React Tree View - ContextMenu

To display a DevExtreme ContextMenu when users right-click TreeView nodes, specify the nodes as the menu's target elements. To do this, set the menu's target property to a CSS selector. Since all TreeView nodes use the dx-treeview-item class, you can use this class' selector, as shown in this demo.

You can control each command's enabled state depending on the node where users invoked the context menu. Implement the TreeView's onItemContextMenu function; in it, set the disabled property to true for required commands.

TS JS

Backend API

import React, { useCallback, useRef, useState } from 'react'; import TreeView, { type TreeViewTypes } from 'devextreme-react/tree-view'; import ContextMenu, { type ContextMenuTypes } from 'devextreme-react/context-menu'; import List from 'devextreme-react/list'; import service from './data.ts'; const products = service.getProducts(); const menuItems = service.getMenuItems(); const App = () => { const contextMenuRef = useRef(null); const treeViewRef = useRef(null); const [logItems, setLogItems] = useState([]); const [selectedTreeItem, setSelectedTreeItem] = useState(undefined); const treeViewItemContextMenu = useCallback(( e: TreeViewTypes.ItemContextMenuEvent & { itemData: { price?: any; }; }, ) => { setSelectedTreeItem(e.itemData); const isProduct = e.itemData.price !== undefined; contextMenuRef.current.instance().option('items[0].visible', !isProduct); contextMenuRef.current.instance().option('items[1].visible', !isProduct); contextMenuRef.current.instance().option('items[2].visible', isProduct); contextMenuRef.current.instance().option('items[3].visible', isProduct); contextMenuRef.current.instance().option('items[0].disabled', e.node.expanded); contextMenuRef.current.instance().option('items[1].disabled', !e.node.expanded); }, []); const contextMenuItemClick = useCallback(( e: ContextMenuTypes.ItemClickEvent & { itemData: { id?: any; }; }, ) => { let logEntry = ''; switch (e.itemData.id) { case 'expand': { logEntry = `The '${selectedTreeItem.text}' group was expanded`; treeViewRef.current.instance().expandItem(selectedTreeItem.id); break; } case 'collapse': { logEntry = `The '${selectedTreeItem.text}' group was collapsed`; treeViewRef.current.instance().collapseItem(selectedTreeItem.id); break; } case 'details': { logEntry = `Details about '${selectedTreeItem.text}' were displayed`; break; } case 'copy': { logEntry = `Information about '${selectedTreeItem.text}' was copied`; break; } default: break; } const updatedLogItems = [...logItems, logEntry]; setLogItems(updatedLogItems); }, [logItems, selectedTreeItem, setLogItems]); return ( <div className="form"> <TreeView id="treeview" ref={treeViewRef} items={products} width={300} height={450} onItemContextMenu={treeViewItemContextMenu} /> <div className="log-container"> <div> <i className="icon dx-icon-clock"></i> <span> Operations log:</span> </div> <List id="log" width={400} height={300} showScrollbar="always" items={logItems} /> </div> <ContextMenu ref={contextMenuRef} dataSource={menuItems} target="#treeview .dx-treeview-item" onItemClick={contextMenuItemClick} /> </div> ); }; export default App;

import React, { useCallback, useRef, useState } 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'; const products = service.getProducts(); const menuItems = service.getMenuItems(); const App = () => { const contextMenuRef = useRef(null); const treeViewRef = useRef(null); const [logItems, setLogItems] = useState([]); const [selectedTreeItem, setSelectedTreeItem] = useState(undefined); const treeViewItemContextMenu = useCallback((e) => { setSelectedTreeItem(e.itemData); const isProduct = e.itemData.price !== undefined; contextMenuRef.current.instance().option('items[0].visible', !isProduct); contextMenuRef.current.instance().option('items[1].visible', !isProduct); contextMenuRef.current.instance().option('items[2].visible', isProduct); contextMenuRef.current.instance().option('items[3].visible', isProduct); contextMenuRef.current.instance().option('items[0].disabled', e.node.expanded); contextMenuRef.current.instance().option('items[1].disabled', !e.node.expanded); }, []); const contextMenuItemClick = useCallback( (e) => { let logEntry = ''; switch (e.itemData.id) { case 'expand': { logEntry = `The '${selectedTreeItem.text}' group was expanded`; treeViewRef.current.instance().expandItem(selectedTreeItem.id); break; } case 'collapse': { logEntry = `The '${selectedTreeItem.text}' group was collapsed`; treeViewRef.current.instance().collapseItem(selectedTreeItem.id); break; } case 'details': { logEntry = `Details about '${selectedTreeItem.text}' were displayed`; break; } case 'copy': { logEntry = `Information about '${selectedTreeItem.text}' was copied`; break; } default: break; } const updatedLogItems = [...logItems, logEntry]; setLogItems(updatedLogItems); }, [logItems, selectedTreeItem, setLogItems], ); return ( <div className="form"> <TreeView id="treeview" ref={treeViewRef} items={products} width={300} height={450} onItemContextMenu={treeViewItemContextMenu} /> <div className="log-container"> <div> <i className="icon dx-icon-clock"></i> <span> Operations log:</span> </div> <List id="log" width={400} height={300} showScrollbar="always" items={logItems} /> </div> <ContextMenu ref={contextMenuRef} dataSource={menuItems} target="#treeview .dx-treeview-item" onItemClick={contextMenuItemClick} /> </div> ); }; export default App;

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));

<!DOCTYPE html> <html lang="en"> <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=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.7/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.tsx"); </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-weight: 600; background-color: rgba(191, 191, 191, 0.15); } .log-container > div:first-child { display: flex; align-items: center; margin-bottom: 10px; } .log-container .dx-icon-clock { font-size: var(--dx-font-size-icon); } #log .dx-empty-message { padding-left: 0; } .dx-list-item-content { padding-left: 0; }