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92 lines
2.7 KiB
Markdown
92 lines
2.7 KiB
Markdown
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# Multi Series Pie
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```js chart-editor
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// <block:setup:1>
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const DATA_COUNT = 5;
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const NUMBER_CFG = {count: DATA_COUNT, min: 0, max: 100};
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const labels = Utils.months({count: 7});
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const data = {
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labels: ['Overall Yay', 'Overall Nay', 'Group A Yay', 'Group A Nay', 'Group B Yay', 'Group B Nay', 'Group C Yay', 'Group C Nay'],
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datasets: [
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{
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backgroundColor: ['#AAA', '#777'],
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data: [21, 79]
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},
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{
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backgroundColor: ['hsl(0, 100%, 60%)', 'hsl(0, 100%, 35%)'],
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data: [33, 67]
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},
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{
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backgroundColor: ['hsl(100, 100%, 60%)', 'hsl(100, 100%, 35%)'],
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data: [20, 80]
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},
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{
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backgroundColor: ['hsl(180, 100%, 60%)', 'hsl(180, 100%, 35%)'],
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data: [10, 90]
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}
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]
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};
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// </block:setup>
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// <block:config:0>
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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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responsive: true,
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plugins: {
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legend: {
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labels: {
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generateLabels: function(chart) {
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// Get the default label list
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const original = Chart.overrides.pie.plugins.legend.labels.generateLabels;
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const labelsOriginal = original.call(this, chart);
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// Build an array of colors used in the datasets of the chart
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var datasetColors = chart.data.datasets.map(function(e) {
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return e.backgroundColor;
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});
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datasetColors = datasetColors.flat();
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// Modify the color and hide state of each label
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labelsOriginal.forEach(label => {
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// There are twice as many labels as there are datasets. This converts the label index into the corresponding dataset index
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label.datasetIndex = (label.index - label.index % 2) / 2;
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// The hidden state must match the dataset's hidden state
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label.hidden = !chart.isDatasetVisible(label.datasetIndex);
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// Change the color to match the dataset
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label.fillStyle = datasetColors[label.index];
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});
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return labelsOriginal;
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}
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},
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onClick: function(mouseEvent, legendItem, legend) {
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// toggle the visibility of the dataset from what it currently is
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legend.chart.getDatasetMeta(
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legendItem.datasetIndex
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).hidden = legend.chart.isDatasetVisible(legendItem.datasetIndex);
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legend.chart.update();
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}
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},
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tooltip: {
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callbacks: {
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label: function(context) {
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const labelIndex = (context.datasetIndex * 2) + context.dataIndex;
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return context.chart.data.labels[labelIndex] + ': ' + context.formattedValue;
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}
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}
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}
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}
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},
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};
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// </block:config>
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module.exports = {
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config: config,
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};
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```
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