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Charts

SignalR Service

Documentation

This example demonstrates real-time data update in a financial chart bound to a SignalR server. Note that data used in this demo is for demonstration purposes only.

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<div ng-if="connectionStarted"> <dx-chart id="chart" [dataSource]="dataSource" title="Stock Price" [customizePoint]="customizePoint"> <dxi-series pane="Price" argumentField="date" type="candlestick"> <dxo-aggregation [enabled]="true" method="custom" [calculate]="calculateCandle"> </dxo-aggregation> </dxi-series> <dxi-series pane="Volume" name="Volume" argumentField="date" valueField="volume" color="red" type="bar"> <dxo-aggregation [enabled]="true" method="sum"> </dxo-aggregation> </dxi-series> <dxi-pane name="Price"></dxi-pane> <dxi-pane name="Volume" [height]="80"></dxi-pane> <dxo-tooltip [enabled]="true" [shared]="true" argumentFormat="shortDateShortTime" contentTemplate="tooltipTemplate" ></dxo-tooltip> <dxo-crosshair [enabled]="true" [horizontalLine]="{visible: false}" ></dxo-crosshair> <dxo-margin [right]="30"></dxo-margin> <dxo-scroll-bar [visible]="true"></dxo-scroll-bar> <dxo-legend [visible]="false"></dxo-legend> <dxi-value-axis [placeholderSize]="50"></dxi-value-axis> <dxo-zoom-and-pan argumentAxis="both"></dxo-zoom-and-pan> <dxo-argument-axis argumentType="datetime" [minVisualRangeLength]="{minutes: 10}" [visualRange]="{length: 'hour'}" ></dxo-argument-axis> <dxo-loading-indicator [enabled]="true"></dxo-loading-indicator> <div *dxTemplate="let pointInfo of 'tooltipTemplate'"> <div class='tooltip-template'> <div>{{pointInfo.argumentText}}</div> <div> <span>Open: </span> {{formatPrice(pointInfo.points, "openValue")}} </div> <div> <span>High: </span> {{formatPrice(pointInfo.points, "highValue")}} </div> <div> <span>Low: </span> {{formatPrice(pointInfo.points, "lowValue")}} </div> <div> <span>Close: </span> {{formatPrice(pointInfo.points, "closeValue")}} </div> <div> <span>Volume: </span> {{formatVolume(pointInfo.points)}} </div> </div> </div> </dx-chart> </div>
import { NgModule, Component, ViewChild, enableProdMode } from '@angular/core'; import { DecimalPipe, CurrencyPipe } from '@angular/common'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { HubConnectionBuilder } from '@aspnet/signalr'; import { DxChartModule, DxChartComponent } from 'devextreme-angular'; import CustomStore from 'devextreme/data/custom_store'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [DecimalPipe, CurrencyPipe] }) export class AppComponent { @ViewChild(DxChartComponent, { static: false }) component: DxChartComponent; dataSource: any; connectionStarted: boolean; constructor(private decimalPipe: DecimalPipe, private currencyPipe: CurrencyPipe) { this.connectionStarted = false; var hubConnection = new HubConnectionBuilder() .withUrl("https://js.devexpress.com/Demos/NetCore/stockTickDataHub") .build(); var store = new CustomStore({ load: () => hubConnection.invoke("getAllData"), key: "date" }); hubConnection .start() .then(() => { hubConnection.on("updateStockPrice", (data: any) => { store.push([{ type: "insert", key: data.date, data: data }]); }); this.dataSource = store; this.connectionStarted = true; }); } calculateCandle(e) { const prices = e.data.map(d => d.price); if (prices.length) { return { date: e.intervalStart, open: prices[0], high: Math.max.apply(null, prices), low: Math.min.apply(null, prices), close: prices[prices.length - 1] }; } } customizePoint = (arg: any) => { if(arg.seriesName === "Volume") { const point = this.component.instance.getAllSeries()[0].getPointsByArg(arg.argument)[0].data; if(point.close >= point.open) { return { color: "#1db2f5" }; } } } formatPrice = (points: any, field: any) => { const pricePoint = points.filter(point => point.seriesName !== "Volume")[0]; return this.currencyPipe.transform(pricePoint[field], "USD", "symbol", "1.0-0"); } formatVolume = (points: any) => { const volPoint = points.filter(point => point.seriesName === "Volume")[0]; return this.decimalPipe.transform(volPoint.value, "3.0-0"); } } @NgModule({ imports: [ BrowserModule, DxChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart { height: 440px; } ::ng-deep .tooltip-template span { font-weight: 500; }
// 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/ 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@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.4.5/lib/typescript.js', '@angular/core': 'npm:@angular/core@8.0.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@8.0.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@8.0.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@8.0.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@8.0.0/bundles/platform-browser-dynamic.umd.js', '@angular/router': 'npm:@angular/router@8.0.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@8.0.0/bundles/forms.umd.js', '@angular/common/http': 'npm:@angular/common@8.0.0/bundles/common-http.umd.js', '@aspnet/signalr': 'npm:@aspnet/signalr@1.0.0/dist/cjs/index.js', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', 'rxjs/operators': 'npm:rxjs@6.3.3/operators', 'devextreme': 'npm:devextreme@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', 'devextreme-angular': 'npm:devextreme-angular@19.2' }, 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/19.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/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>