Angular Charts - Polar Chart Zooming and Panning API

To zoom a PolarChart into a specific range on the value axis, specify the PolarChart's visualRange property.

In this demo, this property is bound to the RangeSelector's value. When you move the sliders in the RangeSelector, you change the visualRange and zoom the PolarChart.

Once you set the zoom level, move the selected range left and right to scroll through data.

Backend API

<dx-polar-chart id="zoomedChart" title="Stochastic Process" [dataSource]="dataSource" > <dxi-polar-chart-series type="scatter" name="Test results" valueField="value"> <dxo-polar-chart-point [size]="8"></dxo-polar-chart-point> </dxi-polar-chart-series> <dxi-polar-chart-series type="line" name="Expected average" valueField="originalValue" > <dxo-polar-chart-point [visible]="false"></dxo-polar-chart-point> </dxi-polar-chart-series> <dxo-polar-chart-common-series-settings argumentField="argument" [closed]="false" > </dxo-polar-chart-common-series-settings> <dxo-polar-chart-argument-axis [startAngle]="90" [tickInterval]="30"> </dxo-polar-chart-argument-axis> <dxo-polar-chart-value-axis [visualRange]="visualRange" ></dxo-polar-chart-value-axis> <dxo-polar-chart-export [enabled]="true"></dxo-polar-chart-export> <dxo-polar-chart-legend hoverMode="excludePoints" verticalAlignment="top" horizontalAlignment="center" > </dxo-polar-chart-legend> </dx-polar-chart> <dx-range-selector [(value)]="visualRange"> <dxo-range-selector-size [height]="100"></dxo-range-selector-size> <dxo-range-selector-margin [top]="10" [left]="60" [bottom]="10" [right]="50"> </dxo-range-selector-margin> <dxo-range-selector-scale [startValue]="0" [endValue]="8" [minorTickInterval]="0.1" [tickInterval]="1" > <dxo-range-selector-minor-tick [visible]="false" ></dxo-range-selector-minor-tick> </dxo-range-selector-scale> <dxo-range-selector-behavior valueChangeMode="onHandleMove" ></dxo-range-selector-behavior> </dx-range-selector>

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { DxRangeSelectorModule } from 'devextreme-angular'; import { DxPolarChartModule, DxPolarChartTypes } from 'devextreme-angular/ui/polar-chart'; import { DataFrame, Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: './app.component.html', styleUrls: ['./app.component.css'], providers: [Service], imports: [ DxPolarChartModule, DxRangeSelectorModule, ], }) export class AppComponent { dataSource: DataFrame[]; visualRange: DxPolarChartTypes.ValueAxis['visualRange'] = {}; constructor(service: Service) { this.visualRange = { startValue: 0, endValue: 8 }; this.dataSource = service.getDataSource(); } } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), ], });

::ng-deep #zoomedChart { height: 440px; width: 100%; }

import { Injectable } from '@angular/core'; export class DataFrame { argument: number; value: number; originalValue: number; } function generateData(start: number, end: number, step: number) { const data: DataFrame[] = []; for (let i = start; i < end; i += step) { const originalValue = Math.log(i); data.push({ value: originalValue - (Math.sin(Math.random() * i) * i / end) + (1 - Math.random() * 2), originalValue, argument: i }); } return data; } @Injectable() export class Service { getDataSource(): DataFrame[] { return generateData(0, 360, 0.75); } }

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script> <script src="./bundle.js" type="module"></script> </body> </html>