Plain Data Structure
The TreeView's plain (one-dimensional) array contains items each of which references its parent item. Use either of the following properties to bind the component to plain data:
-
items[]
Assigns a local array as shown in this demo. -
dataSource
Assigns a DataSource object that allows you to perform data shaping operations and use a remote source.
Each object in the TreeView's plain data structure should include the following fields:
You can respectively use the keyExpr, parentIdExpr, and displayExpr properties to specify custom names for the above-mentioned fields. Node objects can also include developer-defined fields and properties from this help section: items[].
In this demo, nodes use the icon and expanded properties. These properties specify the icon and whether a node is collapsed or expanded. Some nodes also include the developer-defined price field.
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!
We appreciate your feedback.
We appreciate your feedback.
import React from 'react';
import TreeView from 'devextreme-react/tree-view';
import service from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.products = service.getProducts();
this.state = {
currentItem: Object.assign({}, this.products[0])
};
this.selectItem = this.selectItem.bind(this);
}
render() {
const { currentItem } = this.state;
return (
<div className="form">
<TreeView id="simple-treeview"
items={this.products}
dataStructure="plain"
displayExpr="name"
parentIdExpr="categoryId"
keyExpr="ID"
width={300}
onItemClick={this.selectItem} />
{currentItem.price &&
<div id="product-details">
<img src={currentItem.icon} />
<div className="name">{currentItem.name}</div>
<div className="price">{`$${currentItem.price}`}</div>
</div>
}
</div>
);
}
selectItem(e) {
this.setState({
currentItem: Object.assign({}, e.itemData)
});
}
}
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/21.1.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.6/css/dx.light.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>
#simple-treeview, #product-details {
display: inline-block;
}
#product-details {
vertical-align: top;
width: 400px;
height: 420px;
margin-left: 20px;
}
#product-details > img {
border: none;
height: 300px;
width: 400px;
}
#product-details > .name {
text-align: center;
font-size: 20px;
}
#product-details > .price {
text-align: center;
font-size: 24px;
}
.dark #product-details > div {
color: #f0f0f0;
}
.hidden {
visibility: hidden;
}
const products = [{
ID: '1',
name: 'Stores',
expanded: true
}, {
ID: '1_1',
categoryId: '1',
name: 'Super Mart of the West',
expanded: true
}, {
ID: '1_1_1',
categoryId: '1_1',
name: 'Video Players'
}, {
ID: '1_1_1_1',
categoryId: '1_1_1',
name: 'HD Video Player',
icon: '../../../../images/products/1.png',
price: 220
}, {
ID: '1_1_1_2',
categoryId: '1_1_1',
name: 'SuperHD Video Player',
icon: '../../../../images/products/2.png',
price: 270
}, {
ID: '1_1_2',
categoryId: '1_1',
name: 'Televisions',
expanded: true
}, {
ID: '1_1_2_1',
categoryId: '1_1_2',
name: 'SuperLCD 42',
icon: '../../../../images/products/7.png',
price: 1200
}, {
ID: '1_1_2_2',
categoryId: '1_1_2',
name: 'SuperLED 42',
icon: '../../../../images/products/5.png',
price: 1450
}, {
ID: '1_1_2_3',
categoryId: '1_1_2',
name: 'SuperLED 50',
icon: '../../../../images/products/4.png',
price: 1600
}, {
ID: '1_1_2_4',
categoryId: '1_1_2',
name: 'SuperLCD 55',
icon: '../../../../images/products/6.png',
price: 1750
}, {
ID: '1_1_2_5',
categoryId: '1_1_2',
name: 'SuperLCD 70',
icon: '../../../../images/products/9.png',
price: 4000
}, {
ID: '1_1_3',
categoryId: '1_1',
name: 'Monitors'
}, {
ID: '1_1_3_1',
categoryId: '1_1_3',
name: '19"',
}, {
ID: '1_1_3_1_1',
categoryId: '1_1_3_1',
name: 'DesktopLCD 19',
icon: '../../../../images/products/10.png',
price: 160
}, {
ID: '1_1_4',
categoryId: '1_1',
name: 'Projectors'
}, {
ID: '1_1_4_1',
categoryId: '1_1_4',
name: 'Projector Plus',
icon: '../../../../images/products/14.png',
price: 550
}, {
ID: '1_1_4_2',
categoryId: '1_1_4',
name: 'Projector PlusHD',
icon: '../../../../images/products/15.png',
price: 750
}
];
export default {
getProducts() {
return products;
}
};
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@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/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@21.1.6/cjs',
'devextreme-react': 'npm:devextreme-react@21.1.6',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.4.2/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.32/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@3.0.14/dist/dx-gantt.js',
'@devextreme/vdom': 'npm:@devextreme/vdom@1.2.2',
'inferno': 'npm:inferno@7.4.10/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.10/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.10/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.10/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.10/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.10/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.10/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'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'@devextreme/vdom': {
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",
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
};
System.config(window.config);