SignalR Service

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, HttpTransportType } 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", { skipNegotiation: true, transport: HttpTransportType.WebSockets }) .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: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.1.0/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', '@aspnet/signalr': 'npm:@aspnet/signalr@1.0.0/dist/cjs/index.js', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.5', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.8/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.11', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.18', 'devextreme-angular': 'npm:devextreme-angular@20.2.5', 'preact': 'npm:preact@10.5.11/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.11/hooks/dist/hooks.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", "npm:@aspnet/*/package.json", ] });

<!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/20.2.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/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@0.10.2/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>