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Polar Chart Zooming and Scrolling 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.

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<dx-polar-chart id="zoomedChart" title="Stochastic Process" [dataSource]="dataSource"> <dxi-series type="scatter" name="Test results" valueField="value"> <dxo-point [size]="8"></dxo-point> </dxi-series> <dxi-series type="line" name="Expected average" valueField="originalValue"> <dxo-point [visible]="false"></dxo-point> </dxi-series> <dxo-common-series-settings argumentField="argument" [closed]="false"> </dxo-common-series-settings> <dxo-argument-axis [startAngle]="90" [tickInterval]="30"> </dxo-argument-axis> <dxo-value-axis [visualRange]="visualRange"></dxo-value-axis> <dxo-export [enabled]="true"></dxo-export> <dxo-legend hoverMode="excludePoints" verticalAlignment="top" horizontalAlignment="center"> </dxo-legend> </dx-polar-chart> <dx-range-selector [(value)]="visualRange"> <dxo-size [height]="100"></dxo-size> <dxo-margin [top]="10" [left]="60" [bottom]="10" [right]="50"> </dxo-margin> <dxo-scale [startValue]="0" [endValue]="8" [minorTickInterval]="0.1" [tickInterval]="1"> <dxo-minor-tick [visible]="false"></dxo-minor-tick> </dxo-scale> <dxo-behavior callValueChanged="onMoving"></dxo-behavior> </dx-range-selector>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxPolarChartModule, DxRangeSelectorModule } from 'devextreme-angular'; import { DataFrame, Service } from './app.service'; if(!/localhost/.test( { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service] }) export class AppComponent { dataSource: DataFrame[]; visualRange: any = {}; constructor(service: Service) { this.visualRange = { startValue: 0, endValue: 8 }; this.dataSource = service.getDataSource(); } } @NgModule({ imports: [ BrowserModule, DxPolarChartModule, DxRangeSelectorModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::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: originalValue, argument: i }); } return data; } @Injectable() export class Service { getDataSource(): DataFrame[] { return generateData(0, 360, 0.75); } }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': '' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.1.0/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.5', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.8/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.11', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.18', 'devextreme-angular': 'npm:devextreme-angular@20.2.5', 'preact': 'npm:preact@10.5.11/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.11/hooks/dist/hooks.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", ] });
<!DOCTYPE html> <html xmlns=""> <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=1.0" /> <link rel="stylesheet" type="text/css" href="" /> <link rel="stylesheet" type="text/css" href="" /> <script src=""></script> <script src=""></script> <script src=""></script> <script src=""></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>