Zooming and Centering
Documentation
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.
Feel free to share demo-related thoughts here.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
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<dx-vector-map
id="vector-map"
[bounds]="[-180, 85, 180, -60]"
(onClick)="markerClick($event)">
<dxo-tooltip
[enabled]="true"
[customizeTooltip]="customizeTooltip"></dxo-tooltip>
<dxi-layer
[dataSource]="worldMap"
[hoverEnabled]="false"></dxi-layer>
<dxi-layer [dataSource]="markers"></dxi-layer>
</dx-vector-map>
<dx-button
id="reset"
text="Reset"
(onClick)="resetClick()"></dx-button>
import { NgModule, Component, ViewChild, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxVectorMapComponent, DxVectorMapModule, DxButtonModule } from 'devextreme-angular';
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/app.component.html',
styleUrls: ['app/app.component.css']
})
export class AppComponent {
@ViewChild(DxVectorMapComponent, { static: false }) vectorMap: DxVectorMapComponent
worldMap: any = mapsData.world;
markers: Marker[];
constructor(service: Service) {
this.markers = service.getMarkers();
}
customizeTooltip(arg) {
if(arg.layer.type === "marker") {
return {
text: arg.attribute("name")
};
}
}
markerClick(e) {
if(e.target && e.target.layer.type === "marker") {
e.component.center(e.target.coordinates()).zoomFactor(10);
}
}
resetClick() {
this.vectorMap.instance.center(null);
this.vectorMap.instance.zoomFactor(null);
}
}
@NgModule({
imports: [
BrowserModule,
DxVectorMapModule,
DxButtonModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::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;
}
let 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;
}
}
// 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/dist/js/vectormap-data/*': {
'esModule': true
},
'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@2.1.0/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'devextreme/dist/js/vectormap-data': 'js/vectormap-data',
'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@20.2.6',
'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@2.0.18',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24',
'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="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/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/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="https://unpkg.com/jquery@3.5.1/dist/jquery.min.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>