Angular Diagram - Node and Edge Arrays

This demo shows the Diagram component's capability to load an external tree or a graph structure from two data sources: an array of shapes and an array of shape connectors. The connector is specified by the shape's ID attributes. The Diagram transforms information from the data sources into a tree layout view.

Backend API

<dx-diagram #diagram id="diagram"> <dxo-diagram-nodes [dataSource]="flowNodesDataSource" textExpr="text" typeExpr="type" > <dxo-diagram-auto-layout type="layered"></dxo-diagram-auto-layout> </dxo-diagram-nodes> <dxo-diagram-edges [dataSource]="flowEdgesDataSource" fromExpr="fromId" toExpr="toId" textExpr="text" ></dxo-diagram-edges> <dxo-diagram-toolbox> <dxi-diagram-group category="general" title="General"></dxi-diagram-group> </dxo-diagram-toolbox> </dx-diagram>

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { provideHttpClient, withFetch } from '@angular/common/http'; import { DxDiagramModule } from 'devextreme-angular'; import { ArrayStore } from 'devextreme-angular/common/data'; import { Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: './app.component.html', styleUrls: ['./app.component.css'], providers: [Service], preserveWhitespaces: true, imports: [ DxDiagramModule, ], }) export class AppComponent { flowNodesDataSource: ArrayStore; flowEdgesDataSource: ArrayStore; constructor(service: Service) { this.flowNodesDataSource = new ArrayStore({ key: 'id', data: service.getFlowNodes(), }); this.flowEdgesDataSource = new ArrayStore({ key: 'id', data: service.getFlowEdges(), }); } } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), provideHttpClient(withFetch()), ], });

::ng-deep #diagram { height: 725px; }

import { Injectable } from '@angular/core'; export class FlowNode { id: number; text: string; type: string; } export class FlowEdge { id: number; fromId: number; toId: number; text: string; } const flowNodes: FlowNode[] = [ { id: 107, text: 'A new ticket', type: 'terminator', }, { id: 108, text: 'Analyze the issue', type: 'process', }, { id: 118, text: 'Do we have all information to work with?', type: 'diamond', }, { id: 120, text: 'Answered', type: 'terminator', }, { id: 121, text: 'Request additional information or clarify the scenario', type: 'rectangle', }, { id: 125, text: 'Prepare an example in Code Central', type: 'rectangle', }, { id: 127, text: 'Update the documentation', type: 'rectangle', }, { id: 131, text: 'Process the ticket', type: 'rectangle', }, { id: 133, text: 'Work with the R&D team', type: 'rectangle', }, ]; const flowEdges: FlowEdge[] = [ { fromId: 107, id: 116, text: null, toId: 108, }, { fromId: 108, id: 117, text: null, toId: 118, }, { fromId: 118, id: 122, text: 'No', toId: 121, }, { fromId: 121, id: 123, text: null, toId: 108, }, { fromId: 131, id: 124, text: null, toId: 120, }, { fromId: 120, id: 126, text: '', toId: 125, }, { fromId: 120, id: 130, text: '', toId: 127, }, { fromId: 118, id: 132, text: 'Yes', toId: 131, }, { fromId: 131, id: 134, text: 'Need developer assistance?', toId: 133, }, { fromId: 133, id: 135, text: null, toId: 120, }, ]; @Injectable() export class Service { getFlowNodes() { return flowNodes; } getFlowEdges() { return flowEdges; } }

<!DOCTYPE html> <html lang="en"> <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=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx-diagram.min.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script> <script src="./bundle.js" type="module"></script> </body> </html>