Real-Time Updates

import { NgModule, Component, enableProdMode, ChangeDetectionStrategy } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxDataGridModule, DxSliderModule } from 'devextreme-angular'; import DataSource from 'devextreme/data/data_source'; import ArrayStore from 'devextreme/data/array_store'; import { Product, Order, Service } from './app.service'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service], changeDetection: ChangeDetectionStrategy.OnPush }) export class AppComponent { productsDataSource: DataSource; orders: ArrayStore; updatesPerSecond: number = 100; constructor(service: Service) { this.productsDataSource = new DataSource({ store: service.getProducts(), reshapeOnPush: true }); this.orders = service.getOrders(); setInterval(() => { if(service.getOrderCount() > 500000) { return; } for(var i = 0; i < this.updatesPerSecond / 20; i++) { service.addOrder(); } }, 50); } getDetailGridDataSource(product: Product) { return new DataSource({ store: this.orders, reshapeOnPush: true, filter: ["ProductID", "=", product.ProductID] }); } getAmount(order: Order) { return order.UnitPrice * order.Quantity; } } @NgModule({ imports: [ BrowserModule, DxDataGridModule, DxSliderModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);

::ng-deep .options { padding: 20px; margin-top: 20px; background-color: rgba(191, 191, 191, 0.15); } ::ng-deep .caption { font-weight: 500; font-size: 18px; } ::ng-deep .option { margin-top: 10px; } ::ng-deep .option > span { position: relative; top: 2px; margin-right: 10px; } ::ng-deep .option > .dx-widget { width: 500px; display: inline-block; vertical-align: middle; }

import { Injectable } from '@angular/core'; import ArrayStore from 'devextreme/data/array_store'; export class Product { ProductID: number; ProductName: string; UnitPrice: number; Quantity: number; Amount: number; OrderCount: number; } export class Order { OrderID: number; ShipCity: string; ProductID: number; UnitPrice: number; OrderDate: Date; Quantity: number; } const cities = ["Los Angeles","Denver","Bentonville","Atlanta","Reno","Beaver","Malibu","Phoenix","San Diego","Little Rock","Pasadena","Boise","San Jose","Chatsworth","San Fernando","South Pasadena","San Fernando Valley","La Canada","St. Louis"]; let products: Product[] = []; for(var i = 1; i <= 100; i++) { products.push({ ProductID: i, ProductName: "Product " + i, UnitPrice: Math.floor(Math.random() * 1000) + 1, Quantity: 0, Amount: 0, OrderCount: 0 }); } let productsStore: ArrayStore = new ArrayStore({ data: products, key: "ProductID" }); let orders = []; let ordersStore = new ArrayStore({ key: "OrderID", data: orders }); @Injectable() export class Service { getProducts() { return productsStore; } getOrders() { return ordersStore; } getOrderCount() { return orders.length; } addOrder() { let product = products[Math.round(Math.random() * 99)]; let order: Order = { OrderID: orders.length ? orders[orders.length - 1].OrderID + 1 : 20001, ShipCity: cities[Math.round(Math.random() * (cities.length - 1))], ProductID: product.ProductID, UnitPrice: product.UnitPrice, OrderDate: new Date(), Quantity: Math.round(Math.random() * 20) + 1 }; ordersStore.push([{ type: "insert", data: order }]); productsStore.push([{ type: "update", key: order.ProductID, data: { OrderCount: product.OrderCount + 1, Quantity: product.Quantity + order.Quantity, Amount: product.Amount + order.UnitPrice * order.Quantity } }]); } }

// 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" }, '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@2.3.0/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@21.1.5/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@21.1.5/bundles/dx.all.js', 'jszip': 'npm:jszip@3.7.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.3.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.25', 'devexpress-gantt': 'npm:devexpress-gantt@3.0.4', 'devextreme-angular': 'npm:devextreme-angular@21.1.5', '@devextreme/vdom': 'npm:@devextreme/vdom@1.2.2', 'inferno': 'npm:inferno@7.4.8/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.8/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.8/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.8/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.8/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.8/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.8/dist/inferno-extras.min.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, '@devextreme/vdom': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@devextreme/*/package.json", "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", ] }; 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/21.1.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.5/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@0.10.3/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>