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VectorMap

Palette

Documentation

This demo shows how to color specific map areas using a palette. In the VectorMap widget, a palette defines a range of colors that are used to paint areas. This range is divided into segments using the value assigned to the colorGroups option. Each segment contributes a color into an array of colors.

The map in this demo represents the top 40 countries by population. Map areas are colored according to the percentage of population.

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<dx-vector-map id="vector-map" [bounds]="[-180, 85, 180, -60]"> <dxo-tooltip [enabled]="true" [customizeTooltip]="customizeTooltip"></dxo-tooltip> <dxi-layer name="areas" palette="Violet" colorGroupingField="population" [colorGroups]="[0, 0.5, 0.8, 1, 2, 3, 100]" [dataSource]="worldMap" [customize]="customizeLayers"></dxi-layer> <dxi-legend [customizeText]="customizeText"> <dxo-source layer="areas" grouping="color"></dxo-source> </dxi-legend> </dx-vector-map>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxVectorMapModule } from 'devextreme-angular'; import * as mapsData from 'vectormap-data/world.js'; import { 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 { worldMap: any = mapsData.world; populations: Object; constructor(service: Service) { this.populations = service.getPopulations(); this.customizeLayers = this.customizeLayers.bind(this); } customizeTooltip(arg) { if (arg.attribute("population")) { return { text: arg.attribute("name") + ": " + arg.attribute("population") + "% of world population" }; } } customizeLayers(elements) { elements.forEach((element) => { element.attribute("population", this.populations[element.attribute("name")]); }); } customizeText(arg) { let text; if(arg.index === 0) { text = '< 0.5%'; } else if(arg.index === 5) { text = '> 3%'; } else { text = arg.start + '% to ' + arg.end + '%'; } return text; } } @NgModule({ imports: [ BrowserModule, DxVectorMapModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #vector-map { height: 440px; width: 100%; display: block; }
import { Injectable } from '@angular/core'; let populations: Object = { "China": 19, "India": 17.4, "United States": 4.44, "Indonesia": 3.45, "Brazil": 2.83, "Pakistan": 2.62, "Nigeria": 2.42, "Bangladesh": 2.18, "Russia": 2.04, "Japan": 1.77, "Mexico": 1.67, "Philippines": 1.39, "Vietnam": 1.25, "Ethiopia": 1.23, "Egypt": 1.21, "Germany": 1.13, "Iran": 1.08, "Turkey": 1.07, "Congo (Kinshasa)": 0.94, "France": 0.92, "Thailand": 0.9, "United Kingdom": 0.89, "Italy": 0.85, "Burma": 0.84, "South Africa": 0.74, "S. Korea": 0.7, "Colombia": 0.66, "Spain": 0.65, "Tanzania": 0.63, "Kenya": 0.62, "Ukraine": 0.6, "Argentina": 0.59, "Algeria": 0.54, "Poland": 0.54, "Sudan": 0.52, "Canada": 0.49, "Uganda": 0.49, "Iraq": 0.47, "Morocco": 0.46, "Uzbekistan": 0.43 }; @Injectable() export class Service { getPopulations(): Object { return populations; } }
// 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', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'vectormap-data': 'npm:devextreme@17.2/dist/js/vectormap-data', 'jszip': 'npm:jszip@3.1.3/dist/jszip.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="js/jquery-3.1.0.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>