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Diagram

Advanced Data Binding

Note that the Diagram widget is in the community technology preview (CTP) development stage.

The Diagram widget accepts functions as expression property values. The widget 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 option specifies an auto-layout algorithm type and orientation that the widget 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 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: "this", data: service.getOrgItems() }); this.orgLinksDataSource = new ArrayStore({ key: "this", 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://github.com/DevExpress/devextreme-angular/blob/master/README.md 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', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', '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/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/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@0.6.25/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>