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Update bar sample to handle adding and removing datasets

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Evert Timberg 2015-06-16 22:05:20 -04:00
parent e7850a796e
commit f2298aed77
1 changed files with 20 additions and 1 deletions
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21
samples/bar.html
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@ -12,6 +12,8 @@
<canvas id="canvas" height="450" width="600"></canvas>
</div>
<button id="randomizeData">Randomize Data</button>
<button id="addDataset">Add Dataset</button>
<button id="removeDataset">Remove Dataset</button>
<script>
var randomScalingFactor = function() {
return (Math.random() > 0.5 ? 1.0 : -1.0) * Math.round(Math.random() * 100);
@ -19,6 +21,9 @@
var randomColorFactor = function() {
return Math.round(Math.random() * 255);
};
var randomColor = function() {
return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',.7)';
};
var barChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
@ -51,12 +56,26 @@
$('#randomizeData').click(function() {
var zero = Math.random() < 0.2 ? [0, 0, 0, 0, 0, 0, 0] : false;
$.each(barChartData.datasets, function(i, dataset) {
dataset.backgroundColor = 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',.7)';
dataset.backgroundColor = randomColor();
dataset.data = zero || [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()];
});
window.myBar.update();
});
$('#addDataset').click(function() {
var newDataset = {
label: 'Dataset ' + barChartData.datasets.length,
backgroundColor: randomColor(),
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
};
window.myBar.addDataset(newDataset, 1);
});
$('#removeDataset').click(function() {
window.myBar.removeDataset(0);
});
</script>
</body>