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Provide APIs to set active (hovered) and tooltip elements. Chart.setActiveElements will set the hovered items. Chart.tooltip.setActiveElements will set the tooltip items.
121 lines
2.7 KiB
HTML
121 lines
2.7 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Programmatic Event Triggers</title>
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<script src="../../dist/chart.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="container" style="width: 75%;">
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<canvas id="canvas"></canvas>
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</div>
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<button id="hover">Trigger Hover</button>
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<button id="tooltip">Trigger Tooltip</button>
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<script>
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var color = Chart.helpers.color;
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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: color(window.chartColors.red).alpha(0.5).rgbString(),
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borderColor: window.chartColors.red,
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borderWidth: 1,
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hoverBorderWidth: 5,
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hoverBorderColor: 'green',
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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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randomScalingFactor(),
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randomScalingFactor()
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]
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}, {
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label: 'Dataset 2',
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backgroundColor: color(window.chartColors.blue).alpha(0.5).rgbString(),
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borderColor: window.chartColors.blue,
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borderWidth: 1,
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hoverBorderWidth: 5,
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hoverBorderColor: 'green',
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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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randomScalingFactor(),
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randomScalingFactor()
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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('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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};
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document.getElementById('hover').addEventListener('click', function() {
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if (window.myBar.getActiveElements().length > 0) {
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window.myBar.setActiveElements([]);
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} else {
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window.myBar.setActiveElements(
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[
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{
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datasetIndex: 0,
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index: 0,
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}, {
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datasetIndex: 1,
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index: 0,
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}
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]);
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}
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window.myBar.update();
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});
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document.getElementById('tooltip').addEventListener('click', function() {
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const tooltip = window.myBar.tooltip;
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if (tooltip.getActiveElements().length > 0) {
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tooltip.setActiveElements([], {x: 0, y: 0});
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} else {
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const chartArea = window.myBar.chartArea;
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tooltip.setActiveElements(
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[
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{
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datasetIndex: 0,
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index: 2,
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}, {
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datasetIndex: 1,
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index: 2,
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}
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],
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{
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x: (chartArea.left + chartArea.right) / 2,
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y: (chartArea.top + chartArea.bottom) / 2,
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}
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);
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}
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window.myBar.update();
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});
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</script>
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</body>
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</html>
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