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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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import React from 'react'; import Diagram, { Nodes, AutoLayout, Edges, Toolbox, Group } from 'devextreme-react/diagram'; import ArrayStore from 'devextreme/data/array_store'; import service from './data.js'; class App extends React.Component { constructor(props) { super(props); this.orgItemsDataSource = new ArrayStore({ key: 'this', data: service.getOrgItems() }); this.orgLinksDataSource = new ArrayStore({ key: 'this', data: service.getOrgLinks() }); } render() { return ( <Diagram id="diagram"> <Nodes dataSource={this.orgItemsDataSource} typeExpr={this.itemTypeExpr} textExpr="name" widthExpr={this.itemWidthExpr} heightExpr={this.itemHeightExpr} textStyleExpr={this.itemTextStyleExpr} styleExpr={this.itemStyleExpr}> <AutoLayout type="tree" orientation="horizontal" /> </Nodes> <Edges dataSource={this.orgLinksDataSource} styleExpr={this.linkStyleExpr} fromLineEndExpr={this.linkFromLineEndExpr} toLineEndExpr={this.linkToLineEndExpr} /> <Toolbox> <Group category="general" title="General" /> </Toolbox> </Diagram> ); } 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() { return { 'stroke': '#444444' }; } linkFromLineEndExpr() { return 'none'; } linkToLineEndExpr() { return 'none'; } } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app') );
<!DOCTYPE html> <html> <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.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="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import('./index.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
#diagram { height: 900px; }
var 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' } ]; var 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; } };
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, defaultExtension: 'js', map: { 'react': 'npm:react@16/umd/react.development.js', 'react-dom': 'npm:react-dom@16/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme-react': 'npm:devextreme-react@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', 'whatwg-fetch': 'npm:whatwg-fetch@2.0.4/fetch.js', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });