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Charts

Client-Side Data Processing

Documentation
The DevExtreme HTML5 Widgets can get data from a remote storage and process it on the client. This demo shows the Chart widget whose data source loads all data from a remote JSON file in one query. Afterwards, different filters are applied to this data depending on a value of the drop-down menu under the chart.
weatherbase.com
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<div id="chart-demo"> <dx-chart title="Temperature in Barcelona: January 2012" [dataSource]="monthWeather" [customizePoint]="customizePoint" > <dxo-size [height]="420"></dxo-size> <dxi-series argumentField="day" valueField="t" type="bar" ></dxi-series> <dxo-legend [visible]="false"></dxo-legend> <dxo-export [enabled]="true"></dxo-export> <dxi-value-axis> <dxo-label [customizeText]="customizeText"></dxo-label> </dxi-value-axis> </dx-chart> <div class="action"> <dx-select-box id="choose-temperature" [dataSource]="temperature" [width]="70" [value]="6" (onValueChanged)="onValueChanged($event)" ></dx-select-box> <div class="label">Choose a temperature threshold, &deg;C: </div> </div> </div>
import { NgModule, Component, ViewChild, Inject, AfterViewInit, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { Http, HttpModule } from '@angular/http'; import { DxChartModule, DxChartComponent, DxSelectBoxModule } from 'devextreme-angular'; import DataSource from 'devextreme/data/data_source'; import CustomStore from 'devextreme/data/custom_store'; import query from 'devextreme/data/query'; import 'rxjs/add/operator/toPromise'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent implements AfterViewInit { @ViewChild(DxChartComponent) chart: DxChartComponent temperature: number[] = [6, 7, 8, 9, 10, 11, 12]; palette: string[] = ['#c3a2cc', '#b7b5e0', '#e48cba']; paletteIndex = 0; monthWeather: any = {}; constructor(@Inject(Http) private http: Http) {} ngAfterViewInit() { this.monthWeather = new DataSource({ store: new CustomStore({ load: () => { this.chart.instance.showLoadingIndicator(); return this.http.get('../../../../data/monthWeather.json') .toPromise() .then(response => response.json()) .catch(error => { throw 'Data Loading Error' }); }, loadMode: 'raw' }), filter: ['t', '>', '6'], paginate: false }); } customizePoint = () => { let color = this.palette[this.paletteIndex]; this.paletteIndex = this.paletteIndex === 2 ? 0 : this.paletteIndex + 1; return { color: color }; } customizeText(arg) { return arg.valueText + '&#176C' } onValueChanged(data) { let t = data.value; this.monthWeather.filter(['t', '>', t]); this.monthWeather.load(); } } @NgModule({ imports: [ BrowserModule, HttpModule, DxChartModule, DxSelectBoxModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #choose-temperature { float: right; } /deep/ .action { width: 320px; margin-top: 20px; } /deep/ .label { padding-top: 9px; }
// 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@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@17.1', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.1' }, 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/17.1.7/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.7/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.1.7/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@0.19.31/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>