Angular Chart - Overview
A tooltip is a small pop-up rectangle displaying information about a series point that the user pauses on. By default, the information is the point value, but it is possible to display anything in a tooltip.
All properties configuring tooltips are collected in the tooltip object. For example, to enable the tooltips, assign true to the enabled property of this object.
- <dx-chart ... >
- <dxo-tooltip
- [enabled]="true">
- </dxo-tooltip>
- </dx-chart>
- import { DxChartModule } from "devextreme-angular";
- // ...
- export class AppComponent {
- // ...
- }
- @NgModule({
- imports: [
- // ...
- DxChartModule
- ],
- // ...
- })
Properties declared in the tooltip object apply to all tooltips in the Chart. If you want to customize a specific tooltip, assign a function to the customizeTooltip property. This function must return an object with properties for the tooltip that you want to customize.
- <dx-chart ... >
- <dxo-tooltip
- [enabled]="true"
- color="yellow"
- [customizeTooltip]="customizeTooltip">
- </dxo-tooltip>
- </dx-chart>
- import { DxChartModule } from "devextreme-angular";
- // ...
- export class AppComponent {
- // Paints the tooltips of all points whose value is more than 100 in red
- // Other tooltips remain painted in yellow
- customizeTooltip (pointInfo: any) {
- return pointInfo.value > 100 ? { color: 'red' } : { };
- };
- }
- @NgModule({
- imports: [
- // ...
- DxChartModule
- ],
- // ...
- })
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.