Demos
Nav(React)
TreeView
Nodes
Drag and Drop Between Trees

Drag and Drop Between Trees (React)

You can also drag and drop nodes between different TreeView controls. To do this, add an event handler for the dragOver event to configure the behavior.

Learn about Wijmo | TreeNode Drag and Drop Documentation | TreeView API Reference

This example uses React.

JavaScript
Angular
Vue
React
The demo is being dynamically compiled to support real-time code editing... For quicker access to features, switch to the "JavaScript" tab for a smoother experience! :)
app.jsx
index.html
app.css
data.jsx
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import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import ReactDOM from 'react-dom/client';
import React, { useState } from 'react';
import useEvent from 'react-use-event-hook';
import * as wjNav from '@mescius/wijmo.react.nav';
import './app.css';
import { data, anotherData } from './data';
function App() {
    const [allowDrag1, setAllowDrag1] = useState(true);
    const [allowDrag2, setAllowDrag2] = useState(true);
    const onDragOverBetweenTrees = useEvent((s, e) => {
        var t1 = e.dragSource.treeView;
        var t2 = e.dropTarget.treeView;
        //
        // prevent dragging within trees
        if (t1 == t2 && !document.getElementById("dragWithin").checked) {
            e.cancel = true;
        }
        //
        // allow dragging between trees
        if (t1 != t2 && document.getElementById("dragBetween").checked) {
            e.cancel = false;
        }
    });
    return (<div className="container-fluid">
      <label>
        <input id="dragWithin" type="checkbox" checked={allowDrag1} onClick={() => setAllowDrag1(!allowDrag1)}/>
        allow dragging within trees
      </label>
      <br />
      <label>
        <input id="dragBetween" type="checkbox" checked={allowDrag2} onClick={() => setAllowDrag2(!allowDrag2)}/>
        allow dragging between trees
      </label>
      <div className="row">
        <div className="col-xs-6">
          <wjNav.TreeView className="short-tree" itemsSource={data} displayMemberPath="header" childItemsPath="items" allowDragging={true} dragOver={onDragOverBetweenTrees}/>
        </div>
        <div className="col-xs-6">
          <wjNav.TreeView className="short-tree" itemsSource={anotherData} displayMemberPath="header" childItemsPath="items" allowDragging={true} dragOver={onDragOverBetweenTrees}/>
        </div>
      </div>
    </div>);
}
const container = document.getElementById('app');
if (container) {
    const root = ReactDOM.createRoot(container);
    root.render(<App />);
}
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjNav from '@mescius/wijmo.react.nav'; import './app.css'; import { data, anotherData } from './data'; function App() { const [allowDrag1, setAllowDrag1] = useState(true); const [allowDrag2, setAllowDrag2] = useState(true); const onDragOverBetweenTrees = useEvent((s, e) => { var t1 = e.dragSource.treeView; var t2 = e.dropTarget.treeView; // // prevent dragging within trees if (t1 == t2 && !document.getElementById("dragWithin").checked) { e.cancel = true; } // // allow dragging between trees if (t1 != t2 && document.getElementById("dragBetween").checked) { e.cancel = false; } }); return (<div className="container-fluid"> <label> <input id="dragWithin" type="checkbox" checked={allowDrag1} onClick={() => setAllowDrag1(!allowDrag1)}/> allow dragging within trees </label> <br /> <label> <input id="dragBetween" type="checkbox" checked={allowDrag2} onClick={() => setAllowDrag2(!allowDrag2)}/> allow dragging between trees </label> <div className="row"> <div className="col-xs-6"> <wjNav.TreeView className="short-tree" itemsSource={data} displayMemberPath="header" childItemsPath="items" allowDragging={true} dragOver={onDragOverBetweenTrees}/> </div> <div className="col-xs-6"> <wjNav.TreeView className="short-tree" itemsSource={anotherData} displayMemberPath="header" childItemsPath="items" allowDragging={true} dragOver={onDragOverBetweenTrees}/> </div> </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo TreeView Drag and Drop Between Trees</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.container-fluid .wj-treeview { display: block; height: 350px; font-size: 120%; margin-bottom: 8px; padding: 6px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); }
function getData() { return [ { header: 'root 1', items: [ { header: 'Item 1.1' }, { header: 'Item 1.2' }, { header: 'Item 1.3' } ] } ]; } function getAnotherData() { return [ { header: 'root 2', items: [ { header: 'Item 2.1' }, { header: 'Item 2.2' }, { header: 'Item 2.3' } ] } ]; } export const data = getData(); export const anotherData = getAnotherData();
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