mirror of
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123 lines
3.0 KiB
HTML
123 lines
3.0 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Polar Area 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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<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 id="canvas-holder" style="width:50%">
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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="addData">Add Data</button>
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<button id="removeData">Remove Data</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 chartColors = window.chartColors;
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var color = Chart.helpers.color;
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var config = {
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type: 'polarArea',
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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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color(chartColors.red).alpha(0.5).rgbString(),
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color(chartColors.orange).alpha(0.5).rgbString(),
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color(chartColors.yellow).alpha(0.5).rgbString(),
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color(chartColors.green).alpha(0.5).rgbString(),
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color(chartColors.blue).alpha(0.5).rgbString(),
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],
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label: 'My dataset' // for legend
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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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plugins: {
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legend: {
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position: 'right',
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},
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title: {
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display: true,
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text: 'Chart.js Polar Area Chart'
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},
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},
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scales: {
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r: {
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ticks: {
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beginAtZero: true
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},
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reverse: false
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}
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},
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animation: {
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animateRotate: false,
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animateScale: true
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}
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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');
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window.myPolarArea = 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(piece, i) {
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piece.data.forEach(function(value, j) {
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config.data.datasets[i].data[j] = randomScalingFactor();
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});
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});
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window.myPolarArea.update();
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});
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var colorNames = Object.keys(window.chartColors);
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document.getElementById('addData').addEventListener('click', function() {
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if (config.data.datasets.length > 0) {
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config.data.labels.push('data #' + config.data.labels.length);
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config.data.datasets.forEach(function(dataset) {
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var colorName = colorNames[config.data.labels.length % colorNames.length];
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dataset.backgroundColor.push(window.chartColors[colorName]);
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dataset.data.push(randomScalingFactor());
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});
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window.myPolarArea.update();
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}
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});
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document.getElementById('removeData').addEventListener('click', function() {
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config.data.labels.pop(); // remove the label first
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config.data.datasets.forEach(function(dataset) {
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dataset.backgroundColor.pop();
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dataset.data.pop();
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});
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window.myPolarArea.update();
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});
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</script>
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</body>
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</html>
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