--- /dev/null
+<!doctype html>
+<html>
+
+<head>
+ <title>Line Chart</title>
+ <script src="../dist/Chart.bundle.js"></script>
+ <script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
+ <style>
+ canvas{
+ -moz-user-select: none;
+ -webkit-user-select: none;
+ -ms-user-select: none;
+ }
+ </style>
+</head>
+
+<body>
+ <div style="width:90%;">
+ <canvas id="canvas"></canvas>
+ </div>
+ <br>
+ <br>
+ <button id="randomizeData">Randomize Data</button>
+ <button id="changeDataObject">Change Data Object</button>
+ <button id="addDataset">Add Dataset</button>
+ <button id="removeDataset">Remove Dataset</button>
+ <button id="addData">Add Data</button>
+ <button id="removeData">Remove Data</button>
+ <script>
+ var MONTHS = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
+
+ var randomScalingFactor = function() {
+ return Math.round(Math.random() * 100);
+ //return 0;
+ };
+ var randomColorFactor = function() {
+ return Math.round(Math.random() * 255);
+ };
+ var randomColor = function(opacity) {
+ return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
+ };
+
+ var config = {
+ type: 'line',
+ data: {
+ labels: [["June","2015"], "July", "August", "September", "October", "November", "December", ["January","2016"],"February", "March", "April", "May"],
+ datasets: [{
+ label: "My First dataset",
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ fill: false,
+ borderDash: [5, 5],
+ }, {
+ hidden: true,
+ label: 'hidden dataset',
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ }, {
+ label: "My Second dataset",
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ }]
+ },
+ options: {
+ responsive: true,
+ title:{
+ display:true,
+ text:'Chart.js Line Chart'
+ },
+ tooltips: {
+ mode: 'label',
+ callbacks: {
+ // beforeTitle: function() {
+ // return '...beforeTitle';
+ // },
+ // afterTitle: function() {
+ // return '...afterTitle';
+ // },
+ // beforeBody: function() {
+ // return '...beforeBody';
+ // },
+ // afterBody: function() {
+ // return '...afterBody';
+ // },
+ // beforeFooter: function() {
+ // return '...beforeFooter';
+ // },
+ // footer: function() {
+ // return 'Footer';
+ // },
+ // afterFooter: function() {
+ // return '...afterFooter';
+ // },
+ }
+ },
+ hover: {
+ mode: 'dataset'
+ },
+ scales: {
+ xAxes: [{
+ display: true,
+ scaleLabel: {
+ show: true,
+ labelString: 'Month'
+ }
+ }],
+ yAxes: [{
+ display: true,
+ scaleLabel: {
+ show: true,
+ labelString: 'Value'
+ },
+ ticks: {
+ suggestedMin: -10,
+ suggestedMax: 250,
+ }
+ }]
+ }
+ }
+ };
+
+ $.each(config.data.datasets, function(i, dataset) {
+ dataset.borderColor = randomColor(0.4);
+ dataset.backgroundColor = randomColor(0.5);
+ dataset.pointBorderColor = randomColor(0.7);
+ dataset.pointBackgroundColor = randomColor(0.5);
+ dataset.pointBorderWidth = 1;
+ });
+
+ window.onload = function() {
+ var ctx = document.getElementById("canvas").getContext("2d");
+ window.myLine = new Chart(ctx, config);
+ };
+
+ $('#randomizeData').click(function() {
+ $.each(config.data.datasets, function(i, dataset) {
+ dataset.data = dataset.data.map(function() {
+ return randomScalingFactor();
+ });
+
+ });
+
+ window.myLine.update();
+ });
+
+ $('#changeDataObject').click(function() {
+ config.data = {
+ labels: ["July", "August", "September", "October", "November", "December"],
+ datasets: [{
+ label: "My First dataset",
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ fill: false,
+ }, {
+ label: "My Second dataset",
+ fill: false,
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ }]
+ };
+
+ $.each(config.data.datasets, function(i, dataset) {
+ dataset.borderColor = randomColor(0.4);
+ dataset.backgroundColor = randomColor(0.5);
+ dataset.pointBorderColor = randomColor(0.7);
+ dataset.pointBackgroundColor = randomColor(0.5);
+ dataset.pointBorderWidth = 1;
+ });
+
+ // Update the chart
+ window.myLine.update();
+ });
+
+ $('#addDataset').click(function() {
+ var newDataset = {
+ label: 'Dataset ' + config.data.datasets.length,
+ borderColor: randomColor(0.4),
+ backgroundColor: randomColor(0.5),
+ pointBorderColor: randomColor(0.7),
+ pointBackgroundColor: randomColor(0.5),
+ pointBorderWidth: 1,
+ data: [],
+ };
+
+ for (var index = 0; index < config.data.labels.length; ++index) {
+ newDataset.data.push(randomScalingFactor());
+ }
+
+ config.data.datasets.push(newDataset);
+ window.myLine.update();
+ });
+
+ $('#addData').click(function() {
+ if (config.data.datasets.length > 0) {
+ var month = MONTHS[config.data.labels.length % MONTHS.length];
+ config.data.labels.push(month);
+
+ $.each(config.data.datasets, function(i, dataset) {
+ dataset.data.push(randomScalingFactor());
+ });
+
+ window.myLine.update();
+ }
+ });
+
+ $('#removeDataset').click(function() {
+ config.data.datasets.splice(0, 1);
+ window.myLine.update();
+ });
+
+ $('#removeData').click(function() {
+ config.data.labels.splice(-1, 1); // remove the label first
+
+ config.data.datasets.forEach(function(dataset, datasetIndex) {
+ dataset.data.pop();
+ });
+
+ window.myLine.update();
+ });
+ </script>
+</body>
+
+</html>
helpers.fontString = function(pixelSize, fontStyle, fontFamily) {
return fontStyle + " " + pixelSize + "px " + fontFamily;
};
- helpers.longestText = function(ctx, font, arrayOfStrings, cache) {
+ helpers.longestText = function(ctx, font, arrayOfThings, cache) {
cache = cache || {};
var data = cache.data = cache.data || {};
var gc = cache.garbageCollect = cache.garbageCollect || [];
ctx.font = font;
var longest = 0;
- helpers.each(arrayOfStrings, function(string) {
- // Undefined strings should not be measured
- if (string !== undefined && string !== null) {
- var textWidth = data[string];
- if (!textWidth) {
- textWidth = data[string] = ctx.measureText(string).width;
- gc.push(string);
- }
-
- if (textWidth > longest) {
- longest = textWidth;
- }
+ helpers.each(arrayOfThings, function(thing) {
+ // Undefined strings and arrays should not be measured
+ if (thing !== undefined && thing !== null && helpers.isArray(thing) !== true) {
+ longest = helpers.measureText(ctx, data, gc, longest, thing);
+ } else if (helpers.isArray(thing)) {
+ // if it is an array lets measure each element
+ // to do maybe simplify this function a bit so we can do this more recursively?
+ helpers.each(thing, function(nestedThing) {
+ // Undefined strings and arrays should not be measured
+ if (nestedThing !== undefined && nestedThing !== null && helpers.isArray(nestedThing)) {
+ longest = helpers.measureText(ctx, data, gc, longest, nestedThing);
+ }
+ });
}
});
var gcLen = gc.length / 2;
- if (gcLen > arrayOfStrings.length) {
+ if (gcLen > arrayOfThings.length) {
for (var i = 0; i < gcLen; i++) {
delete data[gc[i]];
}
gc.splice(0, gcLen);
}
-
return longest;
};
+ helpers.measureText = function (ctx, data, gc, longest, string) {
+ var textWidth = data[string];
+ if (!textWidth) {
+ textWidth = data[string] = ctx.measureText(string).width;
+ gc.push(string);
+ }
+ if (textWidth > longest) {
+ longest = textWidth;
+ }
+ return longest;
+ };
+ helpers.numberOfLabelLines = function(arrayOfThings) {
+ var numberOfLines = 1;
+ helpers.each(arrayOfThings, function(thing) {
+ if (helpers.isArray(thing)) {
+ if (thing.length > numberOfLines) {
+ numberOfLines = thing.length;
+ }
+ }
+ });
+ return numberOfLines;
+ };
helpers.drawRoundedRectangle = function(ctx, x, y, width, height, radius) {
ctx.beginPath();
ctx.moveTo(x + radius, y);
autoSkipPadding: 0,
labelOffset: 0,
callback: function(value) {
- return '' + value;
+ return helpers.isArray(value) ? value : '' + value;
}
}
};
}
var largestTextWidth = helpers.longestText(this.ctx, tickLabelFont, this.ticks, this.longestTextCache);
+ var tallestLabelHeightInLines = helpers.numberOfLabelLines(this.ticks);
+ var lineSpace = tickFontSize * 0.5;
if (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 * tickFontSize;
+ var labelHeight = (Math.sin(helpers.toRadians(this.labelRotation)) * this.longestLabelWidth) + (tickFontSize * tallestLabelHeightInLines) + (lineSpace * tallestLabelHeightInLines);
minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight);
this.ctx.font = tickLabelFont;
helpers.each(this.ticks, function (label, index) {
// Blank optionTicks
var isLastTick = this.ticks.length === index + 1;
+ var lineHeight;
// Since we always show the last tick,we need may need to hide the last shown one before
var shouldSkip = (skipRatio > 1 && index % skipRatio > 0) || (index % skipRatio === 0 && index + skipRatio >= this.ticks.length);
context.font = tickLabelFont;
context.textAlign = (isRotated) ? "right" : "center";
context.textBaseline = (isRotated) ? "middle" : options.position === "top" ? "bottom" : "top";
- context.fillText(label, 0, 0);
+
+ lineHeight = context.measureText("M").width * 1.2;
+
+ if (helpers.isArray(label)) {
+ for (var i = 0, y = 0; i < label.length; ++i) {
+ context.fillText(label[i], 0, y);
+ y += lineHeight;
+ }
+ } else {
+ context.fillText(label, 0, 0);
+ }
+
context.restore();
}
}, this);
projects / thirdparty / Chart.js.git / commitdiff
