archive-gh-me/Chart.js
1
0
Fork 0
mirror of https://github.com/chartjs/Chart.js.git synced 2025-12-08 20:36:08 +00:00
Code Issues Projects Releases Wiki Activity

Docs: describe catching events with plugin (#9296)

Browse Source
This commit is contained in:
Jukka Kurkela 2021-06-20 20:11:30 +03:00 committed by GitHub
parent c6976e8975
commit ed73dce18b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
docs/configuration/interactions.md
View File

@ -56,6 +56,30 @@ var chart = new Chart(ctx, {
}); });
``` ```
Events that do not fire over chartArea, like `mouseout`, can be captured using a simple plugin:
```javascript
var chart = new Chart(ctx, {
type: 'line',
data: data,
options: {
// these are the default events:
// events: ['mousemove', 'mouseout', 'click', 'touchstart', 'touchmove'],
},
plugins: [{
id: 'myEventCatcher',
beforeEvent(chart, args, pluginOptions) {
const event = args.event;
if (event.type === 'mouseout') {
// process the event
}
}
}]
});
```
For more information about plugins, see [Plugins](../developers/plugins.md)
### Converting Events to Data Values ### Converting Events to Data Values
A common occurrence is taking an event, such as a click, and finding the data coordinates on the chart where the event occurred. Chart.js provides helpers that make this a straightforward process. A common occurrence is taking an event, such as a click, and finding the data coordinates on the chart where the event occurred. Chart.js provides helpers that make this a straightforward process.