import React from 'react';
import TreeView from 'devextreme-react/tree-view';
import ContextMenu from 'devextreme-react/context-menu';
import List from 'devextreme-react/list';
import service from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.contextMenuRef = React.createRef();
this.treeViewRef = React.createRef();
this.state = {
products: service.getProducts(),
menuItems: service.getMenuItems(),
logItems: [],
selectedTreeItem: undefined
};
this.treeViewItemContextMenu = this.treeViewItemContextMenu.bind(this);
this.contextMenuItemClick = this.contextMenuItemClick.bind(this);
}
render() {
return (
<div className="form">
<TreeView id="treeview"
ref={this.treeViewRef}
items={this.state.products}
width={300}
height={450}
onItemContextMenu={this.treeViewItemContextMenu} />
<div className="log-container">
<div><i className="icon dx-icon-clock"></i> Operations log:</div>
<List
id="log"
width={400}
height={300}
showScrollbar="always"
items={this.state.logItems} />
</div>
<ContextMenu
ref={this.contextMenuRef}
dataSource={this.state.menuItems}
target="#treeview .dx-treeview-item"
onItemClick={this.contextMenuItemClick} />
</div>
);
}
get treeView() {
return this.treeViewRef.current.instance;
}
get contextMenu() {
return this.contextMenuRef.current.instance;
}
treeViewItemContextMenu(e) {
this.setState({
selectedTreeItem: e.itemData,
});
const isProduct = e.itemData.price !== undefined;
this.contextMenu.option('items[0].visible', !isProduct);
this.contextMenu.option('items[1].visible', !isProduct);
this.contextMenu.option('items[2].visible', isProduct);
this.contextMenu.option('items[3].visible', isProduct);
this.contextMenu.option('items[0].disabled', e.node.expanded);
this.contextMenu.option('items[1].disabled', !e.node.expanded);
}
contextMenuItemClick(e) {
let logEntry = '';
switch(e.itemData.id) {
case 'expand': {
logEntry = `The '${this.state.selectedTreeItem.text}' group was expanded`;
this.treeView.expandItem(this.state.selectedTreeItem.id);
break;
}
case 'collapse': {
logEntry = `The '${this.state.selectedTreeItem.text}' group was collapsed`;
this.treeView.collapseItem(this.state.selectedTreeItem.id);
break;
}
case 'details': {
logEntry = `Details about '${this.state.selectedTreeItem.text}' were displayed`;
break;
}
case 'copy': {
logEntry = `Information about '${this.state.selectedTreeItem.text}' was copied`;
break;
}
}
const logItems = this.state.logItems.concat([logEntry]);
this.setState({
logItems: logItems
});
}
}
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/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/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>
.form {
display: flex;
}
.form>div,
#treeview {
display: inline-block;
vertical-align: top;
}
.log-container {
padding: 20px;
margin-left: 20px;
font-size: 115%;
font-weight: bold;
background-color: rgba(191, 191, 191, 0.15);
height: 100%;
}
.log-container .dx-icon-clock {
position: relative;
top: 1px;
}
#log {
margin-top: 10px;
}
#log .dx-empty-message {
padding-left: 0px;
}
.dx-list-item-content {
padding-left: 0;
}
const menuItems = [
{ id: 'expand', text: 'Expand category' },
{ id: 'collapse', text: 'Collapse category' },
{ id: 'details', text: 'Show product details' },
{ id: 'copy', text: 'Copy product info' }
];
const products = [{
id: '1',
text: 'Stores',
expanded: true,
items: [{
id: '1_1',
text: 'Super Mart of the West',
expanded: true,
items: [{
id: '1_1_1',
text: 'Video Players',
items: [{
id: '1_1_1_1',
text: 'HD Video Player',
price: 220,
image: '../../../../images/products/1.png'
}, {
id: '1_1_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 270
}]
}, {
id: '1_1_2',
text: 'Televisions',
expanded: true,
items: [{
id: '1_1_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1200
}, {
id: '1_1_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1450
}, {
id: '1_1_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1600
}, {
id: '1_1_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1350
}, {
id: '1_1_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000
}]
}, {
id: '1_1_3',
text: 'Monitors',
expanded: true,
items: [{
id: '1_1_3_1',
text: '19"',
expanded: true,
items: [{
id: '1_1_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160
}]
}, {
id: '1_1_3_2',
text: '21"',
items: [{
id: '1_1_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170
}, {
id: '1_1_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 175
}]
}]
}, {
id: '1_1_4',
text: 'Projectors',
items: [{
id: '1_1_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550
}, {
id: '1_1_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750
}]
}]
}, {
id: '1_2',
text: 'Braeburn',
items: [{
id: '1_2_1',
text: 'Video Players',
items: [{
id: '1_2_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 240
}, {
id: '1_2_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 300
}]
}, {
id: '1_2_2',
text: 'Televisions',
items: [{
id: '1_2_2_1',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1800
}, {
id: '1_2_2_2',
text: 'SuperPlasma 65',
image: '../../../../images/products/8.png',
price: 3500
}]
}, {
id: '1_2_3',
text: 'Monitors',
items: [{
id: '1_2_3_1',
text: '19"',
items: [{
id: '1_2_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 170
}]
}, {
id: '1_2_3_2',
text: '21"',
items: [{
id: '1_2_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 180
}, {
id: '1_2_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 190
}]
}]
}]
}, {
id: '1_3',
text: 'E-Mart',
items: [{
id: '1_3_1',
text: 'Video Players',
items: [{
id: '1_3_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 220
}, {
id: '1_3_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 275
}]
}, {
id: '1_3_3',
text: 'Monitors',
items: [{
id: '1_3_3_1',
text: '19"',
items: [{
id: '1_3_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 165
}]
}, {
id: '1_3_3_2',
text: '21"',
items: [{
id: '1_3_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 175
}]
}]
}]
}, {
id: '1_4',
text: 'Walters',
items: [{
id: '1_4_1',
text: 'Video Players',
items: [{
id: '1_4_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 210
}, {
id: '1_4_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 250
}]
}, {
id: '1_4_2',
text: 'Televisions',
items: [{
id: '1_4_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1100
}, {
id: '1_4_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1400
}, {
id: '1_4_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1500
}, {
id: '1_4_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1300
}, {
id: '1_4_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000
}, {
id: '1_4_2_6',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1700
}]
}, {
id: '1_4_3',
text: 'Monitors',
items: [{
id: '1_4_3_1',
text: '19"',
items: [{
id: '1_4_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160
}]
}, {
id: '1_4_3_2',
text: '21"',
items: [{
id: '1_4_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170
}, {
id: '1_4_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 180
}]
}]
}, {
id: '1_4_4',
text: 'Projectors',
items: [{
id: '1_4_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550
}, {
id: '1_4_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750
}]
}]
}]
}];
export default {
getProducts() {
return products;
},
getMenuItems() {
return menuItems;
}
};
System.config({
transpiler: 'plugin-babel',
meta: {
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/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@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.4',
'devextreme-react': 'npm:devextreme-react@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.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-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});