DevExtreme Angular - Access a Point Using the API

Before accessing a series point, gain access to its series by calling the getAllSeries() method. You can call the getSeriesByName(seriesName) or getSeriesByPos(seriesIndex) method as an alternative for multi-series PieCharts.

jQuery
JavaScript
var series = $("#pieChartContainer").dxPieChart("getAllSeries")[0];
Angular
TypeScript
import { ..., ViewChild } from "@angular/core";
import { DxPieChartModule, DxPieChartComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxPieChartComponent, { static: false }) pieChart: DxPieChartComponent;
    // Prior to Angular 8
    // @ViewChild(DxPieChartComponent) pieChart: DxPieChartComponent;
    series: any = [];
    getSeries() {
        this.series = this.pieChart.instance.getAllSeries()[0];
    }
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})

Use the following methods to access series points. All of them return one or several objects whose fields and methods are described in the API reference's Point section.

  • getAllPoints()
    Gets all the series points.

    jQuery
    JavaScript
    var series = $("#pieChartContainer").dxPieChart("getAllSeries")[0];
var seriesPoints = series.getAllPoints();
    Angular
    TypeScript
    import { ..., ViewChild } from "@angular/core";
import { DxPieChartModule, DxPieChartComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxPieChartComponent, { static: false }) pieChart: DxPieChartComponent;
// Prior to Angular 8
// @ViewChild(DxPieChartComponent) pieChart: DxPieChartComponent;
    seriesPoints: any = [];
    getSeriesPoints() {
        let series = this.pieChart.instance.getAllSeries()[0];
        this.seriesPoints = series.getAllPoints();
    }
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})

  • getPointsByArg(pointArg)
    Gets those series points that have a specific argument.

    jQuery
    JavaScript
    var chinaPoints = series.getPointsByArg("China");
    Angular
    TypeScript
    import { ..., ViewChild } from "@angular/core";
import { DxPieChartModule, DxPieChartComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxPieChartComponent, { static: false }) pieChart: DxPieChartComponent;
// Prior to Angular 8
// @ViewChild(DxPieChartComponent) pieChart: DxPieChartComponent;
    chinaPoints: any = {};
    getChinaPoints() {
        let series = this.pieChart.instance.getAllSeries()[0];
        this.chinaPoints = series.getPointsByArg("China");
    }
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})

  • getPointByPos(positionIndex)
    Gets a point using its index. The index is zero-based.

    jQuery
    JavaScript
    var firstPoint = series.getPointByPos(0);
    Angular
    TypeScript
    import { ..., ViewChild } from "@angular/core";
import { DxPieChartModule, DxPieChartComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxPieChartComponent, { static: false }) pieChart: DxPieChartComponent;
// Prior to Angular 8
// @ViewChild(DxPieChartComponent) pieChart: DxPieChartComponent;
    firstPoint: any = {};
    getFirstPoint() {
        let series = this.pieChart.instance.getAllSeries()[0];
        this.firstPoint = series.getPointByPos(0);
    }
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})

  • getVisiblePoints()
    Gets only visible series points.

    jQuery
    JavaScript
    var visiblePoints = series.getVisiblePoints();
    Angular
    TypeScript
    import { ..., ViewChild } from "@angular/core";
import { DxPieChartModule, DxPieChartComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxPieChartComponent, { static: false }) pieChart: DxPieChartComponent;
// Prior to Angular 8
// @ViewChild(DxPieChartComponent) pieChart: DxPieChartComponent;
    visiblePoints: any = [];
    getVisiblePoints() {
        let series = this.pieChart.instance.getAllSeries()[0];
        this.visiblePoints = series.getVisiblePoints();
    }
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})

Apart from the API methods, you can access a series point in the event handlers. For example, the onPointClick event handler gets the clicked series point in the argument.

jQuery
JavaScript
$(function() {
    $("#pieChartContainer").dxPieChart({
        // ...
        onPointClick: function (e) {
            var point = e.target;
            // ...
        }
    });
});
Angular
HTML
TypeScript
<dx-pie-chart
    (onPointClick)="onPointClick($event)">
</dx-pie-chart>
import { DxPieChartModule } from "devextreme-angular";
// ...
export class AppComponent {
    onPointClick (e) {
        let point = e.target;
        // ...
    };
}
@NgModule({
    imports: [
        // ...
        DxPieChartModule
    ],
    // ...
})
NOTE
Each Point object contains a reference to its parent series in the series field.
See Also