var LinearScale = Chart.Scale.extend({
determineDataLimits: function() {
+ var _this = this;
+ var opts = _this.options;
+ var tickOpts = opts.ticks;
+ var chart = _this.chart;
+ var data = chart.data;
+ var datasets = data.datasets;
+ var isHorizontal = _this.isHorizontal();
+
+ function IDMatches(meta) {
+ return isHorizontal ? meta.xAxisID === _this.id : meta.yAxisID === _this.id;
+ }
+
// First Calculate the range
- this.min = null;
- this.max = null;
+ _this.min = null;
+ _this.max = null;
- if (this.options.stacked) {
+ if (opts.stacked) {
var valuesPerType = {};
var hasPositiveValues = false;
var hasNegativeValues = false;
- helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
- var meta = this.chart.getDatasetMeta(datasetIndex);
+ helpers.each(datasets, function(dataset, datasetIndex) {
+ var meta = chart.getDatasetMeta(datasetIndex);
if (valuesPerType[meta.type] === undefined) {
valuesPerType[meta.type] = {
positiveValues: [],
var positiveValues = valuesPerType[meta.type].positiveValues;
var negativeValues = valuesPerType[meta.type].negativeValues;
- if (this.chart.isDatasetVisible(datasetIndex) && (this.isHorizontal() ? meta.xAxisID === this.id : meta.yAxisID === this.id)) {
+ if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
helpers.each(dataset.data, function(rawValue, index) {
- var value = +this.getRightValue(rawValue);
+ var value = +_this.getRightValue(rawValue);
if (isNaN(value) || meta.data[index].hidden) {
return;
}
positiveValues[index] = positiveValues[index] || 0;
negativeValues[index] = negativeValues[index] || 0;
- if (this.options.relativePoints) {
+ if (opts.relativePoints) {
positiveValues[index] = 100;
} else {
if (value < 0) {
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);
+ _this.min = _this.min === null ? minVal : Math.min(_this.min, minVal);
+ _this.max = _this.max === null ? maxVal : Math.max(_this.max, maxVal);
+ });
} else {
- helpers.each(this.chart.data.datasets, function(dataset, datasetIndex) {
- var meta = this.chart.getDatasetMeta(datasetIndex);
- if (this.chart.isDatasetVisible(datasetIndex) && (this.isHorizontal() ? meta.xAxisID === this.id : meta.yAxisID === this.id)) {
+ helpers.each(datasets, function(dataset, datasetIndex) {
+ var meta = chart.getDatasetMeta(datasetIndex);
+ if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
helpers.each(dataset.data, function(rawValue, index) {
- var value = +this.getRightValue(rawValue);
+ var value = +_this.getRightValue(rawValue);
if (isNaN(value) || meta.data[index].hidden) {
return;
}
- if (this.min === null) {
- this.min = value;
- } else if (value < this.min) {
- this.min = value;
+ 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;
+ 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 (tickOpts.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;
+ _this.max = 0;
} else if (minSign > 0 && maxSign > 0) {
// move the botttom down to 0
- this.min = 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 (tickOpts.min !== undefined) {
+ _this.min = tickOpts.min;
+ } else if (tickOpts.suggestedMin !== undefined) {
+ _this.min = Math.min(_this.min, tickOpts.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 (tickOpts.max !== undefined) {
+ _this.max = tickOpts.max;
+ } else if (tickOpts.suggestedMax !== undefined) {
+ _this.max = Math.max(_this.max, tickOpts.suggestedMax);
}
- if (this.min === this.max) {
- this.max++;
+ if (_this.min === _this.max) {
+ _this.max++;
- if (!this.options.ticks.beginAtZero) {
- this.min--;
+ if (!tickOpts.beginAtZero) {
+ _this.min--;
}
}
},
buildTicks: function() {
+ var _this = this;
+ var opts = _this.options;
+ var tickOpts = opts.ticks;
+ var getValueOrDefault = helpers.getValueOrDefault;
+ var isHorizontal = _this.isHorizontal();
- // Then calulate the ticks
- this.ticks = [];
+ var 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
var maxTicks;
- if (this.isHorizontal()) {
- maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11, Math.ceil(this.width / 50));
+ if (isHorizontal) {
+ maxTicks = Math.min(tickOpts.maxTicksLimit ? tickOpts.maxTicksLimit : 11, Math.ceil(_this.width / 50));
} else {
// The factor of 2 used to scale the font size has been experimentally determined.
- var tickFontSize = helpers.getValueOrDefault(this.options.ticks.fontSize, Chart.defaults.global.defaultFontSize);
- maxTicks = Math.min(this.options.ticks.maxTicksLimit ? this.options.ticks.maxTicksLimit : 11, Math.ceil(this.height / (2 * tickFontSize)));
+ var tickFontSize = getValueOrDefault(tickOpts.fontSize, Chart.defaults.global.defaultFontSize);
+ maxTicks = Math.min(tickOpts.maxTicksLimit ? tickOpts.maxTicksLimit : 11, Math.ceil(_this.height / (2 * tickFontSize)));
}
// Make sure we always have at least 2 ticks
// for details.
var spacing;
- var fixedStepSizeSet = (this.options.ticks.fixedStepSize && this.options.ticks.fixedStepSize > 0) || (this.options.ticks.stepSize && this.options.ticks.stepSize > 0);
+ var fixedStepSizeSet = (tickOpts.fixedStepSize && tickOpts.fixedStepSize > 0) || (tickOpts.stepSize && tickOpts.stepSize > 0);
if (fixedStepSizeSet) {
- spacing = helpers.getValueOrDefault(this.options.ticks.fixedStepSize, this.options.ticks.stepSize);
+ spacing = getValueOrDefault(tickOpts.fixedStepSize, tickOpts.stepSize);
} else {
- var niceRange = helpers.niceNum(this.max - this.min, false);
+ 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 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.
}
// Put the values into the ticks array
- this.ticks.push(this.options.ticks.min !== undefined ? this.options.ticks.min : niceMin);
+ ticks.push(tickOpts.min !== undefined ? tickOpts.min : niceMin);
for (var j = 1; j < numSpaces; ++j) {
- this.ticks.push(niceMin + (j * spacing));
+ ticks.push(niceMin + (j * spacing));
}
- this.ticks.push(this.options.ticks.max !== undefined ? this.options.ticks.max : niceMax);
+ ticks.push(tickOpts.max !== undefined ? tickOpts.max : niceMax);
- if (this.options.position === "left" || this.options.position === "right") {
+ if (!isHorizontal) {
// We are in a vertical orientation. The top value is the highest. So reverse the array
- this.ticks.reverse();
+ 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);
+ _this.max = helpers.max(ticks);
+ _this.min = helpers.min(ticks);
- if (this.options.ticks.reverse) {
- this.ticks.reverse();
+ if (tickOpts.reverse) {
+ ticks.reverse();
- this.start = this.max;
- this.end = this.min;
+ _this.start = _this.max;
+ _this.end = _this.min;
} else {
- this.start = this.min;
- this.end = this.max;
+ _this.start = _this.min;
+ _this.end = _this.max;
}
},
getLabelForIndex: function(index, datasetIndex) {
projects / thirdparty / Chart.js.git / commitdiff
