API - Select a Point
Documentation
This demo shows how easily you can access a necessary chart series and select a specific point in it using the API.
Feel free to share demo-related thoughts here.
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<dx-chart
id="chart"
[dataSource]="catBreedsData"
[rotated]="true"
title="Most Popular US Cat Breeds"
(onPointClick)="pointClick($event)"
(onDone)="done($event)"
>
<dxi-series valueField="count" name="breeds" color="#a3d6d2">
<dxo-selection-style color="#ec2e7a">
<dxo-hatching direction="none"></dxo-hatching>
</dxo-selection-style>
</dxi-series>
<dxo-common-series-settings argumentField="breed" type="bar">
</dxo-common-series-settings>
<dxo-legend [visible]="false"></dxo-legend>
<dxo-export [enabled]="true"></dxo-export>
</dx-chart>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxChartModule } from 'devextreme-angular';
import { Service, CatBreed } 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 {
catBreedsData: CatBreed[];
constructor(service: Service) {
this.catBreedsData = service.getCatBreedsData();
}
pointClick(e: any) {
const point = e.target;
if (point.isSelected()) {
point.clearSelection();
} else {
point.select();
}
}
done(e: any) {
e.component.getSeriesByPos(0).getPointsByArg('Siamese')[0].select();
}
}
@NgModule({
imports: [
BrowserModule,
DxChartModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart {
height: 440px;
}
import { Injectable } from '@angular/core';
export class CatBreed {
breed: string;
count: number;
}
const catBreeds: CatBreed[] = [{
breed: 'Domestic Shorthair',
count: 62942,
}, {
breed: 'American Shorthair',
count: 38287,
}, {
breed: 'Domestic Medium Hair',
count: 15652,
}, {
breed: 'Domestic Long Hair',
count: 13670,
}, {
breed: 'Siamese',
count: 13377,
}, {
breed: 'Maine Coon',
count: 11254,
}, {
breed: 'Persian',
count: 7198,
}, {
breed: 'Russian Blue',
count: 3569,
}, {
breed: 'Himalayan',
count: 3755,
}, {
breed: 'Ragdoll',
count: 3426,
}, {
breed: 'Bengal',
count: 2966,
}, {
breed: 'Manx',
count: 2391,
}, {
breed: 'British Shorthair',
count: 2329,
}, {
breed: 'Norwegian Forest Cat',
count: 1817,
}, {
breed: 'Bombay',
count: 1486,
}];
@Injectable()
export class Service {
getCatBreedsData(): CatBreed[] {
return catBreeds;
}
}
// 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',
},
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'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
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'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
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'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/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
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// Prettier
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},
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main: './index.js',
defaultExtension: 'js',
},
'rxjs': {
defaultExtension: 'js',
},
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defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
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'npm:rxjs@7.5.3/package.json',
'npm:rxjs@7.5.3/operators/package.json',
'npm:devextreme-angular@22.2.6/*/package.json',
'npm:devextreme-angular@22.2.6/ui/*/package.json',
'npm:devextreme-angular@22.2.6/package.json',
'npm:devexpress-diagram@2.1.72/package.json',
'npm:devexpress-gantt@4.1.43/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/22.2.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.13.0/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.13/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>