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React Diagram - Advanced Data Binding

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.

Backend API
import React from 'react'; import Diagram, { Nodes, AutoLayout, Edges, Toolbox, Group, } from 'devextreme-react/diagram'; import { ArrayStore } from 'devextreme-react/common/data'; import service from './data.ts'; const orgItemsDataSource = new ArrayStore({ key: 'id', data: service.getOrgItems(), }); const orgLinksDataSource = new ArrayStore({ key: 'id', data: service.getOrgLinks(), }); function itemTypeExpr(obj: { type: string | undefined; }, value: string) { if (value) { obj.type = (value === 'rectangle') ? undefined : 'group'; return null; } return obj.type === 'group' ? 'ellipse' : 'rectangle'; } function itemWidthExpr(obj: { width: number; type: string; }, value: number) { if (value) { obj.width = value; return null; } return obj.width || (obj.type === 'group' && 1.5) || 1; } function itemHeightExpr(obj: { height: number; type: string; }, value: number) { if (value) { obj.height = value; return null; } return obj.height || (obj.type === 'group' && 1) || 0.75; } function itemTextStyleExpr(obj: { level: string; }) { if (obj.level === 'senior') { return { 'font-weight': 'bold', 'text-decoration': 'underline' }; } return {}; } function itemStyleExpr(obj: { type: string; }) { const style: { stroke: string; fill?: string } = { stroke: '#444444' }; if (obj.type === 'group') { style.fill = '#f3f3f3'; } return style; } function linkStyleExpr() { return { stroke: '#444444' }; } function linkFromLineEndExpr() { return 'none'; } function linkToLineEndExpr() { return 'none'; } export default function App() { return ( <Diagram id="diagram"> <Nodes dataSource={orgItemsDataSource} typeExpr={itemTypeExpr} textExpr="name" widthExpr={itemWidthExpr} heightExpr={itemHeightExpr} textStyleExpr={itemTextStyleExpr} styleExpr={itemStyleExpr}> <AutoLayout type="tree" orientation="horizontal" /> </Nodes> <Edges dataSource={orgLinksDataSource} styleExpr={linkStyleExpr} fromLineEndExpr={linkFromLineEndExpr} toLineEndExpr={linkToLineEndExpr} /> <Toolbox> <Group category="general" title="General" /> </Toolbox> </Diagram> ); }
import React from 'react'; import Diagram, { Nodes, AutoLayout, Edges, Toolbox, Group, } from 'devextreme-react/diagram'; import { ArrayStore } from 'devextreme-react/common/data'; import service from './data.js'; const orgItemsDataSource = new ArrayStore({ key: 'id', data: service.getOrgItems(), }); const orgLinksDataSource = new ArrayStore({ key: 'id', data: service.getOrgLinks(), }); function itemTypeExpr(obj, value) { if (value) { obj.type = value === 'rectangle' ? undefined : 'group'; return null; } return obj.type === 'group' ? 'ellipse' : 'rectangle'; } function itemWidthExpr(obj, value) { if (value) { obj.width = value; return null; } return obj.width || (obj.type === 'group' && 1.5) || 1; } function itemHeightExpr(obj, value) { if (value) { obj.height = value; return null; } return obj.height || (obj.type === 'group' && 1) || 0.75; } function itemTextStyleExpr(obj) { if (obj.level === 'senior') { return { 'font-weight': 'bold', 'text-decoration': 'underline' }; } return {}; } function itemStyleExpr(obj) { const style = { stroke: '#444444' }; if (obj.type === 'group') { style.fill = '#f3f3f3'; } return style; } function linkStyleExpr() { return { stroke: '#444444' }; } function linkFromLineEndExpr() { return 'none'; } function linkToLineEndExpr() { return 'none'; } export default function App() { return ( <Diagram id="diagram"> <Nodes dataSource={orgItemsDataSource} typeExpr={itemTypeExpr} textExpr="name" widthExpr={itemWidthExpr} heightExpr={itemHeightExpr} textStyleExpr={itemTextStyleExpr} styleExpr={itemStyleExpr} > <AutoLayout type="tree" orientation="horizontal" /> </Nodes> <Edges dataSource={orgLinksDataSource} styleExpr={linkStyleExpr} fromLineEndExpr={linkFromLineEndExpr} toLineEndExpr={linkToLineEndExpr} /> <Toolbox> <Group category="general" title="General" /> </Toolbox> </Diagram> ); }
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );
const orgItems = [ { 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 = [ { 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', }, ]; export default { getOrgItems() { return orgItems; }, getOrgLinks() { return orgLinks; }, };
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));
const orgItems = [ { 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 = [ { 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', }, ]; export default { getOrgItems() { return orgItems; }, getOrgLinks() { return orgLinks; }, };
<!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" /> <link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" /> <link rel="stylesheet" type="text/css" href="./bundle.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> <script src="bundles/vendor/react.vendor.js"></script> <script src="./bundle.js"></script> </body> </html>
#diagram { height: 900px; }