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@7.1.3/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common@7.1.3/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler@7.1.3/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser@7.1.3/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@7.1.3/bundles/platform-browser-dynamic.umd.js',
'@angular/router': 'npm:@angular/router@7.1.3/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms@7.1.3/bundles/forms.umd.js',
'@angular/common/http': 'npm:@angular/common@7.1.3/bundles/common-http.umd.js',
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs@6.3.3',
'rxjs/operators': 'npm:rxjs@6.3.3/operators',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.6/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devextreme': 'npm:devextreme@19.1',
'devextreme-angular': 'npm:devextreme-angular@19.1'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'rxjs': { main: 'index.js', defaultExtension: 'js' },
'rxjs/operators': { main: 'index.js', 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/19.1.3/css/dx.common.css" />
<link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.3/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@0.21.3/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>