2019-07-12 11:22:11 +02:00
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<!doctype html>
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<html>
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<head>
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2019-07-12 17:19:21 +02:00
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<title>humidity Chart</title>
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2019-07-12 11:22:11 +02:00
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<script src="js/Chart.min.js"></script>
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<script src="js/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:30%">
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<canvas id="chart-area"></canvas>
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</div>
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<button id="changeCircleSize">Semi/Full Circle</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: 'doughnut',
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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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],
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backgroundColor: [
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window.chartColors.blue,
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window.chartColors.white,
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],
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label: 'Dataset 1'
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}],
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labels: [
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'humidity',
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]
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},
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options: {
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responsive: true,
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legend: {
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position: 'top',
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},
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title: {
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display: true,
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text: 'humidity in % '
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},
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animation: {
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animateScale: true,
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animateRotate: 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').getContext('2d');
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window.myDoughnut = new Chart(ctx, config);
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};
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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.myDoughnut.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 < config.data.labels.length; ++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.myDoughnut.update();
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});
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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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var colorName = colorNames[config.data.datasets[0].data.length % colorNames.length];
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var newColor = window.chartColors[colorName];
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config.data.datasets.forEach(function(dataset) {
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dataset.data.push(randomScalingFactor());
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dataset.backgroundColor.push(newColor);
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});
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window.myDoughnut.update();
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}
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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.myDoughnut.update();
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});
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document.getElementById('removeData').addEventListener('click', function() {
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config.data.labels.splice(-1, 1); // remove the label first
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config.data.datasets.forEach(function(dataset) {
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dataset.data.pop();
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dataset.backgroundColor.pop();
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});
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window.myDoughnut.update();
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});
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*/
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document.getElementById('changeCircleSize').addEventListener('click', function() {
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if (window.myDoughnut.options.circumference === Math.PI) {
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window.myDoughnut.options.circumference = 2 * Math.PI;
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2019-07-12 17:19:21 +02:00
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window.myDoughnut.options.rotation = -Math.PI / 2;
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2019-07-12 11:22:11 +02:00
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} else {
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window.myDoughnut.options.circumference = Math.PI;
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2019-07-12 17:19:21 +02:00
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window.myDoughnut.options.rotation = -Math.PI;
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2019-07-12 11:22:11 +02:00
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}
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window.myDoughnut.update();
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});
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</script>
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</body>
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</html>
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