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,MenuItemModel, MenuEventArgs, BeforeOpenCloseMenuEventArgs} from '@syncfusion/ej2-react-navigations';
export default class App extends React.Component<{}, {}> {
public menuObj: ContextMenuComponent;
public treeObj: TreeViewComponent;
public 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
private fields: object = { dataSource: this.hierarchicalData, id: 'id', text: 'name', child: 'subChild', htmlAttributes: 'hasAttribute' };
//Render the context menu with target as Treeview
public menuItems: MenuItemModel[] = [
{ text: 'Add New Item' },
{ text: 'Rename Item' },
{ text: 'Remove Item' }
];
public index: number = 1;
public menuclick(args: MenuEventArgs) {
let targetNodeId: string = this.treeObj.selectedNodes[0];
if (args.item.text == "Add New Item") {
let nodeId: string = "tree_" + this.index;
let item: { [key: string]: Object } = { id: nodeId, name: "New Folder" };
this.treeObj.addNodes([item], targetNodeId, null);
this.index++;
this.hierarchicalData.push(item);
this.treeObj.beginEdit(nodeId);
}
else if (args.item.text == "Remove Item") {
this.treeObj.removeNodes([targetNodeId]);
}
else if (args.item.text == "Rename Item") {
this.treeObj.beginEdit(targetNodeId);
}
}
public beforeopen(args: BeforeOpenCloseMenuEventArgs) {
let targetNodeId: string = this.treeObj.selectedNodes[0];
let targetNode: Element = document.querySelector('[data-uid="' + targetNodeId + '"]');
if (targetNode.classList.contains('remove')) {
this.menuObj.enableItems(['Remove Item'], false);
}
else {
this.menuObj.enableItems(['Remove Item'], true);
}
if (targetNode.classList.contains('rename')) {
this.menuObj.enableItems(['Rename Item'], false);
}
else {
this.menuObj.enableItems(['Rename Item'], true);
}
}
render() {
return (
<div className = 'control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
<div id = 'tree'> {/* Render TreeView */}
<TreeViewComponent fields={this.fields} ref={(treeview) => { this.treeObj = treeview as TreeViewComponent; }} />
<ContextMenuComponent id="contentmenutree" target='#tree' items={this.menuItems} beforeOpen={this.beforeopen.bind(this)} select={this.menuclick.bind(this)} ref={(contextmenu) => { this.menuObj = contextmenu as ContextMenuComponent; }}/>
</div>
</div>
</div>
</div>
)
}
}
ReactDOM.render(<App />, document.getElementById('sample'));#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
#treeparent {
display: block;
max-width: 350px;
max-height: 350px;
margin: auto;
overflow: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}
#contentmenutree {
padding: 0;
font-size: inherit;
}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';
export default class App extends React.Component {
constructor() {
super(...arguments);
this.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
this.fields = { dataSource: this.hierarchicalData, id: 'id', text: 'name', child: 'subChild', htmlAttributes: 'hasAttribute' };
//Render the context menu with target as Treeview
this.menuItems = [
{ text: 'Add New Item' },
{ text: 'Rename Item' },
{ text: 'Remove Item' }
];
this.index = 1;
}
menuclick(args) {
let targetNodeId = this.treeObj.selectedNodes[0];
if (args.item.text == "Add New Item") {
let nodeId = "tree_" + this.index;
let item = { id: nodeId, name: "New Folder" };
this.treeObj.addNodes([item], targetNodeId, null);
this.index++;
this.hierarchicalData.push(item);
this.treeObj.beginEdit(nodeId);
}
else if (args.item.text == "Remove Item") {
this.treeObj.removeNodes([targetNodeId]);
}
else if (args.item.text == "Rename Item") {
this.treeObj.beginEdit(targetNodeId);
}
}
beforeopen(args) {
let targetNodeId = this.treeObj.selectedNodes[0];
let targetNode = document.querySelector('[data-uid="' + targetNodeId + '"]');
if (targetNode.classList.contains('remove')) {
this.menuObj.enableItems(['Remove Item'], false);
}
else {
this.menuObj.enableItems(['Remove Item'], true);
}
if (targetNode.classList.contains('rename')) {
this.menuObj.enableItems(['Rename Item'], false);
}
else {
this.menuObj.enableItems(['Rename Item'], true);
}
}
render() {
return (<div className='control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
<div id='tree'>
<TreeViewComponent fields={this.fields} ref={(treeview) => { this.treeObj = treeview; }}/>
<ContextMenuComponent id="contentmenutree" target='#tree' items={this.menuItems} beforeOpen={this.beforeopen.bind(this)} select={this.menuclick.bind(this)} ref={(contextmenu) => { this.menuObj = contextmenu; }}/>
</div>
</div>
</div>
</div>);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));