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95 lines
2.1 KiB
Markdown
95 lines
2.1 KiB
Markdown
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# Tick Configuration
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This sample shows how to use different tick features to control how tick labels are shown on the X axis. These features include:
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* Multi-line labels
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* Filtering labels
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* Changing the tick color
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* Changing the tick alignment for the X axis
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```js chart-editor
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// <block:actions:2>
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const actions = [
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{
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name: 'Alignment: start',
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handler(chart) {
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chart.options.scales.x.ticks.align = 'start';
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chart.update();
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}
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},
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{
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name: 'Alignment: center (default)',
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handler(chart) {
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chart.options.scales.x.ticks.align = 'center';
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chart.update();
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}
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},
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{
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name: 'Alignment: end',
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handler(chart) {
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chart.options.scales.x.ticks.align = 'end';
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chart.update();
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}
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},
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];
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// </block:actions>
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// <block:setup:1>
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const DATA_COUNT = 12;
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const NUMBER_CFG = {count: DATA_COUNT, min: 0, max: 100};
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const data = {
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labels: [['June', '2015'], 'July', 'August', 'September', 'October', 'November', 'December', ['January', '2016'], 'February', 'March', 'April', 'May'],
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datasets: [
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{
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label: 'Dataset 1',
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data: Utils.numbers(NUMBER_CFG),
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fill: false,
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borderColor: Utils.CHART_COLORS.red,
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backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
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},
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{
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label: 'Dataset 2',
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data: Utils.numbers(NUMBER_CFG),
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fill: false,
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borderColor: Utils.CHART_COLORS.blue,
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backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
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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: 'line',
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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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title: {
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display: true,
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text: 'Chart with Tick Configuration'
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}
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},
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scales: {
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x: {
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ticks: {
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// For a category axis, the val is the index so the lookup via getLabelForValue is needed
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callback: function(val, index) {
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// Hide the label of every 2nd dataset
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return index % 2 === 0 ? this.getLabelForValue(val) : '';
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},
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color: 'red',
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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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actions: actions,
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config: config,
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};
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```
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