Drag and Drop Between Trees

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

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjNav from '@mescius/wijmo.nav'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create the trees var firstTree = new wjNav.TreeView('#firstTree', { itemsSource: [ { header: 'root 1', items: [ { header: 'Item 1.1' }, { header: 'Item 1.2' }, { header: 'Item 1.3' } ] } ], displayMemberPath: 'header', childItemsPath: 'items', allowDragging: true, dragOver: dragOverBetweenTrees }); var secondTree = new wjNav.TreeView('#secondTree', { itemsSource: [ { header: 'root 2', items: [ { header: 'Item 2.1' }, { header: 'Item 2.2' }, { header: 'Item 2.3' } ] } ], displayMemberPath: 'header', childItemsPath: 'items', allowDragging: true, dragOver: dragOverBetweenTrees }); // // handle drag-drop within or between trees function dragOverBetweenTrees(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; } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS 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/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <label> <input id="dragWithin" type="checkbox" checked="checked"> allow dragging within trees </label> <br /> <label> <input id="dragBetween" type="checkbox" checked="checked"> allow dragging between trees </label> <div class="row"> <div class="col-xs-6"> <div id="firstTree" class="short-tree"></div> </div> <div class="col-xs-6"> <div id="secondTree" class="short-tree"></div> </div> </div> </div> </body> </html>
/* default trees on this sample */ .wj-treeview { height: 250px; font-size: 120%; margin-top: 8px; margin-bottom: 8px; padding: 3px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23); } body { margin-bottom: 24pt; }
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