Process the tree node operations using context menu in React Treeview component
30 Jan 202324 minutes to read
You can integrate the context menu with ‘TreeView’ component in order to perform the TreeView related operations like add, remove and renaming the node.
The following sample demonstrates the above cases which are used to manipulate TreeView operations in the ‘select ‘ event of context menu.
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { enableRipple } from '@syncfusion/ej2-base';
enableRipple(true);
import { TreeViewComponent, ContextMenuComponent } from '@syncfusion/ej2-react-navigations';
function App() {
let menuObj;
let treeObj;
let hierarchicalData = [
{ id: '01', name: 'Local Disk (C:)', expanded: true, hasAttribute: { class: 'remove rename' },
subChild: [
{
id: '01-01', name: 'Program Files',
subChild: [
{ id: '01-01-01', name: 'Windows NT' },
{ id: '01-01-02', name: 'Windows Mail' },
{ id: '01-01-03', name: 'Windows Photo Viewer' },
]
},
{
id: '01-02', name: 'Users', expanded: true,
subChild: [
{ id: '01-02-01', name: 'Smith' },
{ id: '01-02-02', name: 'Public' },
{ id: '01-02-03', name: 'Admin' },
]
},
{
id: '01-03', name: 'Windows',
subChild: [
{ id: '01-03-01', name: 'Boot' },
{ id: '01-03-02', name: 'FileManager' },
{ id: '01-03-03', name: 'System32' },
]
},
]
},
{
id: '02', name: 'Local Disk (D:)', hasAttribute: { class: 'rename' },
subChild: [
{
id: '02-01', name: 'Personals',
subChild: [
{ id: '02-01-01', name: 'My photo.png' },
{ id: '02-01-02', name: 'Rental document.docx' },
{ id: '02-01-03', name: 'Pay slip.pdf' },
]
},
{
id: '02-02', name: 'Projects',
subChild: [
{ id: '02-02-01', name: 'ASP Application' },
{ id: '02-02-02', name: 'TypeScript Application' },
{ id: '02-02-03', name: 'React Application' },
]
},
{
id: '02-03', name: 'Office',
subChild: [
{ id: '02-03-01', name: 'Work details.docx' },
{ id: '02-03-02', name: 'Weekly report.docx' },
{ id: '02-03-03', name: 'Wish list.csv' },
]
},
]
},
{
id: '03', name: 'Local Disk (E:)', icon: 'folder', hasAttribute: { class: 'remove' },
subChild: [
{
id: '03-01', name: 'Pictures',
subChild: [
{ id: '03-01-01', name: 'Wind.jpg' },
{ id: '03-01-02', name: 'Stone.jpg' },
{ id: '03-01-03', name: 'Home.jpg' },
]
},
{
id: '03-02', name: 'Documents',
subChild: [
{ id: '03-02-01', name: 'Environment Pollution.docx' },
{ id: '03-02-02', name: 'Global Warming.ppt' },
{ id: '03-02-03', name: 'Social Network.pdf' },
]
},
{
id: '03-03', name: 'Study Materials',
subChild: [
{ id: '03-03-01', name: 'UI-Guide.pdf' },
{ id: '03-03-02', name: 'Tutorials.zip' },
{ id: '03-03-03', name: 'TypeScript.7z' },
]
},
]
}
];
// Mapping TreeView fields property with data source properties
let fields = { dataSource: hierarchicalData, id: 'id', text: 'name', child: 'subChild', htmlAttributes: 'hasAttribute' };
function nodeclicked(args) {
if (args.event.which === 3) {
treeObj.selectedNodes = [args.node.getAttribute('data-uid')];
}
}
//Render the context menu with target as Treeview
let menuItems = [
{ text: 'Add New Item' },
{ text: 'Rename Item' },
{ text: 'Remove Item' }
];
let index = 1;
function menuclick(args) {
let targetNodeId = treeObj.selectedNodes[0];
if (args.item.text == "Add New Item") {
let nodeId = "tree_" + index;
let item = { id: nodeId, name: "New Folder" };
treeObj.addNodes([item], targetNodeId, null);
index++;
hierarchicalData.push(item);
treeObj.beginEdit(nodeId);
}
else if (args.item.text == "Remove Item") {
treeObj.removeNodes([targetNodeId]);
}
else if (args.item.text == "Rename Item") {
treeObj.beginEdit(targetNodeId);
}
}
function beforeopen(args) {
let targetNodeId = treeObj.selectedNodes[0];
let targetNode = document.querySelector('[data-uid="' + targetNodeId + '"]');
if (targetNode.classList.contains('remove')) {
menuObj.enableItems(['Remove Item'], false);
}
else {
menuObj.enableItems(['Remove Item'], true);
}
if (targetNode.classList.contains('rename')) {
menuObj.enableItems(['Rename Item'], false);
}
else {
menuObj.enableItems(['Rename Item'], true);
}
}
return (<div className='control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
<div id='tree'> {/* Render TreeView */}
<TreeViewComponent fields={fields} ref={(treeview) => { treeObj = treeview; }} nodeClicked={nodeclicked.bind(this)}/>
<ContextMenuComponent id="contentmenutree" target='#tree' items={menuItems} beforeOpen={beforeopen.bind(this)} select={menuclick.bind(this)} ref={(contextmenu) => { menuObj = contextmenu; }}/>
</div>
</div>
</div>
</div>);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));import * as React from 'react';
import * as ReactDOM from 'react-dom';
import {enableRipple} from '@syncfusion/ej2-base';
enableRipple(true);
import {TreeViewComponent, NodeClickEventArgs, ContextMenuComponent,MenuItemModel, MenuEventArgs, BeforeOpenCloseMenuEventArgs} from '@syncfusion/ej2-react-navigations';
function App() {
let menuObj: ContextMenuComponent;
let treeObj: TreeViewComponent;
let hierarchicalData: Object[] = [
{ id: '01', name: 'Local Disk (C:)', expanded: true, hasAttribute:{class:'remove rename'},
subChild: [
{
id: '01-01', name: 'Program Files',
subChild: [
{ id: '01-01-01', name: 'Windows NT' },
{ id: '01-01-02', name: 'Windows Mail' },
{ id: '01-01-03', name: 'Windows Photo Viewer' },
]
},
{
id: '01-02', name: 'Users', expanded: true,
subChild: [
{ id: '01-02-01', name: 'Smith' },
{ id: '01-02-02', name: 'Public' },
{ id: '01-02-03', name: 'Admin' },
]
},
{
id: '01-03', name: 'Windows',
subChild: [
{ id: '01-03-01', name: 'Boot' },
{ id: '01-03-02', name: 'FileManager' },
{ id: '01-03-03', name: 'System32' },
]
},
]
},
{
id: '02', name: 'Local Disk (D:)', hasAttribute:{class:'rename'},
subChild: [
{
id: '02-01', name: 'Personals',
subChild: [
{ id: '02-01-01', name: 'My photo.png' },
{ id: '02-01-02', name: 'Rental document.docx' },
{ id: '02-01-03', name: 'Pay slip.pdf' },
]
},
{
id: '02-02', name: 'Projects',
subChild: [
{ id: '02-02-01', name: 'ASP Application' },
{ id: '02-02-02', name: 'TypeScript Application' },
{ id: '02-02-03', name: 'React Application' },
]
},
{
id: '02-03', name: 'Office',
subChild: [
{ id: '02-03-01', name: 'Work details.docx' },
{ id: '02-03-02', name: 'Weekly report.docx' },
{ id: '02-03-03', name: 'Wish list.csv' },
]
},
]
},
{
id: '03', name: 'Local Disk (E:)', icon: 'folder', hasAttribute:{class:'remove'},
subChild: [
{
id: '03-01', name: 'Pictures',
subChild: [
{ id: '03-01-01', name: 'Wind.jpg' },
{ id: '03-01-02', name: 'Stone.jpg' },
{ id: '03-01-03', name: 'Home.jpg' },
]
},
{
id: '03-02', name: 'Documents',
subChild: [
{ id: '03-02-01', name: 'Environment Pollution.docx' },
{ id: '03-02-02', name: 'Global Warming.ppt' },
{ id: '03-02-03', name: 'Social Network.pdf' },
]
},
{
id: '03-03', name: 'Study Materials',
subChild: [
{ id: '03-03-01', name: 'UI-Guide.pdf' },
{ id: '03-03-02', name: 'Tutorials.zip' },
{ id: '03-03-03', name: 'TypeScript.7z' },
]
},
]
}
];
// Mapping TreeView fields property with data source properties
let fields: object = { dataSource: hierarchicalData, id: 'id', text: 'name', child: 'subChild', htmlAttributes: 'hasAttribute' };
function nodeclicked(args: NodeClickEventArgs) {
if (args.event.which === 3) {
treeObj.selectedNodes = [args.node.getAttribute('data-uid')];
}
}
//Render the context menu with target as Treeview
let menuItems: MenuItemModel[] = [
{ text: 'Add New Item' },
{ text: 'Rename Item' },
{ text: 'Remove Item' }
];
let index: number = 1;
function menuclick(args: MenuEventArgs) {
let targetNodeId: string = treeObj.selectedNodes[0];
if (args.item.text == "Add New Item") {
let nodeId: string = "tree_" + index;
let item: { [key: string]: Object } = { id: nodeId, name: "New Folder" };
treeObj.addNodes([item], targetNodeId, null);
index++;
hierarchicalData.push(item);
treeObj.beginEdit(nodeId);
}
else if (args.item.text == "Remove Item") {
treeObj.removeNodes([targetNodeId]);
}
else if (args.item.text == "Rename Item") {
treeObj.beginEdit(targetNodeId);
}
}
function beforeopen(args: BeforeOpenCloseMenuEventArgs) {
let targetNodeId: string = treeObj.selectedNodes[0];
let targetNode: Element = document.querySelector('[data-uid="' + targetNodeId + '"]');
if (targetNode.classList.contains('remove')) {
menuObj.enableItems(['Remove Item'], false);
}
else {
menuObj.enableItems(['Remove Item'], true);
}
if (targetNode.classList.contains('rename')) {
menuObj.enableItems(['Rename Item'], false);
}
else {
menuObj.enableItems(['Rename Item'], true);
}
}
return (
<div className = 'control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
<div id = 'tree'> {/* Render TreeView */}
<TreeViewComponent fields={fields} ref={(treeview) => { treeObj = treeview as TreeViewComponent; }} nodeClicked={nodeclicked.bind(this)} />
<ContextMenuComponent id="contentmenutree" target='#tree' items={menuItems} beforeOpen={beforeopen.bind(this)} select={menuclick.bind(this)} ref={(contextmenu) => { menuObj = contextmenu as ContextMenuComponent; }}/>
</div>
</div>
</div>
</div>
)
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));