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Tree Map

Drill Down

Documentation

The TreeMap component provides an API for implementing the drill-down functionality. Click a group in the TreeMap to drill down it. A set of clickable labels, which allow you to navigate back, will appear.

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Backend API
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<dx-tree-map [dataSource]="citiesPopulations" [interactWithGroup]="true" [maxDepth]="2" (onClick)="nodeClick($event)" (onDrill)="drill($event)" > <dxo-size height="440"></dxo-size> <dxo-title text="The Most Populated Cities by Continents" [placeholderSize]="80" ></dxo-title> <dxo-colorizer palette="soft"></dxo-colorizer> </dx-tree-map> <div id="drill-down-title"> <span *ngFor="let drillInfo of drillInfos; let isLast = last"> <span [ngClass]="{ link: !!drillInfo.node }" (click)="drillInfoClick(drillInfo.node)" >{{ drillInfo.text }}</span > {{ isLast ? "" : " > " }} </span> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxTreeMapModule } from 'devextreme-angular'; import { CitiesPopulation, Service } from './app.service'; interface DrillInfo { text: string; node?: any; } 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 { citiesPopulations: CitiesPopulation[]; drillInfos: DrillInfo[] = []; constructor(service: Service) { this.citiesPopulations = service.getCitiesPopulations(); } nodeClick(e) { e.node.drillDown(); } drill(e) { this.drillInfos = []; for (let node = e.node.getParent(); node; node = node.getParent()) { this.drillInfos.unshift({ text: node.label() || 'All Continents', node, }); } if (this.drillInfos.length) { this.drillInfos.push({ text: e.node.label(), }); } } drillInfoClick(node) { if (node) { node.drillDown(); } } } @NgModule({ imports: [ BrowserModule, DxTreeMapModule, ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #drill-down-title { position: absolute; top: 50px; height: 36px; width: 100%; text-align: center; } ::ng-deep .link { color: #337ab7; text-decoration: underline; cursor: pointer; }
import { Injectable } from '@angular/core'; export interface CitiesPopulation { name: string; items: any[]; } const citiesPopulations: CitiesPopulation[] = [{ name: 'Africa', items: [{ name: 'Nigeria', items: [{ name: 'Lagos', value: 21324000, }, { name: 'Kano', value: 3626068, }, { name: 'Ibadan', value: 3200000, }, { name: 'Abuja', value: 3000000, }, { name: 'Kaduna', value: 1652844, }, { name: 'Port Harcourt', value: 1320214, }, { name: 'Aba', value: 1300000, }, { name: 'Ogbomosho', value: 1200000, }, { name: 'Maiduguri', value: 1197497, }], }, { name: 'Egypt', items: [{ name: 'Cairo', value: 9278441, }, { name: 'Alexandria', value: 4546231, }, { name: 'Giza', value: 4239988, }, { name: 'Shubra El-Kheima', value: 3072951, }, { name: 'Port Said', value: 1607353, }, { name: 'Suez', value: 1347352, }], }, { name: 'Congo', items: [{ name: 'Kinshasa', value: 9735000, }, { name: 'Lubumbashi', value: 1786397, }, { name: 'Mbuji-Mayi', value: 1680991, }, { name: 'Kananga', value: 1061181, }, { name: 'Bukavu', value: 1012053, }, { name: 'Kisangani', value: 935977, }], }, { name: 'Morocco', items: [{ name: 'Casablanca', value: 3359818, }, { name: 'Fès', value: 1112072, }, { name: 'Tangier', value: 947952, }, { name: 'Marrakech', value: 928850, }, { name: 'Salé', value: 920403, }], }], }, { name: 'Asia', items: [{ name: 'China', items: [{ name: 'Shanghai', value: 24256800, }, { name: 'Beijing', value: 21516000, }, { name: 'Chongqing', value: 18384100, }, { name: 'Chengdu', value: 17677122, }, { name: 'Tianjin', value: 15200000, }, { name: 'Guangzhou', value: 13080500, }, { name: 'Shenzhen', value: 10630000, }], }, { name: 'Pakistan', items: [{ name: 'Karachi', value: 23500000, }, { name: 'Faisalabad', value: 6418745, }, { name: 'Lahore', value: 6318745, }, { name: 'Rawalpindi', value: 3363911, }, { name: 'Hyderabad', value: 3429471, }, { name: 'Multan', value: 2050000, }], }, { name: 'India', items: [{ name: 'Delhi', value: 16787941, }, { name: 'Mumbai', value: 12478447, }, { name: 'Bengaluru', value: 8425970, }, { name: 'Hyderabad', value: 7749334, }, { name: 'Chennai', value: 7088000, }, { name: 'Ahmedabad', value: 5577940, }], }, { name: 'Japan', items: [{ name: 'Tokyo', value: 9262046, }, { name: 'Yokohama', value: 3697894, }, { name: 'Osaka', value: 2668586, }, { name: 'Nagoya', value: 2283289, }, { name: 'Sapporo', value: 1918096, }], }], }, { name: 'Europe', items: [{ name: 'Turkey', items: [{ name: 'Istanbul', value: 14160467, }, { name: 'Ankara', value: 4470800, }, { name: 'İzmir', value: 3276815, }, { name: 'Bursa', value: 1957247, }, { name: 'Adana', value: 1717473, }], }, { name: 'Russia', items: [{ name: 'Moscow', value: 12197596, }, { name: 'Saint Petersburg', value: 5191690, }, { name: 'Novosibirsk', value: 1473754, }, { name: 'Yekaterinburg', value: 1428042, }], }, { name: 'United Kingdom', items: [{ name: 'London', value: 8538689, }, { name: 'Birmingham', value: 1101360, }, { name: 'Glasgow', value: 599650, }, { name: 'Liverpool', value: 473073, }], }, { name: 'Germany', items: [{ name: 'Berlin', value: 3517424, }, { name: 'Hamburg', value: 1686100, }, { name: 'Munich', value: 1185400, }, { name: 'Cologne', value: 1046680, }, { name: 'Frankfurt', value: 717624, }], }, { name: 'France', items: [{ name: 'Paris', value: 2240621, }, { name: 'Marseille', value: 852516, }, { name: 'Lyon', value: 500715, }, { name: 'Toulouse', value: 461190, }], }], }, { name: 'North America', items: [{ name: 'Mexico', items: [{ name: 'Mexico City', value: 8874724, }, { name: 'Ecatepec de Morelos', value: 1742023, }, { name: 'Puebla', value: 1508707, }, { name: 'Guadalajara', value: 1506359, }, { name: 'Juárez', value: 1409987, }, { name: 'Tijuana', value: 1399282, }, { name: 'León', value: 1281434, }], }, { name: 'United States', items: [{ name: 'New York City', value: 8550405, }, { name: 'Los Angeles', value: 3884307, }, { name: 'Chicago', value: 2722389, }, { name: 'Houston', value: 2296224, }, { name: 'Philadelphia', value: 1567442, }, { name: 'Phoenix', value: 1563025, }, { name: 'San Antonio', value: 1469845, }, { name: 'San Diego', value: 1394928, }], }, { name: 'Canada', items: [{ name: 'Toronto', value: 2808503, }, { name: 'Montreal', value: 1731245, }, { name: 'Calgary', value: 1096833, }, { name: 'Ottawa', value: 956710, }, { name: 'Edmonton', value: 895000, }, { name: 'Mississauga', value: 713443, }], }, { name: 'Cuba', items: [{ name: 'Havana', value: 2135498, }, { name: 'Santiago de Cuba', value: 425851, }, { name: 'Camagüey', value: 305845, }], }], }, { name: 'South America', items: [{ name: 'Brazil', items: [{ name: 'São Paulo', value: 11895893, }, { name: 'Rio de Janeiro', value: 6429923, }, { name: 'Salvador', value: 2902927, }, { name: 'Brasília', value: 2914830, }, { name: 'Fortaleza', value: 2591188, }, { name: 'Belo Horizonte', value: 2513451, }, { name: 'Manaus', value: 2094391, }], }, { name: 'Peru', items: [{ name: 'Lima', value: 8693387, }, { name: 'Callao', value: 1010315, }, { name: 'Arequipa', value: 869351, }, { name: 'Trujillo', value: 788236, }, { name: 'Chiclayo', value: 600440, }], }, { name: 'Colombia', items: [{ name: 'Bogotá', value: 7776845, }, { name: 'Medellín', value: 2441123, }, { name: 'Cali', value: 2400653, }, { name: 'Barranquilla', value: 1214253, }, { name: 'Cartagena', value: 959594, }], }, { name: 'Chile', items: [{ name: 'Santiago', value: 5507282, }, { name: 'Puente Alto', value: 610118, }, { name: 'Maipú', value: 468390, }], }, { name: 'Venezuela', items: [{ name: 'Caracas', value: 3289886, }, { name: 'Maracaibo', value: 1653211, }, { name: 'Barquisimeto', value: 1116182, }, { name: 'Valencia', value: 901900, }, { name: 'Ciudad Guayana', value: 877547, }], }], }]; @Injectable() export class Service { getCitiesPopulations() { return citiesPopulations; } }
// 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/ window.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@4.3.5/lib/typescript.js', '@angular/core': 'npm:@angular/core@12.2.16', '@angular/platform-browser': 'npm:@angular/platform-browser@12.2.16', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.16', '@angular/forms': 'npm:@angular/forms@12.2.16', '@angular/common': 'npm:@angular/common@12.2.16', '@angular/compiler': 'npm:@angular/compiler@12.2.16', 'tslib': 'npm:tslib@2.3.1/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@21.2.7/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@21.2.7/bundles/dx.all.js', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.5.14/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.47', 'devexpress-gantt': 'npm:devexpress-gantt@4.0.13', 'devextreme-angular': 'npm:devextreme-angular@21.2.7', '@devextreme/runtime': 'npm:@devextreme/runtime@2.3.14', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.11/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.11/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.11/dist/inferno-extras.min.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:@devextreme/*/package.json', 'npm:@devextreme/runtime@2.3.14/inferno/package.json', 'npm:@angular/*/package.json', 'npm:@angular/common@12.2.16/*/package.json', 'npm:rxjs@6.4.0/package.json', 'npm:rxjs@6.4.0/operators/package.json', 'npm:devextreme-angular@21.2.7/*/package.json', 'npm:devextreme-angular@21.2.7/ui/*/package.json', 'npm:devextreme-angular@21.2.7/package.json', 'npm:devexpress-diagram@2.1.47/package.json', 'npm:devexpress-gantt@4.0.13/package.json', ], }; System.config(window.config);
<!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/21.2.7/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.7/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@0.11.4/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>