Angular Vector Map - Zooming and Centering

This demo shows the VectorMap zooming and centering capabilities. The map contains several cities represented by dot markers. To identify a city, pause on its marker, and the name of the city will appear in a tooltip. Moreover, if you click the marker, the map will be zoomed and centered on it. In code it is performed by calling the center(centerCoordinates) and zoomFactor(zoomFactor) methods. A click on the «Reset» button restores default center coordinates and zoom factor.

Backend API

<dx-vector-map id="vector-map" [bounds]="[-180, 85, 180, -60]" (onClick)="markerClick($event)" > <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"></dxi-vector-map-layer> </dx-vector-map> <dx-button id="reset" text="Reset" (onClick)="resetClick()"></dx-button>

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, ViewChild, enableProdMode, provideZoneChangeDetection, } from '@angular/core'; import { DxButtonModule } from 'devextreme-angular'; import { DxVectorMapModule, DxVectorMapComponent, DxVectorMapTypes } from 'devextreme-angular/ui/vector-map'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import { Marker, 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, DxButtonModule, ], }) export class AppComponent { @ViewChild(DxVectorMapComponent, { static: false }) vectorMap: DxVectorMapComponent; worldMap = mapsData.world; markers: Marker[]; constructor(service: Service) { this.markers = service.getMarkers(); } customizeTooltip(arg) { if (arg.layer.type === 'marker') { return { text: arg.attribute('name'), }; } return null; } markerClick(e: DxVectorMapTypes.ClickEvent) { if (e.target?.layer.type === 'marker') { e.component.center(e.target.coordinates()); e.component.zoomFactor(10); } } resetClick() { this.vectorMap.instance.center(null); this.vectorMap.instance.zoomFactor(null); } } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), ], });

::ng-deep #vector-map { height: 420px; display: block; } ::ng-deep #reset { margin: 10px 2px; }

import { Injectable } from '@angular/core'; export class Attributes { name: string; } export class Marker { coordinates: number[]; attributes: Attributes; } const markers: Marker[] = [ { coordinates: [-0.1262, 51.5002], attributes: { name: 'London', }, }, { coordinates: [149.1286, -35.2820], attributes: { name: 'Canberra', }, }, { coordinates: [139.6823, 35.6785], attributes: { name: 'Tokyo', }, }, { coordinates: [-77.0241, 38.8921], attributes: { name: 'Washington', }, }, { coordinates: [-75.6794, 45.4214], attributes: { name: 'Ottawa', }, }, { coordinates: [37.617778, 55.751667], attributes: { name: 'Moscow', }, }, { coordinates: [116.4, 39.933333], attributes: { name: 'Beijing', }, }, { coordinates: [12.5, 41.9], attributes: { name: 'Rome', }, }, { coordinates: [23.716667, 38], attributes: { name: 'Athens', }, }, { coordinates: [2.333333, 48.833333], attributes: { name: 'Paris', }, }, { coordinates: [-3.683333, 40.4], attributes: { name: 'Madrid', }, }, { coordinates: [-47.866667, -15.798889], attributes: { name: 'Brasilia', }, }, ]; @Injectable() export class Service { getMarkers(): Marker[] { return markers; } }

<!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>