Angular Data GridChart EventsEnterprise

There are several events which are raised at different points in the lifecycle of a chart.

ChartCreated

The ChartCreated event is raised whenever a chart is first created.

ChartRangeSelectionChanged

This is raised any time that the data range used to render the chart from is changed, e.g. by using the range selection handle or by making changes in the Data tab of the configuration sidebar. This event contains a cellRange object that gives you information about the range, allowing you to recreate the chart.

ChartOptionsChanged

Formatting changes made by users through the Format Panel will raise the ChartOptionsChanged event:

Here the chartThemeName will be set to the name of the currently selected theme, which will be either one of the Provided Themes or a Custom Theme if used.

ChartDestroyed

This is raised when a chart is destroyed.

Example: Chart Events

The following example demonstrates when the described events occur by writing to the console whenever they are triggered. Try the following:

• Create a chart from selection, for example, select a few cells in the "Month" and "Sunshine" columns and right-click to "Chart Range" as a "Line" chart. Notice that a "Created chart with ID id-xxxxxxxxxxxxx" message has been logged to the console.

• Shrink or expand the selection by a few cells to see the "Changed range selection of chart with ID id-xxxxxxxxxxxx" logged.

• Click the Chart Tool Panels Button inside the chart dialog to show chart settings and switch to a column chart. Notice that a "Changed options of chart with ID id-xxxxxxxxxxxxx" message has been logged to the console.

• Close the chart dialog to see the "Destroyed chart with ID id-xxxxxxxxxxx" message logged.

Event Driven Chart Updates

The following example updates the chart when ChartRangeSelectionChanged events are raised. Note that charts can be updated using the following Grid API method:

Try changing the chart cell range in the grid and notice the subtitle is updated with chart range info.

Standalone Chart Events

It is possible to subscribe to the Standalone Charts Events using the theme based configuration via the chartThemeOverrides grid option:

<ag-grid-angular
    [chartThemeOverrides]="chartThemeOverrides"
    /* other grid options ... */>
</ag-grid-angular>

this.chartThemeOverrides = {
 common: {
   legend: {
     listeners: {
       legendItemClick: (e) => console.log('legendItemClick', e)
     }
   },
   listeners: {
     seriesNodeClick: (e) => console.log('seriesNodeClick', e)
   }
 }
;

Note that chartThemeOverrides maps to the overrides Theme property.

The example below demonstrates Standalone Charts Events subscription:

• Click on the bars in the series and observe that the seriesNodeClick listener emits a console message.
• Click on a legend item and observe that the legendItemClick listener emits a console message.

Next Up

Continue to the next section to learn about: Time Series.