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88 lines
1.4 KiB
Markdown
88 lines
1.4 KiB
Markdown
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# Pie Chart
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```js chart-editor
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// <block:setup:2>
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const DATA_COUNT = 5;
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Utils.srand(110);
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const actions = [
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{
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name: 'Randomize',
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handler(chart) {
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chart.data.datasets.forEach(dataset => {
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dataset.data = generateData();
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});
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chart.update();
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}
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},
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{
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name: 'Toggle Doughnut View',
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handler(chart) {
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if (chart.options.cutout) {
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chart.options.cutout = 0;
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} else {
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chart.options.cutout = '50%';
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}
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chart.update();
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}
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}
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];
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// </block:setup>
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// <block:data:1>
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function generateData() {
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return Utils.numbers({
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count: DATA_COUNT,
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min: -100,
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max: 100
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});
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}
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const data = {
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datasets: [{
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data: generateData()
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}]
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};
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// </block:data>
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// <block:options:0>
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function colorize(opaque, hover, ctx) {
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var v = ctx.parsed;
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var c = v < -50 ? '#D60000'
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: v < 0 ? '#F46300'
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: v < 50 ? '#0358B6'
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: '#44DE28';
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var opacity = hover ? 1 - Math.abs(v / 150) - 0.2 : 1 - Math.abs(v / 150);
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return opaque ? c : Utils.transparentize(c, opacity);
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}
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function hoverColorize(ctx) {
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return colorize(false, true, ctx);
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}
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const config = {
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type: 'pie',
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data: data,
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options: {
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plugins: {
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legend: false,
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tooltip: false,
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},
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elements: {
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arc: {
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backgroundColor: colorize.bind(null, false, false),
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hoverBackgroundColor: hoverColorize
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}
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}
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}
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};
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// </block:options>
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module.exports = {
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actions,
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config,
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};
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```
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