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Diagram

Advanced Data Binding

Documentation

The Diagram component accepts functions as expression property values. It allows you to implement custom logic when you bind a diagram to a data source. In this demo, the nodes and edges collections are bound to a data source. Custom functions are used to get different shape types and font styles for items based on additional data source information.

The autoLayout property specifies an auto-layout algorithm type and orientation that the component uses to build diagrams.

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<dx-diagram #diagram id="diagram"> <dxo-nodes [dataSource]="orgItemsDataSource" keyExpr="ID" [typeExpr]="itemTypeExpr" textExpr="Name" [widthExpr]="itemWidthExpr" [heightExpr]="itemHeightExpr" [textStyleExpr]="itemTextStyleExpr" [styleExpr]="itemStyleExpr"> <dxo-auto-layout type="tree" orientation="horizontal"></dxo-auto-layout> </dxo-nodes> <dxo-edges [dataSource]="orgLinksDataSource" keyExpr="ID" fromExpr="From" toExpr="To" [styleExpr]="linkStyleExpr" [fromLineEndExpr]="linkFromLineEndExpr" [toLineEndExpr]="linkToLineEndExpr"></dxo-edges> <dxo-toolbox> <dxi-group category="general" title="General"></dxi-group> </dxo-toolbox> </dx-diagram>
import { NgModule, Component, ViewChild, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { HttpClient, HttpClientModule } from '@angular/common/http'; import { DxDiagramModule, DxDiagramComponent } from 'devextreme-angular'; import { Service } from './app.service'; import ArrayStore from 'devextreme/data/array_store' if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service], preserveWhitespaces: true }) export class AppComponent { orgItemsDataSource: ArrayStore; orgLinksDataSource: ArrayStore; constructor(service: Service) { this.orgItemsDataSource = new ArrayStore({ key: "ID", data: service.getOrgItems() }); this.orgLinksDataSource = new ArrayStore({ key: "ID", data: service.getOrgLinks() }); } itemTypeExpr(obj, value) { if(value) obj.Type = (value === "rectangle") ? undefined : "group"; else return obj.Type === "group" ? "ellipse" : "rectangle"; } itemWidthExpr(obj, value) { if(value) obj.Width = value; else return obj.Width || (obj.Type === "group" && 1.5) || 1; } itemHeightExpr(obj, value) { if(value) obj.Height = value; else return obj.Height || (obj.Type === "group" && 1) || 0.75; } itemTextStyleExpr(obj) { if(obj.Level === "senior") return { "font-weight": "bold", "text-decoration": "underline" }; return {}; } itemStyleExpr(obj) { let style = { "stroke": "#444444" }; if(obj.Type === "group") style["fill"] = "#f3f3f3"; return style; } linkStyleExpr(obj) { return { "stroke": "#444444" }; } linkFromLineEndExpr(obj) { return "none"; } linkToLineEndExpr(obj) { return "none"; } } @NgModule({ imports: [ BrowserModule, HttpClientModule, DxDiagramModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #diagram { height: 900px; }
import { Injectable } from '@angular/core'; export class OrgItem { ID: string; Name: string; Type?: string; Level?: string; } export class OrgLink { ID: string; From: string; To: string; } let orgItems: OrgItem[] = [ { "ID": "106", "Name": "Development", "Type": "group" }, { "ID": "107", "Name": "WinForms\nTeam", "Type": "group" }, { "ID": "108", "Name": "WPF\nTeam", "Type": "group" }, { "ID": "109", "Name": "Javascript\nTeam", "Type": "group" }, { "ID": "110", "Name": "ASP.NET\nTeam", "Type": "group" }, { "ID": "112", "Name": "Ana\nTrujillo", "Level": "senior" }, { "ID": "113", "Name": "Antonio\nMoreno" }, { "ID": "115", "Name": "Christina\nBerglund" }, { "ID": "116", "Name": "Hanna\nMoos" }, { "ID": "119", "Name": "Laurence\nLebihan" }, { "ID": "120", "Name": "Elizabeth\nLincoln", "Level": "senior" }, { "ID": "122", "Name": "Patricio\nSimpson", "Level": "senior" }, { "ID": "123", "Name": "Francisco\nChang" } ]; let orgLinks: OrgLink[] = [ { "ID": "124", "From": "106", "To": "108", }, { "ID": "125", "From": "106", "To": "109", }, { "ID": "126", "From": "106", "To": "107", }, { "ID": "127", "From": "106", "To": "110", }, { "ID": "129", "From": "110", "To": "112", }, { "ID": "130", "From": "110", "To": "113", }, { "ID": "132", "From": "107", "To": "115", }, { "ID": "133", "From": "107", "To": "116", }, { "ID": "136", "From": "108", "To": "119", }, { "ID": "137", "From": "108", "To": "120", }, { "ID": "139", "From": "109", "To": "122", }, { "ID": "140", "From": "109", "To": "123", } ]; @Injectable() export class Service { getOrgItems() { return orgItems; } getOrgLinks() { return orgLinks; } }
// 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@1.27.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@21.1.4/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@21.1.4/bundles/dx.all.js', 'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.1.4/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.19', 'devexpress-gantt': 'npm:devexpress-gantt@2.1.42', 'devextreme-angular': 'npm:devextreme-angular@21.1.4', '@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/21.1.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx-diagram.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>