Angular PieChart - 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
    ],
    // ...
})
Vue
App.vue
<template> 
    <DxPieChart ref="chart">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    computed: {
        series: function() {
            return this.$refs.chart.instance.getAllSeries()[0];
        }
    }
}
</script>
React
App.js
import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.chartRef = React.createRef();
    }
    render() {
        return (
            <PieChart ref={this.chartRef}></PieChart>
        );
    }
    get chart() {
        return this.chartRef.current.instance();
    }
    getSeries () {
        return this.chart.getAllSeries()[0];
    }
}

export default App;

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
    ],
    // ...
})
    Vue
    App.vue
    <template> 
    <DxPieChart ref="chart">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    computed: {
        series: function () {
            return this.$refs.chart.instance.getAllSeries()[0];
        },
        seriesPoints: function () {
            return this.series.getAllPoints();
        }
    }
}
</script>
    React
    App.js
    import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.chartRef = React.createRef();
    }
    render() {
        return (
            <PieChart ref={this.chartRef}></PieChart>
        );
    }
    get chart() {
        return this.chartRef.current.instance();
    }
    getSeries () {
        return this.chart.getAllSeries()[0];
    }
    getSeriesPoints () {
        return this.getSeries().getAllPoints();
    }
}

export default App;

  • 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
    ],
    // ...
})
    Vue
    App.vue
    <template> 
    <DxPieChart ref="chart">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    computed: {
        series: function () {
            return this.$refs.chart.instance.getAllSeries()[0];
        },
        chinaPoints: function () {
            return this.series.getPointsByArg("China");
        }
    }
}
</script>
    React
    App.js
    import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.chartRef = React.createRef();
    }
    render() {
        return (
            <PieChart ref={this.chartRef}></PieChart>
        );
    }
    get chart() {
        return this.chartRef.current.instance();
    }
    getSeries () {
        return this.chart.getAllSeries()[0];
    }
    getChinaPoints () {
        return this.getSeries().getPointsByArg("China");
    }
}

export default App;

  • 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
    ],
    // ...
})
    Vue
    App.vue
    <template> 
    <DxPieChart ref="chart">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    computed: {
        series: function () {
            return this.$refs.chart.instance.getAllSeries()[0];
        },
        firstPoint: function () {
            return this.series.getPointByPos(0);
        }
    }
}
</script>
    React
    App.js
    import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.chartRef = React.createRef();
    }
    render() {
        return (
            <PieChart ref={this.chartRef}></PieChart>
        );
    }
    get chart() {
        return this.chartRef.current.instance();
    }
    getSeries () {
        return this.chart.getAllSeries()[0];
    }
    getFirstPoint () {
        return this.getSeries().getPointByPos(0);
    }
}

export default App;

  • 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
    ],
    // ...
})
    Vue
    App.vue
    <template> 
    <DxPieChart ref="chart">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    computed: {
        series: function () {
            return this.$refs.chart.instance.getAllSeries()[0];
        },
        visiblePoints: function () {
            return this.series.getVisiblePoints();
        }
    }
}
</script>
    React
    App.js
    import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.chartRef = React.createRef();
    }
    render() {
        return (
            <PieChart ref={this.chartRef}></PieChart>
        );
    }
    get chart() {
        return this.chartRef.current.instance();
    }
    getSeries () {
        return this.chart.getAllSeries()[0];
    }
    getVisiblePoints () {
        return this.getSeries().getVisiblePoints();
    }
}

export default App;

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
    ],
    // ...
})
Vue
App.vue
<template> 
    <DxPieChart @point-click="onPointClick">
    </DxPieChart>
</template>

<script>
import DxPieChart from 'devextreme-vue/pie-chart';

export default {
    components: {
        DxPieChart
    },
    methods: {
        onPointClick (e) {
            const point = e.target;
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';
import PieChart from 'devextreme-react/pie-chart';

class App extends React.Component {
    render() {
        return (
            <PieChart onPointClick={onPointClick}>
            </PieChart>
        );
    }
}

function onPointClick (e) {
    const point = e.target;
    // ...
}

export default App;
NOTE
Each Point object contains a reference to its parent series in the series field.
See Also
jQuery
Angular
Vue
React