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Pie Charts



The PieChart, like other DevExtreme Data Visualization JavaScript components, provides several built-in palettes. In this demo, you can use the drop-down menus under the PieChart to choose a palette and change how it is extended when it has an insufficient number of colors.

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<div class="flex-container"> <dx-pie-chart id="pie" [palette]="palette" [dataSource]="data" [paletteExtensionMode]="paletteExtensionMode"> <dxo-size [width]="500"></dxo-size> <dxo-legend [visible]="false"></dxo-legend> <dxi-series></dxi-series> </dx-pie-chart> <div class="palette-container flex-block"> <div class="palette-item" *ngFor="let color of baseColors" [style.background-color]="color"></div> </div> </div> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Palette</span> <dx-select-box [items]="paletteCollection" [(value)]="palette"> </dx-select-box> </div> <div class="option"> <span>Palette Extension Mode</span> <dx-select-box [items]="paletteExtensionModes" [(value)]="paletteExtensionMode"> </dx-select-box> </div> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxPieChartModule, DxSelectBoxModule } from 'devextreme-angular'; import { DataItem, Service } from './app.service'; import { getPalette } from "devextreme/viz/palette"; if(!/localhost/.test( { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service], preserveWhitespaces: true }) export class AppComponent { data: DataItem[] paletteCollection: string[] paletteExtensionModes: string[] paletteExtensionMode: string palette: string constructor(service: Service) { = service.getData(); this.paletteExtensionModes = service.getPaletteExtensionModes(); this.paletteCollection = service.getPaletteCollection(); this.palette = this.paletteCollection[0]; this.paletteExtensionMode = "Blend"; } get baseColors() { return getPalette(this.palette).simpleSet; } } @NgModule({ imports: [ BrowserModule, DxPieChartModule, DxSelectBoxModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
.flex-container{ display: flex; justify-content: center; align-items: center; flex-direction: row; } #pie { height: 350px; width: 500px; margin: 20px; } .palette-container{ float: left; } .palette-item{ width: 40px; height: 40px; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; } .caption { font-size: 18px; font-weight: 500; } .option { display: inline-block; min-width: 320px; margin-top: 5px; } .option > span { margin: 0 10px 0 0; } .option > .dx-widget { display: inline-block; vertical-align: middle; }
import { Injectable } from '@angular/core'; export class DataItem { arg: string; val: number; } @Injectable() export class Service { getData(): DataItem[] { return new Array(20).fill(1).map((val, index) => { return { arg: "Item" + index, val: val } }); } getPaletteCollection(): string[] { return ["Material", "Soft Pastel", "Harmony Light", "Pastel", "Bright", "Soft", "Ocean", "Office", "Vintage", "Violet", "Carmine", "Dark Moon", "Soft Blue", "Dark Violet", "Green Mist"]; } getPaletteExtensionModes(): string[] { return ["Alternate", "Blend", "Extrapolate"]; } }
// 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@2.2.0/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.7', 'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.23', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.29', 'devextreme-angular': 'npm:devextreme-angular@20.2.6', 'preact': 'npm:preact@10.5.13/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.13/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>