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<!doctype html>
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<html>
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<head>
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<title>Time Scale Point Data</title>
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<script src="../../dist/Chart.bundle.js"></script>
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<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
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<style>
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canvas {
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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</style>
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</head>
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<body>
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<div style="width:75%;">
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<canvas id="canvas"></canvas>
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</div>
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<br>
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<br>
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<button id="randomizeData">Randomize Data</button>
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<button id="addData">Add Data</button>
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<button id="removeData">Remove Data</button>
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<script>
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function randomScalingFactor() {
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return Math.round(Math.random() * 100 * (Math.random() > 0.5 ? -1 : 1));
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}
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function randomColorFactor() {
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return Math.round(Math.random() * 255);
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}
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function randomColor(opacity) {
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return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
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}
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function newDate(days) {
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return moment().add(days, 'd').toDate();
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}
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function newDateString(days) {
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return moment().add(days, 'd').format();
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}
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var config = {
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type: 'line',
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data: {
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datasets: [{
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label: "Dataset with string point data",
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data: [{
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x: newDateString(0),
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y: randomScalingFactor()
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}, {
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x: newDateString(2),
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y: randomScalingFactor()
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}, {
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x: newDateString(4),
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y: randomScalingFactor()
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}, {
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x: newDateString(5),
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y: randomScalingFactor()
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}],
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fill: false
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}, {
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label: "Dataset with date object point data",
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data: [{
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x: newDate(0),
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y: randomScalingFactor()
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}, {
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x: newDate(2),
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y: randomScalingFactor()
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}, {
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x: newDate(4),
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y: randomScalingFactor()
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}, {
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x: newDate(5),
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y: randomScalingFactor()
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}],
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fill: false
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}]
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},
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options: {
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responsive: true,
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title:{
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display:true,
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text:"Chart.js Time Point Data"
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},
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scales: {
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xAxes: [{
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type: "time",
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display: true,
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scaleLabel: {
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display: true,
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labelString: 'Date'
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}
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}],
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yAxes: [{
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display: true,
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scaleLabel: {
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display: true,
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labelString: 'value'
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}
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}]
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}
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}
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};
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$.each(config.data.datasets, function(i, dataset) {
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dataset.borderColor = randomColor(0.4);
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dataset.backgroundColor = randomColor(0.5);
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dataset.pointBorderColor = randomColor(0.7);
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dataset.pointBackgroundColor = randomColor(0.5);
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dataset.pointBorderWidth = 1;
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});
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window.onload = function() {
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var ctx = document.getElementById("canvas").getContext("2d");
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window.myLine = new Chart(ctx, config);
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};
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$('#randomizeData').click(function() {
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$.each(config.data.datasets, function(i, dataset) {
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$.each(dataset.data, function(j, dataObj) {
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dataObj.y = randomScalingFactor();
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});
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});
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window.myLine.update();
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});
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$('#addData').click(function() {
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if (config.data.datasets.length > 0) {
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var lastTime = myLine.scales['x-axis-0'].labelMoments[0].length ? myLine.scales['x-axis-0'].labelMoments[0][myLine.scales['x-axis-0'].labelMoments[0].length - 1] : moment();
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var newTime = lastTime
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.clone()
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.add(1, 'day')
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.format('MM/DD/YYYY HH:mm');
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for (var index = 0; index < config.data.datasets.length; ++index) {
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config.data.datasets[index].data.push({
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x: newTime,
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y: randomScalingFactor()
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});
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}
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window.myLine.update();
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}
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});
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$('#removeData').click(function() {
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config.data.datasets.forEach(function(dataset, datasetIndex) {
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dataset.data.pop();
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});
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window.myLine.update();
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});
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</script>
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</body>
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</html>
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