Plain Data Structure
Documentation
The TreeView widget can display both hierarchical and plain data. In this demo, the TreeView data source is defined using a plain object. Notice that an image can be specified within an item of the data source. The default item template contains a specific field that allows displaying images without a custom item template.
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import React from 'react';
import { TreeView } from 'devextreme-react';
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/19.1.3/css/dx.common.css" />
<link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.3/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;
}
};
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@19.1',
'devextreme-react': 'npm:devextreme-react@19.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.6/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
// 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
}
});