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Bar stacked sample

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Evert Timberg 2015-06-12 19:10:11 -04:00
parent e9f206606d
commit 1e01e29f88
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<!doctype html>
<html>
<head>
<title>Bar Chart</title>
<script src="../node_modules/jquery/dist/jquery.min.js"></script>
<script src="../Chart.js"></script>
</head>
<body>
<div style="width: 50%">
<canvas id="canvas" height="450" width="600"></canvas>
</div>
<button id="randomizeData">Randomize Data</button>
<script>
var randomScalingFactor = function() {
return (Math.random() > 0.5 ? 1.0 : -1.0) * Math.round(Math.random() * 100);
};
var randomColorFactor = function() {
return Math.round(Math.random() * 255);
};
var barChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [{
label: 'Dataset 1',
backgroundColor: "rgba(220,220,220,0.5)",
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
}, {
label: 'Dataset 2',
backgroundColor: "rgba(151,187,205,0.5)",
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
}, {
label: 'Dataset 3',
backgroundColor: "rgba(151,187,205,0.5)",
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
}]
};
window.onload = function() {
var ctx = document.getElementById("canvas").getContext("2d");
window.myBar = new Chart(ctx).Bar({
data: barChartData,
options: {
responsive: true,
stacked: true,
}
});
};
$('#randomizeData').click(function() {
$.each(barChartData.datasets, function(i, dataset) {
dataset.backgroundColor = 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',.7)';
dataset.data = [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()];
});
window.myBar.update();
});
</script>
</body>
</html>