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Advanced Data Binding
Documentation
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.
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.
Thank you!
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We appreciate your feedback.
<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/
System.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@2.0.3/tslib.js',
'rxjs': 'npm:rxjs@6.3.3',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8',
'devextreme-angular': 'npm:devextreme-angular@20.2.4',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.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'
}
},
packageConfigPaths: [
"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",
]
});
<!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/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/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@0.10.2/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>