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98 lines
2.2 KiB
HTML
98 lines
2.2 KiB
HTML
<!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.min.js"></script>
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<script src="../utils.js"></script>
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</head>
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<body>
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<div id="canvas-holder" style="width:40%">
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<canvas id="chart-area"></canvas>
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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 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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window.chartColors.red,
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window.chartColors.orange,
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window.chartColors.yellow,
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window.chartColors.green,
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window.chartColors.blue,
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],
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label: 'Dataset 1'
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}],
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labels: [
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'Red',
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'Orange',
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'Yellow',
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'Green',
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'Blue'
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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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document.getElementById('randomizeData').addEventListener('click', function() {
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config.data.datasets.forEach(function(dataset) {
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dataset.data = dataset.data.map(function() {
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return randomScalingFactor();
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});
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});
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window.myPie.update();
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});
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var colorNames = Object.keys(window.chartColors);
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document.getElementById('addDataset').addEventListener('click', function() {
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var newDataset = {
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backgroundColor: [],
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data: [],
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label: 'New dataset ' + config.data.datasets.length,
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};
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for (var index = 0; index < 10; ++index) {
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newDataset.data.push(randomScalingFactor());
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var colorName = colorNames[index % colorNames.length];
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var newColor = window.chartColors[colorName];
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newDataset.backgroundColor.push(newColor);
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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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document.getElementById('removeDataset').addEventListener('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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