mirror of
https://github.com/chartjs/Chart.js.git
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146 lines
4.9 KiB
HTML
146 lines
4.9 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Bar Chart</title>
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<script src="../node_modules/jquery/dist/jquery.min.js"></script>
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<script src="../Chart.js"></script>
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<style type="text/css">
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canvas {
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border: 1px solid red;
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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="container" style="width: 50%; height: 25%;">
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<canvas id="canvas" height="450" width="600"></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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<button id="addData">Add Data</button>
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<button id="removeData">Remove Data</button>
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<button id="show">Show</button>
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<div>
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<h3>Legend</h3>
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<div id="legendContainer">
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</div>
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</div>
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<script>
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var randomScalingFactor = function() {
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return (Math.random() > 0.5 ? 1.0 : -1.0) * 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() {
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return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',.7)';
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};
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var barChartData = {
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labels: ["January", "February", "March", "April", "May", "June", "July"],
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datasets: [{
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label: 'Dataset 1',
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backgroundColor: "rgba(220,220,220,0.5)",
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data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
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}, {
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hidden: true,
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label: 'Dataset 2',
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backgroundColor: "rgba(151,187,205,0.5)",
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data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
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}, {
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label: 'Dataset 3',
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backgroundColor: "rgba(151,187,205,0.5)",
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data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
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}]
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};
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function updateLegend() {
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$legendContainer = $('#legendContainer');
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$legendContainer.empty();
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$legendContainer.append(window.myBar.generateLegend());
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}
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window.onload = function() {
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var ctx = document.getElementById("canvas").getContext("2d");
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window.myBar = new Chart(ctx, {
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type: 'bar',
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data: barChartData,
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options: {
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responsive: true,
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}
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});
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updateLegend();
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};
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$('#randomizeData').click(function() {
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var zero = Math.random() < 0.2 ? true : false;
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$.each(barChartData.datasets, function(i, dataset) {
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dataset.backgroundColor = randomColor();
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dataset.data = dataset.data.map(function() {
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return zero ? 0.0 : randomScalingFactor();
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});
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});
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window.myBar.update();
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updateLegend();
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});
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$('#addDataset').click(function() {
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var newDataset = {
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label: 'Dataset ' + barChartData.datasets.length,
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backgroundColor: randomColor(),
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data: []
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};
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for (var index = 0; index < barChartData.labels.length; ++index) {
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newDataset.data.push(randomScalingFactor());
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}
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barChartData.datasets.push(newDataset);
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window.myBar.update();
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updateLegend();
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});
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$('#addData').click(function() {
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if (barChartData.datasets.length > 0) {
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barChartData.labels.push('data #' + barChartData.labels.length);
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for (var index = 0; index < barChartData.datasets.length; ++index) {
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//window.myBar.addData(randomScalingFactor(), index);
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barChartData.datasets[index].data.push(randomScalingFactor());
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}
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window.myBar.update();
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updateLegend();
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}
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});
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$('#removeDataset').click(function() {
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barChartData.datasets.splice(0, 1);
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window.myBar.update();
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updateLegend();
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});
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$('#removeData').click(function() {
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barChartData.labels.splice(-1, 1); // remove the label first
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barChartData.datasets.forEach(function(dataset, datasetIndex) {
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dataset.data.pop();
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});
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window.myBar.update();
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updateLegend();
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});
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$('#show').click(function() {
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document.getElementById('container').style.display = '';
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});
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</script>
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</body>
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</html>
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