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<!doctype html>
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<html>
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<head>
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<title>Pie Chart</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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</head>
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<body>
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<div id="canvas-holder" style="width:50%">
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<canvas id="chart-area" width="300" height="300" />
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</div>
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<button id="randomizeData">Randomize Data</button>
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<button id="addDataset">Add Dataset</button>
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<button id="removeDataset">Remove Dataset</button>
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<script>
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var randomScalingFactor = function() {
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return Math.round(Math.random() * 100);
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};
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var randomColorFactor = function() {
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return Math.round(Math.random() * 255);
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};
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var randomColor = function(opacity) {
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return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
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};
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var config = {
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type: 'pie',
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data: {
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datasets: [{
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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],
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backgroundColor: [
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"#F7464A",
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"#46BFBD",
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"#FDB45C",
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"#949FB1",
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"#4D5360",
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],
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}, {
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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],
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backgroundColor: [
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"#F7464A",
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"#46BFBD",
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"#FDB45C",
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"#949FB1",
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"#4D5360",
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],
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}, {
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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],
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backgroundColor: [
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"#F7464A",
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"#46BFBD",
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"#FDB45C",
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"#949FB1",
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"#4D5360",
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],
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}],
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labels: [
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"Red",
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"Green",
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"Yellow",
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"Grey",
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"Dark Grey"
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]
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},
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options: {
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responsive: true
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}
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};
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window.onload = function() {
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var ctx = document.getElementById("chart-area").getContext("2d");
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window.myPie = 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, piece) {
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$.each(piece.data, function(j, value) {
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config.data.datasets[i].data[j] = randomScalingFactor();
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config.data.datasets[i].backgroundColor[j] = randomColor(0.7);
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});
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});
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window.myPie.update();
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});
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$('#addDataset').click(function() {
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var newDataset = {
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backgroundColor: [randomColor(0.7), randomColor(0.7), randomColor(0.7), randomColor(0.7), randomColor(0.7)],
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data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
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};
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config.data.datasets.push(newDataset);
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window.myPie.update();
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});
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$('#removeDataset').click(function() {
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config.data.datasets.splice(0, 1);
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window.myPie.update();
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});
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</script>
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</body>
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</html>
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