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.
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-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://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
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};
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/21.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
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<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>