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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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: 'id',
data: service.getOrgItems(),
});
this.orgLinksDataSource = new ArrayStore({
key: 'id',
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';
}
return null;
}
itemWidthExpr(obj, value) {
if (value) {
obj.width = value;
} else {
return obj.width || (obj.type === 'group' && 1.5) || 1;
}
return null;
}
itemHeightExpr(obj, value) {
if (value) {
obj.height = value;
} else {
return obj.height || (obj.type === 'group' && 1) || 0.75;
}
return null;
}
itemTextStyleExpr(obj) {
if (obj.level === 'senior') {
return { 'font-weight': 'bold', 'text-decoration': 'underline' };
}
return {};
}
itemStyleExpr(obj) {
const 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/22.2.6/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.2.6/css/dx-diagram.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@2.6.12/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;
}
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;
},
};
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.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@22.2.6/cjs',
'devextreme-react': 'npm:devextreme-react@22.2.6',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.20/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.72/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.43/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/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/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);