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Angular Vector Map - Pie Markers

This demo shows how to use markers of the «pie» type in the VectorMap. Values for pie markers are provided by the data field whose name is assigned to the dataField property.

Backend API
<dx-vector-map id="vector-map" [bounds]="[-180, 85, 180, -60]"> <dxo-vector-map-tooltip [enabled]="true" [customizeTooltip]="customizeTooltip" ></dxo-vector-map-tooltip> <dxi-vector-map-layer [dataSource]="worldMap" [hoverEnabled]="false" ></dxi-vector-map-layer> <dxi-vector-map-layer [dataSource]="markers" name="pies" elementType="pie" dataField="values" ></dxi-vector-map-layer> <dxi-vector-map-legend [customizeText]="customizeText"> <dxo-vector-map-source layer="pies" grouping="color" ></dxo-vector-map-source> </dxi-vector-map-legend> </dx-vector-map>
import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { DxVectorMapModule } from 'devextreme-angular'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import { FeatureCollection, Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: './app.component.html', styleUrls: ['./app.component.css'], imports: [ DxVectorMapModule, ], }) export class AppComponent { worldMap = mapsData.world; markers: FeatureCollection; names: string[]; constructor(service: Service) { this.markers = service.getMarkers(); this.names = service.getNames(); this.customizeText = this.customizeText.bind(this); } customizeText = ({ index }: { index: number }) => this.names[index]; customizeTooltip = ({ layer, attribute }: { layer: Record<string, string>, attribute: Function }) => ((layer.type === 'marker') ? { text: attribute('tooltip') } : undefined); } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), ], });
::ng-deep #vector-map { height: 440px; } ::ng-deep .country { font-size: 15px; font-weight: 500; }
import { Injectable } from '@angular/core'; export class FeatureCollection { type: string; features: Feature[]; } export class Feature { type: string; properties: FeatureProperty; geometry: FeatureGeometry; } export class FeatureProperty { values: number[]; tooltip: string; } export class FeatureGeometry { type: string; coordinates: number[]; } const names: string[] = ['Christian', 'Muslim', 'Unaffiliated', 'Buddhist', 'Jewish']; const markers: FeatureCollection = { type: 'FeatureCollection', features: [{ coordinates: [34.6, -5.1], values: [61.4, 35.2, 1.4, 0, 0], country: 'Tanzania', }, { coordinates: [18.8, 15], values: [40.6, 55.3, 2.5, 0, 0], country: 'Chad', }, { coordinates: [7.36, 9.97], values: [49.3, 48.8, 0.4, 0, 0], country: 'Nigeria', }, { coordinates: [135.61, -24.57], values: [67.3, 2.4, 24.2, 2.7, 0.5], country: 'Australia', }, { coordinates: [103.3, 34.85], values: [5.1, 1.8, 52.2, 18.2, 0], country: 'China', }, { coordinates: [139.5, 37], values: [1.6, 0.2, 57, 36.2, 0], country: 'Japan', }, { coordinates: [100.8, 15.9], values: [0.9, 5.5, 0.3, 93.2, 0], country: 'Thailand', }, { coordinates: [10.4, 51.4], values: [68.7, 5.8, 24.7, 0.3, 0.3], country: 'Germany', }, { coordinates: [100.8, 65.3], values: [73.3, 10, 16.2, 0.1, 0.2], country: 'Russia', }, { coordinates: [-3.48, 40.36], values: [78.6, 2.1, 19, 0, 0.1], country: 'Spain', }, { coordinates: [-78.01, 21.72], values: [59.2, 0, 23, 0, 0], country: 'Cuba', }, { coordinates: [-63.7, -31.92], values: [85.2, 1, 12.2, 0.05, 0.5], country: 'Argentina', }, { coordinates: [-110.53, 60.78], values: [69, 2.1, 23.7, 0.5, 0.3], country: 'Canada', }, { coordinates: [-100.1, 40.14], values: [78.3, 0.9, 16.4, 1.2, 1.8], country: 'United States', }, { coordinates: [34.88, 31.16], values: [2, 18.6, 3.1, 0.3, 75.6], country: 'Israel', }].map((data) => { const list = [`<span class='country'>${data.country}</span>`, '&nbsp;']; data.values.forEach((value, i) => { if (value > 0) { list.push(`${names[i]}: ${value}%`); } }); return { type: 'Feature', geometry: { type: 'Point', coordinates: data.coordinates, }, properties: { tooltip: list.join('\n'), values: data.values, }, }; }), }; @Injectable() export class Service { getMarkers(): FeatureCollection { return markers; } getNames(): string[] { return names; } }
<!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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> </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>