56 lines
2.0 KiB
JavaScript
56 lines
2.0 KiB
JavaScript
var chart = new Chartist.Pie('.ct-chart', {
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series: [10, 20, 50, 20, 5, 50, 15],
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labels: [1, 2, 3, 4, 5, 6, 7]
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}, {
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donut: true,
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showLabel: false
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});
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chart.on('draw', function(data) {
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if(data.type === 'slice') {
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// Get the total path length in order to use for dash array animation
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var pathLength = data.element._node.getTotalLength();
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// Set a dasharray that matches the path length as prerequisite to animate dashoffset
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data.element.attr({
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'stroke-dasharray': pathLength + 'px ' + pathLength + 'px'
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});
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// Create animation definition while also assigning an ID to the animation for later sync usage
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var animationDefinition = {
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'stroke-dashoffset': {
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id: 'anim' + data.index,
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dur: 1000,
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from: -pathLength + 'px',
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to: '0px',
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easing: Chartist.Svg.Easing.easeOutQuint,
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// We need to use `fill: 'freeze'` otherwise our animation will fall back to initial (not visible)
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fill: 'freeze'
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}
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};
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// If this was not the first slice, we need to time the animation so that it uses the end sync event of the previous animation
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if(data.index !== 0) {
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animationDefinition['stroke-dashoffset'].begin = 'anim' + (data.index - 1) + '.end';
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}
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// We need to set an initial value before the animation starts as we are not in guided mode which would do that for us
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data.element.attr({
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'stroke-dashoffset': -pathLength + 'px'
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});
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// We can't use guided mode as the animations need to rely on setting begin manually
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// See http://gionkunz.github.io/chartist-js/api-documentation.html#chartistsvg-function-animate
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data.element.animate(animationDefinition, false);
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}
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});
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// For the sake of the example we update the chart every time it's created with a delay of 8 seconds
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chart.on('created', function() {
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if(window.__anim21278907124) {
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clearTimeout(window.__anim21278907124);
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window.__anim21278907124 = null;
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}
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window.__anim21278907124 = setTimeout(chart.update.bind(chart), 10000);
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});
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