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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.

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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: 0px; }
import { Injectable } from '@angular/core'; export class DataItem { arg: string; val: number; parentID: string; } let 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" } ]; let colors: string[] = ["#6babac", "#e55253"]; @Injectable() export class Service { filterData(name): DataItem[] { return data.filter(function (item) { return 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://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@5.1.2/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@5.1.2/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@5.1.2/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@5.1.2/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@5.1.2/bundles/platform-browser-dynamic.umd.js', '@angular/router': 'npm:@angular/router@5.1.2/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@5.1.2/bundles/forms.umd.js', '@angular/common/http': 'npm:@angular/common@5.1.2/bundles/common-http.umd.js', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@5.3.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme': 'npm:devextreme@18.1', 'devextreme-angular': 'npm:devextreme-angular@18.1' }, 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/18.1.6/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/18.1.6/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@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/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>