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Pie Charts

Pie with Annotations

Annotations are containers for images, text blocks, and custom content. Annotations can help deliver a more refined user-experience and can improve analysis and readability (by displaying additional information for visualized data).

To create annotations, populate the widget's annotations array. Each object in the array configures an individual annotation. To specify settings for all annotations, use the commonAnnotationSettings object. Individual settings take precedence over common settings.

You can set each annotation type option to "text", "image", or "custom". In this demo, the type used for all annotations is "image".

Annotations can deliver more information if you add tooltips. A tooltip appears when users hover the mouse pointer over an annotation. This demo illustrates how you can implement a tooltip with custom content via the tooltipTemplate option.

For more information on annotation settings, refer to the annotations[] help topic.

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<dx-pie-chart id="pie" palette="Vintage" [dataSource]="champions"> <dxo-common-annotation-settings type="image" color="transparent" [paddingLeftRight]="0" [paddingTopBottom]="0" tooltipTemplate="tooltipTemplate" > <dxo-image [height]="60" [width]="90" ></dxo-image> <dxo-border color="transparent"></dxo-border> </dxo-common-annotation-settings> <dxi-annotation *ngFor="let item of annotations" [argument]="item.country" [data]="item.data" [location]="item.location" [offsetX]="item.offsetX" [offsetY]="item.offsetY" [color]="item.color"> <dxo-image [url]="item.image"></dxo-image> <dxo-border [color]="item.borderColor"></dxo-border> <dxo-shadow [opacity]="item.shadowOpacity"></dxo-shadow> </dxi-annotation> <dxi-series argumentField="country" valueField="gold"> <dxo-label [visible]="true" position="inside" [radialOffset]="83" backgroundColor="transparent"> <dxo-font [size]="16" [weight]="600" ></dxo-font> </dxo-label> </dxi-series> <dxo-tooltip [paddingLeftRight]="12" [paddingTopBottom]="10" ></dxo-tooltip> <dxo-legend [visible]="false"></dxo-legend> <dxo-title text="Ice Hockey World Championship Gold Medal Winners"></dxo-title> <div *dxTemplate="let annotation of 'tooltipTemplate'" class='medal-tooltip'> <div class='country-name'>{{annotation.data.country}} <br *ngIf="annotation.data.oldCountryName"/>{{annotation.data.oldCountryName}} </div> <div class='gold'> <span class='caption'>Gold</span>: {{annotation.data.gold}} </div> <div class='silver'> <span class='caption'>Silver</span>: {{annotation.data.silver}} </div> <div class='bronze'> <span class='caption'>Bronze</span>: {{annotation.data.bronze}} </div> </div> </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 { MedalistData, AnnotationInfo, 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 { champions: MedalistData[]; annotations: AnnotationInfo[]; constructor(service: Service) { this.champions = service.getChampionsData(); this.annotations = service.getAnnotationSources(); } } @NgModule({ imports: [ BrowserModule, DxPieChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #pie { height: 440px; } ::ng-deep .medal-tooltip { font-size: 12px; } ::ng-deep .medal-tooltip .country-name { font-size: 14px; font-weight: 700; margin: 5px 0px 10px 0px; } ::ng-deep .medal-tooltip .caption { font-weight: 600; }
import { Injectable } from '@angular/core'; export class MedalistData { country?: string; oldCountryName?: string; gold?: number; silver?: number; bronze?: number; } export class AnnotationInfo { country: string; data?: MedalistData; image?: string; location?: string; offsetX?: number; offsetY?: number; color?: string; borderColor?: string; shadowOpacity?: number } let champions: MedalistData[] = [{ country: "Russia", oldCountryName: "Soviet Union", gold: 27, silver: 10, bronze: 10 }, { country: "Canada", gold: 26, silver: 15, bronze: 9 }, { country: "Czech Republic", oldCountryName: "Czechoslovakia", gold: 12, silver: 13, bronze: 21 }, { country: "Sweden", gold: 11, silver: 19, bronze: 17 }, { country: "Finland", gold: 3, silver: 8, bronze: 3 }, { country: "United States", gold: 2, silver: 9, bronze: 8 }, { country: "Great Britain", gold: 1, silver: 2, bronze: 2 }, { country: "Slovakia", gold: 1, silver: 2, bronze: 1 }]; let annotationSources: AnnotationInfo[] = [{ country: "Russia", offsetX: 15, offsetY: 5 }, { country: "Canada", offsetY: 10 }, { country: "Czech Republic", offsetX: -5, offsetY: -35 }, { country: "Sweden", offsetX: 20, offsetY: -25 }, { country: "Finland", location: "edge", offsetX: 45, offsetY: -85, }, { country: "United States", location: "edge", offsetX: 85, offsetY: -45, }, { country: "Great Britain", location: "edge", offsetX: 81, offsetY: 15 }, { country: "Slovakia", location: "edge", offsetX: 45, offsetY: 80 }]; const edgeAnnotationSettings = { color: "#aaaaaa", borderColor: "#aaaaaa", shadowOpacity: 0.3 }; @Injectable() export class Service { getChampionsData(): MedalistData[] { return champions; } getAnnotationSources(): AnnotationInfo[] { const annotations: AnnotationInfo[] = []; for(let i = 0; i < annotationSources.length; i++) { let annotation = annotationSources[i]; const country = annotation.country; const image = `../../../../images/flags/3x2/${country.replace(/\s/, "")}.svg`; const data = { ...champions.filter(d => (d.country === country))[0] }; annotations.push({ ...annotation, image, data, ...(annotation.location === "edge" ? edgeAnnotationSettings : {}) }); } return annotations; } }
// 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://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, 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@2.0.3/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', '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@20.2.4', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.5', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.8', 'devextreme-angular': 'npm:devextreme-angular@20.2.4', 'preact': 'npm:preact@10.5.7/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.7/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="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/20.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/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@0.10.2/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/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>