chart.js
Version:
Simple HTML5 charts using the canvas element.
150 lines (130 loc) • 5.57 kB
HTML
<html>
<head>
<title>Horizontal Bar Chart</title>
<script src="../../../dist/Chart.bundle.js"></script>
<script src="../../utils.js"></script>
<style>
canvas {
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
</style>
</head>
<body>
<div id="container" style="width: 75%;">
<canvas id="canvas"></canvas>
</div>
<button id="randomizeData">Randomize Data</button>
<button id="addDataset">Add Dataset</button>
<button id="removeDataset">Remove Dataset</button>
<button id="addData">Add Data</button>
<button id="removeData">Remove Data</button>
<script>
var MONTHS = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var color = Chart.helpers.color;
var horizontalBarChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [{
label: 'Dataset 1',
backgroundColor: color(window.chartColors.red).alpha(0.5).rgbString(),
borderColor: window.chartColors.red,
borderWidth: 1,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}, {
label: 'Dataset 2',
backgroundColor: color(window.chartColors.blue).alpha(0.5).rgbString(),
borderColor: window.chartColors.blue,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}]
};
window.onload = function() {
var ctx = document.getElementById("canvas").getContext("2d");
window.myHorizontalBar = new Chart(ctx, {
type: 'horizontalBar',
data: horizontalBarChartData,
options: {
// Elements options apply to all of the options unless overridden in a dataset
// In this case, we are setting the border of each horizontal bar to be 2px wide
elements: {
rectangle: {
borderWidth: 2,
}
},
responsive: true,
legend: {
position: 'right',
},
title: {
display: true,
text: 'Chart.js Horizontal Bar Chart'
}
}
});
};
document.getElementById('randomizeData').addEventListener('click', function() {
var zero = Math.random() < 0.2 ? true : false;
horizontalBarChartData.datasets.forEach(function(dataset) {
dataset.data = dataset.data.map(function() {
return zero ? 0.0 : randomScalingFactor();
});
});
window.myHorizontalBar.update();
});
var colorNames = Object.keys(window.chartColors);
document.getElementById('addDataset').addEventListener('click', function() {
var colorName = colorNames[horizontalBarChartData.datasets.length % colorNames.length];;
var dsColor = window.chartColors[colorName];
var newDataset = {
label: 'Dataset ' + horizontalBarChartData.datasets.length,
backgroundColor: color(dsColor).alpha(0.5).rgbString(),
borderColor: dsColor,
data: []
};
for (var index = 0; index < horizontalBarChartData.labels.length; ++index) {
newDataset.data.push(randomScalingFactor());
}
horizontalBarChartData.datasets.push(newDataset);
window.myHorizontalBar.update();
});
document.getElementById('addData').addEventListener('click', function() {
if (horizontalBarChartData.datasets.length > 0) {
var month = MONTHS[horizontalBarChartData.labels.length % MONTHS.length];
horizontalBarChartData.labels.push(month);
for (var index = 0; index < horizontalBarChartData.datasets.length; ++index) {
horizontalBarChartData.datasets[index].data.push(randomScalingFactor());
}
window.myHorizontalBar.update();
}
});
document.getElementById('removeDataset').addEventListener('click', function() {
horizontalBarChartData.datasets.splice(0, 1);
window.myHorizontalBar.update();
});
document.getElementById('removeData').addEventListener('click', function() {
horizontalBarChartData.labels.splice(-1, 1); // remove the label first
horizontalBarChartData.datasets.forEach(function (dataset, datasetIndex) {
dataset.data.pop();
});
window.myHorizontalBar.update();
});
</script>
</body>
</html>