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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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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 ArrayStore from 'devextreme/data/array_store';
import { 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],
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) {
const style: Record<string, string> = { 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;
}
const 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',
},
];
const 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@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'@angular/core': 'npm:@angular/core@12.2.16',
'@angular/platform-browser': 'npm:@angular/platform-browser@12.2.16',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.16',
'@angular/forms': 'npm:@angular/forms@12.2.16',
'@angular/common': 'npm:@angular/common@12.2.16',
'@angular/compiler': 'npm:@angular/compiler@12.2.16',
'tslib': 'npm:tslib@2.3.1/tslib.js',
'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js',
'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js',
'rrule': 'npm:rrule@2.6.4/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@22.1.6/cjs',
'devextreme/bundles/dx.all': 'npm:devextreme@22.1.6/bundles/dx.all.js',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.18/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.65',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.33',
'devextreme-angular': 'npm:devextreme-angular@22.1.6',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'inferno': 'npm:inferno@7.4.4/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.11/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.11/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.11/dist/inferno-extras.min.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.7.1/standalone.js',
'prettier/parser-html': 'npm:prettier@2.7.1/parser-html.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',
},
'rxjs': {
defaultExtension: 'js',
},
'rxjs/operators': {
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
'npm:@angular/*/package.json',
'npm:@angular/common@12.2.16/*/package.json',
'npm:rxjs@7.5.3/package.json',
'npm:rxjs@7.5.3/operators/package.json',
'npm:devextreme-angular@22.1.6/*/package.json',
'npm:devextreme-angular@22.1.6/ui/*/package.json',
'npm:devextreme-angular@22.1.6/package.json',
'npm:devexpress-diagram@2.1.65/package.json',
'npm:devexpress-gantt@4.1.33/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/22.1.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.6/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.6/css/dx-diagram.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.11.8/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.13/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>