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Bar Charts

Drill-Down Chart

Documentation

This demo shows a drill-down chart with two views. The start view displays a breakdown of population by continents. When you click a bar, the detailed view reveals most populated countries on the selected continent. Data for this view is provided by applying a filter to the original data.

Backend API
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<dx-chart id="chart" [class]="isFirstLevel ? 'pointer-on-bars' : ''" [dataSource]="dataSource" (onPointClick)="onPointClick($event)" title="The Most Populated Countries by Continents" [customizePoint]="customizePoint" > <dxi-series type="bar"></dxi-series> <dxo-legend [visible]="false"></dxo-legend> <dxi-value-axis [showZero]="false"></dxi-value-axis> </dx-chart> <dx-button class="button-container" text="Back" icon="chevronleft" [visible]="!isFirstLevel" (onClick)="onButtonClick()" > </dx-button>
import { NgModule, Component, ElementRef, enableProdMode, } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxChartModule, DxButtonModule } from 'devextreme-angular'; import { Service, DataItem } 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 { dataSource: DataItem[]; colors: string[]; service: Service; isFirstLevel: boolean; constructor(service: Service, element: ElementRef) { this.dataSource = service.filterData(''); this.colors = service.getColors(); this.service = service; this.isFirstLevel = true; } onButtonClick() { if (!this.isFirstLevel) { this.isFirstLevel = true; this.dataSource = this.service.filterData(''); } } onPointClick(e) { if (this.isFirstLevel) { this.isFirstLevel = false; this.dataSource = this.service.filterData(e.target.originalArgument); } } customizePoint = () => { let pointSettings: any; pointSettings = { color: this.colors[Number(this.isFirstLevel)], }; if (!this.isFirstLevel) { pointSettings.hoverStyle = { hatching: 'none', }; } return pointSettings; }; } @NgModule({ imports: [ BrowserModule, DxChartModule, DxButtonModule, ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
#chart { height: 440px; width: 100%; } ::ng-deep #chart.pointer-on-bars .dxc-series rect { cursor: pointer; } .button-container { text-align: center; height: 40px; position: absolute; top: 7px; left: 0; }
import { Injectable } from '@angular/core'; export class DataItem { arg: string; val: number; parentID: string; } const data: DataItem[] = [ { arg: 'Asia', val: 3007613498, parentID: '' }, { arg: 'North America', val: 493603615, parentID: '' }, { arg: 'Europe', val: 438575293, parentID: '' }, { arg: 'Africa', val: 381331438, parentID: '' }, { arg: 'South America', val: 331126555, parentID: '' }, { arg: 'Nigeria', val: 181562056, parentID: 'Africa' }, { arg: 'Egypt', val: 88487396, parentID: 'Africa' }, { arg: 'Congo', val: 77433744, parentID: 'Africa' }, { arg: 'Morocco', val: 33848242, parentID: 'Africa' }, { arg: 'China', val: 1380083000, parentID: 'Asia' }, { arg: 'India', val: 1306687000, parentID: 'Asia' }, { arg: 'Pakistan', val: 193885498, parentID: 'Asia' }, { arg: 'Japan', val: 126958000, parentID: 'Asia' }, { arg: 'Russia', val: 146804372, parentID: 'Europe' }, { arg: 'Germany', val: 82175684, parentID: 'Europe' }, { arg: 'Turkey', val: 79463663, parentID: 'Europe' }, { arg: 'France', val: 66736000, parentID: 'Europe' }, { arg: 'United Kingdom', val: 63395574, parentID: 'Europe' }, { arg: 'United States', val: 325310275, parentID: 'North America' }, { arg: 'Mexico', val: 121005815, parentID: 'North America' }, { arg: 'Canada', val: 36048521, parentID: 'North America' }, { arg: 'Cuba', val: 11239004, parentID: 'North America' }, { arg: 'Brazil', val: 205737996, parentID: 'South America' }, { arg: 'Colombia', val: 48400388, parentID: 'South America' }, { arg: 'Venezuela', val: 30761000, parentID: 'South America' }, { arg: 'Peru', val: 28220764, parentID: 'South America' }, { arg: 'Chile', val: 18006407, parentID: 'South America' }, ]; const colors: string[] = ['#6babac', '#e55253']; @Injectable() export class Service { filterData(name): DataItem[] { return data.filter((item) => item.parentID === name); } getColors(): string[] { return colors; } }
// 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@3.5.3/lib/typescript.js', '@angular/core': 'npm:@angular/core@12.2.13', '@angular/platform-browser': 'npm:@angular/platform-browser@12.2.13', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.13', '@angular/forms': 'npm:@angular/forms@12.2.13', '@angular/common/http': 'npm:@angular/common@12.2.13/bundles/common-http.umd.js', '@angular/common': 'npm:@angular/common@12.2.13', '@angular/compiler': 'npm:@angular/compiler@12.2.13', '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@21.2.3/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@21.2.3/bundles/dx.all.js', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.5.5/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.37', 'devexpress-gantt': 'npm:devexpress-gantt@3.1.24', 'devextreme-angular': 'npm:devextreme-angular@21.2.3', '@devextreme/vdom': 'npm:@devextreme/vdom@2.2.3', '@devextreme/runtime': 'npm:@devextreme/runtime@2.3.8', 'inferno': 'npm:inferno@7.4.10/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.10/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.10/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.10/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.10/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.10/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.10/dist/inferno-extras.min.js', }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts', }, 'devextreme': { defaultExtension: 'js', }, '@devextreme/vdom': { 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@2.3.8/inferno/package.json', 'npm:@angular/*/package.json', 'npm:@angular/common/*/package.json', 'npm:rxjs@6.4.0/package.json', 'npm:rxjs@6.4.0/operators/package.json', 'npm:devextreme-angular/*/package.json', 'npm:devextreme-angular@21.2.3/ui/*/package.json', 'npm:devextreme-angular@21.2.3/package.json', 'npm:devexpress-diagram@2.1.37/package.json', 'npm:devexpress-gantt@3.1.24/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/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/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@0.11.4/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>