--- /dev/null
+<!doctype html>
+<html>
+
+<head>
+ <title>Chart with xAxis Filtering</title>
+ <script src="../Chart.js"></script>
+ <script src="../node_modules/jquery/dist/jquery.min.js"></script>
+ <style>
+ canvas {
+ -webkit-box-shadow: 0 0 20px 0 rgba(0, 0, 0, .5);
+ }
+ </style>
+</head>
+
+<body>
+ <div style="width:50%;">
+ <canvas id="canvas" style="width:100%;height:100%"></canvas>
+ </div>
+ <br>
+ <br>
+ <button id="randomizeData">Randomize Data</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 randomScalingFactor = function() {
+ return Math.round(Math.random() * 50 * (Math.random() > 0.5 ? 1 : 1)) + 50;
+ };
+ 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: ["January", "February", "March", "April", "May", "June", "July"],
+ datasets: [{
+ label: "My First dataset",
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ fill: false,
+ borderDash: [5, 5],
+ }, {
+ label: "My Second dataset",
+ data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+ }]
+ },
+ options: {
+ responsive: true,
+ scales: {
+ xAxes: [{
+ display: true,
+ labels: {
+ userCallback: function(dataLabel, index) {
+ return index % 2 === 0 ? dataLabel : '';
+ }
+ }
+ }],
+ yAxes: [{
+ display: true,
+ beginAtZero: false
+ }]
+ }
+ }
+ };
+
+ $.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;
+ });
+
+ console.log(config.data);
+
+ 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();
+ });
+
+ $('#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());
+ }
+
+ window.myLine.addDataset(newDataset);
+ });
+
+ $('#addData').click(function() {
+ if (config.data.datasets.length > 0) {
+ config.data.labels.push('dataset #' + config.data.labels.length);
+
+ for (var index = 0; index < config.data.datasets.length; ++index) {
+ window.myLine.addData(randomScalingFactor(), index);
+ }
+ }
+ });
+
+ $('#removeDataset').click(function() {
+ window.myLine.removeDataset(0);
+ });
+
+ $('#removeData').click(function() {
+ config.data.labels.splice(-1, 1); // remove the label first
+
+ config.data.datasets.forEach(function(dataset, datasetIndex) {
+ window.myLine.removeData(datasetIndex, -1);
+ });
+ });
+ </script>
+</body>
+
+</html>
isHorizontal: function() {
return this.options.position == "top" || this.options.position == "bottom";
},
+ buildLabels: function(index) {
+ this.labels = [];
+
+ if (this.options.labels.userCallback) {
+ this.data.labels.forEach(function(labelString, index) {
+ this.labels.push(this.options.labels.userCallback(labelString, index));
+ }, this);
+ } else {
+ this.labels = this.data.labels;
+ }
+ },
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
if (this.isHorizontal()) {
var isRotated = (this.labelRotation > 0);
var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
- var valueWidth = innerWidth / Math.max((this.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
+ var valueWidth = innerWidth / Math.max((this.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
var valueOffset = (valueWidth * index) + this.paddingLeft;
if (this.options.gridLines.offsetGridLines && includeOffset) {
return this.left + Math.round(valueOffset);
} else {
- return this.top + (index * (this.height / this.data.labels.length));
+ return this.top + (index * (this.height / this.labels.length));
}
},
getPointPixelForValue: function(value, index, datasetIndex) {
var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
this.ctx.font = labelFont;
- var firstWidth = this.ctx.measureText(this.data.labels[0]).width;
- var lastWidth = this.ctx.measureText(this.data.labels[this.data.labels.length - 1]).width;
+ var firstWidth = this.ctx.measureText(this.labels[0]).width;
+ var lastWidth = this.ctx.measureText(this.labels[this.labels.length - 1]).width;
var firstRotated;
var lastRotated;
this.labelRotation = 0;
if (this.options.display) {
- var originalLabelWidth = helpers.longestText(this.ctx, labelFont, this.data.labels);
+ var originalLabelWidth = helpers.longestText(this.ctx, labelFont, this.labels);
var cosRotation;
var sinRotation;
var firstRotatedWidth;
this.height = maxHeight;
}
+ this.buildLabels();
this.calculateLabelRotation(maxHeight, margins);
var minSize = {
};
var labelFont = helpers.fontString(this.options.labels.fontSize, this.options.labels.fontStyle, this.options.labels.fontFamily);
- var longestLabelWidth = helpers.longestText(this.ctx, labelFont, this.data.labels);
+ var longestLabelWidth = helpers.longestText(this.ctx, labelFont, this.labels);
// Width
if (this.isHorizontal()) {
var yTickEnd = this.options.position == "bottom" ? this.top + 10 : this.bottom;
var isRotated = this.labelRotation !== 0;
- helpers.each(this.data.labels, function(label, index) {
+ helpers.each(this.labels, function(label, index) {
var xLineValue = this.getPixelForValue(label, index, null, false); // xvalues for grid lines
var xLabelValue = this.getPixelForValue(label, index, null, true); // x values for labels (need to consider offsetLabel option)
projects / thirdparty / Chart.js.git / commitdiff
