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Pie Charts

Pie with Custom Labels

Documentation

This demo illustrates how the PieChart widget arranges labels in several columns. To maximize readability, the widget ensures that labels do not overlap one another.

www.nytimes.com
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<dx-pie-chart id="pie" title="Olympic Medals in 2008" palette="bright" [dataSource]="olympicMedals"> <dxo-legend orientation="horizontal" itemTextPosition="right" horizontalAlignment="right" verticalAlignment="bottom" [columnCount]="4"></dxo-legend> <dxo-export [enabled]="true"></dxo-export> <dxi-series argumentField="country" valueField="medals"> <dxo-label [visible]="true" position="columns" [customizeText]="customizeLabel"> <dxo-font [size]="16"></dxo-font> <dxo-connector [visible]="true" [width]="0.5"></dxo-connector> </dxo-label> </dxi-series> </dx-pie-chart>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxPieChartModule } from 'devextreme-angular'; import { MedalsInfo, Service } from './app.service'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service] }) export class AppComponent { olympicMedals: MedalsInfo[]; constructor(service: Service) { this.olympicMedals = service.getMedalsData(); } customizeLabel(arg) { return arg.valueText + " (" + arg.percentText + ")"; } } @NgModule({ imports: [ BrowserModule, DxPieChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #pie { height: 440px; }
import { Injectable } from '@angular/core'; export class MedalsInfo { country: string; medals: number; } let medals: MedalsInfo[] = [{ country: "USA", medals: 110 }, { country: "China", medals: 100 }, { country: "Russia", medals: 72 }, { country: "Britain", medals: 47 }, { country: "Australia", medals: 46 }, { country: "Germany", medals: 41 }, { country: "France", medals: 40 }, { country: "South Korea", medals: 31 }]; @Injectable() export class Service { getMedalsData(): MedalsInfo[] { return medals; } }
// 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: // https://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@17.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.2' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></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>