||
+ window.mozCancelAnimationFrame ||
+ window.oCancelAnimationFrame ||
+ window.msCancelAnimationFrame ||
+ function(callback) {
+ return window.clearTimeout(callback, 1000 / 60);
+ };
+ })();
+ //-- DOM methods
+ helpers.getRelativePosition = function(evt, chart) {
+ var mouseX, mouseY;
+ var e = evt.originalEvent || evt,
+ canvas = evt.currentTarget || evt.srcElement,
+ boundingRect = canvas.getBoundingClientRect();
+
+ if (e.touches && e.touches.length > 0) {
+ mouseX = e.touches[0].clientX;
+ mouseY = e.touches[0].clientY;
+
+ } else {
+ mouseX = e.clientX;
+ mouseY = e.clientY;
+ }
+
+ // Scale mouse coordinates into canvas coordinates
+ // by following the pattern laid out by 'jerryj' in the comments of
+ // http://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/
+
+ // We divide by the current device pixel ratio, because the canvas is scaled up by that amount in each direction. However
+ // the backend model is in unscaled coordinates. Since we are going to deal with our model coordinates, we go back here
+ mouseX = Math.round((mouseX - boundingRect.left) / (boundingRect.right - boundingRect.left) * canvas.width / chart.currentDevicePixelRatio);
+ mouseY = Math.round((mouseY - boundingRect.top) / (boundingRect.bottom - boundingRect.top) * canvas.height / chart.currentDevicePixelRatio);
+
+ return {
+ x: mouseX,
+ y: mouseY
+ };
+
+ };
+ helpers.addEvent = function(node, eventType, method) {
+ if (node.addEventListener) {
+ node.addEventListener(eventType, method);
+ } else if (node.attachEvent) {
+ node.attachEvent("on" + eventType, method);
+ } else {
+ node["on" + eventType] = method;
+ }
+ };
+ helpers.removeEvent = function(node, eventType, handler) {
+ if (node.removeEventListener) {
+ node.removeEventListener(eventType, handler, false);
+ } else if (node.detachEvent) {
+ node.detachEvent("on" + eventType, handler);
+ } else {
+ node["on" + eventType] = helpers.noop;
+ }
+ };
+ helpers.bindEvents = function(chartInstance, arrayOfEvents, handler) {
+ // Create the events object if it's not already present
+ if (!chartInstance.events)
+ chartInstance.events = {};
+
+ helpers.each(arrayOfEvents, function(eventName) {
+ chartInstance.events[eventName] = function() {
+ handler.apply(chartInstance, arguments);
+ };
+ helpers.addEvent(chartInstance.chart.canvas, eventName, chartInstance.events[eventName]);
+ });
+ };
+ helpers.unbindEvents = function(chartInstance, arrayOfEvents) {
+ helpers.each(arrayOfEvents, function(handler, eventName) {
+ helpers.removeEvent(chartInstance.chart.canvas, eventName, handler);
+ });
+ };
+ helpers.getConstraintWidth = function(domNode) { // returns Number or undefined if no constraint
+ var constrainedWidth;
+ var constrainedWNode = document.defaultView.getComputedStyle(domNode)['max-width'];
+ var constrainedWContainer = document.defaultView.getComputedStyle(domNode.parentNode)['max-width'];
+ var hasCWNode = constrainedWNode !== null && constrainedWNode !== "none";
+ var hasCWContainer = constrainedWContainer !== null && constrainedWContainer !== "none";
+
+ if (hasCWNode || hasCWContainer) {
+ constrainedWidth = Math.min((hasCWNode ? parseInt(constrainedWNode, 10) : Number.POSITIVE_INFINITY), (hasCWContainer ? parseInt(constrainedWContainer, 10) : Number.POSITIVE_INFINITY));
+ }
+ return constrainedWidth;
+ };
+ // returns Number or undefined if no constraint
+ helpers.getConstraintHeight = function(domNode) {
+ var constrainedHeight;
+ var constrainedHNode = document.defaultView.getComputedStyle(domNode)['max-height'];
+ var constrainedHContainer = document.defaultView.getComputedStyle(domNode.parentNode)['max-height'];
+ var hasCHNode = constrainedHNode !== null && constrainedHNode !== "none";
+ var hasCHContainer = constrainedHContainer !== null && constrainedHContainer !== "none";
+
+ if (constrainedHNode || constrainedHContainer) {
+ constrainedHeight = Math.min((hasCHNode ? parseInt(constrainedHNode, 10) : Number.POSITIVE_INFINITY), (hasCHContainer ? parseInt(constrainedHContainer, 10) : Number.POSITIVE_INFINITY));
+ }
+ return constrainedHeight;
+ };
+ helpers.getMaximumWidth = function(domNode) {
+ var container = domNode.parentNode;
+ var padding = parseInt(helpers.getStyle(container, 'padding-left')) + parseInt(helpers.getStyle(container, 'padding-right'));
+
+ var w = container.clientWidth - padding;
+ var cw = helpers.getConstraintWidth(domNode);
+ if (cw !== undefined) {
+ w = Math.min(w, cw);
+ }
+
+ return w;
+ };
+ helpers.getMaximumHeight = function(domNode) {
+ var container = domNode.parentNode;
+ var padding = parseInt(helpers.getStyle(container, 'padding-top')) + parseInt(helpers.getStyle(container, 'padding-bottom'));
+
+ var h = container.clientHeight - padding;
+ var ch = helpers.getConstraintHeight(domNode);
+ if (ch !== undefined) {
+ h = Math.min(h, ch);
+ }
+
+ return h;
+ };
+ helpers.getStyle = function(el, property) {
+ return el.currentStyle ?
+ el.currentStyle[property] :
+ document.defaultView.getComputedStyle(el, null).getPropertyValue(property);
+ };
+ helpers.retinaScale = function(chart) {
+ var ctx = chart.ctx;
+ var width = chart.canvas.width;
+ var height = chart.canvas.height;
+ var pixelRatio = chart.currentDevicePixelRatio = window.devicePixelRatio || 1;
+
+ if (pixelRatio !== 1) {
+ ctx.canvas.height = height * pixelRatio;
+ ctx.canvas.width = width * pixelRatio;
+ ctx.scale(pixelRatio, pixelRatio);
+
+ ctx.canvas.style.width = width + 'px';
+ ctx.canvas.style.height = height + 'px';
+
+ // Store the device pixel ratio so that we can go backwards in `destroy`.
+ // The devicePixelRatio changes with zoom, so there are no guarantees that it is the same
+ // when destroy is called
+ chart.originalDevicePixelRatio = chart.originalDevicePixelRatio || pixelRatio;
+ }
+ };
+ //-- Canvas methods
+ helpers.clear = function(chart) {
+ chart.ctx.clearRect(0, 0, chart.width, chart.height);
+ };
+ helpers.fontString = function(pixelSize, fontStyle, fontFamily) {
+ return fontStyle + " " + pixelSize + "px " + fontFamily;
+ };
+ helpers.longestText = function(ctx, font, arrayOfStrings, cache) {
+ cache = cache || {};
+ cache.data = cache.data || {};
+ cache.garbageCollect = cache.garbageCollect || [];
+
+ if (cache.font !== font) {
+ cache.data = {};
+ cache.garbageCollect = [];
+ cache.font = font;
+ }
+
+ ctx.font = font;
+ var longest = 0;
+ helpers.each(arrayOfStrings, function(string) {
+ var textWidth = cache.data[string];
+ if (!textWidth) {
+ textWidth = cache.data[string] = ctx.measureText(string).width;
+ cache.garbageCollect.push(string);
+ }
+ if (textWidth > longest)
+ longest = textWidth;
+ });
+
+ var gcLen = cache.garbageCollect.length / 2;
+ if (gcLen > arrayOfStrings.length) {
+ for (var i = 0; i < gcLen; i++) {
+ var key = cache.garbageCollect.shift();
+ delete cache.data[key];
+ }
+ }
+
+ return longest;
+ };
+ helpers.drawRoundedRectangle = function(ctx, x, y, width, height, radius) {
+ ctx.beginPath();
+ ctx.moveTo(x + radius, y);
+ ctx.lineTo(x + width - radius, y);
+ ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
+ ctx.lineTo(x + width, y + height - radius);
+ ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
+ ctx.lineTo(x + radius, y + height);
+ ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
+ ctx.lineTo(x, y + radius);
+ ctx.quadraticCurveTo(x, y, x + radius, y);
+ ctx.closePath();
+ };
+ helpers.color = function(c) {
+ if (!color) {
+ console.log('Color.js not found!');
+ return c;
+ }
+ return color(c);
+ };
+ helpers.addResizeListener = function(node, callback) {
+ // Hide an iframe before the node
+ var hiddenIframe = document.createElement('iframe');
+ var hiddenIframeClass = 'chartjs-hidden-iframe';
+
+ if (hiddenIframe.classlist) {
+ // can use classlist
+ hiddenIframe.classlist.add(hiddenIframeClass);
+ } else {
+ hiddenIframe.setAttribute('class', hiddenIframeClass);
+ }
+
+ // Set the style
+ hiddenIframe.style.width = '100%';
+ hiddenIframe.style.display = 'block';
+ hiddenIframe.style.border = 0;
+ hiddenIframe.style.height = 0;
+ hiddenIframe.style.margin = 0;
+ hiddenIframe.style.position = 'absolute';
+ hiddenIframe.style.left = 0;
+ hiddenIframe.style.right = 0;
+ hiddenIframe.style.top = 0;
+ hiddenIframe.style.bottom = 0;
+
+ // Insert the iframe so that contentWindow is available
+ node.insertBefore(hiddenIframe, node.firstChild);
+
+ (hiddenIframe.contentWindow || hiddenIframe).onresize = function() {
+ if (callback) {
+ callback();
+ }
+ };
+ };
+ helpers.removeResizeListener = function(node) {
+ var hiddenIframe = node.querySelector('.chartjs-hidden-iframe');
+
+ // Remove the resize detect iframe
+ if (hiddenIframe) {
+ hiddenIframe.parentNode.removeChild(hiddenIframe);
+ }
+ };
+ helpers.isArray = function(obj) {
+ if (!Array.isArray) {
+ return Object.prototype.toString.call(obj) === '[object Array]';
+ }
+ return Array.isArray(obj);
+ };
+ helpers.pushAllIfDefined = function(element, array) {
+ if (typeof element === "undefined") {
+ return;
+ }
+
+ if (helpers.isArray(element)) {
+ array.push.apply(array, element);
+ } else {
+ array.push(element);
+ }
+ };
+ helpers.isDatasetVisible = function(dataset) {
+ return !dataset.hidden;
+ };
+ helpers.callCallback = function(fn, args, _tArg) {
+ if (fn && typeof fn.call === 'function') {
+ fn.apply(_tArg, args);
+ }
+ };
+
+};
\ No newline at end of file
module.exports = function() {
- //Occupy the global variable of Chart, and create a simple base class
- var Chart = function(context, config) {
- this.config = config;
-
- // Support a jQuery'd canvas element
- if (context.length && context[0].getContext) {
- context = context[0];
- }
-
- // Support a canvas domnode
- if (context.getContext) {
- context = context.getContext("2d");
- }
-
- this.ctx = context;
- this.canvas = context.canvas;
-
- // Figure out what the size of the chart will be.
- // If the canvas has a specified width and height, we use those else
- // we look to see if the canvas node has a CSS width and height.
- // If there is still no height, fill the parent container
- this.width = context.canvas.width || parseInt(Chart.helpers.getStyle(context.canvas, 'width')) || Chart.helpers.getMaximumWidth(context.canvas);
- this.height = context.canvas.height || parseInt(Chart.helpers.getStyle(context.canvas, 'height')) || Chart.helpers.getMaximumHeight(context.canvas);
-
- this.aspectRatio = this.width / this.height;
-
- if (isNaN(this.aspectRatio) || isFinite(this.aspectRatio) === false) {
- // If the canvas has no size, try and figure out what the aspect ratio will be.
- // Some charts prefer square canvases (pie, radar, etc). If that is specified, use that
- // else use the canvas default ratio of 2
- this.aspectRatio = config.aspectRatio !== undefined ? config.aspectRatio : 2;
- }
-
- // Store the original style of the element so we can set it back
- this.originalCanvasStyleWidth = context.canvas.style.width;
- this.originalCanvasStyleHeight = context.canvas.style.height;
-
- // High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
- Chart.helpers.retinaScale(this);
-
- if (config) {
- this.controller = new Chart.Controller(this);
- }
-
- // Always bind this so that if the responsive state changes we still work
- var _this = this;
- Chart.helpers.addResizeListener(context.canvas.parentNode, function() {
- if (_this.controller && _this.controller.config.options.responsive) {
- _this.controller.resize();
- }
- });
-
- return this.controller ? this.controller : this;
-
- };
-
- //Globally expose the defaults to allow for user updating/changing
- Chart.defaults = {
- global: {
- responsive: true,
- responsiveAnimationDuration: 0,
- maintainAspectRatio: true,
- events: ["mousemove", "mouseout", "click", "touchstart", "touchmove"],
- hover: {
- onHover: null,
- mode: 'single',
- animationDuration: 400,
- },
- onClick: null,
- defaultColor: 'rgba(0,0,0,0.1)',
- defaultFontColor: '#666',
- defaultFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
- defaultFontSize: 12,
- defaultFontStyle: 'normal',
- showLines: true,
-
- // Element defaults defined in element extensions
- elements: {},
-
- // Legend callback string
- legendCallback: function(chart) {
- var text = [];
- text.push('<ul class="' + chart.id + '-legend">');
- for (var i = 0; i < chart.data.datasets.length; i++) {
- text.push('<li><span style="background-color:' + chart.data.datasets[i].backgroundColor + '">');
- if (chart.data.datasets[i].label) {
- text.push(chart.data.datasets[i].label);
- }
- text.push('</span></li>');
- }
- text.push('</ul>');
-
- return text.join("");
- }
- },
- };
+ //Occupy the global variable of Chart, and create a simple base class
+ var Chart = function(context, config) {
+ this.config = config;
+
+ // Support a jQuery'd canvas element
+ if (context.length && context[0].getContext) {
+ context = context[0];
+ }
+
+ // Support a canvas domnode
+ if (context.getContext) {
+ context = context.getContext("2d");
+ }
+
+ this.ctx = context;
+ this.canvas = context.canvas;
+
+ // Figure out what the size of the chart will be.
+ // If the canvas has a specified width and height, we use those else
+ // we look to see if the canvas node has a CSS width and height.
+ // If there is still no height, fill the parent container
+ this.width = context.canvas.width || parseInt(Chart.helpers.getStyle(context.canvas, 'width')) || Chart.helpers.getMaximumWidth(context.canvas);
+ this.height = context.canvas.height || parseInt(Chart.helpers.getStyle(context.canvas, 'height')) || Chart.helpers.getMaximumHeight(context.canvas);
+
+ this.aspectRatio = this.width / this.height;
+
+ if (isNaN(this.aspectRatio) || isFinite(this.aspectRatio) === false) {
+ // If the canvas has no size, try and figure out what the aspect ratio will be.
+ // Some charts prefer square canvases (pie, radar, etc). If that is specified, use that
+ // else use the canvas default ratio of 2
+ this.aspectRatio = config.aspectRatio !== undefined ? config.aspectRatio : 2;
+ }
+
+ // Store the original style of the element so we can set it back
+ this.originalCanvasStyleWidth = context.canvas.style.width;
+ this.originalCanvasStyleHeight = context.canvas.style.height;
+
+ // High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
+ Chart.helpers.retinaScale(this);
+
+ if (config) {
+ this.controller = new Chart.Controller(this);
+ }
+
+ // Always bind this so that if the responsive state changes we still work
+ var _this = this;
+ Chart.helpers.addResizeListener(context.canvas.parentNode, function() {
+ if (_this.controller && _this.controller.config.options.responsive) {
+ _this.controller.resize();
+ }
+ });
+
+ return this.controller ? this.controller : this;
+
+ };
+
+ //Globally expose the defaults to allow for user updating/changing
+ Chart.defaults = {
+ global: {
+ responsive: true,
+ responsiveAnimationDuration: 0,
+ maintainAspectRatio: true,
+ events: ["mousemove", "mouseout", "click", "touchstart", "touchmove"],
+ hover: {
+ onHover: null,
+ mode: 'single',
+ animationDuration: 400
+ },
+ onClick: null,
+ defaultColor: 'rgba(0,0,0,0.1)',
+ defaultFontColor: '#666',
+ defaultFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
+ defaultFontSize: 12,
+ defaultFontStyle: 'normal',
+ showLines: true,
+
+ // Element defaults defined in element extensions
+ elements: {},
+
+ // Legend callback string
+ legendCallback: function(chart) {
+ var text = [];
+
text.push('<ul class="' + chart.id + '-legend">');
+ for (var i = 0; i < chart.data.datasets.length; i++) {
+ text.push('<li><span style="background-color:' + chart.data.datasets[i].backgroundColor + '">');
+ if (chart.data.datasets[i].label) {
+ text.push(chart.data.datasets[i].label);
+ }
+ text.push('</span></li>');
+ }
+ text.push('</ul>');
+
+ return text.join("");
+ }
+ }
+ };
return Chart;
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- // The layout service is very self explanatory. It's responsible for the layout within a chart.
- // Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need
- // It is this service's responsibility of carrying out that layout.
- Chart.layoutService = {
- defaults: {},
-
- // Register a box to a chartInstance. A box is simply a reference to an object that requires layout. eg. Scales, Legend, Plugins.
- addBox: function(chartInstance, box) {
- if (!chartInstance.boxes) {
- chartInstance.boxes = [];
- }
- chartInstance.boxes.push(box);
- },
-
- removeBox: function(chartInstance, box) {
- if (!chartInstance.boxes) {
- return;
- }
- chartInstance.boxes.splice(chartInstance.boxes.indexOf(box), 1);
- },
-
- // The most important function
- update: function(chartInstance, width, height) {
-
- if (!chartInstance) {
- return;
- }
-
- var xPadding = width > 30 ? 5 : 2;
- var yPadding = height > 30 ? 5 : 2;
-
- var leftBoxes = helpers.where(chartInstance.boxes, function(box) {
- return box.options.position == "left";
- });
- var rightBoxes = helpers.where(chartInstance.boxes, function(box) {
- return box.options.position == "right";
- });
- var topBoxes = helpers.where(chartInstance.boxes, function(box) {
- return box.options.position == "top";
- });
- var bottomBoxes = helpers.where(chartInstance.boxes, function(box) {
- return box.options.position == "bottom";
- });
-
- // Boxes that overlay the chartarea such as the radialLinear scale
- var chartAreaBoxes = helpers.where(chartInstance.boxes, function(box) {
- return box.options.position == "chartArea";
- });
-
- function fullWidthSorter(a, b) {
-
- }
-
- // Ensure that full width boxes are at the very top / bottom
- topBoxes.sort(function(a, b) {
- return (b.options.fullWidth ? 1 : 0) - (a.options.fullWidth ? 1 : 0);
- });
- bottomBoxes.sort(function(a, b) {
- return (a.options.fullWidth ? 1 : 0) - (b.options.fullWidth ? 1 : 0);
- });
-
- // Essentially we now have any number of boxes on each of the 4 sides.
- // Our canvas looks like the following.
- // The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and
- // B1 is the bottom axis
- // There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays
- // These locations are single-box locations only, when trying to register a chartArea location that is already taken,
- // an error will be thrown.
- //
- // |----------------------------------------------------|
- // | T1 (Full Width) |
- // |----------------------------------------------------|
- // | | | T2 | |
- // | |----|-------------------------------------|----|
- // | | | C1 | | C2 | |
- // | | |----| |----| |
- // | | | | |
- // | L1 | L2 | ChartArea (C0) | R1 |
- // | | | | |
- // | | |----| |----| |
- // | | | C3 | | C4 | |
- // | |----|-------------------------------------|----|
- // | | | B1 | |
- // |----------------------------------------------------|
- // | B2 (Full Width) |
- // |----------------------------------------------------|
- //
- // What we do to find the best sizing, we do the following
- // 1. Determine the minimum size of the chart area.
- // 2. Split the remaining width equally between each vertical axis
- // 3. Split the remaining height equally between each horizontal axis
- // 4. Give each layout the maximum size it can be. The layout will return it's minimum size
- // 5. Adjust the sizes of each axis based on it's minimum reported size.
- // 6. Refit each axis
- // 7. Position each axis in the final location
- // 8. Tell the chart the final location of the chart area
- // 9. Tell any axes that overlay the chart area the positions of the chart area
-
- // Step 1
- var chartWidth = width - (2 * xPadding);
- var chartHeight = height - (2 * yPadding);
- var chartAreaWidth = chartWidth / 2; // min 50%
- var chartAreaHeight = chartHeight / 2; // min 50%
-
- // Step 2
- var verticalBoxWidth = (width - chartAreaWidth) / (leftBoxes.length + rightBoxes.length);
-
- // Step 3
- var horizontalBoxHeight = (height - chartAreaHeight) / (topBoxes.length + bottomBoxes.length);
-
- // Step 4
- var maxChartAreaWidth = chartWidth;
- var maxChartAreaHeight = chartHeight;
- var minBoxSizes = [];
-
- helpers.each(leftBoxes.concat(rightBoxes, topBoxes, bottomBoxes), getMinimumBoxSize);
-
- function getMinimumBoxSize(box) {
- var minSize;
- var isHorizontal = box.isHorizontal();
-
- if (isHorizontal) {
- minSize = box.update(box.options.fullWidth ? chartWidth : maxChartAreaWidth, horizontalBoxHeight);
- maxChartAreaHeight -= minSize.height;
- } else {
- minSize = box.update(verticalBoxWidth, chartAreaHeight);
- maxChartAreaWidth -= minSize.width;
- }
-
- minBoxSizes.push({
- horizontal: isHorizontal,
- minSize: minSize,
- box: box,
- });
- }
-
- // At this point, maxChartAreaHeight and maxChartAreaWidth are the size the chart area could
- // be if the axes are drawn at their minimum sizes.
-
- // Steps 5 & 6
- var totalLeftBoxesWidth = xPadding;
- var totalRightBoxesWidth = xPadding;
- var totalTopBoxesHeight = yPadding;
- var totalBottomBoxesHeight = yPadding;
-
- // Update, and calculate the left and right margins for the horizontal boxes
- helpers.each(leftBoxes.concat(rightBoxes), fitBox);
-
- helpers.each(leftBoxes, function(box) {
- totalLeftBoxesWidth += box.width;
- });
-
- helpers.each(rightBoxes, function(box) {
- totalRightBoxesWidth += box.width;
- });
-
- // Set the Left and Right margins for the horizontal boxes
- helpers.each(topBoxes.concat(bottomBoxes), fitBox);
-
- // Function to fit a box
- function fitBox(box) {
- var minBoxSize = helpers.findNextWhere(minBoxSizes, function(minBoxSize) {
- return minBoxSize.box === box;
- });
-
- if (minBoxSize) {
- if (box.isHorizontal()) {
- var scaleMargin = {
- left: totalLeftBoxesWidth,
- right: totalRightBoxesWidth,
- top: 0,
- bottom: 0,
- };
-
- // Don't use min size here because of label rotation. When the labels are rotated, their rotation highly depends
- // on the margin. Sometimes they need to increase in size slightly
- box.update(box.options.fullWidth ? chartWidth : maxChartAreaWidth, chartHeight / 2, scaleMargin);
- } else {
- box.update(minBoxSize.minSize.width, maxChartAreaHeight);
- }
- }
- }
-
- // Figure out how much margin is on the top and bottom of the vertical boxes
- helpers.each(topBoxes, function(box) {
- totalTopBoxesHeight += box.height;
- });
-
- helpers.each(bottomBoxes, function(box) {
- totalBottomBoxesHeight += box.height;
- });
-
- // Let the left layout know the final margin
- helpers.each(leftBoxes.concat(rightBoxes), finalFitVerticalBox);
-
- function finalFitVerticalBox(box) {
- var minBoxSize = helpers.findNextWhere(minBoxSizes, function(minBoxSize) {
- return minBoxSize.box === box;
- });
-
- var scaleMargin = {
- left: 0,
- right: 0,
- top: totalTopBoxesHeight,
- bottom: totalBottomBoxesHeight
- };
-
- if (minBoxSize) {
- box.update(minBoxSize.minSize.width, maxChartAreaHeight, scaleMargin);
- }
- }
-
- // Recalculate because the size of each layout might have changed slightly due to the margins (label rotation for instance)
- totalLeftBoxesWidth = xPadding;
- totalRightBoxesWidth = xPadding;
- totalTopBoxesHeight = yPadding;
- totalBottomBoxesHeight = yPadding;
-
- helpers.each(leftBoxes, function(box) {
- totalLeftBoxesWidth += box.width;
- });
-
- helpers.each(rightBoxes, function(box) {
- totalRightBoxesWidth += box.width;
- });
-
- helpers.each(topBoxes, function(box) {
- totalTopBoxesHeight += box.height;
- });
- helpers.each(bottomBoxes, function(box) {
- totalBottomBoxesHeight += box.height;
- });
-
- // Figure out if our chart area changed. This would occur if the dataset layout label rotation
- // changed due to the application of the margins in step 6. Since we can only get bigger, this is safe to do
- // without calling `fit` again
- var newMaxChartAreaHeight = height - totalTopBoxesHeight - totalBottomBoxesHeight;
- var newMaxChartAreaWidth = width - totalLeftBoxesWidth - totalRightBoxesWidth;
-
- if (newMaxChartAreaWidth !== maxChartAreaWidth || newMaxChartAreaHeight !== maxChartAreaHeight) {
- helpers.each(leftBoxes, function(box) {
- box.height = newMaxChartAreaHeight;
- });
-
- helpers.each(rightBoxes, function(box) {
- box.height = newMaxChartAreaHeight;
- });
-
- helpers.each(topBoxes, function(box) {
- box.width = newMaxChartAreaWidth;
- });
-
- helpers.each(bottomBoxes, function(box) {
- box.width = newMaxChartAreaWidth;
- });
-
- maxChartAreaHeight = newMaxChartAreaHeight;
- maxChartAreaWidth = newMaxChartAreaWidth;
- }
-
- // Step 7 - Position the boxes
- var left = xPadding;
- var top = yPadding;
- var right = 0;
- var bottom = 0;
-
- helpers.each(leftBoxes.concat(topBoxes), placeBox);
-
- // Account for chart width and height
- left += maxChartAreaWidth;
- top += maxChartAreaHeight;
-
- helpers.each(rightBoxes, placeBox);
- helpers.each(bottomBoxes, placeBox);
-
- function placeBox(box) {
- if (box.isHorizontal()) {
- box.left = box.options.fullWidth ? xPadding : totalLeftBoxesWidth;
- box.right = box.options.fullWidth ? width - xPadding : totalLeftBoxesWidth + maxChartAreaWidth;
- box.top = top;
- box.bottom = top + box.height;
-
- // Move to next point
- top = box.bottom;
-
- } else {
-
- box.left = left;
- box.right = left + box.width;
- box.top = totalTopBoxesHeight;
- box.bottom = totalTopBoxesHeight + maxChartAreaHeight;
-
- // Move to next point
- left = box.right;
- }
- }
-
- // Step 8
- chartInstance.chartArea = {
- left: totalLeftBoxesWidth,
- top: totalTopBoxesHeight,
- right: totalLeftBoxesWidth + maxChartAreaWidth,
- bottom: totalTopBoxesHeight + maxChartAreaHeight,
- };
-
- // Step 9
- helpers.each(chartAreaBoxes, function(box) {
- box.left = chartInstance.chartArea.left;
- box.top = chartInstance.chartArea.top;
- box.right = chartInstance.chartArea.right;
- box.bottom = chartInstance.chartArea.bottom;
-
- box.update(maxChartAreaWidth, maxChartAreaHeight);
- });
- }
- };
-};
+ var helpers = Chart.helpers;
+
+ // The layout service is very self explanatory. It's responsible for the layout within a chart.
+ // Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need
+ // It is this service's responsibility of carrying out that layout.
+ Chart.layoutService = {
+ defaults: {},
+
+ // Register a box to a chartInstance. A box is simply a reference to an object that requires layout. eg. Scales, Legend, Plugins.
+ addBox: function(chartInstance, box) {
+ if (!chartInstance.boxes) {
+ chartInstance.boxes = [];
+ }
+ chartInstance.boxes.push(box);
+ },
+
+ removeBox: function(chartInstance, box) {
+ if (!chartInstance.boxes) {
+ return;
+ }
+ chartInstance.boxes.splice(chartInstance.boxes.indexOf(box), 1);
+ },
+
+ // The most important function
+ update: function(chartInstance, width, height) {
+
+ if (!chartInstance) {
+ return;
+ }
+
+ var xPadding = width > 30 ? 5 : 2;
+ var yPadding = height > 30 ? 5 : 2;
+
+ var leftBoxes = helpers.where(chartInstance.boxes, function(box) {
+ return box.options.position === "left";
+ });
+ var rightBoxes = helpers.where(chartInstance.boxes, function(box) {
+ return box.options.position === "right";
+ });
+ var topBoxes = helpers.where(chartInstance.boxes, function(box) {
+ return box.options.position === "top";
+ });
+ var bottomBoxes = helpers.where(chartInstance.boxes, function(box) {
+ return box.options.position === "bottom";
+ });
+
+ // Boxes that overlay the chartarea such as the radialLinear scale
+ var chartAreaBoxes = helpers.where(chartInstance.boxes, function(box) {
+ return box.options.position === "chartArea";
+ });
+
+ function fullWidthSorter(a, b) {
+
+ }
+
+ // Ensure that full width boxes are at the very top / bottom
+ topBoxes.sort(function(a, b) {
+ return (b.options.fullWidth ? 1 : 0) - (a.options.fullWidth ? 1 : 0);
+ });
+ bottomBoxes.sort(function(a, b) {
+ return (a.options.fullWidth ? 1 : 0) - (b.options.fullWidth ? 1 : 0);
+ });
+
+ // Essentially we now have any number of boxes on each of the 4 sides.
+ // Our canvas looks like the following.
+ // The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and
+ // B1 is the bottom axis
+ // There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays
+ // These locations are single-box locations only, when trying to register a chartArea location that is already taken,
+ // an error will be thrown.
+ //
+ // |----------------------------------------------------|
+ // | T1 (Full Width) |
+ // |----------------------------------------------------|
+ // | | | T2 | |
+ // | |----|-------------------------------------|----|
+ // | | | C1 | | C2 | |
+ // | | |----| |----| |
+ // | | | | |
+ // | L1 | L2 | ChartArea (C0) | R1 |
+ // | | | | |
+ // | | |----| |----| |
+ // | | | C3 | | C4 | |
+ // | |----|-------------------------------------|----|
+ // | | | B1 | |
+ // |----------------------------------------------------|
+ // | B2 (Full Width) |
+ // |----------------------------------------------------|
+ //
+ // What we do to find the best sizing, we do the following
+ // 1. Determine the minimum size of the chart area.
+ // 2. Split the remaining width equally between each vertical axis
+ // 3. Split the remaining height equally between each horizontal axis
+ // 4. Give each layout the maximum size it can be. The layout will return it's minimum size
+ // 5. Adjust the sizes of each axis based on it's minimum reported size.
+ // 6. Refit each axis
+ // 7. Position each axis in the final location
+ // 8. Tell the chart the final location of the chart area
+ // 9. Tell any axes that overlay the chart area the positions of the chart area
+
+ // Step 1
+ var chartWidth = width - (2 * xPadding);
+ var chartHeight = height - (2 * yPadding);
+ var chartAreaWidth = chartWidth / 2; // min 50%
+ var chartAreaHeight = chartHeight / 2; // min 50%
+
+ // Step 2
+ var verticalBoxWidth = (width - chartAreaWidth) / (leftBoxes.length + rightBoxes.length);
+
+ // Step 3
+ var horizontalBoxHeight = (height - chartAreaHeight) / (topBoxes.length + bottomBoxes.length);
+
+ // Step 4
+ var maxChartAreaWidth = chartWidth;
+ var maxChartAreaHeight = chartHeight;
+ var minBoxSizes = [];
+
+ helpers.each(leftBoxes.concat(rightBoxes, topBoxes, bottomBoxes), getMinimumBoxSize);
+
+ function getMinimumBoxSize(box) {
+ var minSize;
+ var isHorizontal = box.isHorizontal();
+
+ if (isHorizontal) {
+ minSize = box.update(box.options.fullWidth ? chartWidth : maxChartAreaWidth, horizontalBoxHeight);
+ maxChartAreaHeight -= minSize.height;
+ } else {
+ minSize = box.update(verticalBoxWidth, chartAreaHeight);
+ maxChartAreaWidth -= minSize.width;
+ }
+
+ minBoxSizes.push({
+ horizontal: isHorizontal,
+ minSize: minSize,
+ box: box
+ });
+ }
+
+ // At this point, maxChartAreaHeight and maxChartAreaWidth are the size the chart area could
+ // be if the axes are drawn at their minimum sizes.
+
+ // Steps 5 & 6
+ var totalLeftBoxesWidth = xPadding;
+ var totalRightBoxesWidth = xPadding;
+ var totalTopBoxesHeight = yPadding;
+ var totalBottomBoxesHeight = yPadding;
+
+ // Update, and calculate the left and right margins for the horizontal boxes
+ helpers.each(leftBoxes.concat(rightBoxes), fitBox);
+
+ helpers.each(leftBoxes, function(box) {
+ totalLeftBoxesWidth += box.width;
+ });
+
+ helpers.each(rightBoxes, function(box) {
+ totalRightBoxesWidth += box.width;
+ });
+
+ // Set the Left and Right margins for the horizontal boxes
+ helpers.each(topBoxes.concat(bottomBoxes), fitBox);
+
+ // Function to fit a box
+ function fitBox(box) {
+ var minBoxSize = helpers.findNextWhere(minBoxSizes, function(minBoxSize) {
+ return minBoxSize.box === box;
+ });
+
+ if (minBoxSize) {
+ if (box.isHorizontal()) {
+ var scaleMargin = {
+ left: totalLeftBoxesWidth,
+ right: totalRightBoxesWidth,
+ top: 0,
+ bottom: 0
+ };
+
+ // Don't use min size here because of label rotation. When the labels are rotated, their rotation highly depends
+ // on the margin. Sometimes they need to increase in size slightly
+ box.update(box.options.fullWidth ? chartWidth : maxChartAreaWidth, chartHeight / 2, scaleMargin);
+ } else {
+ box.update(minBoxSize.minSize.width, maxChartAreaHeight);
+ }
+ }
+ }
+
+ // Figure out how much margin is on the top and bottom of the vertical boxes
+ helpers.each(topBoxes, function(box) {
+ totalTopBoxesHeight += box.height;
+ });
+
+ helpers.each(bottomBoxes, function(box) {
+ totalBottomBoxesHeight += box.height;
+ });
+
+ // Let the left layout know the final margin
+ helpers.each(leftBoxes.concat(rightBoxes), finalFitVerticalBox);
+
+ function finalFitVerticalBox(box) {
+ var minBoxSize = helpers.findNextWhere(minBoxSizes, function(minBoxSize) {
+ return minBoxSize.box === box;
+ });
+
+ var scaleMargin = {
+ left: 0,
+ right: 0,
+ top: totalTopBoxesHeight,
+ bottom: totalBottomBoxesHeight
+ };
+
+ if (minBoxSize) {
+ box.update(minBoxSize.minSize.width, maxChartAreaHeight, scaleMargin);
+ }
+ }
+
+ // Recalculate because the size of each layout might have changed slightly due to the margins (label rotation for instance)
+ totalLeftBoxesWidth = xPadding;
+ totalRightBoxesWidth = xPadding;
+ totalTopBoxesHeight = yPadding;
+ totalBottomBoxesHeight = yPadding;
+
+ helpers.each(leftBoxes, function(box) {
+ totalLeftBoxesWidth += box.width;
+ });
+
+ helpers.each(rightBoxes, function(box) {
+ totalRightBoxesWidth += box.width;
+ });
+
+ helpers.each(topBoxes, function(box) {
+ totalTopBoxesHeight += box.height;
+ });
+ helpers.each(bottomBoxes, function(box) {
+ totalBottomBoxesHeight += box.height;
+ });
+
+ // Figure out if our chart area changed. This would occur if the dataset layout label rotation
+ // changed due to the application of the margins in step 6. Since we can only get bigger, this is safe to do
+ // without calling `fit` again
+ var newMaxChartAreaHeight = height - totalTopBoxesHeight - totalBottomBoxesHeight;
+ var newMaxChartAreaWidth = width - totalLeftBoxesWidth - totalRightBoxesWidth;
+
+ if (newMaxChartAreaWidth !== maxChartAreaWidth || newMaxChartAreaHeight !== maxChartAreaHeight) {
+ helpers.each(leftBoxes, function(box) {
+ box.height = newMaxChartAreaHeight;
+ });
+
+ helpers.each(rightBoxes, function(box) {
+ box.height = newMaxChartAreaHeight;
+ });
+
+ helpers.each(topBoxes, function(box) {
+ box.width = newMaxChartAreaWidth;
+ });
+
+ helpers.each(bottomBoxes, function(box) {
+ box.width = newMaxChartAreaWidth;
+ });
+
+ maxChartAreaHeight = newMaxChartAreaHeight;
+ maxChartAreaWidth = newMaxChartAreaWidth;
+ }
+
+ // Step 7 - Position the boxes
+ var left = xPadding;
+ var top = yPadding;
+ var right = 0;
+ var bottom = 0;
+
+ helpers.each(leftBoxes.concat(topBoxes), placeBox);
+
+ // Account for chart width and height
+ left += maxChartAreaWidth;
+ top += maxChartAreaHeight;
+
+ helpers.each(rightBoxes, placeBox);
+ helpers.each(bottomBoxes, placeBox);
+
+ function placeBox(box) {
+ if (box.isHorizontal()) {
+ box.left = box.options.fullWidth ? xPadding : totalLeftBoxesWidth;
+ box.right = box.options.fullWidth ? width - xPadding : totalLeftBoxesWidth + maxChartAreaWidth;
+ box.top = top;
+ box.bottom = top + box.height;
+
+ // Move to next point
+ top = box.bottom;
+
+ } else {
+
+ box.left = left;
+ box.right = left + box.width;
+ box.top = totalTopBoxesHeight;
+ box.bottom = totalTopBoxesHeight + maxChartAreaHeight;
+
+ // Move to next point
+ left = box.right;
+ }
+ }
+
+ // Step 8
+ chartInstance.chartArea = {
+ left: totalLeftBoxesWidth,
+ top: totalTopBoxesHeight,
+ right: totalLeftBoxesWidth + maxChartAreaWidth,
+ bottom: totalTopBoxesHeight + maxChartAreaHeight
+ };
+
+ // Step 9
+ helpers.each(chartAreaBoxes, function(box) {
+ box.left = chartInstance.chartArea.left;
+ box.top = chartInstance.chartArea.top;
+ box.right = chartInstance.chartArea.right;
+ box.bottom = chartInstance.chartArea.bottom;
+
+ box.update(maxChartAreaWidth, maxChartAreaHeight);
+ });
+ }
+ };
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.legend = {
-
- display: true,
- position: 'top',
- fullWidth: true, // marks that this box should take the full width of the canvas (pushing down other boxes)
-
- // a callback that will handle
- onClick: function(e, legendItem) {
- var dataset = this.chart.data.datasets[legendItem.datasetIndex];
- dataset.hidden = !dataset.hidden;
-
- // We hid a dataset ... rerender the chart
- this.chart.update();
- },
-
- labels: {
- boxWidth: 40,
- fontSize: Chart.defaults.global.defaultFontSize,
- fontStyle: Chart.defaults.global.defaultFontStyle,
- fontColor: Chart.defaults.global.defaultFontColor,
- fontFamily: Chart.defaults.global.defaultFontFamily,
- padding: 10,
- // Generates labels shown in the legend
- // Valid properties to return:
- // text : text to display
- // fillStyle : fill of coloured box
- // strokeStyle: stroke of coloured box
- // hidden : if this legend item refers to a hidden item
- // lineCap : cap style for line
- // lineDash
- // lineDashOffset :
- // lineJoin :
- // lineWidth :
- generateLabels: function(data) {
- return data.datasets.map(function(dataset, i) {
- return {
- text: dataset.label,
- fillStyle: dataset.backgroundColor,
- hidden: dataset.hidden,
- lineCap: dataset.borderCapStyle,
- lineDash: dataset.borderDash,
- lineDashOffset: dataset.borderDashOffset,
- lineJoin: dataset.borderJoinStyle,
- lineWidth: dataset.borderWidth,
- strokeStyle: dataset.borderColor,
-
- // Below is extra data used for toggling the datasets
- datasetIndex: i
- };
- }, this);
- }
- },
- };
-
- Chart.Legend = Chart.Element.extend({
-
- initialize: function(config) {
- helpers.extend(this, config);
-
- // Contains hit boxes for each dataset (in dataset order)
- this.legendHitBoxes = [];
-
- // Are we in doughnut mode which has a different data type
- this.doughnutMode = false;
- },
-
- // These methods are ordered by lifecyle. Utilities then follow.
- // Any function defined here is inherited by all legend types.
- // Any function can be extended by the legend type
-
- beforeUpdate: helpers.noop,
- update: function(maxWidth, maxHeight, margins) {
-
- // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
- this.beforeUpdate();
-
- // Absorb the master measurements
- this.maxWidth = maxWidth;
- this.maxHeight = maxHeight;
- this.margins = margins;
-
- // Dimensions
- this.beforeSetDimensions();
- this.setDimensions();
- this.afterSetDimensions();
- // Labels
- this.beforeBuildLabels();
- this.buildLabels();
- this.afterBuildLabels();
-
- // Fit
- this.beforeFit();
- this.fit();
- this.afterFit();
- //
- this.afterUpdate();
-
- return this.minSize;
-
- },
- afterUpdate: helpers.noop,
-
- //
-
- beforeSetDimensions: helpers.noop,
- setDimensions: function() {
- // Set the unconstrained dimension before label rotation
- if (this.isHorizontal()) {
- // Reset position before calculating rotation
- this.width = this.maxWidth;
- this.left = 0;
- this.right = this.width;
- } else {
- this.height = this.maxHeight;
-
- // Reset position before calculating rotation
- this.top = 0;
- this.bottom = this.height;
- }
-
- // Reset padding
- this.paddingLeft = 0;
- this.paddingTop = 0;
- this.paddingRight = 0;
- this.paddingBottom = 0;
-
- // Reset minSize
- this.minSize = {
- width: 0,
- height: 0,
- };
- },
- afterSetDimensions: helpers.noop,
-
- //
-
- beforeBuildLabels: helpers.noop,
- buildLabels: function() {
- this.legendItems = this.options.labels.generateLabels.call(this, this.chart.data);
- },
- afterBuildLabels: helpers.noop,
-
- //
-
- beforeFit: helpers.noop,
- fit: function() {
-
- var ctx = this.ctx;
- var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
-
- // Reset hit boxes
- this.legendHitBoxes = [];
-
- // Width
- if (this.isHorizontal()) {
- this.minSize.width = this.maxWidth; // fill all the width
- } else {
- this.minSize.width = this.options.display ? 10 : 0;
- }
-
- // height
- if (this.isHorizontal()) {
- this.minSize.height = this.options.display ? 10 : 0;
- } else {
- this.minSize.height = this.maxHeight; // fill all the height
- }
-
- // Increase sizes here
- if (this.options.display) {
- if (this.isHorizontal()) {
- // Labels
-
- // Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one
- this.lineWidths = [0];
- var totalHeight = this.legendItems.length ? this.options.labels.fontSize + (this.options.labels.padding) : 0;
-
- ctx.textAlign = "left";
- ctx.textBaseline = 'top';
- ctx.font = labelFont;
-
- helpers.each(this.legendItems, function(legendItem, i) {
- var width = this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + ctx.measureText(legendItem.text).width;
- if (this.lineWidths[this.lineWidths.length - 1] + width >= this.width) {
- totalHeight += this.options.labels.fontSize + (this.options.labels.padding);
- this.lineWidths[this.lineWidths.length] = this.left;
- }
-
- // Store the hitbox width and height here. Final position will be updated in `draw`
- this.legendHitBoxes[i] = {
- left: 0,
- top: 0,
- width: width,
- height: this.options.labels.fontSize,
- };
-
- this.lineWidths[this.lineWidths.length - 1] += width + this.options.labels.padding;
- }, this);
-
- this.minSize.height += totalHeight;
-
- } else {
- // TODO vertical
- }
- }
-
- this.width = this.minSize.width;
- this.height = this.minSize.height;
-
- },
- afterFit: helpers.noop,
-
- // Shared Methods
- isHorizontal: function() {
- return this.options.position == "top" || this.options.position == "bottom";
- },
-
- // Actualy draw the legend on the canvas
- draw: function() {
- if (this.options.display) {
- var ctx = this.ctx;
- var cursor = {
- x: this.left + ((this.width - this.lineWidths[0]) / 2),
- y: this.top + this.options.labels.padding,
- line: 0,
- };
-
- var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
-
- // Horizontal
- if (this.isHorizontal()) {
- // Labels
- ctx.textAlign = "left";
- ctx.textBaseline = 'top';
- ctx.lineWidth = 0.5;
- ctx.strokeStyle = this.options.labels.fontColor; // for strikethrough effect
- ctx.fillStyle = this.options.labels.fontColor; // render in correct colour
- ctx.font = labelFont;
-
- helpers.each(this.legendItems, function(legendItem, i) {
- var textWidth = ctx.measureText(legendItem.text).width;
- var width = this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + textWidth;
-
- if (cursor.x + width >= this.width) {
- cursor.y += this.options.labels.fontSize + (this.options.labels.padding);
- cursor.line++;
- cursor.x = this.left + ((this.width - this.lineWidths[cursor.line]) / 2);
- }
-
- // Set the ctx for the box
- ctx.save();
-
- var itemOrDefault = function(item, defaulVal) {
- return item !== undefined ? item : defaulVal;
- };
-
- ctx.fillStyle = itemOrDefault(legendItem.fillStyle, Chart.defaults.global.defaultColor);
- ctx.lineCap = itemOrDefault(legendItem.lineCap, Chart.defaults.global.elements.line.borderCapStyle);
- ctx.lineDashOffset = itemOrDefault(legendItem.lineDashOffset, Chart.defaults.global.elements.line.borderDashOffset);
- ctx.lineJoin = itemOrDefault(legendItem.lineJoin, Chart.defaults.global.elements.line.borderJoinStyle);
- ctx.lineWidth = itemOrDefault(legendItem.lineWidth, Chart.defaults.global.elements.line.borderWidth);
- ctx.strokeStyle = itemOrDefault(legendItem.strokeStyle, Chart.defaults.global.defaultColor);
-
- if (ctx.setLineDash) {
- // IE 9 and 10 do not support line dash
- ctx.setLineDash(itemOrDefault(legendItem.lineDash, Chart.defaults.global.elements.line.borderDash));
- }
-
- // Draw the box
- ctx.strokeRect(cursor.x, cursor.y, this.options.labels.boxWidth, this.options.labels.fontSize);
- ctx.fillRect(cursor.x, cursor.y, this.options.labels.boxWidth, this.options.labels.fontSize);
-
- ctx.restore();
-
- this.legendHitBoxes[i].left = cursor.x;
- this.legendHitBoxes[i].top = cursor.y;
-
- // Fill the actual label
- ctx.fillText(legendItem.text, this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x, cursor.y);
-
- if (legendItem.hidden) {
- // Strikethrough the text if hidden
- ctx.beginPath();
- ctx.lineWidth = 2;
- ctx.moveTo(this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x, cursor.y + (this.options.labels.fontSize / 2));
- ctx.lineTo(this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x + textWidth, cursor.y + (this.options.labels.fontSize / 2));
- ctx.stroke();
- }
-
- cursor.x += width + (this.options.labels.padding);
- }, this);
- } else {
-
- }
- }
- },
-
- // Handle an event
- handleEvent: function(e) {
- var position = helpers.getRelativePosition(e, this.chart.chart);
-
- if (position.x >= this.left && position.x <= this.right && position.y >= this.top && position.y <= this.bottom) {
- // See if we are touching one of the dataset boxes
- for (var i = 0; i < this.legendHitBoxes.length; ++i) {
- var hitBox = this.legendHitBoxes[i];
-
- if (position.x >= hitBox.left && position.x <= hitBox.left + hitBox.width && position.y >= hitBox.top && position.y <= hitBox.top + hitBox.height) {
- // Touching an element
- if (this.options.onClick) {
- this.options.onClick.call(this, e, this.legendItems[i]);
- }
- break;
- }
- }
- }
- }
- });
-
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.legend = {
+
+ display: true,
+ position: 'top',
+ fullWidth: true, // marks that this box should take the full width of the canvas (pushing down other boxes)
+
+ // a callback that will handle
+ onClick: function(e, legendItem) {
+ var dataset = this.chart.data.datasets[legendItem.datasetIndex];
+ dataset.hidden = !dataset.hidden;
+
+ // We hid a dataset ... rerender the chart
+ this.chart.update();
+ },
+
+ labels: {
+ boxWidth: 40,
+ fontSize: Chart.defaults.global.defaultFontSize,
+ fontStyle: Chart.defaults.global.defaultFontStyle,
+ fontColor: Chart.defaults.global.defaultFontColor,
+ fontFamily: Chart.defaults.global.defaultFontFamily,
+ padding: 10,
+ // Generates labels shown in the legend
+ // Valid properties to return:
+ // text : text to display
+ // fillStyle : fill of coloured box
+ // strokeStyle: stroke of coloured box
+ // hidden : if this legend item refers to a hidden item
+ // lineCap : cap style for line
+ // lineDash
+ // lineDashOffset :
+ // lineJoin :
+ // lineWidth :
+ generateLabels: function(data) {
+ return data.datasets.map(function(dataset, i) {
+ return {
+ text: dataset.label,
+ fillStyle: dataset.backgroundColor,
+ hidden: dataset.hidden,
+ lineCap: dataset.borderCapStyle,
+ lineDash: dataset.borderDash,
+ lineDashOffset: dataset.borderDashOffset,
+ lineJoin: dataset.borderJoinStyle,
+ lineWidth: dataset.borderWidth,
+ strokeStyle: dataset.borderColor,
+
+ // Below is extra data used for toggling the datasets
+ datasetIndex: i
+ };
+ }, this);
+ }
+ }
+ };
+
+ Chart.Legend = Chart.Element.extend({
+
+ initialize: function(config) {
+ helpers.extend(this, config);
+
+ // Contains hit boxes for each dataset (in dataset order)
+ this.legendHitBoxes = [];
+
+ // Are we in doughnut mode which has a different data type
+ this.doughnutMode = false;
+ },
+
+ // These methods are ordered by lifecyle. Utilities then follow.
+ // Any function defined here is inherited by all legend types.
+ // Any function can be extended by the legend type
+
+ beforeUpdate: helpers.noop,
+ update: function(maxWidth, maxHeight, margins) {
+
+ // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
+ this.beforeUpdate();
+
+ // Absorb the master measurements
+ this.maxWidth = maxWidth;
+ this.maxHeight = maxHeight;
+ this.margins = margins;
+
+ // Dimensions
+ this.beforeSetDimensions();
+ this.setDimensions();
+ this.afterSetDimensions();
+ // Labels
+ this.beforeBuildLabels();
+ this.buildLabels();
+ this.afterBuildLabels();
+
+ // Fit
+ this.beforeFit();
+ this.fit();
+ this.afterFit();
+ //
+ this.afterUpdate();
+
+ return this.minSize;
+
+ },
+ afterUpdate: helpers.noop,
+
+ //
+
+ beforeSetDimensions: helpers.noop,
+ setDimensions: function() {
+ // Set the unconstrained dimension before label rotation
+ if (this.isHorizontal()) {
+ // Reset position before calculating rotation
+ this.width = this.maxWidth;
+ this.left = 0;
+ this.right = this.width;
+ } else {
+ this.height = this.maxHeight;
+
+ // Reset position before calculating rotation
+ this.top = 0;
+ this.bottom = this.height;
+ }
+
+ // Reset padding
+ this.paddingLeft = 0;
+ this.paddingTop = 0;
+ this.paddingRight = 0;
+ this.paddingBottom = 0;
+
+ // Reset minSize
+ this.minSize = {
+ width: 0,
+ height: 0
+ };
+ },
+ afterSetDimensions: helpers.noop,
+
+ //
+
+ beforeBuildLabels: helpers.noop,
+ buildLabels: function() {
+ this.legendItems = this.options.labels.generateLabels.call(this, this.chart.data);
+ },
+ afterBuildLabels: helpers.noop,
+
+ //
+
+ beforeFit: helpers.noop,
+ fit: function() {
+
+ var ctx = this.ctx;
+ var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
+
+ // Reset hit boxes
+ this.legendHitBoxes = [];
+
+ // Width
+ if (this.isHorizontal()) {
+ this.minSize.width = this.maxWidth; // fill all the width
+ } else {
+ this.minSize.width = this.options.display ? 10 : 0;
+ }
+
+ // height
+ if (this.isHorizontal()) {
+ this.minSize.height = this.options.display ? 10 : 0;
+ } else {
+ this.minSize.height = this.maxHeight; // fill all the height
+ }
+
+ // Increase sizes here
+ if (this.options.display) {
+ if (this.isHorizontal()) {
+ // Labels
+
+ // Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one
+ this.lineWidths = [0];
+ var totalHeight = this.legendItems.length ? this.options.labels.fontSize + (this.options.labels.padding) : 0;
+
+ ctx.textAlign = "left";
+ ctx.textBaseline = 'top';
+ ctx.font = labelFont;
+
+ helpers.each(this.legendItems, function(legendItem, i) {
+ var width = this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + ctx.measureText(legendItem.text).width;
+ if (this.lineWidths[this.lineWidths.length - 1] + width >= this.width) {
+ totalHeight += this.options.labels.fontSize + (this.options.labels.padding);
+ this.lineWidths[this.lineWidths.length] = this.left;
+ }
+
+ // Store the hitbox width and height here. Final position will be updated in `draw`
+ this.legendHitBoxes[i] = {
+ left: 0,
+ top: 0,
+ width: width,
+ height: this.options.labels.fontSize
+ };
+
+ this.lineWidths[this.lineWidths.length - 1] += width + this.options.labels.padding;
+ }, this);
+
+ this.minSize.height += totalHeight;
+
+ } else {
+ // TODO vertical
+ }
+ }
+
+ this.width = this.minSize.width;
+ this.height = this.minSize.height;
+
+ },
+ afterFit: helpers.noop,
+
+ // Shared Methods
+ isHorizontal: function() {
+ return this.options.position === "top" || this.options.position === "bottom";
+ },
+
+ // Actualy draw the legend on the canvas
+ draw: function() {
+ if (this.options.display) {
+ var ctx = this.ctx;
+ var cursor = {
+ x: this.left + ((this.width - this.lineWidths[0]) / 2),
+ y: this.top + this.options.labels.padding,
+ line: 0
+ };
+
+ var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
+
+ // Horizontal
+ if (this.isHorizontal()) {
+ // Labels
+ ctx.textAlign = "left";
+ ctx.textBaseline = 'top';
+ ctx.lineWidth = 0.5;
+ ctx.strokeStyle = this.options.labels.fontColor; // for strikethrough effect
+ ctx.fillStyle = this.options.labels.fontColor; // render in correct colour
+ ctx.font = labelFont;
+
+ helpers.each(this.legendItems, function(legendItem, i) {
+ var textWidth = ctx.measureText(legendItem.text).width;
+ var width = this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + textWidth;
+
+ if (cursor.x + width >= this.width) {
+ cursor.y += this.options.labels.fontSize + (this.options.labels.padding);
+ cursor.line++;
+ cursor.x = this.left + ((this.width - this.lineWidths[cursor.line]) / 2);
+ }
+
+ // Set the ctx for the box
+ ctx.save();
+
+ var itemOrDefault = function(item, defaulVal) {
+ return item !== undefined ? item : defaulVal;
+ };
+
+ ctx.fillStyle = itemOrDefault(legendItem.fillStyle, Chart.defaults.global.defaultColor);
+ ctx.lineCap = itemOrDefault(legendItem.lineCap, Chart.defaults.global.elements.line.borderCapStyle);
+ ctx.lineDashOffset = itemOrDefault(legendItem.lineDashOffset, Chart.defaults.global.elements.line.borderDashOffset);
+ ctx.lineJoin = itemOrDefault(legendItem.lineJoin, Chart.defaults.global.elements.line.borderJoinStyle);
+ ctx.lineWidth = itemOrDefault(legendItem.lineWidth, Chart.defaults.global.elements.line.borderWidth);
+ ctx.strokeStyle = itemOrDefault(legendItem.strokeStyle, Chart.defaults.global.defaultColor);
+
+ if (ctx.setLineDash) {
+ // IE 9 and 10 do not support line dash
+ ctx.setLineDash(itemOrDefault(legendItem.lineDash, Chart.defaults.global.elements.line.borderDash));
+ }
+
+ // Draw the box
+ ctx.strokeRect(cursor.x, cursor.y, this.options.labels.boxWidth, this.options.labels.fontSize);
+ ctx.fillRect(cursor.x, cursor.y, this.options.labels.boxWidth, this.options.labels.fontSize);
+
+ ctx.restore();
+
+ this.legendHitBoxes[i].left = cursor.x;
+ this.legendHitBoxes[i].top = cursor.y;
+
+ // Fill the actual label
+ ctx.fillText(legendItem.text, this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x, cursor.y);
+
+ if (legendItem.hidden) {
+ // Strikethrough the text if hidden
+ ctx.beginPath();
+ ctx.lineWidth = 2;
+ ctx.moveTo(this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x, cursor.y + (this.options.labels.fontSize / 2));
+ ctx.lineTo(this.options.labels.boxWidth + (this.options.labels.fontSize / 2) + cursor.x + textWidth, cursor.y + (this.options.labels.fontSize / 2));
+ ctx.stroke();
+ }
+
+ cursor.x += width + (this.options.labels.padding);
+ }, this);
+ } else {
+
+ }
+ }
+ },
+
+ // Handle an event
+ handleEvent: function(e) {
+ var position = helpers.getRelativePosition(e, this.chart.chart);
+
+ if (position.x >= this.left && position.x <= this.right && position.y >= this.top && position.y <= this.bottom) {
+ // See if we are touching one of the dataset boxes
+ for (var i = 0; i < this.legendHitBoxes.length; ++i) {
+ var hitBox = this.legendHitBoxes[i];
+
+ if (position.x >= hitBox.left && position.x <= hitBox.left + hitBox.width && position.y >= hitBox.top && position.y <= hitBox.top + hitBox.height) {
+ // Touching an element
+ if (this.options.onClick) {
+ this.options.onClick.call(this, e, this.legendItems[i]);
+ }
+ break;
+ }
+ }
+ }
+ }
+ });
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.scale = {
- display: true,
-
- // grid line settings
- gridLines: {
- display: true,
- color: "rgba(0, 0, 0, 0.1)",
- lineWidth: 1,
- drawOnChartArea: true,
- drawTicks: true,
- zeroLineWidth: 1,
- zeroLineColor: "rgba(0,0,0,0.25)",
- offsetGridLines: false,
- },
-
- // scale label
- scaleLabel: {
- fontColor: Chart.defaults.global.defaultFontColor,
- fontFamily: Chart.defaults.global.defaultFontFamily,
- fontSize: Chart.defaults.global.defaultFontSize,
- fontStyle: Chart.defaults.global.defaultFontStyle,
-
- // actual label
- labelString: '',
-
- // display property
- display: false,
- },
-
- // label settings
- ticks: {
- beginAtZero: false,
- fontSize: Chart.defaults.global.defaultFontSize,
- fontStyle: Chart.defaults.global.defaultFontStyle,
- fontColor: Chart.defaults.global.defaultFontColor,
- fontFamily: Chart.defaults.global.defaultFontFamily,
- maxRotation: 90,
- mirror: false,
- padding: 10,
- reverse: false,
- display: true,
- autoSkip: true,
- autoSkipPadding: 20,
- callback: function(value) {
- return '' + value;
- },
- },
- };
-
- Chart.Scale = Chart.Element.extend({
-
- // These methods are ordered by lifecyle. Utilities then follow.
- // Any function defined here is inherited by all scale types.
- // Any function can be extended by the scale type
-
- beforeUpdate: function() {
- helpers.callCallback(this.options.beforeUpdate, [this]);
- },
- update: function(maxWidth, maxHeight, margins) {
-
- // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
- this.beforeUpdate();
-
- // Absorb the master measurements
- this.maxWidth = maxWidth;
- this.maxHeight = maxHeight;
- this.margins = helpers.extend({
- left: 0,
- right: 0,
- top: 0,
- bottom: 0
- }, margins);
-
- // Dimensions
- this.beforeSetDimensions();
- this.setDimensions();
- this.afterSetDimensions();
-
- // Data min/max
- this.beforeDataLimits();
- this.determineDataLimits();
- this.afterDataLimits();
-
- // Ticks
- this.beforeBuildTicks();
- this.buildTicks();
- this.afterBuildTicks();
-
- this.beforeTickToLabelConversion();
- this.convertTicksToLabels();
- this.afterTickToLabelConversion();
-
- // Tick Rotation
- this.beforeCalculateTickRotation();
- this.calculateTickRotation();
- this.afterCalculateTickRotation();
- // Fit
- this.beforeFit();
- this.fit();
- this.afterFit();
- //
- this.afterUpdate();
-
- return this.minSize;
-
- },
- afterUpdate: function() {
- helpers.callCallback(this.options.afterUpdate, [this]);
- },
-
- //
-
- beforeSetDimensions: function() {
- helpers.callCallback(this.options.beforeSetDimensions, [this]);
- },
- setDimensions: function() {
- // Set the unconstrained dimension before label rotation
- if (this.isHorizontal()) {
- // Reset position before calculating rotation
- this.width = this.maxWidth;
- this.left = 0;
- this.right = this.width;
- } else {
- this.height = this.maxHeight;
-
- // Reset position before calculating rotation
- this.top = 0;
- this.bottom = this.height;
- }
-
- // Reset padding
- this.paddingLeft = 0;
- this.paddingTop = 0;
- this.paddingRight = 0;
- this.paddingBottom = 0;
- },
- afterSetDimensions: function() {
- helpers.callCallback(this.options.afterSetDimensions, [this]);
- },
-
- // Data limits
- beforeDataLimits: function() {
- helpers.callCallback(this.options.beforeDataLimits, [this]);
- },
- determineDataLimits: helpers.noop,
- afterDataLimits: function() {
- helpers.callCallback(this.options.afterDataLimits, [this]);
- },
-
- //
- beforeBuildTicks: function() {
- helpers.callCallback(this.options.beforeBuildTicks, [this]);
- },
- buildTicks: helpers.noop,
- afterBuildTicks: function() {
- helpers.callCallback(this.options.afterBuildTicks, [this]);
- },
-
- beforeTickToLabelConversion: function() {
- helpers.callCallback(this.options.beforeTickToLabelConversion, [this]);
- },
- convertTicksToLabels: function() {
- // Convert ticks to strings
- this.ticks = this.ticks.map(function(numericalTick, index, ticks) {
- if (this.options.ticks.userCallback) {
- return this.options.ticks.userCallback(numericalTick, index, ticks);
- }
- return this.options.ticks.callback(numericalTick, index, ticks);
- },
- this);
- },
- afterTickToLabelConversion: function() {
- helpers.callCallback(this.options.afterTickToLabelConversion, [this]);
- },
-
- //
-
- beforeCalculateTickRotation: function() {
- helpers.callCallback(this.options.beforeCalculateTickRotation, [this]);
- },
- calculateTickRotation: function() {
- //Get the width of each grid by calculating the difference
- //between x offsets between 0 and 1.
- var labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
- this.ctx.font = labelFont;
-
- var firstWidth = this.ctx.measureText(this.ticks[0]).width;
- var lastWidth = this.ctx.measureText(this.ticks[this.ticks.length - 1]).width;
- var firstRotated;
-
- this.labelRotation = 0;
- this.paddingRight = 0;
- this.paddingLeft = 0;
-
- if (this.options.display) {
- if (this.isHorizontal()) {
- this.paddingRight = lastWidth / 2 + 3;
- this.paddingLeft = firstWidth / 2 + 3;
-
- if (!this.longestTextCache) {
- this.longestTextCache = {};
- }
- var originalLabelWidth = helpers.longestText(this.ctx, labelFont, this.ticks, this.longestTextCache);
- var labelWidth = originalLabelWidth;
- var cosRotation;
- var sinRotation;
-
- // Allow 3 pixels x2 padding either side for label readability
- // only the index matters for a dataset scale, but we want a consistent interface between scales
- var tickWidth = this.getPixelForTick(1) - this.getPixelForTick(0) - 6;
-
- //Max label rotation can be set or default to 90 - also act as a loop counter
- while (labelWidth > tickWidth && this.labelRotation < this.options.ticks.maxRotation) {
- cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
- sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
-
- firstRotated = cosRotation * firstWidth;
-
- // We're right aligning the text now.
- if (firstRotated + this.options.ticks.fontSize / 2 > this.yLabelWidth) {
- this.paddingLeft = firstRotated + this.options.ticks.fontSize / 2;
- }
-
- this.paddingRight = this.options.ticks.fontSize / 2;
-
- if (sinRotation * originalLabelWidth > this.maxHeight) {
- // go back one step
- this.labelRotation--;
- break;
- }
-
- this.labelRotation++;
- labelWidth = cosRotation * originalLabelWidth;
- }
- }
- }
-
- if (this.margins) {
- this.paddingLeft = Math.max(this.paddingLeft - this.margins.left, 0);
- this.paddingRight = Math.max(this.paddingRight - this.margins.right, 0);
- }
- },
- afterCalculateTickRotation: function() {
- helpers.callCallback(this.options.afterCalculateTickRotation, [this]);
- },
-
- //
-
- beforeFit: function() {
- helpers.callCallback(this.options.beforeFit, [this]);
- },
- fit: function() {
-
- this.minSize = {
- width: 0,
- height: 0,
- };
-
- // Width
- if (this.isHorizontal()) {
- // subtract the margins to line up with the chartArea if we are a full width scale
- this.minSize.width = this.isFullWidth() ? this.maxWidth - this.margins.left - this.margins.right : this.maxWidth;
- } else {
- this.minSize.width = this.options.gridLines.display && this.options.display ? 10 : 0;
- }
-
- // height
- if (this.isHorizontal()) {
- this.minSize.height = this.options.gridLines.display && this.options.display ? 10 : 0;
- } else {
- this.minSize.height = this.maxHeight; // fill all the height
- }
-
- // Are we showing a title for the scale?
- if (this.options.scaleLabel.display) {
- if (this.isHorizontal()) {
- this.minSize.height += (this.options.scaleLabel.fontSize * 1.5);
- } else {
- this.minSize.width += (this.options.scaleLabel.fontSize * 1.5);
- }
- }
-
- if (this.options.ticks.display && this.options.display) {
- // Don't bother fitting the ticks if we are not showing them
- var labelFont = helpers.fontString(this.options.ticks.fontSize,
- this.options.ticks.fontStyle, this.options.ticks.fontFamily);
-
- if (!this.longestTextCache) {
- this.longestTextCache = {};
- }
-
- var largestTextWidth = helpers.longestText(this.ctx, labelFont, this.ticks, this.longestTextCache);
-
- if (this.isHorizontal()) {
- // A horizontal axis is more constrained by the height.
- this.longestLabelWidth = largestTextWidth;
-
- // TODO - improve this calculation
- var labelHeight = (Math.sin(helpers.toRadians(this.labelRotation)) * this.longestLabelWidth) + 1.5 * this.options.ticks.fontSize;
-
- this.minSize.height = Math.min(this.maxHeight, this.minSize.height + labelHeight);
-
- labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
- this.ctx.font = labelFont;
-
- var firstLabelWidth = this.ctx.measureText(this.ticks[0]).width;
- var lastLabelWidth = this.ctx.measureText(this.ticks[this.ticks.length - 1]).width;
-
- // Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned which means that the right padding is dominated
- // by the font height
- var cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
- var sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
- this.paddingLeft = this.labelRotation !== 0 ? (cosRotation * firstLabelWidth) + 3 : firstLabelWidth / 2 + 3; // add 3 px to move away from canvas edges
- this.paddingRight = this.labelRotation !== 0 ? (sinRotation * (this.options.ticks.fontSize / 2)) + 3 : lastLabelWidth / 2 + 3; // when rotated
- } else {
- // A vertical axis is more constrained by the width. Labels are the dominant factor here, so get that length first
- var maxLabelWidth = this.maxWidth - this.minSize.width;
-
- // Account for padding
- if (!this.options.ticks.mirror) {
- largestTextWidth += this.options.ticks.padding;
- }
-
- if (largestTextWidth < maxLabelWidth) {
- // We don't need all the room
- this.minSize.width += largestTextWidth;
- } else {
- // Expand to max size
- this.minSize.width = this.maxWidth;
- }
-
- this.paddingTop = this.options.ticks.fontSize / 2;
- this.paddingBottom = this.options.ticks.fontSize / 2;
- }
- }
-
- if (this.margins) {
- this.paddingLeft = Math.max(this.paddingLeft - this.margins.left, 0);
- this.paddingTop = Math.max(this.paddingTop - this.margins.top, 0);
- this.paddingRight = Math.max(this.paddingRight - this.margins.right, 0);
- this.paddingBottom = Math.max(this.paddingBottom - this.margins.bottom, 0);
- }
-
- this.width = this.minSize.width;
- this.height = this.minSize.height;
-
- },
- afterFit: function() {
- helpers.callCallback(this.options.afterFit, [this]);
- },
-
- // Shared Methods
- isHorizontal: function() {
- return this.options.position === "top" || this.options.position === "bottom";
- },
- isFullWidth: function() {
- return (this.options.fullWidth);
- },
-
- // Get the correct value. NaN bad inputs, If the value type is object get the x or y based on whether we are horizontal or not
- getRightValue: function getRightValue(rawValue) {
- // Null and undefined values first
- if (rawValue === null || typeof(rawValue) === 'undefined') {
- return NaN;
- }
- // isNaN(object) returns true, so make sure NaN is checking for a number
- if (typeof(rawValue) === 'number' && isNaN(rawValue)) {
- return NaN;
- }
- // If it is in fact an object, dive in one more level
- if (typeof(rawValue) === "object") {
- if (rawValue instanceof Date) {
- return rawValue;
- } else {
- return getRightValue(this.isHorizontal() ? rawValue.x : rawValue.y);
- }
- }
-
- // Value is good, return it
- return rawValue;
- },
-
- // Used to get the value to display in the tooltip for the data at the given index
- // function getLabelForIndex(index, datasetIndex)
- getLabelForIndex: helpers.noop,
-
- // Used to get data value locations. Value can either be an index or a numerical value
- getPixelForValue: helpers.noop,
-
- // Used for tick location, should
- getPixelForTick: function(index, includeOffset) {
- if (this.isHorizontal()) {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- var tickWidth = innerWidth / Math.max((this.ticks.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
- var pixel = (tickWidth * index) + this.paddingLeft;
-
- if (includeOffset) {
- pixel += tickWidth / 2;
- }
-
- var finalVal = this.left + Math.round(pixel);
- finalVal += this.isFullWidth() ? this.margins.left : 0;
- return finalVal;
- } else {
- var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
- return this.top + (index * (innerHeight / (this.ticks.length - 1)));
- }
- },
-
- // Utility for getting the pixel location of a percentage of scale
- getPixelForDecimal: function(decimal /*, includeOffset*/ ) {
- if (this.isHorizontal()) {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- var valueOffset = (innerWidth * decimal) + this.paddingLeft;
-
- var finalVal = this.left + Math.round(valueOffset);
- finalVal += this.isFullWidth() ? this.margins.left : 0;
- return finalVal;
- } else {
- return this.top + (decimal * this.height);
- }
- },
-
- // Actualy draw the scale on the canvas
- // @param {rectangle} chartArea : the area of the chart to draw full grid lines on
- draw: function(chartArea) {
- if (this.options.display) {
-
- var setContextLineSettings;
- var isRotated = this.labelRotation !== 0;
- var skipRatio;
- var scaleLabelX;
- var scaleLabelY;
- var useAutoskipper = this.options.ticks.autoSkip;
-
-
- // figure out the maximum number of gridlines to show
- var maxTicks;
-
- if (this.options.ticks.maxTicksLimit) {
- maxTicks = this.options.ticks.maxTicksLimit;
- }
-
- // Make sure we draw text in the correct color and font
- this.ctx.fillStyle = this.options.ticks.fontColor;
- var labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
-
- var cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
- var sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
- var longestRotatedLabel = this.longestLabelWidth * cosRotation;
- var rotatedLabelHeight = this.options.ticks.fontSize * sinRotation;
-
- if (this.isHorizontal()) {
- setContextLineSettings = true;
- var yTickStart = this.options.position === "bottom" ? this.top : this.bottom - 10;
- var yTickEnd = this.options.position === "bottom" ? this.top + 10 : this.bottom;
- skipRatio = false;
-
- if (((longestRotatedLabel / 2) + this.options.ticks.autoSkipPadding) * this.ticks.length > (this.width - (this.paddingLeft + this.paddingRight))) {
- skipRatio = 1 + Math.floor((((longestRotatedLabel / 2) + this.options.ticks.autoSkipPadding) * this.ticks.length) / (this.width - (this.paddingLeft + this.paddingRight)));
- }
-
- if (!useAutoskipper) {
- skipRatio = false;
- }
-
- // if they defined a max number of ticks,
- // increase skipRatio until that number is met
- if (maxTicks && this.ticks.length > maxTicks) {
- while (!skipRatio || this.ticks.length / (skipRatio || 1) > maxTicks) {
- if (!skipRatio) {
- skipRatio = 1;
- }
- skipRatio += 1;
- }
- }
-
- helpers.each(this.ticks, function(label, index) {
- // Blank ticks
- var isLastTick = this.ticks.length == index + 1;
- var shouldSkip = skipRatio > 1 && index % skipRatio > 0;
- if (shouldSkip && !isLastTick || (label === undefined || label === null)) {
- return;
- }
- var xLineValue = this.getPixelForTick(index); // xvalues for grid lines
- var xLabelValue = this.getPixelForTick(index, this.options.gridLines.offsetGridLines); // x values for ticks (need to consider offsetLabel option)
-
- if (this.options.gridLines.display) {
- if (index === (typeof this.zeroLineIndex !== 'undefined' ? this.zeroLineIndex : 0)) {
- // Draw the first index specially
- this.ctx.lineWidth = this.options.gridLines.zeroLineWidth;
- this.ctx.strokeStyle = this.options.gridLines.zeroLineColor;
- setContextLineSettings = true; // reset next time
- } else if (setContextLineSettings) {
- this.ctx.lineWidth = this.options.gridLines.lineWidth;
- this.ctx.strokeStyle = this.options.gridLines.color;
- setContextLineSettings = false;
- }
-
- xLineValue += helpers.aliasPixel(this.ctx.lineWidth);
-
- // Draw the label area
- this.ctx.beginPath();
-
- if (this.options.gridLines.drawTicks) {
- this.ctx.moveTo(xLineValue, yTickStart);
- this.ctx.lineTo(xLineValue, yTickEnd);
- }
-
- // Draw the chart area
- if (this.options.gridLines.drawOnChartArea) {
- this.ctx.moveTo(xLineValue, chartArea.top);
- this.ctx.lineTo(xLineValue, chartArea.bottom);
- }
-
- // Need to stroke in the loop because we are potentially changing line widths & colours
- this.ctx.stroke();
- }
-
- if (this.options.ticks.display) {
- this.ctx.save();
- this.ctx.translate(xLabelValue, (isRotated) ? this.top + 12 : this.options.position === "top" ? this.bottom - 10 : this.top + 10);
- this.ctx.rotate(helpers.toRadians(this.labelRotation) * -1);
- this.ctx.font = labelFont;
- this.ctx.textAlign = (isRotated) ? "right" : "center";
- this.ctx.textBaseline = (isRotated) ? "middle" : this.options.position === "top" ? "bottom" : "top";
- this.ctx.fillText(label, 0, 0);
- this.ctx.restore();
- }
- }, this);
-
- if (this.options.scaleLabel.display) {
- // Draw the scale label
- this.ctx.textAlign = "center";
- this.ctx.textBaseline = 'middle';
- this.ctx.fillStyle = this.options.scaleLabel.fontColor; // render in correct colour
- this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
-
- scaleLabelX = this.left + ((this.right - this.left) / 2); // midpoint of the width
- scaleLabelY = this.options.position === 'bottom' ? this.bottom - (this.options.scaleLabel.fontSize / 2) : this.top + (this.options.scaleLabel.fontSize / 2);
-
- this.ctx.fillText(this.options.scaleLabel.labelString, scaleLabelX, scaleLabelY);
- }
-
- } else {
- setContextLineSettings = true;
- var xTickStart = this.options.position === "right" ? this.left : this.right - 5;
- var xTickEnd = this.options.position === "right" ? this.left + 5 : this.right;
-
- helpers.each(this.ticks, function(label, index) {
- // If the callback returned a null or undefined value, do not draw this line
- if (label === undefined || label === null) {
- return;
- }
-
- var yLineValue = this.getPixelForTick(index); // xvalues for grid lines
-
- if (this.options.gridLines.display) {
- if (index === (typeof this.zeroLineIndex !== 'undefined' ? this.zeroLineIndex : 0)) {
- // Draw the first index specially
- this.ctx.lineWidth = this.options.gridLines.zeroLineWidth;
- this.ctx.strokeStyle = this.options.gridLines.zeroLineColor;
- setContextLineSettings = true; // reset next time
- } else if (setContextLineSettings) {
- this.ctx.lineWidth = this.options.gridLines.lineWidth;
- this.ctx.strokeStyle = this.options.gridLines.color;
- setContextLineSettings = false;
- }
-
- yLineValue += helpers.aliasPixel(this.ctx.lineWidth);
-
- // Draw the label area
- this.ctx.beginPath();
-
- if (this.options.gridLines.drawTicks) {
- this.ctx.moveTo(xTickStart, yLineValue);
- this.ctx.lineTo(xTickEnd, yLineValue);
- }
-
- // Draw the chart area
- if (this.options.gridLines.drawOnChartArea) {
- this.ctx.moveTo(chartArea.left, yLineValue);
- this.ctx.lineTo(chartArea.right, yLineValue);
- }
-
- // Need to stroke in the loop because we are potentially changing line widths & colours
- this.ctx.stroke();
- }
-
- if (this.options.ticks.display) {
- var xLabelValue;
- var yLabelValue = this.getPixelForTick(index, this.options.gridLines.offsetGridLines); // x values for ticks (need to consider offsetLabel option)
-
- this.ctx.save();
-
- if (this.options.position === "left") {
- if (this.options.ticks.mirror) {
- xLabelValue = this.right + this.options.ticks.padding;
- this.ctx.textAlign = "left";
- } else {
- xLabelValue = this.right - this.options.ticks.padding;
- this.ctx.textAlign = "right";
- }
- } else {
- // right side
- if (this.options.ticks.mirror) {
- xLabelValue = this.left - this.options.ticks.padding;
- this.ctx.textAlign = "right";
- } else {
- xLabelValue = this.left + this.options.ticks.padding;
- this.ctx.textAlign = "left";
- }
- }
-
- this.ctx.translate(xLabelValue, yLabelValue);
- this.ctx.rotate(helpers.toRadians(this.labelRotation) * -1);
- this.ctx.font = labelFont;
- this.ctx.textBaseline = "middle";
- this.ctx.fillText(label, 0, 0);
- this.ctx.restore();
- }
- }, this);
-
- if (this.options.scaleLabel.display) {
- // Draw the scale label
- scaleLabelX = this.options.position === 'left' ? this.left + (this.options.scaleLabel.fontSize / 2) : this.right - (this.options.scaleLabel.fontSize / 2);
- scaleLabelY = this.top + ((this.bottom - this.top) / 2);
- var rotation = this.options.position === 'left' ? -0.5 * Math.PI : 0.5 * Math.PI;
-
- this.ctx.save();
- this.ctx.translate(scaleLabelX, scaleLabelY);
- this.ctx.rotate(rotation);
- this.ctx.textAlign = "center";
- this.ctx.fillStyle = this.options.scaleLabel.fontColor; // render in correct colour
- this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
- this.ctx.textBaseline = 'middle';
- this.ctx.fillText(this.options.scaleLabel.labelString, 0, 0);
- this.ctx.restore();
- }
- }
-
- // Draw the line at the edge of the axis
- this.ctx.lineWidth = this.options.gridLines.lineWidth;
- this.ctx.strokeStyle = this.options.gridLines.color;
- var x1 = this.left,
- x2 = this.right,
- y1 = this.top,
- y2 = this.bottom;
-
- if (this.isHorizontal()) {
- y1 = y2 = this.options.position === 'top' ? this.bottom : this.top;
- y1 += helpers.aliasPixel(this.ctx.lineWidth);
- y2 += helpers.aliasPixel(this.ctx.lineWidth);
- } else {
- x1 = x2 = this.options.position === 'left' ? this.right : this.left;
- x1 += helpers.aliasPixel(this.ctx.lineWidth);
- x2 += helpers.aliasPixel(this.ctx.lineWidth);
- }
-
- this.ctx.beginPath();
- this.ctx.moveTo(x1, y1);
- this.ctx.lineTo(x2, y2);
- this.ctx.stroke();
- }
- }
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.scale = {
+ display: true,
+
+ // grid line settings
+ gridLines: {
+ display: true,
+ color: "rgba(0, 0, 0, 0.1)",
+ lineWidth: 1,
+ drawOnChartArea: true,
+ drawTicks: true,
+ zeroLineWidth: 1,
+ zeroLineColor: "rgba(0,0,0,0.25)",
+ offsetGridLines: false
+ },
+
+ // scale label
+ scaleLabel: {
+ fontColor: Chart.defaults.global.defaultFontColor,
+ fontFamily: Chart.defaults.global.defaultFontFamily,
+ fontSize: Chart.defaults.global.defaultFontSize,
+ fontStyle: Chart.defaults.global.defaultFontStyle,
+
+ // actual label
+ labelString: '',
+
+ // display property
+ display: false
+ },
+
+ // label settings
+ ticks: {
+ beginAtZero: false,
+ fontSize: Chart.defaults.global.defaultFontSize,
+ fontStyle: Chart.defaults.global.defaultFontStyle,
+ fontColor: Chart.defaults.global.defaultFontColor,
+ fontFamily: Chart.defaults.global.defaultFontFamily,
+ maxRotation: 90,
+ mirror: false,
+ padding: 10,
+ reverse: false,
+ display: true,
+ autoSkip: true,
+ autoSkipPadding: 20,
+ callback: function(value) {
+ return '' + value;
+ }
+ }
+ };
+
+ Chart.Scale = Chart.Element.extend({
+
+ // These methods are ordered by lifecyle. Utilities then follow.
+ // Any function defined here is inherited by all scale types.
+ // Any function can be extended by the scale type
+
+ beforeUpdate: function() {
+ helpers.callCallback(this.options.beforeUpdate, [this]);
+ },
+ update: function(maxWidth, maxHeight, margins) {
+
+ // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
+ this.beforeUpdate();
+
+ // Absorb the master measurements
+ this.maxWidth = maxWidth;
+ this.maxHeight = maxHeight;
+ this.margins = helpers.extend({
+ left: 0,
+ right: 0,
+ top: 0,
+ bottom: 0
+ }, margins);
+
+ // Dimensions
+ this.beforeSetDimensions();
+ this.setDimensions();
+ this.afterSetDimensions();
+
+ // Data min/max
+ this.beforeDataLimits();
+ this.determineDataLimits();
+ this.afterDataLimits();
+
+ // Ticks
+ this.beforeBuildTicks();
+ this.buildTicks();
+ this.afterBuildTicks();
+
+ this.beforeTickToLabelConversion();
+ this.convertTicksToLabels();
+ this.afterTickToLabelConversion();
+
+ // Tick Rotation
+ this.beforeCalculateTickRotation();
+ this.calculateTickRotation();
+ this.afterCalculateTickRotation();
+ // Fit
+ this.beforeFit();
+ this.fit();
+ this.afterFit();
+ //
+ this.afterUpdate();
+
+ return this.minSize;
+
+ },
+ afterUpdate: function() {
+ helpers.callCallback(this.options.afterUpdate, [this]);
+ },
+
+ //
+
+ beforeSetDimensions: function() {
+ helpers.callCallback(this.options.beforeSetDimensions, [this]);
+ },
+ setDimensions: function() {
+ // Set the unconstrained dimension before label rotation
+ if (this.isHorizontal()) {
+ // Reset position before calculating rotation
+ this.width = this.maxWidth;
+ this.left = 0;
+ this.right = this.width;
+ } else {
+ this.height = this.maxHeight;
+
+ // Reset position before calculating rotation
+ this.top = 0;
+ this.bottom = this.height;
+ }
+
+ // Reset padding
+ this.paddingLeft = 0;
+ this.paddingTop = 0;
+ this.paddingRight = 0;
+ this.paddingBottom = 0;
+ },
+ afterSetDimensions: function() {
+ helpers.callCallback(this.options.afterSetDimensions, [this]);
+ },
+
+ // Data limits
+ beforeDataLimits: function() {
+ helpers.callCallback(this.options.beforeDataLimits, [this]);
+ },
+ determineDataLimits: helpers.noop,
+ afterDataLimits: function() {
+ helpers.callCallback(this.options.afterDataLimits, [this]);
+ },
+
+ //
+ beforeBuildTicks: function() {
+ helpers.callCallback(this.options.beforeBuildTicks, [this]);
+ },
+ buildTicks: helpers.noop,
+ afterBuildTicks: function() {
+ helpers.callCallback(this.options.afterBuildTicks, [this]);
+ },
+
+ beforeTickToLabelConversion: function() {
+ helpers.callCallback(this.options.beforeTickToLabelConversion, [this]);
+ },
+ convertTicksToLabels: function() {
+ // Convert ticks to strings
+ this.ticks = this.ticks.map(function(numericalTick, index, ticks) {
+ if (this.options.ticks.userCallback) {
+ return this.options.ticks.userCallback(numericalTick, index, ticks);
+ }
+ return this.options.ticks.callback(numericalTick, index, ticks);
+ },
+ this);
+ },
+ afterTickToLabelConversion: function() {
+ helpers.callCallback(this.options.afterTickToLabelConversion, [this]);
+ },
+
+ //
+
+ beforeCalculateTickRotation: function() {
+ helpers.callCallback(this.options.beforeCalculateTickRotation, [this]);
+ },
+ calculateTickRotation: function() {
+ //Get the width of each grid by calculating the difference
+ //between x offsets between 0 and 1.
+ var labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
+ this.ctx.font = labelFont;
+
+ var firstWidth = this.ctx.measureText(this.ticks[0]).width;
+ var lastWidth = this.ctx.measureText(this.ticks[this.ticks.length - 1]).width;
+ var firstRotated;
+
+ this.labelRotation = 0;
+ this.paddingRight = 0;
+ this.paddingLeft = 0;
+
+ if (this.options.display) {
+ if (this.isHorizontal()) {
+ this.paddingRight = lastWidth / 2 + 3;
+ this.paddingLeft = firstWidth / 2 + 3;
+
+ if (!this.longestTextCache) {
+ this.longestTextCache = {};
+ }
+ var originalLabelWidth = helpers.longestText(this.ctx, labelFont, this.ticks, this.longestTextCache);
+ var labelWidth = originalLabelWidth;
+ var cosRotation;
+ var sinRotation;
+
+ // Allow 3 pixels x2 padding either side for label readability
+ // only the index matters for a dataset scale, but we want a consistent interface between scales
+ var tickWidth = this.getPixelForTick(1) - this.getPixelForTick(0) - 6;
+
+ //Max label rotation can be set or default to 90 - also act as a loop counter
+ while (labelWidth > tickWidth && this.labelRotation < this.options.ticks.maxRotation) {
+ cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
+ sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
+
+ firstRotated = cosRotation * firstWidth;
+
+ // We're right aligning the text now.
+ if (firstRotated + this.options.ticks.fontSize / 2 > this.yLabelWidth) {
+ this.paddingLeft = firstRotated + this.options.ticks.fontSize / 2;
+ }
+
+ this.paddingRight = this.options.ticks.fontSize / 2;
+
+ if (sinRotation * originalLabelWidth > this.maxHeight) {
+ // go back one step
+ this.labelRotation--;
+ break;
+ }
+
+ this.labelRotation++;
+ labelWidth = cosRotation * originalLabelWidth;
+ }
+ }
+ }
+
+ if (this.margins) {
+ this.paddingLeft = Math.max(this.paddingLeft - this.margins.left, 0);
+ this.paddingRight = Math.max(this.paddingRight - this.margins.right, 0);
+ }
+ },
+ afterCalculateTickRotation: function() {
+ helpers.callCallback(this.options.afterCalculateTickRotation, [this]);
+ },
+
+ //
+
+ beforeFit: function() {
+ helpers.callCallback(this.options.beforeFit, [this]);
+ },
+ fit: function() {
+
+ this.minSize = {
+ width: 0,
+ height: 0
+ };
+
+ // Width
+ if (this.isHorizontal()) {
+ // subtract the margins to line up with the chartArea if we are a full width scale
+ this.minSize.width = this.isFullWidth() ? this.maxWidth - this.margins.left - this.margins.right : this.maxWidth;
+ } else {
+ this.minSize.width = this.options.gridLines.display && this.options.display ? 10 : 0;
+ }
+
+ // height
+ if (this.isHorizontal()) {
+ this.minSize.height = this.options.gridLines.display && this.options.display ? 10 : 0;
+ } else {
+ this.minSize.height = this.maxHeight; // fill all the height
+ }
+
+ // Are we showing a title for the scale?
+ if (this.options.scaleLabel.display) {
+ if (this.isHorizontal()) {
+ this.minSize.height += (this.options.scaleLabel.fontSize * 1.5);
+ } else {
+ this.minSize.width += (this.options.scaleLabel.fontSize * 1.5);
+ }
+ }
+
+ if (this.options.ticks.display && this.options.display) {
+ // Don't bother fitting the ticks if we are not showing them
+ var labelFont = helpers.fontString(this.options.ticks.fontSize,
+ this.options.ticks.fontStyle, this.options.ticks.fontFamily);
+
+ if (!this.longestTextCache) {
+ this.longestTextCache = {};
+ }
+
+ var largestTextWidth = helpers.longestText(this.ctx, labelFont, this.ticks, this.longestTextCache);
+
+ if (this.isHorizontal()) {
+ // A horizontal axis is more constrained by the height.
+ this.longestLabelWidth = largestTextWidth;
+
+ // TODO - improve this calculation
+ var labelHeight = (Math.sin(helpers.toRadians(this.labelRotation)) * this.longestLabelWidth) + 1.5 * this.options.ticks.fontSize;
+
+ this.minSize.height = Math.min(this.maxHeight, this.minSize.height + labelHeight);
+
+ labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
+ this.ctx.font = labelFont;
+
+ var firstLabelWidth = this.ctx.measureText(this.ticks[0]).width;
+ var lastLabelWidth = this.ctx.measureText(this.ticks[this.ticks.length - 1]).width;
+
+ // Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned which means that the right padding is dominated
+ // by the font height
+ var cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
+ var sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
+ this.paddingLeft = this.labelRotation !== 0 ? (cosRotation * firstLabelWidth) + 3 : firstLabelWidth / 2 + 3; // add 3 px to move away from canvas edges
+ this.paddingRight = this.labelRotation !== 0 ? (sinRotation * (this.options.ticks.fontSize / 2)) + 3 : lastLabelWidth / 2 + 3; // when rotated
+ } else {
+ // A vertical axis is more constrained by the width. Labels are the dominant factor here, so get that length first
+ var maxLabelWidth = this.maxWidth - this.minSize.width;
+
+ // Account for padding
+ if (!this.options.ticks.mirror) {
+ largestTextWidth += this.options.ticks.padding;
+ }
+
+ if (largestTextWidth < maxLabelWidth) {
+ // We don't need all the room
+ this.minSize.width += largestTextWidth;
+ } else {
+ // Expand to max size
+ this.minSize.width = this.maxWidth;
+ }
+
+ this.paddingTop = this.options.ticks.fontSize / 2;
+ this.paddingBottom = this.options.ticks.fontSize / 2;
+ }
+ }
+
+ if (this.margins) {
+ this.paddingLeft = Math.max(this.paddingLeft - this.margins.left, 0);
+ this.paddingTop = Math.max(this.paddingTop - this.margins.top, 0);
+ this.paddingRight = Math.max(this.paddingRight - this.margins.right, 0);
+ this.paddingBottom = Math.max(this.paddingBottom - this.margins.bottom, 0);
+ }
+
+ this.width = this.minSize.width;
+ this.height = this.minSize.height;
+
+ },
+ afterFit: function() {
+ helpers.callCallback(this.options.afterFit, [this]);
+ },
+
+ // Shared Methods
+ isHorizontal: function() {
+ return this.options.position === "top" || this.options.position === "bottom";
+ },
+ isFullWidth: function() {
+ return (this.options.fullWidth);
+ },
+
+ // Get the correct value. NaN bad inputs, If the value type is object get the x or y based on whether we are horizontal or not
+ getRightValue: function getRightValue(rawValue) {
+ // Null and undefined values first
+ if (rawValue === null || typeof(rawValue) === 'undefined') {
+ return NaN;
+ }
+ // isNaN(object) returns true, so make sure NaN is checking for a number
+ if (typeof(rawValue) === 'number' && isNaN(rawValue)) {
+ return NaN;
+ }
+ // If it is in fact an object, dive in one more level
+ if (typeof(rawValue) === "object") {
+ if (rawValue instanceof Date) {
+ return rawValue;
+ } else {
+ return getRightValue(this.isHorizontal() ? rawValue.x : rawValue.y);
+ }
+ }
+
+ // Value is good, return it
+ return rawValue;
+ },
+
+ // Used to get the value to display in the tooltip for the data at the given index
+ // function getLabelForIndex(index, datasetIndex)
+ getLabelForIndex: helpers.noop,
+
+ // Used to get data value locations. Value can either be an index or a numerical value
+ getPixelForValue: helpers.noop,
+
+ // Used for tick location, should
+ getPixelForTick: function(index, includeOffset) {
+ if (this.isHorizontal()) {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ var tickWidth = innerWidth / Math.max((this.ticks.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
+ var pixel = (tickWidth * index) + this.paddingLeft;
+
+ if (includeOffset) {
+ pixel += tickWidth / 2;
+ }
+
+ var finalVal = this.left + Math.round(pixel);
+ finalVal += this.isFullWidth() ? this.margins.left : 0;
+ return finalVal;
+ } else {
+ var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
+ return this.top + (index * (innerHeight / (this.ticks.length - 1)));
+ }
+ },
+
+ // Utility for getting the pixel location of a percentage of scale
+ getPixelForDecimal: function(decimal /*, includeOffset*/ ) {
+ if (this.isHorizontal()) {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ var valueOffset = (innerWidth * decimal) + this.paddingLeft;
+
+ var finalVal = this.left + Math.round(valueOffset);
+ finalVal += this.isFullWidth() ? this.margins.left : 0;
+ return finalVal;
+ } else {
+ return this.top + (decimal * this.height);
+ }
+ },
+
+ // Actualy draw the scale on the canvas
+ // @param {rectangle} chartArea : the area of the chart to draw full grid lines on
+ draw: function(chartArea) {
+ if (this.options.display) {
+
+ var setContextLineSettings;
+ var isRotated = this.labelRotation !== 0;
+ var skipRatio;
+ var scaleLabelX;
+ var scaleLabelY;
+ var useAutoskipper = this.options.ticks.autoSkip;
+
+
+ // figure out the maximum number of gridlines to show
+ var maxTicks;
+
+ if (this.options.ticks.maxTicksLimit) {
+ maxTicks = this.options.ticks.maxTicksLimit;
+ }
+
+ // Make sure we draw text in the correct color and font
+ this.ctx.fillStyle = this.options.ticks.fontColor;
+ var labelFont = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
+
+ var cosRotation = Math.cos(helpers.toRadians(this.labelRotation));
+ var sinRotation = Math.sin(helpers.toRadians(this.labelRotation));
+ var longestRotatedLabel = this.longestLabelWidth * cosRotation;
+ var rotatedLabelHeight = this.options.ticks.fontSize * sinRotation;
+
+ if (this.isHorizontal()) {
+ setContextLineSettings = true;
+ var yTickStart = this.options.position === "bottom" ? this.top : this.bottom - 10;
+ var yTickEnd = this.options.position === "bottom" ? this.top + 10 : this.bottom;
+ skipRatio = false;
+
+ if (((longestRotatedLabel / 2) + this.options.ticks.autoSkipPadding) * this.ticks.length > (this.width - (this.paddingLeft + this.paddingRight))) {
+ skipRatio = 1 + Math.floor((((longestRotatedLabel / 2) + this.options.ticks.autoSkipPadding) * this.ticks.length) / (this.width - (this.paddingLeft + this.paddingRight)));
+ }
+
+ if (!useAutoskipper) {
+ skipRatio = false;
+ }
+
+ // if they defined a max number of ticks,
+ // increase skipRatio until that number is met
+ if (maxTicks && this.ticks.length > maxTicks) {
+ while (!skipRatio || this.ticks.length / (skipRatio || 1) > maxTicks) {
+ if (!skipRatio) {
+ skipRatio = 1;
+ }
+ skipRatio += 1;
+ }
+ }
+
+ helpers.each(this.ticks, function(label, index) {
+ // Blank ticks
+ var isLastTick = this.ticks.length === index + 1;
+ var shouldSkip = skipRatio > 1 && index % skipRatio > 0;
+ if (shouldSkip && !isLastTick || (label === undefined || label === null)) {
+ return;
+ }
+ var xLineValue = this.getPixelForTick(index); // xvalues for grid lines
+ var xLabelValue = this.getPixelForTick(index, this.options.gridLines.offsetGridLines); // x values for ticks (need to consider offsetLabel option)
+
+ if (this.options.gridLines.display) {
+ if (index === (typeof this.zeroLineIndex !== 'undefined' ? this.zeroLineIndex : 0)) {
+ // Draw the first index specially
+ this.ctx.lineWidth = this.options.gridLines.zeroLineWidth;
+ this.ctx.strokeStyle = this.options.gridLines.zeroLineColor;
+ setContextLineSettings = true; // reset next time
+ } else if (setContextLineSettings) {
+ this.ctx.lineWidth = this.options.gridLines.lineWidth;
+ this.ctx.strokeStyle = this.options.gridLines.color;
+ setContextLineSettings = false;
+ }
+
+ xLineValue += helpers.aliasPixel(this.ctx.lineWidth);
+
+ // Draw the label area
+ this.ctx.beginPath();
+
+ if (this.options.gridLines.drawTicks) {
+ this.ctx.moveTo(xLineValue, yTickStart);
+ this.ctx.lineTo(xLineValue, yTickEnd);
+ }
+
+ // Draw the chart area
+ if (this.options.gridLines.drawOnChartArea) {
+ this.ctx.moveTo(xLineValue, chartArea.top);
+ this.ctx.lineTo(xLineValue, chartArea.bottom);
+ }
+
+ // Need to stroke in the loop because we are potentially changing line widths & colours
+ this.ctx.stroke();
+ }
+
+ if (this.options.ticks.display) {
+ this.ctx.save();
+ this.ctx.translate(xLabelValue, (isRotated) ? this.top + 12 : this.options.position === "top" ? this.bottom - 10 : this.top + 10);
+ this.ctx.rotate(helpers.toRadians(this.labelRotation) * -1);
+ this.ctx.font = labelFont;
+ this.ctx.textAlign = (isRotated) ? "right" : "center";
+ this.ctx.textBaseline = (isRotated) ? "middle" : this.options.position === "top" ? "bottom" : "top";
+ this.ctx.fillText(label, 0, 0);
+ this.ctx.restore();
+ }
+ }, this);
+
+ if (this.options.scaleLabel.display) {
+ // Draw the scale label
+ this.ctx.textAlign = "center";
+ this.ctx.textBaseline = 'middle';
+ this.ctx.fillStyle = this.options.scaleLabel.fontColor; // render in correct colour
+ this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
+
+ scaleLabelX = this.left + ((this.right - this.left) / 2); // midpoint of the width
+ scaleLabelY = this.options.position === 'bottom' ? this.bottom - (this.options.scaleLabel.fontSize / 2) : this.top + (this.options.scaleLabel.fontSize / 2);
+
+ this.ctx.fillText(this.options.scaleLabel.labelString, scaleLabelX, scaleLabelY);
+ }
+
+ } else {
+ setContextLineSettings = true;
+ var xTickStart = this.options.position === "right" ? this.left : this.right - 5;
+ var xTickEnd = this.options.position === "right" ? this.left + 5 : this.right;
+
+ helpers.each(this.ticks, function(label, index) {
+ // If the callback returned a null or undefined value, do not draw this line
+ if (label === undefined || label === null) {
+ return;
+ }
+
+ var yLineValue = this.getPixelForTick(index); // xvalues for grid lines
+
+ if (this.options.gridLines.display) {
+ if (index === (typeof this.zeroLineIndex !== 'undefined' ? this.zeroLineIndex : 0)) {
+ // Draw the first index specially
+ this.ctx.lineWidth = this.options.gridLines.zeroLineWidth;
+ this.ctx.strokeStyle = this.options.gridLines.zeroLineColor;
+ setContextLineSettings = true; // reset next time
+ } else if (setContextLineSettings) {
+ this.ctx.lineWidth = this.options.gridLines.lineWidth;
+ this.ctx.strokeStyle = this.options.gridLines.color;
+ setContextLineSettings = false;
+ }
+
+ yLineValue += helpers.aliasPixel(this.ctx.lineWidth);
+
+ // Draw the label area
+ this.ctx.beginPath();
+
+ if (this.options.gridLines.drawTicks) {
+ this.ctx.moveTo(xTickStart, yLineValue);
+ this.ctx.lineTo(xTickEnd, yLineValue);
+ }
+
+ // Draw the chart area
+ if (this.options.gridLines.drawOnChartArea) {
+ this.ctx.moveTo(chartArea.left, yLineValue);
+ this.ctx.lineTo(chartArea.right, yLineValue);
+ }
+
+ // Need to stroke in the loop because we are potentially changing line widths & colours
+ this.ctx.stroke();
+ }
+
+ if (this.options.ticks.display) {
+ var xLabelValue;
+ var yLabelValue = this.getPixelForTick(index, this.options.gridLines.offsetGridLines); // x values for ticks (need to consider offsetLabel option)
+
+ this.ctx.save();
+
+ if (this.options.position === "left") {
+ if (this.options.ticks.mirror) {
+ xLabelValue = this.right + this.options.ticks.padding;
+ this.ctx.textAlign = "left";
+ } else {
+ xLabelValue = this.right - this.options.ticks.padding;
+ this.ctx.textAlign = "right";
+ }
+ } else {
+ // right side
+ if (this.options.ticks.mirror) {
+ xLabelValue = this.left - this.options.ticks.padding;
+ this.ctx.textAlign = "right";
+ } else {
+ xLabelValue = this.left + this.options.ticks.padding;
+ this.ctx.textAlign = "left";
+ }
+ }
+
+ this.ctx.translate(xLabelValue, yLabelValue);
+ this.ctx.rotate(helpers.toRadians(this.labelRotation) * -1);
+ this.ctx.font = labelFont;
+ this.ctx.textBaseline = "middle";
+ this.ctx.fillText(label, 0, 0);
+ this.ctx.restore();
+ }
+ }, this);
+
+ if (this.options.scaleLabel.display) {
+ // Draw the scale label
+ scaleLabelX = this.options.position === 'left' ? this.left + (this.options.scaleLabel.fontSize / 2) : this.right - (this.options.scaleLabel.fontSize / 2);
+ scaleLabelY = this.top + ((this.bottom - this.top) / 2);
+ var rotation = this.options.position === 'left' ? -0.5 * Math.PI : 0.5 * Math.PI;
+
+ this.ctx.save();
+ this.ctx.translate(scaleLabelX, scaleLabelY);
+ this.ctx.rotate(rotation);
+ this.ctx.textAlign = "center";
+ this.ctx.fillStyle = this.options.scaleLabel.fontColor; // render in correct colour
+ this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
+ this.ctx.textBaseline = 'middle';
+ this.ctx.fillText(this.options.scaleLabel.labelString, 0, 0);
+ this.ctx.restore();
+ }
+ }
+
+ // Draw the line at the edge of the axis
+ this.ctx.lineWidth = this.options.gridLines.lineWidth;
+ this.ctx.strokeStyle = this.options.gridLines.color;
+ var x1 = this.left,
+ x2 = this.right,
+ y1 = this.top,
+ y2 = this.bottom;
+
+ if (this.isHorizontal()) {
+ y1 = y2 = this.options.position === 'top' ? this.bottom : this.top;
+ y1 += helpers.aliasPixel(this.ctx.lineWidth);
+ y2 += helpers.aliasPixel(this.ctx.lineWidth);
+ } else {
+ x1 = x2 = this.options.position === 'left' ? this.right : this.left;
+ x1 += helpers.aliasPixel(this.ctx.lineWidth);
+ x2 += helpers.aliasPixel(this.ctx.lineWidth);
+ }
+
+ this.ctx.beginPath();
+ this.ctx.moveTo(x1, y1);
+ this.ctx.lineTo(x2, y2);
+ this.ctx.stroke();
+ }
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
+ var helpers = Chart.helpers;
- Chart.scaleService = {
- // Scale registration object. Extensions can register new scale types (such as log or DB scales) and then
- // use the new chart options to grab the correct scale
- constructors: {},
- // Use a registration function so that we can move to an ES6 map when we no longer need to support
- // old browsers
+ Chart.scaleService = {
+ // Scale registration object. Extensions can register new scale types (such as log or DB scales) and then
+ // use the new chart options to grab the correct scale
+ constructors: {},
+ // Use a registration function so that we can move to an ES6 map when we no longer need to support
+ // old browsers
- // Scale config defaults
- defaults: {},
- registerScaleType: function(type, scaleConstructor, defaults) {
- this.constructors[type] = scaleConstructor;
- this.defaults[type] = helpers.clone(defaults);
- },
- getScaleConstructor: function(type) {
- return this.constructors.hasOwnProperty(type) ? this.constructors[type] : undefined;
- },
- getScaleDefaults: function(type) {
- // Return the scale defaults merged with the global settings so that we always use the latest ones
- return this.defaults.hasOwnProperty(type) ? helpers.scaleMerge(Chart.defaults.scale, this.defaults[type]) : {};
- },
- addScalesToLayout: function(chartInstance) {
- // Adds each scale to the chart.boxes array to be sized accordingly
- helpers.each(chartInstance.scales, function(scale) {
- Chart.layoutService.addBox(chartInstance, scale);
- });
- },
- };
-};
+ // Scale config defaults
+ defaults: {},
+ registerScaleType: function(type, scaleConstructor, defaults) {
+ this.constructors[type] = scaleConstructor;
+ this.defaults[type] = helpers.clone(defaults);
+ },
+ getScaleConstructor: function(type) {
+ return this.constructors.hasOwnProperty(type) ? this.constructors[type] : undefined;
+ },
+ getScaleDefaults: function(type) {
+ // Return the scale defaults merged with the global settings so that we always use the latest ones
+ return this.defaults.hasOwnProperty(type) ? helpers.scaleMerge(Chart.defaults.scale, this.defaults[type]) : {};
+ },
+ addScalesToLayout: function(chartInstance) {
+ // Adds each scale to the chart.boxes array to be sized accordingly
+ helpers.each(chartInstance.scales, function(scale) {
+ Chart.layoutService.addBox(chartInstance, scale);
+ });
+ }
+ };
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.title = {
- display: false,
- position: 'top',
- fullWidth: true, // marks that this box should take the full width of the canvas (pushing down other boxes)
-
- fontColor: Chart.defaults.global.defaultFontColor,
- fontFamily: Chart.defaults.global.defaultFontFamily,
- fontSize: Chart.defaults.global.defaultFontSize,
- fontStyle: 'bold',
- padding: 10,
-
- // actual title
- text: '',
- };
-
- Chart.Title = Chart.Element.extend({
-
- initialize: function(config) {
- helpers.extend(this, config);
- this.options = helpers.configMerge(Chart.defaults.global.title, config.options);
-
- // Contains hit boxes for each dataset (in dataset order)
- this.legendHitBoxes = [];
- },
-
- // These methods are ordered by lifecyle. Utilities then follow.
-
- beforeUpdate: helpers.noop,
- update: function(maxWidth, maxHeight, margins) {
-
- // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
- this.beforeUpdate();
-
- // Absorb the master measurements
- this.maxWidth = maxWidth;
- this.maxHeight = maxHeight;
- this.margins = margins;
-
- // Dimensions
- this.beforeSetDimensions();
- this.setDimensions();
- this.afterSetDimensions();
- // Labels
- this.beforeBuildLabels();
- this.buildLabels();
- this.afterBuildLabels();
-
- // Fit
- this.beforeFit();
- this.fit();
- this.afterFit();
- //
- this.afterUpdate();
-
- return this.minSize;
-
- },
- afterUpdate: helpers.noop,
-
- //
-
- beforeSetDimensions: helpers.noop,
- setDimensions: function() {
- // Set the unconstrained dimension before label rotation
- if (this.isHorizontal()) {
- // Reset position before calculating rotation
- this.width = this.maxWidth;
- this.left = 0;
- this.right = this.width;
- } else {
- this.height = this.maxHeight;
-
- // Reset position before calculating rotation
- this.top = 0;
- this.bottom = this.height;
- }
-
- // Reset padding
- this.paddingLeft = 0;
- this.paddingTop = 0;
- this.paddingRight = 0;
- this.paddingBottom = 0;
-
- // Reset minSize
- this.minSize = {
- width: 0,
- height: 0,
- };
- },
- afterSetDimensions: helpers.noop,
-
- //
-
- beforeBuildLabels: helpers.noop,
- buildLabels: helpers.noop,
- afterBuildLabels: helpers.noop,
-
- //
-
- beforeFit: helpers.noop,
- fit: function() {
-
- var ctx = this.ctx;
- var titleFont = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
-
- // Width
- if (this.isHorizontal()) {
- this.minSize.width = this.maxWidth; // fill all the width
- } else {
- this.minSize.width = 0;
- }
-
- // height
- if (this.isHorizontal()) {
- this.minSize.height = 0;
- } else {
- this.minSize.height = this.maxHeight; // fill all the height
- }
-
- // Increase sizes here
- if (this.isHorizontal()) {
-
- // Title
- if (this.options.display) {
- this.minSize.height += this.options.fontSize + (this.options.padding * 2);
- }
- } else {
- // TODO vertical
- }
-
- this.width = this.minSize.width;
- this.height = this.minSize.height;
-
- },
- afterFit: helpers.noop,
-
- // Shared Methods
- isHorizontal: function() {
- return this.options.position == "top" || this.options.position == "bottom";
- },
-
- // Actualy draw the title block on the canvas
- draw: function() {
- if (this.options.display) {
- var ctx = this.ctx;
- var titleX, titleY;
-
- // Horizontal
- if (this.isHorizontal()) {
- // Title
- if (this.options.display) {
-
- ctx.textAlign = "center";
- ctx.textBaseline = 'middle';
- ctx.fillStyle = this.options.fontColor; // render in correct colour
- ctx.font = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
-
- titleX = this.left + ((this.right - this.left) / 2); // midpoint of the width
- titleY = this.top + ((this.bottom - this.top) / 2); // midpoint of the height
-
- ctx.fillText(this.options.text, titleX, titleY);
- }
- } else {
-
- // Title
- if (this.options.display) {
- titleX = this.options.position == 'left' ? this.left + (this.options.fontSize / 2) : this.right - (this.options.fontSize / 2);
- titleY = this.top + ((this.bottom - this.top) / 2);
- var rotation = this.options.position == 'left' ? -0.5 * Math.PI : 0.5 * Math.PI;
-
- ctx.save();
- ctx.translate(titleX, titleY);
- ctx.rotate(rotation);
- ctx.textAlign = "center";
- ctx.fillStyle = this.options.fontColor; // render in correct colour
- ctx.font = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
- ctx.textBaseline = 'middle';
- ctx.fillText(this.options.text, 0, 0);
- ctx.restore();
-
- }
-
- }
- }
- }
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.title = {
+ display: false,
+ position: 'top',
+ fullWidth: true, // marks that this box should take the full width of the canvas (pushing down other boxes)
+
+ fontColor: Chart.defaults.global.defaultFontColor,
+ fontFamily: Chart.defaults.global.defaultFontFamily,
+ fontSize: Chart.defaults.global.defaultFontSize,
+ fontStyle: 'bold',
+ padding: 10,
+
+ // actual title
+ text: ''
+ };
+
+ Chart.Title = Chart.Element.extend({
+
+ initialize: function(config) {
+ helpers.extend(this, config);
+ this.options = helpers.configMerge(Chart.defaults.global.title, config.options);
+
+ // Contains hit boxes for each dataset (in dataset order)
+ this.legendHitBoxes = [];
+ },
+
+ // These methods are ordered by lifecyle. Utilities then follow.
+
+ beforeUpdate: helpers.noop,
+ update: function(maxWidth, maxHeight, margins) {
+
+ // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
+ this.beforeUpdate();
+
+ // Absorb the master measurements
+ this.maxWidth = maxWidth;
+ this.maxHeight = maxHeight;
+ this.margins = margins;
+
+ // Dimensions
+ this.beforeSetDimensions();
+ this.setDimensions();
+ this.afterSetDimensions();
+ // Labels
+ this.beforeBuildLabels();
+ this.buildLabels();
+ this.afterBuildLabels();
+
+ // Fit
+ this.beforeFit();
+ this.fit();
+ this.afterFit();
+ //
+ this.afterUpdate();
+
+ return this.minSize;
+
+ },
+ afterUpdate: helpers.noop,
+
+ //
+
+ beforeSetDimensions: helpers.noop,
+ setDimensions: function() {
+ // Set the unconstrained dimension before label rotation
+ if (this.isHorizontal()) {
+ // Reset position before calculating rotation
+ this.width = this.maxWidth;
+ this.left = 0;
+ this.right = this.width;
+ } else {
+ this.height = this.maxHeight;
+
+ // Reset position before calculating rotation
+ this.top = 0;
+ this.bottom = this.height;
+ }
+
+ // Reset padding
+ this.paddingLeft = 0;
+ this.paddingTop = 0;
+ this.paddingRight = 0;
+ this.paddingBottom = 0;
+
+ // Reset minSize
+ this.minSize = {
+ width: 0,
+ height: 0
+ };
+ },
+ afterSetDimensions: helpers.noop,
+
+ //
+
+ beforeBuildLabels: helpers.noop,
+ buildLabels: helpers.noop,
+ afterBuildLabels: helpers.noop,
+
+ //
+
+ beforeFit: helpers.noop,
+ fit: function() {
+
+ var ctx = this.ctx;
+ var titleFont = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
+
+ // Width
+ if (this.isHorizontal()) {
+ this.minSize.width = this.maxWidth; // fill all the width
+ } else {
+ this.minSize.width = 0;
+ }
+
+ // height
+ if (this.isHorizontal()) {
+ this.minSize.height = 0;
+ } else {
+ this.minSize.height = this.maxHeight; // fill all the height
+ }
+
+ // Increase sizes here
+ if (this.isHorizontal()) {
+
+ // Title
+ if (this.options.display) {
+ this.minSize.height += this.options.fontSize + (this.options.padding * 2);
+ }
+ } else {
+ // TODO vertical
+ }
+
+ this.width = this.minSize.width;
+ this.height = this.minSize.height;
+
+ },
+ afterFit: helpers.noop,
+
+ // Shared Methods
+ isHorizontal: function() {
+ return this.options.position === "top" || this.options.position === "bottom";
+ },
+
+ // Actualy draw the title block on the canvas
+ draw: function() {
+ if (this.options.display) {
+ var ctx = this.ctx;
+ var titleX, titleY;
+
+ // Horizontal
+ if (this.isHorizontal()) {
+ // Title
+ if (this.options.display) {
+
+ ctx.textAlign = "center";
+ ctx.textBaseline = 'middle';
+ ctx.fillStyle = this.options.fontColor; // render in correct colour
+ ctx.font = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
+
+ titleX = this.left + ((this.right - this.left) / 2); // midpoint of the width
+ titleY = this.top + ((this.bottom - this.top) / 2); // midpoint of the height
+
+ ctx.fillText(this.options.text, titleX, titleY);
+ }
+ } else {
+
+ // Title
+ if (this.options.display) {
+ titleX = this.options.position === 'left' ? this.left + (this.options.fontSize / 2) : this.right - (this.options.fontSize / 2);
+ titleY = this.top + ((this.bottom - this.top) / 2);
+ var rotation = this.options.position === 'left' ? -0.5 * Math.PI : 0.5 * Math.PI;
+
+ ctx.save();
+ ctx.translate(titleX, titleY);
+ ctx.rotate(rotation);
+ ctx.textAlign = "center";
+ ctx.fillStyle = this.options.fontColor; // render in correct colour
+ ctx.font = helpers.fontString(this.options.fontSize, this.options.fontStyle, this.options.fontFamily);
+ ctx.textBaseline = 'middle';
+ ctx.fillText(this.options.text, 0, 0);
+ ctx.restore();
+
+ }
+
+ }
+ }
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.tooltips = {
- enabled: true,
- custom: null,
- mode: 'single',
- backgroundColor: "rgba(0,0,0,0.8)",
- titleFontFamily: Chart.defaults.global.defaultFontFamily,
- titleFontSize: Chart.defaults.global.defaultFontSize,
- titleFontStyle: "bold",
- titleSpacing: 2,
- titleMarginBottom: 6,
- titleColor: "#fff",
- titleAlign: "left",
- bodyFontFamily: Chart.defaults.global.defaultFontFamily,
- bodyFontSize: Chart.defaults.global.defaultFontSize,
- bodyFontStyle: Chart.defaults.global.defaultFontStyle,
- bodySpacing: 2,
- bodyColor: "#fff",
- bodyAlign: "left",
- footerFontFamily: Chart.defaults.global.defaultFontFamily,
- footerFontSize: Chart.defaults.global.defaultFontSize,
- footerFontStyle: "bold",
- footerSpacing: 2,
- footerMarginTop: 6,
- footerColor: "#fff",
- footerAlign: "left",
- yPadding: 6,
- xPadding: 6,
- caretSize: 5,
- cornerRadius: 6,
- multiKeyBackground: '#fff',
- callbacks: {
- // Args are: (tooltipItems, data)
- beforeTitle: helpers.noop,
- title: function(tooltipItems, data) {
- // Pick first xLabel for now
- var title = '';
-
- if (tooltipItems.length > 0) {
- if (tooltipItems[0].xLabel) {
- title = tooltipItems[0].xLabel;
- } else if (data.labels.length > 0 && tooltipItems[0].index < data.labels.length) {
- title = data.labels[tooltipItems[0].index];
- }
- }
-
- return title;
- },
- afterTitle: helpers.noop,
-
- // Args are: (tooltipItems, data)
- beforeBody: helpers.noop,
-
- // Args are: (tooltipItem, data)
- beforeLabel: helpers.noop,
- label: function(tooltipItem, data) {
- var datasetLabel = data.datasets[tooltipItem.datasetIndex].label || '';
- return datasetLabel + ': ' + tooltipItem.yLabel;
- },
- afterLabel: helpers.noop,
-
- // Args are: (tooltipItems, data)
- afterBody: helpers.noop,
-
- // Args are: (tooltipItems, data)
- beforeFooter: helpers.noop,
- footer: helpers.noop,
- afterFooter: helpers.noop,
- },
- };
-
- // Helper to push or concat based on if the 2nd parameter is an array or not
- function pushOrConcat(base, toPush) {
- if (toPush) {
- if (helpers.isArray(toPush)) {
- base = base.concat(toPush);
- } else {
- base.push(toPush);
- }
- }
-
- return base;
- }
-
- Chart.Tooltip = Chart.Element.extend({
- initialize: function() {
- var options = this._options;
- helpers.extend(this, {
- _model: {
- // Positioning
- xPadding: options.tooltips.xPadding,
- yPadding: options.tooltips.yPadding,
-
- // Body
- bodyColor: options.tooltips.bodyColor,
- _bodyFontFamily: options.tooltips.bodyFontFamily,
- _bodyFontStyle: options.tooltips.bodyFontStyle,
- _bodyAlign: options.tooltips.bodyAlign,
- bodyFontSize: options.tooltips.bodyFontSize,
- bodySpacing: options.tooltips.bodySpacing,
-
- // Title
- titleColor: options.tooltips.titleColor,
- _titleFontFamily: options.tooltips.titleFontFamily,
- _titleFontStyle: options.tooltips.titleFontStyle,
- titleFontSize: options.tooltips.titleFontSize,
- _titleAlign: options.tooltips.titleAlign,
- titleSpacing: options.tooltips.titleSpacing,
- titleMarginBottom: options.tooltips.titleMarginBottom,
-
- // Footer
- footerColor: options.tooltips.footerColor,
- _footerFontFamily: options.tooltips.footerFontFamily,
- _footerFontStyle: options.tooltips.footerFontStyle,
- footerFontSize: options.tooltips.footerFontSize,
- _footerAlign: options.tooltips.footerAlign,
- footerSpacing: options.tooltips.footerSpacing,
- footerMarginTop: options.tooltips.footerMarginTop,
-
- // Appearance
- caretSize: options.tooltips.caretSize,
- cornerRadius: options.tooltips.cornerRadius,
- backgroundColor: options.tooltips.backgroundColor,
- opacity: 0,
- legendColorBackground: options.tooltips.multiKeyBackground,
- },
- });
- },
-
- // Get the title
- // Args are: (tooltipItem, data)
- getTitle: function() {
- var beforeTitle = this._options.tooltips.callbacks.beforeTitle.apply(this, arguments),
- title = this._options.tooltips.callbacks.title.apply(this, arguments),
- afterTitle = this._options.tooltips.callbacks.afterTitle.apply(this, arguments);
-
- var lines = [];
- lines = pushOrConcat(lines, beforeTitle);
- lines = pushOrConcat(lines, title);
- lines = pushOrConcat(lines, afterTitle);
-
- return lines;
- },
-
- // Args are: (tooltipItem, data)
- getBeforeBody: function() {
- var lines = this._options.tooltips.callbacks.beforeBody.apply(this, arguments);
- return helpers.isArray(lines) ? lines : lines !== undefined ? [lines] : [];
- },
-
- // Args are: (tooltipItem, data)
- getBody: function(tooltipItems, data) {
- var lines = [];
-
- helpers.each(tooltipItems, function(bodyItem) {
- helpers.pushAllIfDefined(this._options.tooltips.callbacks.beforeLabel.call(this, bodyItem, data), lines);
- helpers.pushAllIfDefined(this._options.tooltips.callbacks.label.call(this, bodyItem, data), lines);
- helpers.pushAllIfDefined(this._options.tooltips.callbacks.afterLabel.call(this, bodyItem, data), lines);
- }, this);
-
- return lines;
- },
-
- // Args are: (tooltipItem, data)
- getAfterBody: function() {
- var lines = this._options.tooltips.callbacks.afterBody.apply(this, arguments);
- return helpers.isArray(lines) ? lines : lines !== undefined ? [lines] : [];
- },
-
- // Get the footer and beforeFooter and afterFooter lines
- // Args are: (tooltipItem, data)
- getFooter: function() {
- var beforeFooter = this._options.tooltips.callbacks.beforeFooter.apply(this, arguments);
- var footer = this._options.tooltips.callbacks.footer.apply(this, arguments);
- var afterFooter = this._options.tooltips.callbacks.afterFooter.apply(this, arguments);
-
- var lines = [];
- lines = pushOrConcat(lines, beforeFooter);
- lines = pushOrConcat(lines, footer);
- lines = pushOrConcat(lines, afterFooter);
-
- return lines;
- },
-
- getAveragePosition: function(elements) {
-
- if (!elements.length) {
- return false;
- }
-
- var xPositions = [];
- var yPositions = [];
-
- helpers.each(elements, function(el) {
- if (el) {
- var pos = el.tooltipPosition();
- xPositions.push(pos.x);
- yPositions.push(pos.y);
- }
- });
-
- var x = 0,
- y = 0;
- for (var i = 0; i < xPositions.length; i++) {
- x += xPositions[i];
- y += yPositions[i];
- }
-
- return {
- x: Math.round(x / xPositions.length),
- y: Math.round(y / xPositions.length)
- };
-
- },
-
- update: function(changed) {
- if (this._active.length) {
- this._model.opacity = 1;
-
- var element = this._active[0],
- labelColors = [],
- tooltipPosition;
-
- var tooltipItems = [];
-
- if (this._options.tooltips.mode === 'single') {
- var yScale = element._yScale || element._scale; // handle radar || polarArea charts
- tooltipItems.push({
- xLabel: element._xScale ? element._xScale.getLabelForIndex(element._index, element._datasetIndex) : '',
- yLabel: yScale ? yScale.getLabelForIndex(element._index, element._datasetIndex) : '',
- index: element._index,
- datasetIndex: element._datasetIndex,
- });
- tooltipPosition = this.getAveragePosition(this._active);
- } else {
- helpers.each(this._data.datasets, function(dataset, datasetIndex) {
- if (!helpers.isDatasetVisible(dataset)) {
- return;
- }
- var currentElement = dataset.metaData[element._index];
- if (currentElement) {
- var yScale = element._yScale || element._scale; // handle radar || polarArea charts
-
- tooltipItems.push({
- xLabel: currentElement._xScale ? currentElement._xScale.getLabelForIndex(currentElement._index, currentElement._datasetIndex) : '',
- yLabel: yScale ? yScale.getLabelForIndex(currentElement._index, currentElement._datasetIndex) : '',
- index: element._index,
- datasetIndex: datasetIndex,
- });
- }
- });
-
- helpers.each(this._active, function(active) {
- if (active) {
- labelColors.push({
- borderColor: active._view.borderColor,
- backgroundColor: active._view.backgroundColor
- });
- }
- });
-
- tooltipPosition = this.getAveragePosition(this._active);
- tooltipPosition.y = this._active[0]._yScale.getPixelForDecimal(0.5);
- }
-
- // Build the Text Lines
- helpers.extend(this._model, {
- title: this.getTitle(tooltipItems, this._data),
- beforeBody: this.getBeforeBody(tooltipItems, this._data),
- body: this.getBody(tooltipItems, this._data),
- afterBody: this.getAfterBody(tooltipItems, this._data),
- footer: this.getFooter(tooltipItems, this._data),
- });
-
- helpers.extend(this._model, {
- x: Math.round(tooltipPosition.x),
- y: Math.round(tooltipPosition.y),
- caretPadding: helpers.getValueOrDefault(tooltipPosition.padding, 2),
- labelColors: labelColors,
- });
-
- // We need to determine alignment of
- var tooltipSize = this.getTooltipSize(this._model);
- this.determineAlignment(tooltipSize); // Smart Tooltip placement to stay on the canvas
-
- helpers.extend(this._model, this.getBackgroundPoint(this._model, tooltipSize));
- } else {
- this._model.opacity = 0;
- }
-
- if (changed && this._options.tooltips.custom) {
- this._options.tooltips.custom.call(this, this._model);
- }
-
- return this;
- },
- getTooltipSize: function getTooltipSize(vm) {
- var ctx = this._chart.ctx;
-
- var size = {
- height: vm.yPadding * 2, // Tooltip Padding
- width: 0
- };
- var combinedBodyLength = vm.body.length + vm.beforeBody.length + vm.afterBody.length;
-
- size.height += vm.title.length * vm.titleFontSize; // Title Lines
- size.height += (vm.title.length - 1) * vm.titleSpacing; // Title Line Spacing
- size.height += vm.title.length ? vm.titleMarginBottom : 0; // Title's bottom Margin
- size.height += combinedBodyLength * vm.bodyFontSize; // Body Lines
- size.height += combinedBodyLength ? (combinedBodyLength - 1) * vm.bodySpacing : 0; // Body Line Spacing
- size.height += vm.footer.length ? vm.footerMarginTop : 0; // Footer Margin
- size.height += vm.footer.length * (vm.footerFontSize); // Footer Lines
- size.height += vm.footer.length ? (vm.footer.length - 1) * vm.footerSpacing : 0; // Footer Line Spacing
-
- // Width
- ctx.font = helpers.fontString(vm.titleFontSize, vm._titleFontStyle, vm._titleFontFamily);
- helpers.each(vm.title, function(line) {
- size.width = Math.max(size.width, ctx.measureText(line).width);
- });
-
- ctx.font = helpers.fontString(vm.bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);
- helpers.each(vm.beforeBody.concat(vm.afterBody), function(line) {
- size.width = Math.max(size.width, ctx.measureText(line).width);
- });
- helpers.each(vm.body, function(line) {
- size.width = Math.max(size.width, ctx.measureText(line).width + (this._options.tooltips.mode !== 'single' ? (vm.bodyFontSize + 2) : 0));
- }, this);
-
- ctx.font = helpers.fontString(vm.footerFontSize, vm._footerFontStyle, vm._footerFontFamily);
- helpers.each(vm.footer, function(line) {
- size.width = Math.max(size.width, ctx.measureText(line).width);
- });
- size.width += 2 * vm.xPadding;
-
- return size;
- },
- determineAlignment: function determineAlignment(size) {
- this._model.xAlign = this._model.yAlign = "center";
-
- if (this._model.y < size.height) {
- this._model.yAlign = 'top';
- } else if (this._model.y > (this._chart.height - size.height)) {
- this._model.yAlign = 'bottom';
- }
-
- var lf, rf; // functions to determine left, right alignment
- var olf, orf; // functions to determine if left/right alignment causes tooltip to go outside chart
- var yf; // function to get the y alignment if the tooltip goes outside of the left or right edges
- var _this = this;
- var midX = (this._chartInstance.chartArea.left + this._chartInstance.chartArea.right) / 2;
- var midY = (this._chartInstance.chartArea.top + this._chartInstance.chartArea.bottom) / 2;
-
- if (this._model.yAlign === 'center') {
- lf = function(x) {
- return x <= midX;
- };
- rf = function(x) {
- return x > midX;
- };
- } else {
- lf = function(x) {
- return x <= (size.width / 2);
- };
- rf = function(x) {
- return x >= (_this._chart.width - (size.width / 2));
- };
- }
-
- olf = function(x) {
- return x + size.width > _this._chart.width;
- };
- orf = function(x) {
- return x - size.width < 0;
- };
- yf = function(y) {
- return y <= midY ? 'top' : 'bottom';
- };
-
- if (lf(this._model.x)) {
- this._model.xAlign = 'left';
-
- // Is tooltip too wide and goes over the right side of the chart.?
- if (olf(this._model.x)) {
- this._model.xAlign = 'center';
- this._model.yAlign = yf(this._model.y);
- }
- } else if (rf(this._model.x)) {
- this._model.xAlign = 'right';
-
- // Is tooltip too wide and goes outside left edge of canvas?
- if (orf(this._model.x)) {
- this._model.xAlign = 'center';
- this._model.yAlign = yf(this._model.y);
- }
- }
- },
- getBackgroundPoint: function getBackgroundPoint(vm, size) {
- // Background Position
- var pt = {
- x: vm.x,
- y: vm.y
- };
-
- if (vm.xAlign === 'right') {
- pt.x -= size.width;
- } else if (vm.xAlign === 'center') {
- pt.x -= (size.width / 2);
- }
-
- if (vm.yAlign === 'top') {
- pt.y += vm.caretPadding + vm.caretSize;
- } else if (vm.yAlign === 'bottom') {
- pt.y -= size.height + vm.caretPadding + vm.caretSize;
- } else {
- pt.y -= (size.height / 2);
- }
-
- if (vm.yAlign == 'center') {
- if (vm.xAlign === 'left') {
- pt.x += vm.caretPadding + vm.caretSize;
- } else if (vm.xAlign === 'right') {
- pt.x -= vm.caretPadding + vm.caretSize;
- }
- } else {
- if (vm.xAlign === 'left') {
- pt.x -= vm.cornerRadius + vm.caretPadding;
- } else if (vm.xAlign === 'right') {
- pt.x += vm.cornerRadius + vm.caretPadding;
- }
- }
-
- return pt;
- },
- drawCaret: function drawCaret(tooltipPoint, size, opacity, caretPadding) {
- var vm = this._view;
- var ctx = this._chart.ctx;
- var x1, x2, x3;
- var y1, y2, y3;
-
- if (vm.yAlign === 'center') {
- // Left or right side
- if (vm.xAlign === 'left') {
- x1 = tooltipPoint.x;
- x2 = x1 - vm.caretSize;
- x3 = x1;
- } else {
- x1 = tooltipPoint.x + size.width;
- x2 = x1 + vm.caretSize;
- x3 = x1;
- }
-
- y2 = tooltipPoint.y + (size.height / 2);
- y1 = y2 - vm.caretSize;
- y3 = y2 + vm.caretSize;
- } else {
- if (vm.xAlign === 'left') {
- x1 = tooltipPoint.x + vm.cornerRadius;
- x2 = x1 + vm.caretSize;
- x3 = x2 + vm.caretSize;
- } else if (vm.xAlign === 'right') {
- x1 = tooltipPoint.x + size.width - vm.cornerRadius;
- x2 = x1 - vm.caretSize;
- x3 = x2 - vm.caretSize;
- } else {
- x2 = tooltipPoint.x + (size.width / 2);
- x1 = x2 - vm.caretSize;
- x3 = x2 + vm.caretSize;
- }
-
- if (vm.yAlign === 'top') {
- y1 = tooltipPoint.y;
- y2 = y1 - vm.caretSize;
- y3 = y1;
- } else {
- y1 = tooltipPoint.y + size.height;
- y2 = y1 + vm.caretSize;
- y3 = y1;
- }
- }
-
- ctx.fillStyle = helpers.color(vm.backgroundColor).alpha(opacity).rgbString();
- ctx.beginPath();
- ctx.moveTo(x1, y1);
- ctx.lineTo(x2, y2);
- ctx.lineTo(x3, y3);
- ctx.closePath();
- ctx.fill();
- },
- drawTitle: function drawTitle(pt, vm, ctx, opacity) {
- if (vm.title.length) {
- ctx.textAlign = vm._titleAlign;
- ctx.textBaseline = "top";
- ctx.fillStyle = helpers.color(vm.titleColor).alpha(opacity).rgbString();
- ctx.font = helpers.fontString(vm.titleFontSize, vm._titleFontStyle, vm._titleFontFamily);
-
- helpers.each(vm.title, function(title, i) {
- ctx.fillText(title, pt.x, pt.y);
- pt.y += vm.titleFontSize + vm.titleSpacing; // Line Height and spacing
-
- if (i + 1 === vm.title.length) {
- pt.y += vm.titleMarginBottom - vm.titleSpacing; // If Last, add margin, remove spacing
- }
- });
- }
- },
- drawBody: function drawBody(pt, vm, ctx, opacity) {
- ctx.textAlign = vm._bodyAlign;
- ctx.textBaseline = "top";
- ctx.fillStyle = helpers.color(vm.bodyColor).alpha(opacity).rgbString();
- ctx.font = helpers.fontString(vm.bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);
-
- // Before Body
- helpers.each(vm.beforeBody, function(beforeBody) {
- ctx.fillText(beforeBody, pt.x, pt.y);
- pt.y += vm.bodyFontSize + vm.bodySpacing;
- });
-
- helpers.each(vm.body, function(body, i) {
- // Draw Legend-like boxes if needed
- if (this._options.tooltips.mode !== 'single') {
- // Fill a white rect so that colours merge nicely if the opacity is < 1
- ctx.fillStyle = helpers.color(vm.legendColorBackground).alpha(opacity).rgbaString();
- ctx.fillRect(pt.x, pt.y, vm.bodyFontSize, vm.bodyFontSize);
-
- // Border
- ctx.strokeStyle = helpers.color(vm.labelColors[i].borderColor).alpha(opacity).rgbaString();
- ctx.strokeRect(pt.x, pt.y, vm.bodyFontSize, vm.bodyFontSize);
-
- // Inner square
- ctx.fillStyle = helpers.color(vm.labelColors[i].backgroundColor).alpha(opacity).rgbaString();
- ctx.fillRect(pt.x + 1, pt.y + 1, vm.bodyFontSize - 2, vm.bodyFontSize - 2);
-
- ctx.fillStyle = helpers.color(vm.bodyColor).alpha(opacity).rgbaString(); // Return fill style for text
- }
-
- // Body Line
- ctx.fillText(body, pt.x + (this._options.tooltips.mode !== 'single' ? (vm.bodyFontSize + 2) : 0), pt.y);
-
- pt.y += vm.bodyFontSize + vm.bodySpacing;
- }, this);
-
- // After Body
- helpers.each(vm.afterBody, function(afterBody) {
- ctx.fillText(afterBody, pt.x, pt.y);
- pt.y += vm.bodyFontSize;
- });
-
- pt.y -= vm.bodySpacing; // Remove last body spacing
- },
- drawFooter: function drawFooter(pt, vm, ctx, opacity) {
- if (vm.footer.length) {
- pt.y += vm.footerMarginTop;
-
- ctx.textAlign = vm._footerAlign;
- ctx.textBaseline = "top";
- ctx.fillStyle = helpers.color(vm.footerColor).alpha(opacity).rgbString();
- ctx.font = helpers.fontString(vm.footerFontSize, vm._footerFontStyle, vm._footerFontFamily);
-
- helpers.each(vm.footer, function(footer) {
- ctx.fillText(footer, pt.x, pt.y);
- pt.y += vm.footerFontSize + vm.footerSpacing;
- });
- }
- },
- draw: function draw() {
- var ctx = this._chart.ctx;
- var vm = this._view;
-
- if (vm.opacity === 0) {
- return;
- }
-
- var caretPadding = vm.caretPadding;
- var tooltipSize = this.getTooltipSize(vm);
- var pt = {
- x: vm.x,
- y: vm.y
- };
-
- // IE11/Edge does not like very small opacities, so snap to 0
- var opacity = Math.abs(vm.opacity < 1e-3) ? 0 : vm.opacity;
-
- if (this._options.tooltips.enabled) {
- // Draw Background
- ctx.fillStyle = helpers.color(vm.backgroundColor).alpha(opacity).rgbString();
- helpers.drawRoundedRectangle(ctx, pt.x, pt.y, tooltipSize.width, tooltipSize.height, vm.cornerRadius);
- ctx.fill();
-
- // Draw Caret
- this.drawCaret(pt, tooltipSize, opacity, caretPadding);
-
- // Draw Title, Body, and Footer
- pt.x += vm.xPadding;
- pt.y += vm.yPadding;
-
- // Titles
- this.drawTitle(pt, vm, ctx, opacity);
-
- // Body
- this.drawBody(pt, vm, ctx, opacity);
-
- // Footer
- this.drawFooter(pt, vm, ctx, opacity);
- }
- }
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.tooltips = {
+ enabled: true,
+ custom: null,
+ mode: 'single',
+ backgroundColor: "rgba(0,0,0,0.8)",
+ titleFontFamily: Chart.defaults.global.defaultFontFamily,
+ titleFontSize: Chart.defaults.global.defaultFontSize,
+ titleFontStyle: "bold",
+ titleSpacing: 2,
+ titleMarginBottom: 6,
+ titleColor: "#fff",
+ titleAlign: "left",
+ bodyFontFamily: Chart.defaults.global.defaultFontFamily,
+ bodyFontSize: Chart.defaults.global.defaultFontSize,
+ bodyFontStyle: Chart.defaults.global.defaultFontStyle,
+ bodySpacing: 2,
+ bodyColor: "#fff",
+ bodyAlign: "left",
+ footerFontFamily: Chart.defaults.global.defaultFontFamily,
+ footerFontSize: Chart.defaults.global.defaultFontSize,
+ footerFontStyle: "bold",
+ footerSpacing: 2,
+ footerMarginTop: 6,
+ footerColor: "#fff",
+ footerAlign: "left",
+ yPadding: 6,
+ xPadding: 6,
+ caretSize: 5,
+ cornerRadius: 6,
+ multiKeyBackground: '#fff',
+ callbacks: {
+ // Args are: (tooltipItems, data)
+ beforeTitle: helpers.noop,
+ title: function(tooltipItems, data) {
+ // Pick first xLabel for now
+ var title = '';
+
+ if (tooltipItems.length > 0) {
+ if (tooltipItems[0].xLabel) {
+ title = tooltipItems[0].xLabel;
+ } else if (data.labels.length > 0 && tooltipItems[0].index < data.labels.length) {
+ title = data.labels[tooltipItems[0].index];
+ }
+ }
+
+ return title;
+ },
+ afterTitle: helpers.noop,
+
+ // Args are: (tooltipItems, data)
+ beforeBody: helpers.noop,
+
+ // Args are: (tooltipItem, data)
+ beforeLabel: helpers.noop,
+ label: function(tooltipItem, data) {
+ var datasetLabel = data.datasets[tooltipItem.datasetIndex].label || '';
+ return datasetLabel + ': ' + tooltipItem.yLabel;
+ },
+ afterLabel: helpers.noop,
+
+ // Args are: (tooltipItems, data)
+ afterBody: helpers.noop,
+
+ // Args are: (tooltipItems, data)
+ beforeFooter: helpers.noop,
+ footer: helpers.noop,
+ afterFooter: helpers.noop
+ }
+ };
+
+ // Helper to push or concat based on if the 2nd parameter is an array or not
+ function pushOrConcat(base, toPush) {
+ if (toPush) {
+ if (helpers.isArray(toPush)) {
+ base = base.concat(toPush);
+ } else {
+ base.push(toPush);
+ }
+ }
+
+ return base;
+ }
+
+ Chart.Tooltip = Chart.Element.extend({
+ initialize: function() {
+ var options = this._options;
+ helpers.extend(this, {
+ _model: {
+ // Positioning
+ xPadding: options.tooltips.xPadding,
+ yPadding: options.tooltips.yPadding,
+
+ // Body
+ bodyColor: options.tooltips.bodyColor,
+ _bodyFontFamily: options.tooltips.bodyFontFamily,
+ _bodyFontStyle: options.tooltips.bodyFontStyle,
+ _bodyAlign: options.tooltips.bodyAlign,
+ bodyFontSize: options.tooltips.bodyFontSize,
+ bodySpacing: options.tooltips.bodySpacing,
+
+ // Title
+ titleColor: options.tooltips.titleColor,
+ _titleFontFamily: options.tooltips.titleFontFamily,
+ _titleFontStyle: options.tooltips.titleFontStyle,
+ titleFontSize: options.tooltips.titleFontSize,
+ _titleAlign: options.tooltips.titleAlign,
+ titleSpacing: options.tooltips.titleSpacing,
+ titleMarginBottom: options.tooltips.titleMarginBottom,
+
+ // Footer
+ footerColor: options.tooltips.footerColor,
+ _footerFontFamily: options.tooltips.footerFontFamily,
+ _footerFontStyle: options.tooltips.footerFontStyle,
+ footerFontSize: options.tooltips.footerFontSize,
+ _footerAlign: options.tooltips.footerAlign,
+ footerSpacing: options.tooltips.footerSpacing,
+ footerMarginTop: options.tooltips.footerMarginTop,
+
+ // Appearance
+ caretSize: options.tooltips.caretSize,
+ cornerRadius: options.tooltips.cornerRadius,
+ backgroundColor: options.tooltips.backgroundColor,
+ opacity: 0,
+ legendColorBackground: options.tooltips.multiKeyBackground
+ }
+ });
+ },
+
+ // Get the title
+ // Args are: (tooltipItem, data)
+ getTitle: function() {
+ var beforeTitle = this._options.tooltips.callbacks.beforeTitle.apply(this, arguments),
+ title = this._options.tooltips.callbacks.title.apply(this, arguments),
+ afterTitle = this._options.tooltips.callbacks.afterTitle.apply(this, arguments);
+
+ var lines = [];
+ lines = pushOrConcat(lines, beforeTitle);
+ lines = pushOrConcat(lines, title);
+ lines = pushOrConcat(lines, afterTitle);
+
+ return lines;
+ },
+
+ // Args are: (tooltipItem, data)
+ getBeforeBody: function() {
+ var lines = this._options.tooltips.callbacks.beforeBody.apply(this, arguments);
+ return helpers.isArray(lines) ? lines : lines !== undefined ? [lines] : [];
+ },
+
+ // Args are: (tooltipItem, data)
+ getBody: function(tooltipItems, data) {
+ var lines = [];
+
+ helpers.each(tooltipItems, function(bodyItem) {
+ helpers.pushAllIfDefined(this._options.tooltips.callbacks.beforeLabel.call(this, bodyItem, data), lines);
+ helpers.pushAllIfDefined(this._options.tooltips.callbacks.label.call(this, bodyItem, data), lines);
+ helpers.pushAllIfDefined(this._options.tooltips.callbacks.afterLabel.call(this, bodyItem, data), lines);
+ }, this);
+
+ return lines;
+ },
+
+ // Args are: (tooltipItem, data)
+ getAfterBody: function() {
+ var lines = this._options.tooltips.callbacks.afterBody.apply(this, arguments);
+ return helpers.isArray(lines) ? lines : lines !== undefined ? [lines] : [];
+ },
+
+ // Get the footer and beforeFooter and afterFooter lines
+ // Args are: (tooltipItem, data)
+ getFooter: function() {
+ var beforeFooter = this._options.tooltips.callbacks.beforeFooter.apply(this, arguments);
+ var footer = this._options.tooltips.callbacks.footer.apply(this, arguments);
+ var afterFooter = this._options.tooltips.callbacks.afterFooter.apply(this, arguments);
+
+ var lines = [];
+ lines = pushOrConcat(lines, beforeFooter);
+ lines = pushOrConcat(lines, footer);
+ lines = pushOrConcat(lines, afterFooter);
+
+ return lines;
+ },
+
+ getAveragePosition: function(elements) {
+
+ if (!elements.length) {
+ return false;
+ }
+
+ var xPositions = [];
+ var yPositions = [];
+
+ helpers.each(elements, function(el) {
+ if (el) {
+ var pos = el.tooltipPosition();
+ xPositions.push(pos.x);
+ yPositions.push(pos.y);
+ }
+ });
+
+ var x = 0,
+ y = 0;
+ for (var i = 0; i < xPositions.length; i++) {
+ x += xPositions[i];
+ y += yPositions[i];
+ }
+
+ return {
+ x: Math.round(x / xPositions.length),
+ y: Math.round(y / xPositions.length)
+ };
+
+ },
+
+ update: function(changed) {
+ if (this._active.length) {
+ this._model.opacity = 1;
+
+ var element = this._active[0],
+ labelColors = [],
+ tooltipPosition;
+
+ var tooltipItems = [];
+
+ if (this._options.tooltips.mode === 'single') {
+ var yScale = element._yScale || element._scale; // handle radar || polarArea charts
+ tooltipItems.push({
+ xLabel: element._xScale ? element._xScale.getLabelForIndex(element._index, element._datasetIndex) : '',
+ yLabel: yScale ? yScale.getLabelForIndex(element._index, element._datasetIndex) : '',
+ index: element._index,
+ datasetIndex: element._datasetIndex
+ });
+ tooltipPosition = this.getAveragePosition(this._active);
+ } else {
+ helpers.each(this._data.datasets, function(dataset, datasetIndex) {
+ if (!helpers.isDatasetVisible(dataset)) {
+ return;
+ }
+ var currentElement = dataset.metaData[element._index];
+ if (currentElement) {
+ var yScale = element._yScale || element._scale; // handle radar || polarArea charts
+
+ tooltipItems.push({
+ xLabel: currentElement._xScale ? currentElement._xScale.getLabelForIndex(currentElement._index, currentElement._datasetIndex) : '',
+ yLabel: yScale ? yScale.getLabelForIndex(currentElement._index, currentElement._datasetIndex) : '',
+ index: element._index,
+ datasetIndex: datasetIndex
+ });
+ }
+ });
+
+ helpers.each(this._active, function(active) {
+ if (active) {
+ labelColors.push({
+ borderColor: active._view.borderColor,
+ backgroundColor: active._view.backgroundColor
+ });
+ }
+ });
+
+ tooltipPosition = this.getAveragePosition(this._active);
+ tooltipPosition.y = this._active[0]._yScale.getPixelForDecimal(0.5);
+ }
+
+ // Build the Text Lines
+ helpers.extend(this._model, {
+ title: this.getTitle(tooltipItems, this._data),
+ beforeBody: this.getBeforeBody(tooltipItems, this._data),
+ body: this.getBody(tooltipItems, this._data),
+ afterBody: this.getAfterBody(tooltipItems, this._data),
+ footer: this.getFooter(tooltipItems, this._data)
+ });
+
+ helpers.extend(this._model, {
+ x: Math.round(tooltipPosition.x),
+ y: Math.round(tooltipPosition.y),
+ caretPadding: helpers.getValueOrDefault(tooltipPosition.padding, 2),
+ labelColors: labelColors
+ });
+
+ // We need to determine alignment of
+ var tooltipSize = this.getTooltipSize(this._model);
+ this.determineAlignment(tooltipSize); // Smart Tooltip placement to stay on the canvas
+
+ helpers.extend(this._model, this.getBackgroundPoint(this._model, tooltipSize));
+ } else {
+ this._model.opacity = 0;
+ }
+
+ if (changed && this._options.tooltips.custom) {
+ this._options.tooltips.custom.call(this, this._model);
+ }
+
+ return this;
+ },
+ getTooltipSize: function getTooltipSize(vm) {
+ var ctx = this._chart.ctx;
+
+ var size = {
+ height: vm.yPadding * 2, // Tooltip Padding
+ width: 0
+ };
+ var combinedBodyLength = vm.body.length + vm.beforeBody.length + vm.afterBody.length;
+
+ size.height += vm.title.length * vm.titleFontSize; // Title Lines
+ size.height += (vm.title.length - 1) * vm.titleSpacing; // Title Line Spacing
+ size.height += vm.title.length ? vm.titleMarginBottom : 0; // Title's bottom Margin
+ size.height += combinedBodyLength * vm.bodyFontSize; // Body Lines
+ size.height += combinedBodyLength ? (combinedBodyLength - 1) * vm.bodySpacing : 0; // Body Line Spacing
+ size.height += vm.footer.length ? vm.footerMarginTop : 0; // Footer Margin
+ size.height += vm.footer.length * (vm.footerFontSize); // Footer Lines
+ size.height += vm.footer.length ? (vm.footer.length - 1) * vm.footerSpacing : 0; // Footer Line Spacing
+
+ // Width
+ ctx.font = helpers.fontString(vm.titleFontSize, vm._titleFontStyle, vm._titleFontFamily);
+ helpers.each(vm.title, function(line) {
+ size.width = Math.max(size.width, ctx.measureText(line).width);
+ });
+
+ ctx.font = helpers.fontString(vm.bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);
+ helpers.each(vm.beforeBody.concat(vm.afterBody), function(line) {
+ size.width = Math.max(size.width, ctx.measureText(line).width);
+ });
+ helpers.each(vm.body, function(line) {
+ size.width = Math.max(size.width, ctx.measureText(line).width + (this._options.tooltips.mode !== 'single' ? (vm.bodyFontSize + 2) : 0));
+ }, this);
+
+ ctx.font = helpers.fontString(vm.footerFontSize, vm._footerFontStyle, vm._footerFontFamily);
+ helpers.each(vm.footer, function(line) {
+ size.width = Math.max(size.width, ctx.measureText(line).width);
+ });
+ size.width += 2 * vm.xPadding;
+
+ return size;
+ },
+ determineAlignment: function determineAlignment(size) {
+ this._model.xAlign = this._model.yAlign = "center";
+
+ if (this._model.y < size.height) {
+ this._model.yAlign = 'top';
+ } else if (this._model.y > (this._chart.height - size.height)) {
+ this._model.yAlign = 'bottom';
+ }
+
+ var lf, rf; // functions to determine left, right alignment
+ var olf, orf; // functions to determine if left/right alignment causes tooltip to go outside chart
+ var yf; // function to get the y alignment if the tooltip goes outside of the left or right edges
+ var _this = this;
+ var midX = (this._chartInstance.chartArea.left + this._chartInstance.chartArea.right) / 2;
+ var midY = (this._chartInstance.chartArea.top + this._chartInstance.chartArea.bottom) / 2;
+
+ if (this._model.yAlign === 'center') {
+ lf = function(x) {
+ return x <= midX;
+ };
+ rf = function(x) {
+ return x > midX;
+ };
+ } else {
+ lf = function(x) {
+ return x <= (size.width / 2);
+ };
+ rf = function(x) {
+ return x >= (_this._chart.width - (size.width / 2));
+ };
+ }
+
+ olf = function(x) {
+ return x + size.width > _this._chart.width;
+ };
+ orf = function(x) {
+ return x - size.width < 0;
+ };
+ yf = function(y) {
+ return y <= midY ? 'top' : 'bottom';
+ };
+
+ if (lf(this._model.x)) {
+ this._model.xAlign = 'left';
+
+ // Is tooltip too wide and goes over the right side of the chart.?
+ if (olf(this._model.x)) {
+ this._model.xAlign = 'center';
+ this._model.yAlign = yf(this._model.y);
+ }
+ } else if (rf(this._model.x)) {
+ this._model.xAlign = 'right';
+
+ // Is tooltip too wide and goes outside left edge of canvas?
+ if (orf(this._model.x)) {
+ this._model.xAlign = 'center';
+ this._model.yAlign = yf(this._model.y);
+ }
+ }
+ },
+ getBackgroundPoint: function getBackgroundPoint(vm, size) {
+ // Background Position
+ var pt = {
+ x: vm.x,
+ y: vm.y
+ };
+
+ if (vm.xAlign === 'right') {
+ pt.x -= size.width;
+ } else if (vm.xAlign === 'center') {
+ pt.x -= (size.width / 2);
+ }
+
+ if (vm.yAlign === 'top') {
+ pt.y += vm.caretPadding + vm.caretSize;
+ } else if (vm.yAlign === 'bottom') {
+ pt.y -= size.height + vm.caretPadding + vm.caretSize;
+ } else {
+ pt.y -= (size.height / 2);
+ }
+
+ if (vm.yAlign === 'center') {
+ if (vm.xAlign === 'left') {
+ pt.x += vm.caretPadding + vm.caretSize;
+ } else if (vm.xAlign === 'right') {
+ pt.x -= vm.caretPadding + vm.caretSize;
+ }
+ } else {
+ if (vm.xAlign === 'left') {
+ pt.x -= vm.cornerRadius + vm.caretPadding;
+ } else if (vm.xAlign === 'right') {
+ pt.x += vm.cornerRadius + vm.caretPadding;
+ }
+ }
+
+ return pt;
+ },
+ drawCaret: function drawCaret(tooltipPoint, size, opacity, caretPadding) {
+ var vm = this._view;
+ var ctx = this._chart.ctx;
+ var x1, x2, x3;
+ var y1, y2, y3;
+
+ if (vm.yAlign === 'center') {
+ // Left or right side
+ if (vm.xAlign === 'left') {
+ x1 = tooltipPoint.x;
+ x2 = x1 - vm.caretSize;
+ x3 = x1;
+ } else {
+ x1 = tooltipPoint.x + size.width;
+ x2 = x1 + vm.caretSize;
+ x3 = x1;
+ }
+
+ y2 = tooltipPoint.y + (size.height / 2);
+ y1 = y2 - vm.caretSize;
+ y3 = y2 + vm.caretSize;
+ } else {
+ if (vm.xAlign === 'left') {
+ x1 = tooltipPoint.x + vm.cornerRadius;
+ x2 = x1 + vm.caretSize;
+ x3 = x2 + vm.caretSize;
+ } else if (vm.xAlign === 'right') {
+ x1 = tooltipPoint.x + size.width - vm.cornerRadius;
+ x2 = x1 - vm.caretSize;
+ x3 = x2 - vm.caretSize;
+ } else {
+ x2 = tooltipPoint.x + (size.width / 2);
+ x1 = x2 - vm.caretSize;
+ x3 = x2 + vm.caretSize;
+ }
+
+ if (vm.yAlign === 'top') {
+ y1 = tooltipPoint.y;
+ y2 = y1 - vm.caretSize;
+ y3 = y1;
+ } else {
+ y1 = tooltipPoint.y + size.height;
+ y2 = y1 + vm.caretSize;
+ y3 = y1;
+ }
+ }
+
+ ctx.fillStyle = helpers.color(vm.backgroundColor).alpha(opacity).rgbString();
+ ctx.beginPath();
+ ctx.moveTo(x1, y1);
+ ctx.lineTo(x2, y2);
+ ctx.lineTo(x3, y3);
+ ctx.closePath();
+ ctx.fill();
+ },
+ drawTitle: function drawTitle(pt, vm, ctx, opacity) {
+ if (vm.title.length) {
+ ctx.textAlign = vm._titleAlign;
+ ctx.textBaseline = "top";
+ ctx.fillStyle = helpers.color(vm.titleColor).alpha(opacity).rgbString();
+ ctx.font = helpers.fontString(vm.titleFontSize, vm._titleFontStyle, vm._titleFontFamily);
+
+ helpers.each(vm.title, function(title, i) {
+ ctx.fillText(title, pt.x, pt.y);
+ pt.y += vm.titleFontSize + vm.titleSpacing; // Line Height and spacing
+
+ if (i + 1 === vm.title.length) {
+ pt.y += vm.titleMarginBottom - vm.titleSpacing; // If Last, add margin, remove spacing
+ }
+ });
+ }
+ },
+ drawBody: function drawBody(pt, vm, ctx, opacity) {
+ ctx.textAlign = vm._bodyAlign;
+ ctx.textBaseline = "top";
+ ctx.fillStyle = helpers.color(vm.bodyColor).alpha(opacity).rgbString();
+ ctx.font = helpers.fontString(vm.bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);
+
+ // Before Body
+ helpers.each(vm.beforeBody, function(beforeBody) {
+ ctx.fillText(beforeBody, pt.x, pt.y);
+ pt.y += vm.bodyFontSize + vm.bodySpacing;
+ });
+
+ helpers.each(vm.body, function(body, i) {
+ // Draw Legend-like boxes if needed
+ if (this._options.tooltips.mode !== 'single') {
+ // Fill a white rect so that colours merge nicely if the opacity is < 1
+ ctx.fillStyle = helpers.color(vm.legendColorBackground).alpha(opacity).rgbaString();
+ ctx.fillRect(pt.x, pt.y, vm.bodyFontSize, vm.bodyFontSize);
+
+ // Border
+ ctx.strokeStyle = helpers.color(vm.labelColors[i].borderColor).alpha(opacity).rgbaString();
+ ctx.strokeRect(pt.x, pt.y, vm.bodyFontSize, vm.bodyFontSize);
+
+ // Inner square
+ ctx.fillStyle = helpers.color(vm.labelColors[i].backgroundColor).alpha(opacity).rgbaString();
+ ctx.fillRect(pt.x + 1, pt.y + 1, vm.bodyFontSize - 2, vm.bodyFontSize - 2);
+
+ ctx.fillStyle = helpers.color(vm.bodyColor).alpha(opacity).rgbaString(); // Return fill style for text
+ }
+
+ // Body Line
+ ctx.fillText(body, pt.x + (this._options.tooltips.mode !== 'single' ? (vm.bodyFontSize + 2) : 0), pt.y);
+
+ pt.y += vm.bodyFontSize + vm.bodySpacing;
+ }, this);
+
+ // After Body
+ helpers.each(vm.afterBody, function(afterBody) {
+ ctx.fillText(afterBody, pt.x, pt.y);
+ pt.y += vm.bodyFontSize;
+ });
+
+ pt.y -= vm.bodySpacing; // Remove last body spacing
+ },
+ drawFooter: function drawFooter(pt, vm, ctx, opacity) {
+ if (vm.footer.length) {
+ pt.y += vm.footerMarginTop;
+
+ ctx.textAlign = vm._footerAlign;
+ ctx.textBaseline = "top";
+ ctx.fillStyle = helpers.color(vm.footerColor).alpha(opacity).rgbString();
+ ctx.font = helpers.fontString(vm.footerFontSize, vm._footerFontStyle, vm._footerFontFamily);
+
+ helpers.each(vm.footer, function(footer) {
+ ctx.fillText(footer, pt.x, pt.y);
+ pt.y += vm.footerFontSize + vm.footerSpacing;
+ });
+ }
+ },
+ draw: function draw() {
+ var ctx = this._chart.ctx;
+ var vm = this._view;
+
+ if (vm.opacity === 0) {
+ return;
+ }
+
+ var caretPadding = vm.caretPadding;
+ var tooltipSize = this.getTooltipSize(vm);
+ var pt = {
+ x: vm.x,
+ y: vm.y
+ };
+
+ // IE11/Edge does not like very small opacities, so snap to 0
+ var opacity = Math.abs(vm.opacity < 1e-3) ? 0 : vm.opacity;
+
+ if (this._options.tooltips.enabled) {
+ // Draw Background
+ ctx.fillStyle = helpers.color(vm.backgroundColor).alpha(opacity).rgbString();
+ helpers.drawRoundedRectangle(ctx, pt.x, pt.y, tooltipSize.width, tooltipSize.height, vm.cornerRadius);
+ ctx.fill();
+
+ // Draw Caret
+ this.drawCaret(pt, tooltipSize, opacity, caretPadding);
+
+ // Draw Title, Body, and Footer
+ pt.x += vm.xPadding;
+ pt.y += vm.yPadding;
+
+ // Titles
+ this.drawTitle(pt, vm, ctx, opacity);
+
+ // Body
+ this.drawBody(pt, vm, ctx, opacity);
+
+ // Footer
+ this.drawFooter(pt, vm, ctx, opacity);
+ }
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.elements.line = {
- tension: 0.4,
- backgroundColor: Chart.defaults.global.defaultColor,
- borderWidth: 3,
- borderColor: Chart.defaults.global.defaultColor,
- borderCapStyle: 'butt',
- borderDash: [],
- borderDashOffset: 0.0,
- borderJoinStyle: 'miter',
- fill: true, // do we fill in the area between the line and its base axis
- };
-
- Chart.elements.Line = Chart.Element.extend({
- lineToNextPoint: function(previousPoint, point, nextPoint, skipHandler, previousSkipHandler) {
- var ctx = this._chart.ctx;
-
- if (point._view.skip) {
- skipHandler.call(this, previousPoint, point, nextPoint);
- } else if (previousPoint._view.skip) {
- previousSkipHandler.call(this, previousPoint, point, nextPoint);
- } else if (point._view.tension === 0) {
- ctx.lineTo(point._view.x, point._view.y);
- } else {
- // Line between points
- ctx.bezierCurveTo(
- previousPoint._view.controlPointNextX,
- previousPoint._view.controlPointNextY,
- point._view.controlPointPreviousX,
- point._view.controlPointPreviousY,
- point._view.x,
- point._view.y
- );
- }
- },
-
- draw: function() {
- var _this = this;
-
- var vm = this._view;
- var ctx = this._chart.ctx;
- var first = this._children[0];
- var last = this._children[this._children.length - 1];
-
- function loopBackToStart(drawLineToCenter) {
- if (!first._view.skip && !last._view.skip) {
- // Draw a bezier line from last to first
- ctx.bezierCurveTo(
- last._view.controlPointNextX,
- last._view.controlPointNextY,
- first._view.controlPointPreviousX,
- first._view.controlPointPreviousY,
- first._view.x,
- first._view.y
- );
- } else if (drawLineToCenter) {
- // Go to center
- ctx.lineTo(_this._view.scaleZero.x, _this._view.scaleZero.y);
- }
- }
-
- ctx.save();
-
- // If we had points and want to fill this line, do so.
- if (this._children.length > 0 && vm.fill) {
- // Draw the background first (so the border is always on top)
- ctx.beginPath();
-
- helpers.each(this._children, function(point, index) {
- var previous = helpers.previousItem(this._children, index);
- var next = helpers.nextItem(this._children, index);
-
- // First point moves to it's starting position no matter what
- if (index === 0) {
- if (this._loop) {
- ctx.moveTo(vm.scaleZero.x, vm.scaleZero.y);
- } else {
- ctx.moveTo(point._view.x, vm.scaleZero);
- }
-
- if (point._view.skip) {
- if (!this._loop) {
- ctx.moveTo(next._view.x, this._view.scaleZero);
- }
- } else {
- ctx.lineTo(point._view.x, point._view.y);
- }
- } else {
- this.lineToNextPoint(previous, point, next, function(previousPoint, point, nextPoint) {
- if (this._loop) {
- // Go to center
- ctx.lineTo(this._view.scaleZero.x, this._view.scaleZero.y);
- } else {
- ctx.lineTo(previousPoint._view.x, this._view.scaleZero);
- ctx.moveTo(nextPoint._view.x, this._view.scaleZero);
- }
- }, function(previousPoint, point) {
- // If we skipped the last point, draw a line to ourselves so that the fill is nice
- ctx.lineTo(point._view.x, point._view.y);
- });
- }
- }, this);
-
- // For radial scales, loop back around to the first point
- if (this._loop) {
- loopBackToStart(true);
- } else {
- //Round off the line by going to the base of the chart, back to the start, then fill.
- ctx.lineTo(this._children[this._children.length - 1]._view.x, vm.scaleZero);
- ctx.lineTo(this._children[0]._view.x, vm.scaleZero);
- }
-
- ctx.fillStyle = vm.backgroundColor || Chart.defaults.global.defaultColor;
- ctx.closePath();
- ctx.fill();
- }
-
- // Now draw the line between all the points with any borders
- ctx.lineCap = vm.borderCapStyle || Chart.defaults.global.elements.line.borderCapStyle;
-
- // IE 9 and 10 do not support line dash
- if (ctx.setLineDash) {
- ctx.setLineDash(vm.borderDash || Chart.defaults.global.elements.line.borderDash);
- }
-
- ctx.lineDashOffset = vm.borderDashOffset || Chart.defaults.global.elements.line.borderDashOffset;
- ctx.lineJoin = vm.borderJoinStyle || Chart.defaults.global.elements.line.borderJoinStyle;
- ctx.lineWidth = vm.borderWidth || Chart.defaults.global.elements.line.borderWidth;
- ctx.strokeStyle = vm.borderColor || Chart.defaults.global.defaultColor;
- ctx.beginPath();
-
- helpers.each(this._children, function(point, index) {
- var previous = helpers.previousItem(this._children, index);
- var next = helpers.nextItem(this._children, index);
-
- if (index === 0) {
- ctx.moveTo(point._view.x, point._view.y);
- } else {
- this.lineToNextPoint(previous, point, next, function(previousPoint, point, nextPoint) {
- ctx.moveTo(nextPoint._view.x, nextPoint._view.y);
- }, function(previousPoint, point) {
- // If we skipped the last point, move up to our point preventing a line from being drawn
- ctx.moveTo(point._view.x, point._view.y);
- });
- }
- }, this);
-
- if (this._loop && this._children.length > 0) {
- loopBackToStart();
- }
-
- ctx.stroke();
- ctx.restore();
- },
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.elements.line = {
+ tension: 0.4,
+ backgroundColor: Chart.defaults.global.defaultColor,
+ borderWidth: 3,
+ borderColor: Chart.defaults.global.defaultColor,
+ borderCapStyle: 'butt',
+ borderDash: [],
+ borderDashOffset: 0.0,
+ borderJoinStyle: 'miter',
+ fill: true // do we fill in the area between the line and its base axis
+ };
+
+ Chart.elements.Line = Chart.Element.extend({
+ lineToNextPoint: function(previousPoint, point, nextPoint, skipHandler, previousSkipHandler) {
+ var ctx = this._chart.ctx;
+
+ if (point._view.skip) {
+ skipHandler.call(this, previousPoint, point, nextPoint);
+ } else if (previousPoint._view.skip) {
+ previousSkipHandler.call(this, previousPoint, point, nextPoint);
+ } else if (point._view.tension === 0) {
+ ctx.lineTo(point._view.x, point._view.y);
+ } else {
+ // Line between points
+ ctx.bezierCurveTo(
+ previousPoint._view.controlPointNextX,
+ previousPoint._view.controlPointNextY,
+ point._view.controlPointPreviousX,
+ point._view.controlPointPreviousY,
+ point._view.x,
+ point._view.y
+ );
+ }
+ },
+
+ draw: function() {
+ var _this = this;
+
+ var vm = this._view;
+ var ctx = this._chart.ctx;
+ var first = this._children[0];
+ var last = this._children[this._children.length - 1];
+
+ function loopBackToStart(drawLineToCenter) {
+ if (!first._view.skip && !last._view.skip) {
+ // Draw a bezier line from last to first
+ ctx.bezierCurveTo(
+ last._view.controlPointNextX,
+ last._view.controlPointNextY,
+ first._view.controlPointPreviousX,
+ first._view.controlPointPreviousY,
+ first._view.x,
+ first._view.y
+ );
+ } else if (drawLineToCenter) {
+ // Go to center
+ ctx.lineTo(_this._view.scaleZero.x, _this._view.scaleZero.y);
+ }
+ }
+
+ ctx.save();
+
+ // If we had points and want to fill this line, do so.
+ if (this._children.length > 0 && vm.fill) {
+ // Draw the background first (so the border is always on top)
+ ctx.beginPath();
+
+ helpers.each(this._children, function(point, index) {
+ var previous = helpers.previousItem(this._children, index);
+ var next = helpers.nextItem(this._children, index);
+
+ // First point moves to it's starting position no matter what
+ if (index === 0) {
+ if (this._loop) {
+ ctx.moveTo(vm.scaleZero.x, vm.scaleZero.y);
+ } else {
+ ctx.moveTo(point._view.x, vm.scaleZero);
+ }
+
+ if (point._view.skip) {
+ if (!this._loop) {
+ ctx.moveTo(next._view.x, this._view.scaleZero);
+ }
+ } else {
+ ctx.lineTo(point._view.x, point._view.y);
+ }
+ } else {
+ this.lineToNextPoint(previous, point, next, function(previousPoint, point, nextPoint) {
+ if (this._loop) {
+ // Go to center
+ ctx.lineTo(this._view.scaleZero.x, this._view.scaleZero.y);
+ } else {
+ ctx.lineTo(previousPoint._view.x, this._view.scaleZero);
+ ctx.moveTo(nextPoint._view.x, this._view.scaleZero);
+ }
+ }, function(previousPoint, point) {
+ // If we skipped the last point, draw a line to ourselves so that the fill is nice
+ ctx.lineTo(point._view.x, point._view.y);
+ });
+ }
+ }, this);
+
+ // For radial scales, loop back around to the first point
+ if (this._loop) {
+ loopBackToStart(true);
+ } else {
+ //Round off the line by going to the base of the chart, back to the start, then fill.
+ ctx.lineTo(this._children[this._children.length - 1]._view.x, vm.scaleZero);
+ ctx.lineTo(this._children[0]._view.x, vm.scaleZero);
+ }
+
+ ctx.fillStyle = vm.backgroundColor || Chart.defaults.global.defaultColor;
+ ctx.closePath();
+ ctx.fill();
+ }
+
+ // Now draw the line between all the points with any borders
+ ctx.lineCap = vm.borderCapStyle || Chart.defaults.global.elements.line.borderCapStyle;
+
+ // IE 9 and 10 do not support line dash
+ if (ctx.setLineDash) {
+ ctx.setLineDash(vm.borderDash || Chart.defaults.global.elements.line.borderDash);
+ }
+
+ ctx.lineDashOffset = vm.borderDashOffset || Chart.defaults.global.elements.line.borderDashOffset;
+ ctx.lineJoin = vm.borderJoinStyle || Chart.defaults.global.elements.line.borderJoinStyle;
+ ctx.lineWidth = vm.borderWidth || Chart.defaults.global.elements.line.borderWidth;
+ ctx.strokeStyle = vm.borderColor || Chart.defaults.global.defaultColor;
+ ctx.beginPath();
+
+ helpers.each(this._children, function(point, index) {
+ var previous = helpers.previousItem(this._children, index);
+ var next = helpers.nextItem(this._children, index);
+
+ if (index === 0) {
+ ctx.moveTo(point._view.x, point._view.y);
+ } else {
+ this.lineToNextPoint(previous, point, next, function(previousPoint, point, nextPoint) {
+ ctx.moveTo(nextPoint._view.x, nextPoint._view.y);
+ }, function(previousPoint, point) {
+ // If we skipped the last point, move up to our point preventing a line from being drawn
+ ctx.moveTo(point._view.x, point._view.y);
+ });
+ }
+ }, this);
+
+ if (this._loop && this._children.length > 0) {
+ loopBackToStart();
+ }
+
+ ctx.stroke();
+ ctx.restore();
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- Chart.defaults.global.elements.point = {
- radius: 3,
- pointStyle: 'circle',
- backgroundColor: Chart.defaults.global.defaultColor,
- borderWidth: 1,
- borderColor: Chart.defaults.global.defaultColor,
- // Hover
- hitRadius: 1,
- hoverRadius: 4,
- hoverBorderWidth: 1,
- };
-
-
- Chart.elements.Point = Chart.Element.extend({
- inRange: function(mouseX, mouseY) {
- var vm = this._view;
-
- if (vm) {
- var hoverRange = vm.hitRadius + vm.radius;
- return ((Math.pow(mouseX - vm.x, 2) + Math.pow(mouseY - vm.y, 2)) < Math.pow(hoverRange, 2));
- } else {
- return false;
- }
- },
- inLabelRange: function(mouseX) {
- var vm = this._view;
-
- if (vm) {
- return (Math.pow(mouseX - vm.x, 2) < Math.pow(vm.radius + vm.hitRadius, 2));
- } else {
- return false;
- }
- },
- tooltipPosition: function() {
- var vm = this._view;
- return {
- x: vm.x,
- y: vm.y,
- padding: vm.radius + vm.borderWidth
- };
- },
- draw: function() {
-
- var vm = this._view;
- var ctx = this._chart.ctx;
-
-
- if (vm.skip) {
- return;
- }
-
- if (vm.radius > 0 || vm.borderWidth > 0) {
-
- ctx.strokeStyle = vm.borderColor || Chart.defaults.global.defaultColor;
- ctx.lineWidth = vm.borderWidth || Chart.defaults.global.elements.point.borderWidth;
-
- ctx.fillStyle = vm.backgroundColor || Chart.defaults.global.defaultColor;
-
- var radius = vm.radius || Chart.defaults.global.elements.point.radius;
-
- var xOffset;
- var yOffset;
-
- switch (vm.pointStyle) {
- // Default includes circle
- default:
- ctx.beginPath();
- ctx.arc(vm.x, vm.y, radius, 0, Math.PI * 2);
- ctx.closePath();
- ctx.fill();
- break;
- case 'triangle':
- ctx.beginPath();
- var edgeLength = 3 * radius / Math.sqrt(3);
- var height = edgeLength * Math.sqrt(3) / 2;
- ctx.moveTo(vm.x - edgeLength / 2, vm.y + height / 3);
- ctx.lineTo(vm.x + edgeLength / 2, vm.y + height / 3);
- ctx.lineTo(vm.x, vm.y - 2 * height / 3);
- ctx.closePath();
- ctx.fill();
- break;
- case 'rect':
- ctx.fillRect(vm.x - 1 / Math.SQRT2 * radius, vm.y - 1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
- ctx.strokeRect(vm.x - 1 / Math.SQRT2 * radius, vm.y - 1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
- break;
- case 'rectRot':
- ctx.translate(vm.x, vm.y);
- ctx.rotate(Math.PI / 4);
- ctx.fillRect(-1 / Math.SQRT2 * radius, -1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
- ctx.strokeRect(-1 / Math.SQRT2 * radius, -1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
- ctx.setTransform(1, 0, 0, 1, 0, 0);
- break;
- case 'cross':
- ctx.beginPath();
- ctx.moveTo(vm.x, vm.y + radius);
- ctx.lineTo(vm.x, vm.y - radius);
- ctx.moveTo(vm.x - radius, vm.y);
- ctx.lineTo(vm.x + radius, vm.y);
- ctx.closePath();
- break;
- case 'crossRot':
- ctx.beginPath();
- xOffset = Math.cos(Math.PI / 4) * radius;
- yOffset = Math.sin(Math.PI / 4) * radius;
- ctx.moveTo(vm.x - xOffset, vm.y - yOffset);
- ctx.lineTo(vm.x + xOffset, vm.y + yOffset);
- ctx.moveTo(vm.x - xOffset, vm.y + yOffset);
- ctx.lineTo(vm.x + xOffset, vm.y - yOffset);
- ctx.closePath();
- break;
- case 'star':
- ctx.beginPath();
- ctx.moveTo(vm.x, vm.y + radius);
- ctx.lineTo(vm.x, vm.y - radius);
- ctx.moveTo(vm.x - radius, vm.y);
- ctx.lineTo(vm.x + radius, vm.y);
- xOffset = Math.cos(Math.PI / 4) * radius;
- yOffset = Math.sin(Math.PI / 4) * radius;
- ctx.moveTo(vm.x - xOffset, vm.y - yOffset);
- ctx.lineTo(vm.x + xOffset, vm.y + yOffset);
- ctx.moveTo(vm.x - xOffset, vm.y + yOffset);
- ctx.lineTo(vm.x + xOffset, vm.y - yOffset);
- ctx.closePath();
- break;
- case 'line':
- ctx.beginPath();
- ctx.moveTo(vm.x - radius, vm.y);
- ctx.lineTo(vm.x + radius, vm.y);
- ctx.closePath();
- break;
- case 'dash':
- ctx.beginPath();
- ctx.moveTo(vm.x, vm.y);
- ctx.lineTo(vm.x + radius, vm.y);
- ctx.closePath();
- break;
- }
-
- ctx.stroke();
- }
- }
- });
-};
+ var helpers = Chart.helpers;
+
+ Chart.defaults.global.elements.point = {
+ radius: 3,
+ pointStyle: 'circle',
+ backgroundColor: Chart.defaults.global.defaultColor,
+ borderWidth: 1,
+ borderColor: Chart.defaults.global.defaultColor,
+ // Hover
+ hitRadius: 1,
+ hoverRadius: 4,
+ hoverBorderWidth: 1
+ };
+
+
+ Chart.elements.Point = Chart.Element.extend({
+ inRange: function(mouseX, mouseY) {
+ var vm = this._view;
+
+ if (vm) {
+ var hoverRange = vm.hitRadius + vm.radius;
+ return ((Math.pow(mouseX - vm.x, 2) + Math.pow(mouseY - vm.y, 2)) < Math.pow(hoverRange, 2));
+ } else {
+ return false;
+ }
+ },
+ inLabelRange: function(mouseX) {
+ var vm = this._view;
+
+ if (vm) {
+ return (Math.pow(mouseX - vm.x, 2) < Math.pow(vm.radius + vm.hitRadius, 2));
+ } else {
+ return false;
+ }
+ },
+ tooltipPosition: function() {
+ var vm = this._view;
+ return {
+ x: vm.x,
+ y: vm.y,
+ padding: vm.radius + vm.borderWidth
+ };
+ },
+ draw: function() {
+
+ var vm = this._view;
+ var ctx = this._chart.ctx;
+
+
+ if (vm.skip) {
+ return;
+ }
+
+ if (vm.radius > 0 || vm.borderWidth > 0) {
+
+ ctx.strokeStyle = vm.borderColor || Chart.defaults.global.defaultColor;
+ ctx.lineWidth = vm.borderWidth || Chart.defaults.global.elements.point.borderWidth;
+
+ ctx.fillStyle = vm.backgroundColor || Chart.defaults.global.defaultColor;
+
+ var radius = vm.radius || Chart.defaults.global.elements.point.radius;
+
+ var xOffset;
+ var yOffset;
+
+ switch (vm.pointStyle) {
+ // Default includes circle
+ default: ctx.beginPath();
+ ctx.arc(vm.x, vm.y, radius, 0, Math.PI * 2);
+ ctx.closePath();
+ ctx.fill();
+ break;
+ case 'triangle':
+ ctx.beginPath();
+ var edgeLength = 3 * radius / Math.sqrt(3);
+ var height = edgeLength * Math.sqrt(3) / 2;
+ ctx.moveTo(vm.x - edgeLength / 2, vm.y + height / 3);
+ ctx.lineTo(vm.x + edgeLength / 2, vm.y + height / 3);
+ ctx.lineTo(vm.x, vm.y - 2 * height / 3);
+ ctx.closePath();
+ ctx.fill();
+ break;
+ case 'rect':
+ ctx.fillRect(vm.x - 1 / Math.SQRT2 * radius, vm.y - 1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
+ ctx.strokeRect(vm.x - 1 / Math.SQRT2 * radius, vm.y - 1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
+ break;
+ case 'rectRot':
+ ctx.translate(vm.x, vm.y);
+ ctx.rotate(Math.PI / 4);
+ ctx.fillRect(-1 / Math.SQRT2 * radius, -1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
+ ctx.strokeRect(-1 / Math.SQRT2 * radius, -1 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius, 2 / Math.SQRT2 * radius);
+ ctx.setTransform(1, 0, 0, 1, 0, 0);
+ break;
+ case 'cross':
+ ctx.beginPath();
+ ctx.moveTo(vm.x, vm.y + radius);
+ ctx.lineTo(vm.x, vm.y - radius);
+ ctx.moveTo(vm.x - radius, vm.y);
+ ctx.lineTo(vm.x + radius, vm.y);
+ ctx.closePath();
+ break;
+ case 'crossRot':
+ ctx.beginPath();
+ xOffset = Math.cos(Math.PI / 4) * radius;
+ yOffset = Math.sin(Math.PI / 4) * radius;
+ ctx.moveTo(vm.x - xOffset, vm.y - yOffset);
+ ctx.lineTo(vm.x + xOffset, vm.y + yOffset);
+ ctx.moveTo(vm.x - xOffset, vm.y + yOffset);
+ ctx.lineTo(vm.x + xOffset, vm.y - yOffset);
+ ctx.closePath();
+ break;
+ case 'star':
+ ctx.beginPath();
+ ctx.moveTo(vm.x, vm.y + radius);
+ ctx.lineTo(vm.x, vm.y - radius);
+ ctx.moveTo(vm.x - radius, vm.y);
+ ctx.lineTo(vm.x + radius, vm.y);
+ xOffset = Math.cos(Math.PI / 4) * radius;
+ yOffset = Math.sin(Math.PI / 4) * radius;
+ ctx.moveTo(vm.x - xOffset, vm.y - yOffset);
+ ctx.lineTo(vm.x + xOffset, vm.y + yOffset);
+ ctx.moveTo(vm.x - xOffset, vm.y + yOffset);
+ ctx.lineTo(vm.x + xOffset, vm.y - yOffset);
+ ctx.closePath();
+ break;
+ case 'line':
+ ctx.beginPath();
+ ctx.moveTo(vm.x - radius, vm.y);
+ ctx.lineTo(vm.x + radius, vm.y);
+ ctx.closePath();
+ break;
+ case 'dash':
+ ctx.beginPath();
+ ctx.moveTo(vm.x, vm.y);
+ ctx.lineTo(vm.x + radius, vm.y);
+ ctx.closePath();
+ break;
+ }
+
+ ctx.stroke();
+ }
+ }
+ });
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
+ var helpers = Chart.helpers;
- Chart.defaults.global.elements.rectangle = {
- backgroundColor: Chart.defaults.global.defaultColor,
- borderWidth: 0,
- borderColor: Chart.defaults.global.defaultColor,
- };
+ Chart.defaults.global.elements.rectangle = {
+ backgroundColor: Chart.defaults.global.defaultColor,
+ borderWidth: 0,
+ borderColor: Chart.defaults.global.defaultColor
+ };
- Chart.elements.Rectangle = Chart.Element.extend({
- draw: function() {
+ Chart.elements.Rectangle = Chart.Element.extend({
+ draw: function() {
- var ctx = this._chart.ctx;
- var vm = this._view;
+ var ctx = this._chart.ctx;
+ var vm = this._view;
- var halfWidth = vm.width / 2,
- leftX = vm.x - halfWidth,
- rightX = vm.x + halfWidth,
- top = vm.base - (vm.base - vm.y),
- halfStroke = vm.borderWidth / 2;
+ var halfWidth = vm.width / 2,
+ leftX = vm.x - halfWidth,
+ rightX = vm.x + halfWidth,
+ top = vm.base - (vm.base - vm.y),
+ halfStroke = vm.borderWidth / 2;
- // Canvas doesn't allow us to stroke inside the width so we can
- // adjust the sizes to fit if we're setting a stroke on the line
- if (vm.borderWidth) {
- leftX += halfStroke;
- rightX -= halfStroke;
- top += halfStroke;
- }
+ // Canvas doesn't allow us to stroke inside the width so we can
+ // adjust the sizes to fit if we're setting a stroke on the line
+ if (vm.borderWidth) {
+ leftX += halfStroke;
+ rightX -= halfStroke;
+ top += halfStroke;
+ }
- ctx.beginPath();
+ ctx.beginPath();
- ctx.fillStyle = vm.backgroundColor;
- ctx.strokeStyle = vm.borderColor;
- ctx.lineWidth = vm.borderWidth;
+ ctx.fillStyle = vm.backgroundColor;
+ ctx.strokeStyle = vm.borderColor;
+ ctx.lineWidth = vm.borderWidth;
- // It'd be nice to keep this class totally generic to any rectangle
- // and simply specify which border to miss out.
- ctx.moveTo(leftX, vm.base);
- ctx.lineTo(leftX, top);
- ctx.lineTo(rightX, top);
- ctx.lineTo(rightX, vm.base);
- ctx.fill();
- if (vm.borderWidth) {
- ctx.stroke();
- }
- },
- height: function() {
- var vm = this._view;
- return vm.base - vm.y;
- },
- inRange: function(mouseX, mouseY) {
- var vm = this._view;
- var inRange = false;
+ // It'd be nice to keep this class totally generic to any rectangle
+ // and simply specify which border to miss out.
+ ctx.moveTo(leftX, vm.base);
+ ctx.lineTo(leftX, top);
+ ctx.lineTo(rightX, top);
+ ctx.lineTo(rightX, vm.base);
+ ctx.fill();
+ if (vm.borderWidth) {
+ ctx.stroke();
+ }
+ },
+ height: function() {
+ var vm = this._view;
+ return vm.base - vm.y;
+ },
+ inRange: function(mouseX, mouseY) {
+ var vm = this._view;
+ var inRange = false;
- if (vm) {
- if (vm.y < vm.base) {
- inRange = (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2) && (mouseY >= vm.y && mouseY <= vm.base);
- } else {
- inRange = (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2) && (mouseY >= vm.base && mouseY <= vm.y);
- }
- }
+ if (vm) {
+ if (vm.y < vm.base) {
+ inRange = (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2) && (mouseY >= vm.y && mouseY <= vm.base);
+ } else {
+ inRange = (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2) && (mouseY >= vm.base && mouseY <= vm.y);
+ }
+ }
- return inRange;
- },
- inLabelRange: function(mouseX) {
- var vm = this._view;
+ return inRange;
+ },
+ inLabelRange: function(mouseX) {
+ var vm = this._view;
- if (vm) {
- return (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2);
- } else {
- return false;
- }
- },
- tooltipPosition: function() {
- var vm = this._view;
- return {
- x: vm.x,
- y: vm.y
- };
- },
- });
+ if (vm) {
+ return (mouseX >= vm.x - vm.width / 2 && mouseX <= vm.x + vm.width / 2);
+ } else {
+ return false;
+ }
+ },
+ tooltipPosition: function() {
+ var vm = this._view;
+ return {
+ x: vm.x,
+ y: vm.y
+ };
+ }
+ });
-};
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
- // Default config for a category scale
- var defaultConfig = {
- position: "bottom",
- };
-
- var DatasetScale = Chart.Scale.extend({
- buildTicks: function(index) {
- this.ticks = this.chart.data.labels;
- },
-
- getLabelForIndex: function(index, datasetIndex) {
- return this.ticks[index];
- },
-
- // Used to get data value locations. Value can either be an index or a numerical value
- getPixelForValue: function(value, index, datasetIndex, includeOffset) {
- if (this.isHorizontal()) {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- var valueWidth = innerWidth / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
- var widthOffset = (valueWidth * index) + this.paddingLeft;
-
- if (this.options.gridLines.offsetGridLines && includeOffset) {
- widthOffset += (valueWidth / 2);
- }
-
- return this.left + Math.round(widthOffset);
- } else {
- var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
- var valueHeight = innerHeight / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
- var heightOffset = (valueHeight * index) + this.paddingTop;
-
- if (this.options.gridLines.offsetGridLines && includeOffset) {
- heightOffset += (valueHeight / 2);
- }
-
- return this.top + Math.round(heightOffset);
- }
- },
- });
-
- Chart.scaleService.registerScaleType("category", DatasetScale, defaultConfig);
-
-};
+ var helpers = Chart.helpers;
+ // Default config for a category scale
+ var defaultConfig = {
+ position: "bottom"
+ };
+
+ var DatasetScale = Chart.Scale.extend({
+ buildTicks: function(index) {
+ this.ticks = this.chart.data.labels;
+ },
+
+ getLabelForIndex: function(index, datasetIndex) {
+ return this.ticks[index];
+ },
+
+ // Used to get data value locations. Value can either be an index or a numerical value
+ getPixelForValue: function(value, index, datasetIndex, includeOffset) {
+ if (this.isHorizontal()) {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ var valueWidth = innerWidth / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
+ var widthOffset = (valueWidth * index) + this.paddingLeft;
+
+ if (this.options.gridLines.offsetGridLines && includeOffset) {
+ widthOffset += (valueWidth / 2);
+ }
+
+ return this.left + Math.round(widthOffset);
+ } else {
+ var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
+ var valueHeight = innerHeight / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
+ var heightOffset = (valueHeight * index) + this.paddingTop;
+
+ if (this.options.gridLines.offsetGridLines && includeOffset) {
+ heightOffset += (valueHeight / 2);
+ }
+
+ return this.top + Math.round(heightOffset);
+ }
+ }
+ });
+
+ Chart.scaleService.registerScaleType("category", DatasetScale, defaultConfig);
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- var defaultConfig = {
- position: "left",
- ticks: {
- callback: function(tickValue, index, ticks) {
- var delta = ticks[1] - ticks[0];
-
- // If we have a number like 2.5 as the delta, figure out how many decimal places we need
- if (Math.abs(delta) > 1) {
- if (tickValue !== Math.floor(tickValue)) {
- // not an integer
- delta = tickValue - Math.floor(tickValue);
- }
- }
-
- var logDelta = helpers.log10(Math.abs(delta));
- var tickString = '';
-
- if (tickValue !== 0) {
- var numDecimal = -1 * Math.floor(logDelta);
- numDecimal = Math.max(Math.min(numDecimal, 20), 0); // toFixed has a max of 20 decimal places
- tickString = tickValue.toFixed(numDecimal);
- } else {
- tickString = '0'; // never show decimal places for 0
- }
-
- return tickString;
- }
- }
- };
-
- var LinearScale = Chart.Scale.extend({
- determineDataLimits: function() {
- // First Calculate the range
- this.min = null;
- this.max = null;
-
- if (this.options.stacked) {
- var valuesPerType = {};
- var hasPositiveValues = false;
- var hasNegativeValues = false;
-
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (valuesPerType[dataset.type] === undefined) {
- valuesPerType[dataset.type] = {
- positiveValues: [],
- negativeValues: [],
- };
- }
-
- // Store these per type
- var positiveValues = valuesPerType[dataset.type].positiveValues;
- var negativeValues = valuesPerType[dataset.type].negativeValues;
-
- if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
- helpers.each(dataset.data, function(rawValue, index) {
-
- var value = +this.getRightValue(rawValue);
- if (isNaN(value)) {
- return;
- }
-
- positiveValues[index] = positiveValues[index] || 0;
- negativeValues[index] = negativeValues[index] || 0;
-
- if (this.options.relativePoints) {
- positiveValues[index] = 100;
- } else {
- if (value < 0) {
- hasNegativeValues = true;
- negativeValues[index] += value;
- } else {
- hasPositiveValues = true;
- positiveValues[index] += value;
- }
- }
- }, this);
- }
- }, this);
-
- helpers.each(valuesPerType, function(valuesForType) {
- var values = valuesForType.positiveValues.concat(valuesForType.negativeValues);
- var minVal = helpers.min(values);
- var maxVal = helpers.max(values);
- this.min = this.min === null ? minVal : Math.min(this.min, minVal);
- this.max = this.max === null ? maxVal : Math.max(this.max, maxVal);
- }, this);
-
- } else {
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
- helpers.each(dataset.data, function(rawValue, index) {
- var value = +this.getRightValue(rawValue);
- if (isNaN(value)) {
- return;
- }
-
- if (this.min === null) {
- this.min = value;
- } else if (value < this.min) {
- this.min = value;
- }
-
- if (this.max === null) {
- this.max = value;
- } else if (value > this.max) {
- this.max = value;
- }
- }, this);
- }
- }, this);
- }
-
- // If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
- // do nothing since that would make the chart weird. If the user really wants a weird chart
- // axis, they can manually override it
- if (this.options.ticks.beginAtZero) {
- var minSign = helpers.sign(this.min);
- var maxSign = helpers.sign(this.max);
-
- if (minSign < 0 && maxSign < 0) {
- // move the top up to 0
- this.max = 0;
- } else if (minSign > 0 && maxSign > 0) {
- // move the botttom down to 0
- this.min = 0;
- }
- }
-
- if (this.options.ticks.min !== undefined) {
- this.min = this.options.ticks.min;
- } else if (this.options.ticks.suggestedMin !== undefined) {
- this.min = Math.min(this.min, this.options.ticks.suggestedMin);
- }
-
- if (this.options.ticks.max !== undefined) {
- this.max = this.options.ticks.max;
- } else if (this.options.ticks.suggestedMax !== undefined) {
- this.max = Math.max(this.max, this.options.ticks.suggestedMax);
- }
-
- if (this.min === this.max) {
- this.min--;
- this.max++;
- }
- },
- buildTicks: function() {
-
- // Then calulate the ticks
- this.ticks = [];
-
- // Figure out what the max number of ticks we can support it is based on the size of
- // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
- // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
- // the graph
-
- var maxTicks;
-
- if (this.isHorizontal()) {
- maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
- Math.ceil(this.width / 50));
- } else {
- // The factor of 2 used to scale the font size has been experimentally determined.
- maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
- Math.ceil(this.height / (2 * this.options.ticks.fontSize)));
- }
-
- // Make sure we always have at least 2 ticks
- maxTicks = Math.max(2, maxTicks);
-
- // To get a "nice" value for the tick spacing, we will use the appropriately named
- // "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
- // for details.
-
- var spacing;
- var fixedStepSizeSet = this.options.ticks.fixedStepSize && this.options.ticks.fixedStepSize > 0;
- if (fixedStepSizeSet) {
- spacing = this.options.ticks.fixedStepSize;
- } else {
- var niceRange = helpers.niceNum(this.max - this.min, false);
- spacing = helpers.niceNum(niceRange / (maxTicks - 1), true);
- }
- var niceMin = Math.floor(this.min / spacing) * spacing;
- var niceMax = Math.ceil(this.max / spacing) * spacing;
- var numSpaces = (niceMax - niceMin) / spacing;
-
- // If very close to our rounded value, use it.
- if (helpers.almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
- numSpaces = Math.round(numSpaces);
- } else {
- numSpaces = Math.ceil(numSpaces);
- }
-
- // Put the values into the ticks array
- this.ticks.push(this.options.ticks.min !== undefined ? this.options.ticks.min : niceMin);
- for (var j = 1; j < numSpaces; ++j) {
- this.ticks.push(niceMin + (j * spacing));
- }
- this.ticks.push(this.options.ticks.max !== undefined ? this.options.ticks.max : niceMax);
-
- if (this.options.position == "left" || this.options.position == "right") {
- // We are in a vertical orientation. The top value is the highest. So reverse the array
- this.ticks.reverse();
- }
-
- // At this point, we need to update our max and min given the tick values since we have expanded the
- // range of the scale
- this.max = helpers.max(this.ticks);
- this.min = helpers.min(this.ticks);
-
- if (this.options.ticks.reverse) {
- this.ticks.reverse();
-
- this.start = this.max;
- this.end = this.min;
- } else {
- this.start = this.min;
- this.end = this.max;
- }
-
- this.ticksAsNumbers = this.ticks.slice(); // do after we potentially reverse the ticks
- this.zeroLineIndex = this.ticks.indexOf(0);
- },
- getLabelForIndex: function(index, datasetIndex) {
- return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
- },
- // Utils
- getPixelForValue: function(value, index, datasetIndex, includeOffset) {
- // This must be called after fit has been run so that
- // this.left, this.top, this.right, and this.bottom have been defined
- var rightValue = +this.getRightValue(value);
- var pixel;
- var range = this.end - this.start;
-
- if (this.isHorizontal()) {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- pixel = this.left + (innerWidth / range * (rightValue - this.start));
- return Math.round(pixel + this.paddingLeft);
- } else {
- var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
- pixel = (this.bottom - this.paddingBottom) - (innerHeight / range * (rightValue - this.start));
- return Math.round(pixel);
- }
- },
- getPixelForTick: function(index, includeOffset) {
- return this.getPixelForValue(this.ticksAsNumbers[index], null, null, includeOffset);
- },
- });
- Chart.scaleService.registerScaleType("linear", LinearScale, defaultConfig);
-
-};
+ var helpers = Chart.helpers;
+
+ var defaultConfig = {
+ position: "left",
+ ticks: {
+ callback: function(tickValue, index, ticks) {
+ var delta = ticks[1] - ticks[0];
+
+ // If we have a number like 2.5 as the delta, figure out how many decimal places we need
+ if (Math.abs(delta) > 1) {
+ if (tickValue !== Math.floor(tickValue)) {
+ // not an integer
+ delta = tickValue - Math.floor(tickValue);
+ }
+ }
+
+ var logDelta = helpers.log10(Math.abs(delta));
+ var tickString = '';
+
+ if (tickValue !== 0) {
+ var numDecimal = -1 * Math.floor(logDelta);
+ numDecimal = Math.max(Math.min(numDecimal, 20), 0); // toFixed has a max of 20 decimal places
+ tickString = tickValue.toFixed(numDecimal);
+ } else {
+ tickString = '0'; // never show decimal places for 0
+ }
+
+ return tickString;
+ }
+ }
+ };
+
+ var LinearScale = Chart.Scale.extend({
+ determineDataLimits: function() {
+ // First Calculate the range
+ this.min = null;
+ this.max = null;
+
+ if (this.options.stacked) {
+ var valuesPerType = {};
+ var hasPositiveValues = false;
+ var hasNegativeValues = false;
+
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (valuesPerType[dataset.type] === undefined) {
+ valuesPerType[dataset.type] = {
+ positiveValues: [],
+ negativeValues: []
+ };
+ }
+
+ // Store these per type
+ var positiveValues = valuesPerType[dataset.type].positiveValues;
+ var negativeValues = valuesPerType[dataset.type].negativeValues;
+
+ if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
+ helpers.each(dataset.data, function(rawValue, index) {
+
+ var value = +this.getRightValue(rawValue);
+ if (isNaN(value)) {
+ return;
+ }
+
+ positiveValues[index] = positiveValues[index] || 0;
+ negativeValues[index] = negativeValues[index] || 0;
+
+ if (this.options.relativePoints) {
+ positiveValues[index] = 100;
+ } else {
+ if (value < 0) {
+ hasNegativeValues = true;
+ negativeValues[index] += value;
+ } else {
+ hasPositiveValues = true;
+ positiveValues[index] += value;
+ }
+ }
+ }, this);
+ }
+ }, this);
+
+ helpers.each(valuesPerType, function(valuesForType) {
+ var values = valuesForType.positiveValues.concat(valuesForType.negativeValues);
+ var minVal = helpers.min(values);
+ var maxVal = helpers.max(values);
+ this.min = this.min === null ? minVal : Math.min(this.min, minVal);
+ this.max = this.max === null ? maxVal : Math.max(this.max, maxVal);
+ }, this);
+
+ } else {
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
+ helpers.each(dataset.data, function(rawValue, index) {
+ var value = +this.getRightValue(rawValue);
+ if (isNaN(value)) {
+ return;
+ }
+
+ if (this.min === null) {
+ this.min = value;
+ } else if (value < this.min) {
+ this.min = value;
+ }
+
+ if (this.max === null) {
+ this.max = value;
+ } else if (value > this.max) {
+ this.max = value;
+ }
+ }, this);
+ }
+ }, this);
+ }
+
+ // If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
+ // do nothing since that would make the chart weird. If the user really wants a weird chart
+ // axis, they can manually override it
+ if (this.options.ticks.beginAtZero) {
+ var minSign = helpers.sign(this.min);
+ var maxSign = helpers.sign(this.max);
+
+ if (minSign < 0 && maxSign < 0) {
+ // move the top up to 0
+ this.max = 0;
+ } else if (minSign > 0 && maxSign > 0) {
+ // move the botttom down to 0
+ this.min = 0;
+ }
+ }
+
+ if (this.options.ticks.min !== undefined) {
+ this.min = this.options.ticks.min;
+ } else if (this.options.ticks.suggestedMin !== undefined) {
+ this.min = Math.min(this.min, this.options.ticks.suggestedMin);
+ }
+
+ if (this.options.ticks.max !== undefined) {
+ this.max = this.options.ticks.max;
+ } else if (this.options.ticks.suggestedMax !== undefined) {
+ this.max = Math.max(this.max, this.options.ticks.suggestedMax);
+ }
+
+ if (this.min === this.max) {
+ this.min--;
+ this.max++;
+ }
+ },
+ buildTicks: function() {
+
+ // Then calulate the ticks
+ this.ticks = [];
+
+ // Figure out what the max number of ticks we can support it is based on the size of
+ // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
+ // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
+ // the graph
+
+ var maxTicks;
+
+ if (this.isHorizontal()) {
+ maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
+ Math.ceil(this.width / 50));
+ } else {
+ // The factor of 2 used to scale the font size has been experimentally determined.
+ maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
+ Math.ceil(this.height / (2 * this.options.ticks.fontSize)));
+ }
+
+ // Make sure we always have at least 2 ticks
+ maxTicks = Math.max(2, maxTicks);
+
+ // To get a "nice" value for the tick spacing, we will use the appropriately named
+ // "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
+ // for details.
+
+ var spacing;
+ var fixedStepSizeSet = this.options.ticks.fixedStepSize && this.options.ticks.fixedStepSize > 0;
+ if (fixedStepSizeSet) {
+ spacing = this.options.ticks.fixedStepSize;
+ } else {
+ var niceRange = helpers.niceNum(this.max - this.min, false);
+ spacing = helpers.niceNum(niceRange / (maxTicks - 1), true);
+ }
+ var niceMin = Math.floor(this.min / spacing) * spacing;
+ var niceMax = Math.ceil(this.max / spacing) * spacing;
+ var numSpaces = (niceMax - niceMin) / spacing;
+
+ // If very close to our rounded value, use it.
+ if (helpers.almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
+ numSpaces = Math.round(numSpaces);
+ } else {
+ numSpaces = Math.ceil(numSpaces);
+ }
+
+ // Put the values into the ticks array
+ this.ticks.push(this.options.ticks.min !== undefined ? this.options.ticks.min : niceMin);
+ for (var j = 1; j < numSpaces; ++j) {
+ this.ticks.push(niceMin + (j * spacing));
+ }
+ this.ticks.push(this.options.ticks.max !== undefined ? this.options.ticks.max : niceMax);
+
+ if (this.options.position === "left" || this.options.position === "right") {
+ // We are in a vertical orientation. The top value is the highest. So reverse the array
+ this.ticks.reverse();
+ }
+
+ // At this point, we need to update our max and min given the tick values since we have expanded the
+ // range of the scale
+ this.max = helpers.max(this.ticks);
+ this.min = helpers.min(this.ticks);
+
+ if (this.options.ticks.reverse) {
+ this.ticks.reverse();
+
+ this.start = this.max;
+ this.end = this.min;
+ } else {
+ this.start = this.min;
+ this.end = this.max;
+ }
+
+ this.ticksAsNumbers = this.ticks.slice(); // do after we potentially reverse the ticks
+ this.zeroLineIndex = this.ticks.indexOf(0);
+ },
+ getLabelForIndex: function(index, datasetIndex) {
+ return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
+ },
+ // Utils
+ getPixelForValue: function(value, index, datasetIndex, includeOffset) {
+ // This must be called after fit has been run so that
+ // this.left, this.top, this.right, and this.bottom have been defined
+ var rightValue = +this.getRightValue(value);
+ var pixel;
+ var range = this.end - this.start;
+
+ if (this.isHorizontal()) {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ pixel = this.left + (innerWidth / range * (rightValue - this.start));
+ return Math.round(pixel + this.paddingLeft);
+ } else {
+ var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
+ pixel = (this.bottom - this.paddingBottom) - (innerHeight / range * (rightValue - this.start));
+ return Math.round(pixel);
+ }
+ },
+ getPixelForTick: function(index, includeOffset) {
+ return this.getPixelForValue(this.ticksAsNumbers[index], null, null, includeOffset);
+ }
+ });
+ Chart.scaleService.registerScaleType("linear", LinearScale, defaultConfig);
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- var defaultConfig = {
- position: "left",
-
- // label settings
- ticks: {
- callback: function(value, index, arr) {
- var remain = value / (Math.pow(10, Math.floor(Chart.helpers.log10(value))));
-
- if (remain === 1 || remain === 2 || remain === 5 || index === 0 || index === arr.length - 1) {
- return value.toExponential();
- } else {
- return '';
- }
- }
- }
- };
-
- var LogarithmicScale = Chart.Scale.extend({
- determineDataLimits: function() {
- // Calculate Range
- this.min = null;
- this.max = null;
-
- if (this.options.stacked) {
- var valuesPerType = {};
-
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
- if (valuesPerType[dataset.type] === undefined) {
- valuesPerType[dataset.type] = [];
- }
-
- helpers.each(dataset.data, function(rawValue, index) {
- var values = valuesPerType[dataset.type];
- var value = +this.getRightValue(rawValue);
- if (isNaN(value)) {
- return;
- }
-
- values[index] = values[index] || 0;
-
- if (this.options.relativePoints) {
- values[index] = 100;
- } else {
- // Don't need to split positive and negative since the log scale can't handle a 0 crossing
- values[index] += value;
- }
- }, this);
- }
- }, this);
-
- helpers.each(valuesPerType, function(valuesForType) {
- var minVal = helpers.min(valuesForType);
- var maxVal = helpers.max(valuesForType);
- this.min = this.min === null ? minVal : Math.min(this.min, minVal);
- this.max = this.max === null ? maxVal : Math.max(this.max, maxVal);
- }, this);
-
- } else {
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
- helpers.each(dataset.data, function(rawValue, index) {
- var value = +this.getRightValue(rawValue);
- if (isNaN(value)) {
- return;
- }
-
- if (this.min === null) {
- this.min = value;
- } else if (value < this.min) {
- this.min = value;
- }
-
- if (this.max === null) {
- this.max = value;
- } else if (value > this.max) {
- this.max = value;
- }
- }, this);
- }
- }, this);
- }
-
- this.min = this.options.ticks.min !== undefined ? this.options.ticks.min : this.min;
- this.max = this.options.ticks.max !== undefined ? this.options.ticks.max : this.max;
-
- if (this.min === this.max) {
- if (this.min !== 0 && this.min !== null) {
- this.min = Math.pow(10, Math.floor(helpers.log10(this.min)) - 1);
- this.max = Math.pow(10, Math.floor(helpers.log10(this.max)) + 1);
- } else {
- this.min = 1;
- this.max = 10;
- }
- }
- },
- buildTicks: function() {
- // Reset the ticks array. Later on, we will draw a grid line at these positions
- // The array simply contains the numerical value of the spots where ticks will be
- this.tickValues = [];
-
- // Figure out what the max number of ticks we can support it is based on the size of
- // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
- // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
- // the graph
-
- var tickVal = this.options.ticks.min !== undefined ? this.options.ticks.min : Math.pow(10, Math.floor(helpers.log10(this.min)));
-
- while (tickVal < this.max) {
- this.tickValues.push(tickVal);
-
- var exp = Math.floor(helpers.log10(tickVal));
- var significand = Math.floor(tickVal / Math.pow(10, exp)) + 1;
-
- if (significand === 10) {
- significand = 1;
- ++exp;
- }
-
- tickVal = significand * Math.pow(10, exp);
- }
-
- var lastTick = this.options.ticks.max !== undefined ? this.options.ticks.max : tickVal;
- this.tickValues.push(lastTick);
-
- if (this.options.position == "left" || this.options.position == "right") {
- // We are in a vertical orientation. The top value is the highest. So reverse the array
- this.tickValues.reverse();
- }
-
- // At this point, we need to update our max and min given the tick values since we have expanded the
- // range of the scale
- this.max = helpers.max(this.tickValues);
- this.min = helpers.min(this.tickValues);
-
- if (this.options.ticks.reverse) {
- this.tickValues.reverse();
-
- this.start = this.max;
- this.end = this.min;
- } else {
- this.start = this.min;
- this.end = this.max;
- }
-
- this.ticks = this.tickValues.slice();
- },
- // Get the correct tooltip label
- getLabelForIndex: function(index, datasetIndex) {
- return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
- },
- getPixelForTick: function(index, includeOffset) {
- return this.getPixelForValue(this.tickValues[index], null, null, includeOffset);
- },
- getPixelForValue: function(value, index, datasetIndex, includeOffset) {
- var pixel;
-
- var newVal = +this.getRightValue(value);
- var range = helpers.log10(this.end) - helpers.log10(this.start);
-
- if (this.isHorizontal()) {
-
- if (newVal === 0) {
- pixel = this.left + this.paddingLeft;
- } else {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- pixel = this.left + (innerWidth / range * (helpers.log10(newVal) - helpers.log10(this.start)));
- pixel += this.paddingLeft;
- }
- } else {
- // Bottom - top since pixels increase downard on a screen
- if (newVal === 0) {
- pixel = this.top + this.paddingTop;
- } else {
- var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
- pixel = (this.bottom - this.paddingBottom) - (innerHeight / range * (helpers.log10(newVal) - helpers.log10(this.start)));
- }
- }
-
- return pixel;
- },
-
- });
- Chart.scaleService.registerScaleType("logarithmic", LogarithmicScale, defaultConfig);
-
-};
+ var helpers = Chart.helpers;
+
+ var defaultConfig = {
+ position: "left",
+
+ // label settings
+ ticks: {
+ callback: function(value, index, arr) {
+ var remain = value / (Math.pow(10, Math.floor(Chart.helpers.log10(value))));
+
+ if (remain === 1 || remain === 2 || remain === 5 || index === 0 || index === arr.length - 1) {
+ return value.toExponential();
+ } else {
+ return '';
+ }
+ }
+ }
+ };
+
+ var LogarithmicScale = Chart.Scale.extend({
+ determineDataLimits: function() {
+ // Calculate Range
+ this.min = null;
+ this.max = null;
+
+ if (this.options.stacked) {
+ var valuesPerType = {};
+
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
+ if (valuesPerType[dataset.type] === undefined) {
+ valuesPerType[dataset.type] = [];
+ }
+
+ helpers.each(dataset.data, function(rawValue, index) {
+ var values = valuesPerType[dataset.type];
+ var value = +this.getRightValue(rawValue);
+ if (isNaN(value)) {
+ return;
+ }
+
+ values[index] = values[index] || 0;
+
+ if (this.options.relativePoints) {
+ values[index] = 100;
+ } else {
+ // Don't need to split positive and negative since the log scale can't handle a 0 crossing
+ values[index] += value;
+ }
+ }, this);
+ }
+ }, this);
+
+ helpers.each(valuesPerType, function(valuesForType) {
+ var minVal = helpers.min(valuesForType);
+ var maxVal = helpers.max(valuesForType);
+ this.min = this.min === null ? minVal : Math.min(this.min, minVal);
+ this.max = this.max === null ? maxVal : Math.max(this.max, maxVal);
+ }, this);
+
+ } else {
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (helpers.isDatasetVisible(dataset) && (this.isHorizontal() ? dataset.xAxisID === this.id : dataset.yAxisID === this.id)) {
+ helpers.each(dataset.data, function(rawValue, index) {
+ var value = +this.getRightValue(rawValue);
+ if (isNaN(value)) {
+ return;
+ }
+
+ if (this.min === null) {
+ this.min = value;
+ } else if (value < this.min) {
+ this.min = value;
+ }
+
+ if (this.max === null) {
+ this.max = value;
+ } else if (value > this.max) {
+ this.max = value;
+ }
+ }, this);
+ }
+ }, this);
+ }
+
+ this.min = this.options.ticks.min !== undefined ? this.options.ticks.min : this.min;
+ this.max = this.options.ticks.max !== undefined ? this.options.ticks.max : this.max;
+
+ if (this.min === this.max) {
+ if (this.min !== 0 && this.min !== null) {
+ this.min = Math.pow(10, Math.floor(helpers.log10(this.min)) - 1);
+ this.max = Math.pow(10, Math.floor(helpers.log10(this.max)) + 1);
+ } else {
+ this.min = 1;
+ this.max = 10;
+ }
+ }
+ },
+ buildTicks: function() {
+ // Reset the ticks array. Later on, we will draw a grid line at these positions
+ // The array simply contains the numerical value of the spots where ticks will be
+ this.tickValues = [];
+
+ // Figure out what the max number of ticks we can support it is based on the size of
+ // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
+ // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
+ // the graph
+
+ var tickVal = this.options.ticks.min !== undefined ? this.options.ticks.min : Math.pow(10, Math.floor(helpers.log10(this.min)));
+
+ while (tickVal < this.max) {
+ this.tickValues.push(tickVal);
+
+ var exp = Math.floor(helpers.log10(tickVal));
+ var significand = Math.floor(tickVal / Math.pow(10, exp)) + 1;
+
+ if (significand === 10) {
+ significand = 1;
+ ++exp;
+ }
+
+ tickVal = significand * Math.pow(10, exp);
+ }
+
+ var lastTick = this.options.ticks.max !== undefined ? this.options.ticks.max : tickVal;
+ this.tickValues.push(lastTick);
+
+ if (this.options.position === "left" || this.options.position === "right") {
+ // We are in a vertical orientation. The top value is the highest. So reverse the array
+ this.tickValues.reverse();
+ }
+
+ // At this point, we need to update our max and min given the tick values since we have expanded the
+ // range of the scale
+ this.max = helpers.max(this.tickValues);
+ this.min = helpers.min(this.tickValues);
+
+ if (this.options.ticks.reverse) {
+ this.tickValues.reverse();
+
+ this.start = this.max;
+ this.end = this.min;
+ } else {
+ this.start = this.min;
+ this.end = this.max;
+ }
+
+ this.ticks = this.tickValues.slice();
+ },
+ // Get the correct tooltip label
+ getLabelForIndex: function(index, datasetIndex) {
+ return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
+ },
+ getPixelForTick: function(index, includeOffset) {
+ return this.getPixelForValue(this.tickValues[index], null, null, includeOffset);
+ },
+ getPixelForValue: function(value, index, datasetIndex, includeOffset) {
+ var pixel;
+
+ var newVal = +this.getRightValue(value);
+ var range = helpers.log10(this.end) - helpers.log10(this.start);
+
+ if (this.isHorizontal()) {
+
+ if (newVal === 0) {
+ pixel = this.left + this.paddingLeft;
+ } else {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ pixel = this.left + (innerWidth / range * (helpers.log10(newVal) - helpers.log10(this.start)));
+ pixel += this.paddingLeft;
+ }
+ } else {
+ // Bottom - top since pixels increase downard on a screen
+ if (newVal === 0) {
+ pixel = this.top + this.paddingTop;
+ } else {
+ var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
+ pixel = (this.bottom - this.paddingBottom) - (innerHeight / range * (helpers.log10(newVal) - helpers.log10(this.start)));
+ }
+ }
+
+ return pixel;
+ }
+
+ });
+ Chart.scaleService.registerScaleType("logarithmic", LogarithmicScale, defaultConfig);
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- var defaultConfig = {
- display: true,
-
- //Boolean - Whether to animate scaling the chart from the centre
- animate: true,
- lineArc: false,
- position: "chartArea",
-
- angleLines: {
- display: true,
- color: "rgba(0, 0, 0, 0.1)",
- lineWidth: 1
- },
-
- // label settings
- ticks: {
- //Boolean - Show a backdrop to the scale label
- showLabelBackdrop: true,
-
- //String - The colour of the label backdrop
- backdropColor: "rgba(255,255,255,0.75)",
-
- //Number - The backdrop padding above & below the label in pixels
- backdropPaddingY: 2,
-
- //Number - The backdrop padding to the side of the label in pixels
- backdropPaddingX: 2,
- },
-
- pointLabels: {
- //String - Point label font declaration
- fontFamily: Chart.defaults.global.defaultFontFamily,
-
- //String - Point label font weight
- fontStyle: Chart.defaults.global.defaultFontStyle,
-
- //Number - Point label font size in pixels
- fontSize: 10,
-
- //String - Point label font colour
- fontColor: Chart.defaults.global.defaultFontColor,
-
- //Function - Used to convert point labels
- callback: function(label) {
- return label;
- }
- },
- };
-
- var LinearRadialScale = Chart.Scale.extend({
- getValueCount: function() {
- return this.chart.data.labels.length;
- },
- setDimensions: function() {
- // Set the unconstrained dimension before label rotation
- this.width = this.maxWidth;
- this.height = this.maxHeight;
- this.xCenter = Math.round(this.width / 2);
- this.yCenter = Math.round(this.height / 2);
-
- var minSize = helpers.min([this.height, this.width]);
- this.drawingArea = (this.options.display) ? (minSize / 2) - (this.options.ticks.fontSize / 2 + this.options.ticks.backdropPaddingY) : (minSize / 2);
- },
- determineDataLimits: function() {
- this.min = null;
- this.max = null;
-
- helpers.each(this.chart.data.datasets, function(dataset) {
- if (helpers.isDatasetVisible(dataset)) {
- helpers.each(dataset.data, function(rawValue, index) {
- var value = +this.getRightValue(rawValue);
- if (isNaN(value)) {
- return;
- }
-
- if (this.min === null) {
- this.min = value;
- } else if (value < this.min) {
- this.min = value;
- }
-
- if (this.max === null) {
- this.max = value;
- } else if (value > this.max) {
- this.max = value;
- }
- }, this);
- }
- }, this);
-
- // If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
- // do nothing since that would make the chart weird. If the user really wants a weird chart
- // axis, they can manually override it
- if (this.options.ticks.beginAtZero) {
- var minSign = helpers.sign(this.min);
- var maxSign = helpers.sign(this.max);
-
- if (minSign < 0 && maxSign < 0) {
- // move the top up to 0
- this.max = 0;
- } else if (minSign > 0 && maxSign > 0) {
- // move the botttom down to 0
- this.min = 0;
- }
- }
-
- if (this.options.ticks.min !== undefined) {
- this.min = this.options.ticks.min;
- } else if (this.options.ticks.suggestedMin !== undefined) {
- this.min = Math.min(this.min, this.options.ticks.suggestedMin);
- }
-
- if (this.options.ticks.max !== undefined) {
- this.max = this.options.ticks.max;
- } else if (this.options.ticks.suggestedMax !== undefined) {
- this.max = Math.max(this.max, this.options.ticks.suggestedMax);
- }
-
- if (this.min === this.max) {
- this.min--;
- this.max++;
- }
- },
- buildTicks: function() {
-
-
- this.ticks = [];
-
- // Figure out what the max number of ticks we can support it is based on the size of
- // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
- // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
- // the graph
- var maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
- Math.ceil(this.drawingArea / (1.5 * this.options.ticks.fontSize)));
- maxTicks = Math.max(2, maxTicks); // Make sure we always have at least 2 ticks
-
- // To get a "nice" value for the tick spacing, we will use the appropriately named
- // "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
- // for details.
-
- var niceRange = helpers.niceNum(this.max - this.min, false);
- var spacing = helpers.niceNum(niceRange / (maxTicks - 1), true);
- var niceMin = Math.floor(this.min / spacing) * spacing;
- var niceMax = Math.ceil(this.max / spacing) * spacing;
-
- var numSpaces = Math.ceil((niceMax - niceMin) / spacing);
-
- // Put the values into the ticks array
- this.ticks.push(this.options.ticks.min !== undefined ? this.options.ticks.min : niceMin);
- for (var j = 1; j < numSpaces; ++j) {
- this.ticks.push(niceMin + (j * spacing));
- }
- this.ticks.push(this.options.ticks.max !== undefined ? this.options.ticks.max : niceMax);
-
- // At this point, we need to update our max and min given the tick values since we have expanded the
- // range of the scale
- this.max = helpers.max(this.ticks);
- this.min = helpers.min(this.ticks);
-
- if (this.options.ticks.reverse) {
- this.ticks.reverse();
-
- this.start = this.max;
- this.end = this.min;
- } else {
- this.start = this.min;
- this.end = this.max;
- }
-
- this.zeroLineIndex = this.ticks.indexOf(0);
- },
- convertTicksToLabels: function() {
- Chart.Scale.prototype.convertTicksToLabels.call(this);
-
- // Point labels
- this.pointLabels = this.chart.data.labels.map(this.options.pointLabels.callback, this);
- },
- getLabelForIndex: function(index, datasetIndex) {
- return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
- },
- fit: function() {
- /*
- * Right, this is really confusing and there is a lot of maths going on here
- * The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
- *
- * Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
- *
- * Solution:
- *
- * We assume the radius of the polygon is half the size of the canvas at first
- * at each index we check if the text overlaps.
- *
- * Where it does, we store that angle and that index.
- *
- * After finding the largest index and angle we calculate how much we need to remove
- * from the shape radius to move the point inwards by that x.
- *
- * We average the left and right distances to get the maximum shape radius that can fit in the box
- * along with labels.
- *
- * Once we have that, we can find the centre point for the chart, by taking the x text protrusion
- * on each side, removing that from the size, halving it and adding the left x protrusion width.
- *
- * This will mean we have a shape fitted to the canvas, as large as it can be with the labels
- * and position it in the most space efficient manner
- *
- * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
- */
-
-
- // Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
- // Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
- var largestPossibleRadius = helpers.min([(this.height / 2 - this.options.pointLabels.fontSize - 5), this.width / 2]),
- pointPosition,
- i,
- textWidth,
- halfTextWidth,
- furthestRight = this.width,
- furthestRightIndex,
- furthestRightAngle,
- furthestLeft = 0,
- furthestLeftIndex,
- furthestLeftAngle,
- xProtrusionLeft,
- xProtrusionRight,
- radiusReductionRight,
- radiusReductionLeft,
- maxWidthRadius;
- this.ctx.font = helpers.fontString(this.options.pointLabels.fontSize, this.options.pointLabels.fontStyle, this.options.pointLabels.fontFamily);
- for (i = 0; i < this.getValueCount(); i++) {
- // 5px to space the text slightly out - similar to what we do in the draw function.
- pointPosition = this.getPointPosition(i, largestPossibleRadius);
- textWidth = this.ctx.measureText(this.pointLabels[i] ? this.pointLabels[i] : '').width + 5;
- if (i === 0 || i === this.getValueCount() / 2) {
- // If we're at index zero, or exactly the middle, we're at exactly the top/bottom
- // of the radar chart, so text will be aligned centrally, so we'll half it and compare
- // w/left and right text sizes
- halfTextWidth = textWidth / 2;
- if (pointPosition.x + halfTextWidth > furthestRight) {
- furthestRight = pointPosition.x + halfTextWidth;
- furthestRightIndex = i;
- }
- if (pointPosition.x - halfTextWidth < furthestLeft) {
- furthestLeft = pointPosition.x - halfTextWidth;
- furthestLeftIndex = i;
- }
- } else if (i < this.getValueCount() / 2) {
- // Less than half the values means we'll left align the text
- if (pointPosition.x + textWidth > furthestRight) {
- furthestRight = pointPosition.x + textWidth;
- furthestRightIndex = i;
- }
- } else if (i > this.getValueCount() / 2) {
- // More than half the values means we'll right align the text
- if (pointPosition.x - textWidth < furthestLeft) {
- furthestLeft = pointPosition.x - textWidth;
- furthestLeftIndex = i;
- }
- }
- }
-
- xProtrusionLeft = furthestLeft;
- xProtrusionRight = Math.ceil(furthestRight - this.width);
-
- furthestRightAngle = this.getIndexAngle(furthestRightIndex);
- furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);
-
- radiusReductionRight = xProtrusionRight / Math.sin(furthestRightAngle + Math.PI / 2);
- radiusReductionLeft = xProtrusionLeft / Math.sin(furthestLeftAngle + Math.PI / 2);
-
- // Ensure we actually need to reduce the size of the chart
- radiusReductionRight = (helpers.isNumber(radiusReductionRight)) ? radiusReductionRight : 0;
- radiusReductionLeft = (helpers.isNumber(radiusReductionLeft)) ? radiusReductionLeft : 0;
-
- this.drawingArea = Math.round(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2);
- this.setCenterPoint(radiusReductionLeft, radiusReductionRight);
- },
- setCenterPoint: function(leftMovement, rightMovement) {
-
- var maxRight = this.width - rightMovement - this.drawingArea,
- maxLeft = leftMovement + this.drawingArea;
-
- this.xCenter = Math.round(((maxLeft + maxRight) / 2) + this.left);
- // Always vertically in the centre as the text height doesn't change
- this.yCenter = Math.round((this.height / 2) + this.top);
- },
-
- getIndexAngle: function(index) {
- var angleMultiplier = (Math.PI * 2) / this.getValueCount();
- // Start from the top instead of right, so remove a quarter of the circle
-
- return index * angleMultiplier - (Math.PI / 2);
- },
- getDistanceFromCenterForValue: function(value) {
- if (value === null) {
- return 0; // null always in center
- }
-
- // Take into account half font size + the yPadding of the top value
- var scalingFactor = this.drawingArea / (this.max - this.min);
- if (this.options.reverse) {
- return (this.max - value) * scalingFactor;
- } else {
- return (value - this.min) * scalingFactor;
- }
- },
- getPointPosition: function(index, distanceFromCenter) {
- var thisAngle = this.getIndexAngle(index);
- return {
- x: Math.round(Math.cos(thisAngle) * distanceFromCenter) + this.xCenter,
- y: Math.round(Math.sin(thisAngle) * distanceFromCenter) + this.yCenter
- };
- },
- getPointPositionForValue: function(index, value) {
- return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
- },
- draw: function() {
- if (this.options.display) {
- var ctx = this.ctx;
- helpers.each(this.ticks, function(label, index) {
- // Don't draw a centre value (if it is minimum)
- if (index > 0 || this.options.reverse) {
- var yCenterOffset = this.getDistanceFromCenterForValue(this.ticks[index]);
- var yHeight = this.yCenter - yCenterOffset;
-
- // Draw circular lines around the scale
- if (this.options.gridLines.display) {
- ctx.strokeStyle = this.options.gridLines.color;
- ctx.lineWidth = this.options.gridLines.lineWidth;
-
- if (this.options.lineArc) {
- // Draw circular arcs between the points
- ctx.beginPath();
- ctx.arc(this.xCenter, this.yCenter, yCenterOffset, 0, Math.PI * 2);
- ctx.closePath();
- ctx.stroke();
- } else {
- // Draw straight lines connecting each index
- ctx.beginPath();
- for (var i = 0; i < this.getValueCount(); i++) {
- var pointPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.ticks[index]));
- if (i === 0) {
- ctx.moveTo(pointPosition.x, pointPosition.y);
- } else {
- ctx.lineTo(pointPosition.x, pointPosition.y);
- }
- }
- ctx.closePath();
- ctx.stroke();
- }
- }
-
- if (this.options.ticks.display) {
- ctx.font = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
-
- if (this.options.ticks.showLabelBackdrop) {
- var labelWidth = ctx.measureText(label).width;
- ctx.fillStyle = this.options.ticks.backdropColor;
- ctx.fillRect(
- this.xCenter - labelWidth / 2 - this.options.ticks.backdropPaddingX,
- yHeight - this.options.ticks.fontSize / 2 - this.options.ticks.backdropPaddingY,
- labelWidth + this.options.ticks.backdropPaddingX * 2,
- this.options.ticks.fontSize + this.options.ticks.backdropPaddingY * 2
- );
- }
-
- ctx.textAlign = 'center';
- ctx.textBaseline = "middle";
- ctx.fillStyle = this.options.ticks.fontColor;
- ctx.fillText(label, this.xCenter, yHeight);
- }
- }
- }, this);
-
- if (!this.options.lineArc) {
- ctx.lineWidth = this.options.angleLines.lineWidth;
- ctx.strokeStyle = this.options.angleLines.color;
-
- for (var i = this.getValueCount() - 1; i >= 0; i--) {
- if (this.options.angleLines.display) {
- var outerPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.options.reverse ? this.min : this.max));
- ctx.beginPath();
- ctx.moveTo(this.xCenter, this.yCenter);
- ctx.lineTo(outerPosition.x, outerPosition.y);
- ctx.stroke();
- ctx.closePath();
- }
- // Extra 3px out for some label spacing
- var pointLabelPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.options.reverse ? this.min : this.max) + 5);
- ctx.font = helpers.fontString(this.options.pointLabels.fontSize, this.options.pointLabels.fontStyle, this.options.pointLabels.fontFamily);
- ctx.fillStyle = this.options.pointLabels.fontColor;
-
- var labelsCount = this.pointLabels.length,
- halfLabelsCount = this.pointLabels.length / 2,
- quarterLabelsCount = halfLabelsCount / 2,
- upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount),
- exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount);
- if (i === 0) {
- ctx.textAlign = 'center';
- } else if (i === halfLabelsCount) {
- ctx.textAlign = 'center';
- } else if (i < halfLabelsCount) {
- ctx.textAlign = 'left';
- } else {
- ctx.textAlign = 'right';
- }
-
- // Set the correct text baseline based on outer positioning
- if (exactQuarter) {
- ctx.textBaseline = 'middle';
- } else if (upperHalf) {
- ctx.textBaseline = 'bottom';
- } else {
- ctx.textBaseline = 'top';
- }
-
- ctx.fillText(this.pointLabels[i] ? this.pointLabels[i] : '', pointLabelPosition.x, pointLabelPosition.y);
- }
- }
- }
- }
- });
- Chart.scaleService.registerScaleType("radialLinear", LinearRadialScale, defaultConfig);
-
-};
+ var helpers = Chart.helpers;
+
+ var defaultConfig = {
+ display: true,
+
+ //Boolean - Whether to animate scaling the chart from the centre
+ animate: true,
+ lineArc: false,
+ position: "chartArea",
+
+ angleLines: {
+ display: true,
+ color: "rgba(0, 0, 0, 0.1)",
+ lineWidth: 1
+ },
+
+ // label settings
+ ticks: {
+ //Boolean - Show a backdrop to the scale label
+ showLabelBackdrop: true,
+
+ //String - The colour of the label backdrop
+ backdropColor: "rgba(255,255,255,0.75)",
+
+ //Number - The backdrop padding above & below the label in pixels
+ backdropPaddingY: 2,
+
+ //Number - The backdrop padding to the side of the label in pixels
+ backdropPaddingX: 2
+ },
+
+ pointLabels: {
+ //String - Point label font declaration
+ fontFamily: Chart.defaults.global.defaultFontFamily,
+
+ //String - Point label font weight
+ fontStyle: Chart.defaults.global.defaultFontStyle,
+
+ //Number - Point label font size in pixels
+ fontSize: 10,
+
+ //String - Point label font colour
+ fontColor: Chart.defaults.global.defaultFontColor,
+
+ //Function - Used to convert point labels
+ callback: function(label) {
+ return label;
+ }
+ }
+ };
+
+ var LinearRadialScale = Chart.Scale.extend({
+ getValueCount: function() {
+ return this.chart.data.labels.length;
+ },
+ setDimensions: function() {
+ // Set the unconstrained dimension before label rotation
+ this.width = this.maxWidth;
+ this.height = this.maxHeight;
+ this.xCenter = Math.round(this.width / 2);
+ this.yCenter = Math.round(this.height / 2);
+
+ var minSize = helpers.min([this.height, this.width]);
+ this.drawingArea = (this.options.display) ? (minSize / 2) - (this.options.ticks.fontSize / 2 + this.options.ticks.backdropPaddingY) : (minSize / 2);
+ },
+ determineDataLimits: function() {
+ this.min = null;
+ this.max = null;
+
+ helpers.each(this.chart.data.datasets, function(dataset) {
+ if (helpers.isDatasetVisible(dataset)) {
+ helpers.each(dataset.data, function(rawValue, index) {
+ var value = +this.getRightValue(rawValue);
+ if (isNaN(value)) {
+ return;
+ }
+
+ if (this.min === null) {
+ this.min = value;
+ } else if (value < this.min) {
+ this.min = value;
+ }
+
+ if (this.max === null) {
+ this.max = value;
+ } else if (value > this.max) {
+ this.max = value;
+ }
+ }, this);
+ }
+ }, this);
+
+ // If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
+ // do nothing since that would make the chart weird. If the user really wants a weird chart
+ // axis, they can manually override it
+ if (this.options.ticks.beginAtZero) {
+ var minSign = helpers.sign(this.min);
+ var maxSign = helpers.sign(this.max);
+
+ if (minSign < 0 && maxSign < 0) {
+ // move the top up to 0
+ this.max = 0;
+ } else if (minSign > 0 && maxSign > 0) {
+ // move the botttom down to 0
+ this.min = 0;
+ }
+ }
+
+ if (this.options.ticks.min !== undefined) {
+ this.min = this.options.ticks.min;
+ } else if (this.options.ticks.suggestedMin !== undefined) {
+ this.min = Math.min(this.min, this.options.ticks.suggestedMin);
+ }
+
+ if (this.options.ticks.max !== undefined) {
+ this.max = this.options.ticks.max;
+ } else if (this.options.ticks.suggestedMax !== undefined) {
+ this.max = Math.max(this.max, this.options.ticks.suggestedMax);
+ }
+
+ if (this.min === this.max) {
+ this.min--;
+ this.max++;
+ }
+ },
+ buildTicks: function() {
+
+
+ this.ticks = [];
+
+ // Figure out what the max number of ticks we can support it is based on the size of
+ // the axis area. For now, we say that the minimum tick spacing in pixels must be 50
+ // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
+ // the graph
+ var maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11,
+ Math.ceil(this.drawingArea / (1.5 * this.options.ticks.fontSize)));
+ maxTicks = Math.max(2, maxTicks); // Make sure we always have at least 2 ticks
+
+ // To get a "nice" value for the tick spacing, we will use the appropriately named
+ // "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
+ // for details.
+
+ var niceRange = helpers.niceNum(this.max - this.min, false);
+ var spacing = helpers.niceNum(niceRange / (maxTicks - 1), true);
+ var niceMin = Math.floor(this.min / spacing) * spacing;
+ var niceMax = Math.ceil(this.max / spacing) * spacing;
+
+ var numSpaces = Math.ceil((niceMax - niceMin) / spacing);
+
+ // Put the values into the ticks array
+ this.ticks.push(this.options.ticks.min !== undefined ? this.options.ticks.min : niceMin);
+ for (var j = 1; j < numSpaces; ++j) {
+ this.ticks.push(niceMin + (j * spacing));
+ }
+ this.ticks.push(this.options.ticks.max !== undefined ? this.options.ticks.max : niceMax);
+
+ // At this point, we need to update our max and min given the tick values since we have expanded the
+ // range of the scale
+ this.max = helpers.max(this.ticks);
+ this.min = helpers.min(this.ticks);
+
+ if (this.options.ticks.reverse) {
+ this.ticks.reverse();
+
+ this.start = this.max;
+ this.end = this.min;
+ } else {
+ this.start = this.min;
+ this.end = this.max;
+ }
+
+ this.zeroLineIndex = this.ticks.indexOf(0);
+ },
+ convertTicksToLabels: function() {
+ Chart.Scale.prototype.convertTicksToLabels.call(this);
+
+ // Point labels
+ this.pointLabels = this.chart.data.labels.map(this.options.pointLabels.callback, this);
+ },
+ getLabelForIndex: function(index, datasetIndex) {
+ return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
+ },
+ fit: function() {
+ /*
+ * Right, this is really confusing and there is a lot of maths going on here
+ * The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
+ *
+ * Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
+ *
+ * Solution:
+ *
+ * We assume the radius of the polygon is half the size of the canvas at first
+ * at each index we check if the text overlaps.
+ *
+ * Where it does, we store that angle and that index.
+ *
+ * After finding the largest index and angle we calculate how much we need to remove
+ * from the shape radius to move the point inwards by that x.
+ *
+ * We average the left and right distances to get the maximum shape radius that can fit in the box
+ * along with labels.
+ *
+ * Once we have that, we can find the centre point for the chart, by taking the x text protrusion
+ * on each side, removing that from the size, halving it and adding the left x protrusion width.
+ *
+ * This will mean we have a shape fitted to the canvas, as large as it can be with the labels
+ * and position it in the most space efficient manner
+ *
+ * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
+ */
+
+
+ // Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
+ // Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
+ var largestPossibleRadius = helpers.min([(this.height / 2 - this.options.pointLabels.fontSize - 5), this.width / 2]),
+ pointPosition,
+ i,
+ textWidth,
+ halfTextWidth,
+ furthestRight = this.width,
+ furthestRightIndex,
+ furthestRightAngle,
+ furthestLeft = 0,
+ furthestLeftIndex,
+ furthestLeftAngle,
+ xProtrusionLeft,
+ xProtrusionRight,
+ radiusReductionRight,
+ radiusReductionLeft,
+ maxWidthRadius;
+ this.ctx.font = helpers.fontString(this.options.pointLabels.fontSize, this.options.pointLabels.fontStyle, this.options.pointLabels.fontFamily);
+ for (i = 0; i < this.getValueCount(); i++) {
+ // 5px to space the text slightly out - similar to what we do in the draw function.
+ pointPosition = this.getPointPosition(i, largestPossibleRadius);
+ textWidth = this.ctx.measureText(this.pointLabels[i] ? this.pointLabels[i] : '').width + 5;
+ if (i === 0 || i === this.getValueCount() / 2) {
+ // If we're at index zero, or exactly the middle, we're at exactly the top/bottom
+ // of the radar chart, so text will be aligned centrally, so we'll half it and compare
+ // w/left and right text sizes
+ halfTextWidth = textWidth / 2;
+ if (pointPosition.x + halfTextWidth > furthestRight) {
+ furthestRight = pointPosition.x + halfTextWidth;
+ furthestRightIndex = i;
+ }
+ if (pointPosition.x - halfTextWidth < furthestLeft) {
+ furthestLeft = pointPosition.x - halfTextWidth;
+ furthestLeftIndex = i;
+ }
+ } else if (i < this.getValueCount() / 2) {
+ // Less than half the values means we'll left align the text
+ if (pointPosition.x + textWidth > furthestRight) {
+ furthestRight = pointPosition.x + textWidth;
+ furthestRightIndex = i;
+ }
+ } else if (i > this.getValueCount() / 2) {
+ // More than half the values means we'll right align the text
+ if (pointPosition.x - textWidth < furthestLeft) {
+ furthestLeft = pointPosition.x - textWidth;
+ furthestLeftIndex = i;
+ }
+ }
+ }
+
+ xProtrusionLeft = furthestLeft;
+ xProtrusionRight = Math.ceil(furthestRight - this.width);
+
+ furthestRightAngle = this.getIndexAngle(furthestRightIndex);
+ furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);
+
+ radiusReductionRight = xProtrusionRight / Math.sin(furthestRightAngle + Math.PI / 2);
+ radiusReductionLeft = xProtrusionLeft / Math.sin(furthestLeftAngle + Math.PI / 2);
+
+ // Ensure we actually need to reduce the size of the chart
+ radiusReductionRight = (helpers.isNumber(radiusReductionRight)) ? radiusReductionRight : 0;
+ radiusReductionLeft = (helpers.isNumber(radiusReductionLeft)) ? radiusReductionLeft : 0;
+
+ this.drawingArea = Math.round(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2);
+ this.setCenterPoint(radiusReductionLeft, radiusReductionRight);
+ },
+ setCenterPoint: function(leftMovement, rightMovement) {
+
+ var maxRight = this.width - rightMovement - this.drawingArea,
+ maxLeft = leftMovement + this.drawingArea;
+
+ this.xCenter = Math.round(((maxLeft + maxRight) / 2) + this.left);
+ // Always vertically in the centre as the text height doesn't change
+ this.yCenter = Math.round((this.height / 2) + this.top);
+ },
+
+ getIndexAngle: function(index) {
+ var angleMultiplier = (Math.PI * 2) / this.getValueCount();
+ // Start from the top instead of right, so remove a quarter of the circle
+
+ return index * angleMultiplier - (Math.PI / 2);
+ },
+ getDistanceFromCenterForValue: function(value) {
+ if (value === null) {
+ return 0; // null always in center
+ }
+
+ // Take into account half font size + the yPadding of the top value
+ var scalingFactor = this.drawingArea / (this.max - this.min);
+ if (this.options.reverse) {
+ return (this.max - value) * scalingFactor;
+ } else {
+ return (value - this.min) * scalingFactor;
+ }
+ },
+ getPointPosition: function(index, distanceFromCenter) {
+ var thisAngle = this.getIndexAngle(index);
+ return {
+ x: Math.round(Math.cos(thisAngle) * distanceFromCenter) + this.xCenter,
+ y: Math.round(Math.sin(thisAngle) * distanceFromCenter) + this.yCenter
+ };
+ },
+ getPointPositionForValue: function(index, value) {
+ return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
+ },
+ draw: function() {
+ if (this.options.display) {
+ var ctx = this.ctx;
+ helpers.each(this.ticks, function(label, index) {
+ // Don't draw a centre value (if it is minimum)
+ if (index > 0 || this.options.reverse) {
+ var yCenterOffset = this.getDistanceFromCenterForValue(this.ticks[index]);
+ var yHeight = this.yCenter - yCenterOffset;
+
+ // Draw circular lines around the scale
+ if (this.options.gridLines.display) {
+ ctx.strokeStyle = this.options.gridLines.color;
+ ctx.lineWidth = this.options.gridLines.lineWidth;
+
+ if (this.options.lineArc) {
+ // Draw circular arcs between the points
+ ctx.beginPath();
+ ctx.arc(this.xCenter, this.yCenter, yCenterOffset, 0, Math.PI * 2);
+ ctx.closePath();
+ ctx.stroke();
+ } else {
+ // Draw straight lines connecting each index
+ ctx.beginPath();
+ for (var i = 0; i < this.getValueCount(); i++) {
+ var pointPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.ticks[index]));
+ if (i === 0) {
+ ctx.moveTo(pointPosition.x, pointPosition.y);
+ } else {
+ ctx.lineTo(pointPosition.x, pointPosition.y);
+ }
+ }
+ ctx.closePath();
+ ctx.stroke();
+ }
+ }
+
+ if (this.options.ticks.display) {
+ ctx.font = helpers.fontString(this.options.ticks.fontSize, this.options.ticks.fontStyle, this.options.ticks.fontFamily);
+
+ if (this.options.ticks.showLabelBackdrop) {
+ var labelWidth = ctx.measureText(label).width;
+ ctx.fillStyle = this.options.ticks.backdropColor;
+ ctx.fillRect(
+ this.xCenter - labelWidth / 2 - this.options.ticks.backdropPaddingX,
+ yHeight - this.options.ticks.fontSize / 2 - this.options.ticks.backdropPaddingY,
+ labelWidth + this.options.ticks.backdropPaddingX * 2,
+ this.options.ticks.fontSize + this.options.ticks.backdropPaddingY * 2
+ );
+ }
+
+ ctx.textAlign = 'center';
+ ctx.textBaseline = "middle";
+ ctx.fillStyle = this.options.ticks.fontColor;
+ ctx.fillText(label, this.xCenter, yHeight);
+ }
+ }
+ }, this);
+
+ if (!this.options.lineArc) {
+ ctx.lineWidth = this.options.angleLines.lineWidth;
+ ctx.strokeStyle = this.options.angleLines.color;
+
+ for (var i = this.getValueCount() - 1; i >= 0; i--) {
+ if (this.options.angleLines.display) {
+ var outerPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.options.reverse ? this.min : this.max));
+ ctx.beginPath();
+ ctx.moveTo(this.xCenter, this.yCenter);
+ ctx.lineTo(outerPosition.x, outerPosition.y);
+ ctx.stroke();
+ ctx.closePath();
+ }
+ // Extra 3px out for some label spacing
+ var pointLabelPosition = this.getPointPosition(i, this.getDistanceFromCenterForValue(this.options.reverse ? this.min : this.max) + 5);
+ ctx.font = helpers.fontString(this.options.pointLabels.fontSize, this.options.pointLabels.fontStyle, this.options.pointLabels.fontFamily);
+ ctx.fillStyle = this.options.pointLabels.fontColor;
+
+ var labelsCount = this.pointLabels.length,
+ halfLabelsCount = this.pointLabels.length / 2,
+ quarterLabelsCount = halfLabelsCount / 2,
+ upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount),
+ exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount);
+ if (i === 0) {
+ ctx.textAlign = 'center';
+ } else if (i === halfLabelsCount) {
+ ctx.textAlign = 'center';
+ } else if (i < halfLabelsCount) {
+ ctx.textAlign = 'left';
+ } else {
+ ctx.textAlign = 'right';
+ }
+
+ // Set the correct text baseline based on outer positioning
+ if (exactQuarter) {
+ ctx.textBaseline = 'middle';
+ } else if (upperHalf) {
+ ctx.textBaseline = 'bottom';
+ } else {
+ ctx.textBaseline = 'top';
+ }
+
+ ctx.fillText(this.pointLabels[i] ? this.pointLabels[i] : '', pointLabelPosition.x, pointLabelPosition.y);
+ }
+ }
+ }
+ }
+ });
+ Chart.scaleService.registerScaleType("radialLinear", LinearRadialScale, defaultConfig);
+
+};
\ No newline at end of file
module.exports = function(Chart) {
- var helpers = Chart.helpers;
-
- if (!moment) {
- console.warn('Chart.js - Moment.js could not be found! You must include it before Chart.js to use the time scale. Download at http://momentjs.com/');
- return;
- }
-
- var time = {
- units: [{
- name: 'millisecond',
- steps: [1, 2, 5, 10, 20, 50, 100, 250, 500]
- }, {
- name: 'second',
- steps: [1, 2, 5, 10, 30]
- }, {
- name: 'minute',
- steps: [1, 2, 5, 10, 30]
- }, {
- name: 'hour',
- steps: [1, 2, 3, 6, 12]
- }, {
- name: 'day',
- steps: [1, 2, 5]
- }, {
- name: 'week',
- maxStep: 4
- }, {
- name: 'month',
- maxStep: 3
- }, {
- name: 'quarter',
- maxStep: 4,
- }, {
- name: 'year',
- maxStep: false
- }, ],
- };
-
- var defaultConfig = {
- position: "bottom",
-
- time: {
- format: false, // false == date objects or use pattern string from http://momentjs.com/docs/#/parsing/string-format/
- unit: false, // false == automatic or override with week, month, year, etc.
- round: false, // none, or override with week, month, year, etc.
- displayFormat: false, // DEPRECATED
-
- // defaults to unit's corresponding unitFormat below or override using pattern string from http://momentjs.com/docs/#/displaying/format/
- displayFormats: {
- 'millisecond': 'h:mm:ss.SSS a', // 11:20:01.123 AM,
- 'second': 'h:mm:ss a', // 11:20:01 AM
- 'minute': 'h:mm:ss a', // 11:20:01 AM
- 'hour': 'MMM D, hA', // Sept 4, 5PM
- 'day': 'll', // Sep 4 2015
- 'week': 'll', // Week 46, or maybe "[W]WW - YYYY" ?
- 'month': 'MMM YYYY', // Sept 2015
- 'quarter': '[Q]Q - YYYY', // Q3
- 'year': 'YYYY', // 2015
- },
- },
- };
-
- var TimeScale = Chart.Scale.extend({
- getLabelMoment: function(datasetIndex, index) {
- return this.labelMoments[datasetIndex][index];
- },
- determineDataLimits: function() {
- this.labelMoments = [];
-
- // Only parse these once. If the dataset does not have data as x,y pairs, we will use
- // these
- var scaleLabelMoments = [];
- if (this.chart.data.labels && this.chart.data.labels.length > 0) {
- helpers.each(this.chart.data.labels, function(label, index) {
- var labelMoment = this.parseTime(label);
- if (this.options.time.round) {
- labelMoment.startOf(this.options.time.round);
- }
- scaleLabelMoments.push(labelMoment);
- }, this);
-
- this.firstTick = moment.min.call(this, scaleLabelMoments);
- this.lastTick = moment.max.call(this, scaleLabelMoments);
- } else {
- this.firstTick = null;
- this.lastTick = null;
- }
-
- helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
- var momentsForDataset = [];
-
- if (typeof dataset.data[0] === 'object') {
- helpers.each(dataset.data, function(value, index) {
- var labelMoment = this.parseTime(this.getRightValue(value));
- if (this.options.time.round) {
- labelMoment.startOf(this.options.time.round);
- }
- momentsForDataset.push(labelMoment);
-
- // May have gone outside the scale ranges, make sure we keep the first and last ticks updated
- this.firstTick = this.firstTick !== null ? moment.min(this.firstTick, labelMoment) : labelMoment;
- this.lastTick = this.lastTick !== null ? moment.max(this.lastTick, labelMoment) : labelMoment;
- }, this);
- } else {
- // We have no labels. Use the ones from the scale
- momentsForDataset = scaleLabelMoments;
- }
-
- this.labelMoments.push(momentsForDataset);
- }, this);
-
- // Set these after we've done all the data
- if (this.options.time.min) {
- this.firstTick = this.parseTime(this.options.time.min);
- }
-
- if (this.options.time.max) {
- this.lastTick = this.parseTime(this.options.time.max);
- }
-
- // We will modify these, so clone for later
- this.firstTick = (this.firstTick || moment()).clone();
- this.lastTick = (this.lastTick || moment()).clone();
- },
- buildTicks: function(index) {
-
- this.ticks = [];
- this.unitScale = 1; // How much we scale the unit by, ie 2 means 2x unit per step
-
- // Set unit override if applicable
- if (this.options.time.unit) {
- this.tickUnit = this.options.time.unit || 'day';
- this.displayFormat = this.options.time.displayFormats[this.tickUnit];
- this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit, true));
- } else {
- // Determine the smallest needed unit of the time
- var innerWidth = this.isHorizontal() ? this.width - (this.paddingLeft + this.paddingRight) : this.height - (this.paddingTop + this.paddingBottom);
- var labelCapacity = innerWidth / (this.options.ticks.fontSize + 10);
- var buffer = this.options.time.round ? 0 : 1;
-
- // Start as small as possible
- this.tickUnit = 'millisecond';
- this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit, true) + buffer);
- this.displayFormat = this.options.time.displayFormats[this.tickUnit];
-
- var unitDefinitionIndex = 0;
- var unitDefinition = time.units[unitDefinitionIndex];
-
- // While we aren't ideal and we don't have units left
- while (unitDefinitionIndex < time.units.length) {
- // Can we scale this unit. If `false` we can scale infinitely
- this.unitScale = 1;
-
- if (helpers.isArray(unitDefinition.steps) && Math.ceil(this.tickRange / labelCapacity) < helpers.max(unitDefinition.steps)) {
- // Use one of the prefedined steps
- for (var idx = 0; idx < unitDefinition.steps.length; ++idx) {
- if (unitDefinition.steps[idx] > Math.ceil(this.tickRange / labelCapacity)) {
- this.unitScale = unitDefinition.steps[idx];
- break;
- }
- }
-
- break;
- } else if ((unitDefinition.maxStep === false) || (Math.ceil(this.tickRange / labelCapacity) < unitDefinition.maxStep)) {
- // We have a max step. Scale this unit
- this.unitScale = Math.ceil(this.tickRange / labelCapacity);
- break;
- } else {
- // Move to the next unit up
- ++unitDefinitionIndex;
- unitDefinition = time.units[unitDefinitionIndex];
-
- this.tickUnit = unitDefinition.name;
- this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit) + buffer);
- this.displayFormat = this.options.time.displayFormats[unitDefinition.name];
- }
- }
- }
-
- var roundedStart;
-
- // Only round the first tick if we have no hard minimum
- if (!this.options.time.min) {
- this.firstTick.startOf(this.tickUnit);
- roundedStart = this.firstTick;
- } else {
- roundedStart = this.firstTick.clone().startOf(this.tickUnit);
- }
-
- // Only round the last tick if we have no hard maximum
- if (!this.options.time.max) {
- this.lastTick.endOf(this.tickUnit);
- }
-
- this.smallestLabelSeparation = this.width;
-
- helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
- for (var i = 1; i < this.labelMoments[datasetIndex].length; i++) {
- this.smallestLabelSeparation = Math.min(this.smallestLabelSeparation, this.labelMoments[datasetIndex][i].diff(this.labelMoments[datasetIndex][i - 1], this.tickUnit, true));
- }
- }, this);
-
- // Tick displayFormat override
- if (this.options.time.displayFormat) {
- this.displayFormat = this.options.time.displayFormat;
- }
-
- // first tick. will have been rounded correctly if options.time.min is not specified
- this.ticks.push(this.firstTick.clone());
-
- // For every unit in between the first and last moment, create a moment and add it to the ticks tick
- for (var i = 1; i < this.tickRange; ++i) {
- var newTick = roundedStart.clone().add(i, this.tickUnit);
-
- // Are we greater than the max time
- if (this.options.time.max && newTick.diff(this.lastTick, this.tickUnit, true) >= 0) {
- break;
- }
-
- if (i % this.unitScale === 0) {
- this.ticks.push(newTick);
- }
- }
-
- // Always show the right tick
- if (this.options.time.max) {
- this.ticks.push(this.lastTick.clone());
- } else if (this.ticks[this.ticks.length - 1].diff(this.lastTick, this.tickUnit, true) !== 0) {
- this.tickRange = Math.ceil(this.tickRange / this.unitScale) * this.unitScale;
- this.ticks.push(this.firstTick.clone().add(this.tickRange, this.tickUnit));
- this.lastTick = this.ticks[this.ticks.length - 1].clone();
- }
- },
- // Get tooltip label
- getLabelForIndex: function(index, datasetIndex) {
- var label = this.chart.data.labels && index < this.chart.data.labels.length ? this.chart.data.labels[index] : '';
-
- if (typeof this.chart.data.datasets[datasetIndex].data[0] === 'object') {
- label = this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
- }
-
- // Format nicely
- if (this.options.time.tooltipFormat) {
- label = this.parseTime(label).format(this.options.time.tooltipFormat);
- }
-
- return label;
- },
- convertTicksToLabels: function() {
- this.ticks = this.ticks.map(function(tick, index, ticks) {
- var formattedTick = tick.format(this.displayFormat);
-
- if (this.options.ticks.userCallback) {
- return this.options.ticks.userCallback(formattedTick, index, ticks);
- } else {
- return formattedTick;
- }
- }, this);
- },
- getPixelForValue: function(value, index, datasetIndex, includeOffset) {
- var labelMoment = this.getLabelMoment(datasetIndex, index);
- var offset = labelMoment.diff(this.firstTick, this.tickUnit, true);
-
- var decimal = offset / this.tickRange;
-
- if (this.isHorizontal()) {
- var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- var valueWidth = innerWidth / Math.max(this.ticks.length - 1, 1);
- var valueOffset = (innerWidth * decimal) + this.paddingLeft;
-
- return this.left + Math.round(valueOffset);
- } else {
- var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
- var valueHeight = innerHeight / Math.max(this.ticks.length - 1, 1);
- var heightOffset = (innerHeight * decimal) + this.paddingTop;
-
- return this.top + Math.round(heightOffset);
- }
- },
- parseTime: function(label) {
- // Date objects
- if (typeof label.getMonth === 'function' || typeof label == 'number') {
- return moment(label);
- }
- // Moment support
- if (label.isValid && label.isValid()) {
- return label;
- }
- // Custom parsing (return an instance of moment)
- if (typeof this.options.time.format !== 'string' && this.options.time.format.call) {
- return this.options.time.format(label);
- }
- // Moment format parsing
- return moment(label, this.options.time.format);
- },
- });
- Chart.scaleService.registerScaleType("time", TimeScale, defaultConfig);
-
-};
+ var helpers = Chart.helpers;
+
+ if (!moment) {
+ console.warn('Chart.js - Moment.js could not be found! You must include it before Chart.js to use the time scale. Download at http://momentjs.com/');
+ return;
+ }
+
+ var time = {
+ units: [{
+ name: 'millisecond',
+ steps: [1, 2, 5, 10, 20, 50, 100, 250, 500]
+ }, {
+ name: 'second',
+ steps: [1, 2, 5, 10, 30]
+ }, {
+ name: 'minute',
+ steps: [1, 2, 5, 10, 30]
+ }, {
+ name: 'hour',
+ steps: [1, 2, 3, 6, 12]
+ }, {
+ name: 'day',
+ steps: [1, 2, 5]
+ }, {
+ name: 'week',
+ maxStep: 4
+ }, {
+ name: 'month',
+ maxStep: 3
+ }, {
+ name: 'quarter',
+ maxStep: 4
+ }, {
+ name: 'year',
+ maxStep: false
+ }]
+ };
+
+ var defaultConfig = {
+ position: "bottom",
+
+ time: {
+ format: false, // false == date objects or use pattern string from http://momentjs.com/docs/#/parsing/string-format/
+ unit: false, // false == automatic or override with week, month, year, etc.
+ round: false, // none, or override with week, month, year, etc.
+ displayFormat: false, // DEPRECATED
+
+ // defaults to unit's corresponding unitFormat below or override using pattern string from http://momentjs.com/docs/#/displaying/format/
+ displayFormats: {
+ 'millisecond': 'h:mm:ss.SSS a', // 11:20:01.123 AM,
+ 'second': 'h:mm:ss a', // 11:20:01 AM
+ 'minute': 'h:mm:ss a', // 11:20:01 AM
+ 'hour': 'MMM D, hA', // Sept 4, 5PM
+ 'day': 'll', // Sep 4 2015
+ 'week': 'll', // Week 46, or maybe "[W]WW - YYYY" ?
+ 'month': 'MMM YYYY', // Sept 2015
+ 'quarter': '[Q]Q - YYYY', // Q3
+ 'year': 'YYYY' // 2015
+ }
+ }
+ };
+
+ var TimeScale = Chart.Scale.extend({
+ getLabelMoment: function(datasetIndex, index) {
+ return this.labelMoments[datasetIndex][index];
+ },
+ determineDataLimits: function() {
+ this.labelMoments = [];
+
+ // Only parse these once. If the dataset does not have data as x,y pairs, we will use
+ // these
+ var scaleLabelMoments = [];
+ if (this.chart.data.labels && this.chart.data.labels.length > 0) {
+ helpers.each(this.chart.data.labels, function(label, index) {
+ var labelMoment = this.parseTime(label);
+ if (this.options.time.round) {
+ labelMoment.startOf(this.options.time.round);
+ }
+ scaleLabelMoments.push(labelMoment);
+ }, this);
+
+ this.firstTick = moment.min.call(this, scaleLabelMoments);
+ this.lastTick = moment.max.call(this, scaleLabelMoments);
+ } else {
+ this.firstTick = null;
+ this.lastTick = null;
+ }
+
+ helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
+ var momentsForDataset = [];
+
+ if (typeof dataset.data[0] === 'object') {
+ helpers.each(dataset.data, function(value, index) {
+ var labelMoment = this.parseTime(this.getRightValue(value));
+ if (this.options.time.round) {
+ labelMoment.startOf(this.options.time.round);
+ }
+ momentsForDataset.push(labelMoment);
+
+ // May have gone outside the scale ranges, make sure we keep the first and last ticks updated
+ this.firstTick = this.firstTick !== null ? moment.min(this.firstTick, labelMoment) : labelMoment;
+ this.lastTick = this.lastTick !== null ? moment.max(this.lastTick, labelMoment) : labelMoment;
+ }, this);
+ } else {
+ // We have no labels. Use the ones from the scale
+ momentsForDataset = scaleLabelMoments;
+ }
+
+ this.labelMoments.push(momentsForDataset);
+ }, this);
+
+ // Set these after we've done all the data
+ if (this.options.time.min) {
+ this.firstTick = this.parseTime(this.options.time.min);
+ }
+
+ if (this.options.time.max) {
+ this.lastTick = this.parseTime(this.options.time.max);
+ }
+
+ // We will modify these, so clone for later
+ this.firstTick = (this.firstTick || moment()).clone();
+ this.lastTick = (this.lastTick || moment()).clone();
+ },
+ buildTicks: function(index) {
+
+ this.ticks = [];
+ this.unitScale = 1; // How much we scale the unit by, ie 2 means 2x unit per step
+
+ // Set unit override if applicable
+ if (this.options.time.unit) {
+ this.tickUnit = this.options.time.unit || 'day';
+ this.displayFormat = this.options.time.displayFormats[this.tickUnit];
+ this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit, true));
+ } else {
+ // Determine the smallest needed unit of the time
+ var innerWidth = this.isHorizontal() ? this.width - (this.paddingLeft + this.paddingRight) : this.height - (this.paddingTop + this.paddingBottom);
+ var labelCapacity = innerWidth / (this.options.ticks.fontSize + 10);
+ var buffer = this.options.time.round ? 0 : 1;
+
+ // Start as small as possible
+ this.tickUnit = 'millisecond';
+ this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit, true) + buffer);
+ this.displayFormat = this.options.time.displayFormats[this.tickUnit];
+
+ var unitDefinitionIndex = 0;
+ var unitDefinition = time.units[unitDefinitionIndex];
+
+ // While we aren't ideal and we don't have units left
+ while (unitDefinitionIndex < time.units.length) {
+ // Can we scale this unit. If `false` we can scale infinitely
+ this.unitScale = 1;
+
+ if (helpers.isArray(unitDefinition.steps) && Math.ceil(this.tickRange / labelCapacity) < helpers.max(unitDefinition.steps)) {
+ // Use one of the prefedined steps
+ for (var idx = 0; idx < unitDefinition.steps.length; ++idx) {
+ if (unitDefinition.steps[idx] > Math.ceil(this.tickRange / labelCapacity)) {
+ this.unitScale = unitDefinition.steps[idx];
+ break;
+ }
+ }
+
+ break;
+ } else if ((unitDefinition.maxStep === false) || (Math.ceil(this.tickRange / labelCapacity) < unitDefinition.maxStep)) {
+ // We have a max step. Scale this unit
+ this.unitScale = Math.ceil(this.tickRange / labelCapacity);
+ break;
+ } else {
+ // Move to the next unit up
+ ++unitDefinitionIndex;
+ unitDefinition = time.units[unitDefinitionIndex];
+
+ this.tickUnit = unitDefinition.name;
+ this.tickRange = Math.ceil(this.lastTick.diff(this.firstTick, this.tickUnit) + buffer);
+ this.displayFormat = this.options.time.displayFormats[unitDefinition.name];
+ }
+ }
+ }
+
+ var roundedStart;
+
+ // Only round the first tick if we have no hard minimum
+ if (!this.options.time.min) {
+ this.firstTick.startOf(this.tickUnit);
+ roundedStart = this.firstTick;
+ } else {
+ roundedStart = this.firstTick.clone().startOf(this.tickUnit);
+ }
+
+ // Only round the last tick if we have no hard maximum
+ if (!this.options.time.max) {
+ this.lastTick.endOf(this.tickUnit);
+ }
+
+ this.smallestLabelSeparation = this.width;
+
+ helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
+ for (var i = 1; i < this.labelMoments[datasetIndex].length; i++) {
+ this.smallestLabelSeparation = Math.min(this.smallestLabelSeparation, this.labelMoments[datasetIndex][i].diff(this.labelMoments[datasetIndex][i - 1], this.tickUnit, true));
+ }
+ }, this);
+
+ // Tick displayFormat override
+ if (this.options.time.displayFormat) {
+ this.displayFormat = this.options.time.displayFormat;
+ }
+
+ // first tick. will have been rounded correctly if options.time.min is not specified
+ this.ticks.push(this.firstTick.clone());
+
+ // For every unit in between the first and last moment, create a moment and add it to the ticks tick
+ for (var i = 1; i < this.tickRange; ++i) {
+ var newTick = roundedStart.clone().add(i, this.tickUnit);
+
+ // Are we greater than the max time
+ if (this.options.time.max && newTick.diff(this.lastTick, this.tickUnit, true) >= 0) {
+ break;
+ }
+
+ if (i % this.unitScale === 0) {
+ this.ticks.push(newTick);
+ }
+ }
+
+ // Always show the right tick
+ if (this.options.time.max) {
+ this.ticks.push(this.lastTick.clone());
+ } else if (this.ticks[this.ticks.length - 1].diff(this.lastTick, this.tickUnit, true) !== 0) {
+ this.tickRange = Math.ceil(this.tickRange / this.unitScale) * this.unitScale;
+ this.ticks.push(this.firstTick.clone().add(this.tickRange, this.tickUnit));
+ this.lastTick = this.ticks[this.ticks.length - 1].clone();
+ }
+ },
+ // Get tooltip label
+ getLabelForIndex: function(index, datasetIndex) {
+ var label = this.chart.data.labels && index < this.chart.data.labels.length ? this.chart.data.labels[index] : '';
+
+ if (typeof this.chart.data.datasets[datasetIndex].data[0] === 'object') {
+ label = this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
+ }
+
+ // Format nicely
+ if (this.options.time.tooltipFormat) {
+ label = this.parseTime(label).format(this.options.time.tooltipFormat);
+ }
+
+ return label;
+ },
+ convertTicksToLabels: function() {
+ this.ticks = this.ticks.map(function(tick, index, ticks) {
+ var formattedTick = tick.format(this.displayFormat);
+
+ if (this.options.ticks.userCallback) {
+ return this.options.ticks.userCallback(formattedTick, index, ticks);
+ } else {
+ return formattedTick;
+ }
+ }, this);
+ },
+ getPixelForValue: function(value, index, datasetIndex, includeOffset) {
+ var labelMoment = this.getLabelMoment(datasetIndex, index);
+ var offset = labelMoment.diff(this.firstTick, this.tickUnit, true);
+
+ var decimal = offset / this.tickRange;
+
+ if (this.isHorizontal()) {
+ var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
+ var valueWidth = innerWidth / Math.max(this.ticks.length - 1, 1);
+ var valueOffset = (innerWidth * decimal) + this.paddingLeft;
+
+ return this.left + Math.round(valueOffset);
+ } else {
+ var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
+ var valueHeight = innerHeight / Math.max(this.ticks.length - 1, 1);
+ var heightOffset = (innerHeight * decimal) + this.paddingTop;
+
+ return this.top + Math.round(heightOffset);
+ }
+ },
+ parseTime: function(label) {
+ // Date objects
+ if (typeof label.getMonth === 'function' || typeof label === 'number') {
+ return moment(label);
+ }
+ // Moment support
+ if (label.isValid && label.isValid()) {
+ return label;
+ }
+ // Custom parsing (return an instance of moment)
+ if (typeof this.options.time.format !== 'string' && this.options.time.format.call) {
+ return this.options.time.format(label);
+ }
+ // Moment format parsing
+ return moment(label, this.options.time.format);
+ }
+ });
+ Chart.scaleService.registerScaleType("time", TimeScale, defaultConfig);
+
+};
\ No newline at end of file
projects / thirdparty / Chart.js.git / commitdiff
