DragDropManager for WPF TreeViews and ListViews

Now comes withEditableTreeNode! (see it in action in the demo)

With the Qnomad Drag-and-Drop Manager for WPF, you can add animated drag-and-drop to your WPF applications in three easy steps.

1. Create the DragDropManager then add the TreeViews/ListViews along with drop handlers for each operation you want to support.

   var dragMgr = new DragDropManager();dragMgr.AddControl<Category>( categoriesTreeView );dragMgr.AddControl<Category, Item>( itemsListView );dragMgr.AddHandler<Category>( categoriesTreeView, dragMgr_ProcessMove );dragMgr.AddHandler<Item, Category>( categoriesTreeView, dragMgr_ProcessLink );

2. Implement your drop handlers, which will resemble these.

   void dragMgr_ProcessMove( object sender, HierarchicalPlacementArgs<Category> moveArgs ){   moveArgs.Apply();}void dragMgr_ProcessLink( object sender, LinkArgs<Item, Category> e ){   e.TargetLoc.Items.Add( e.ItemToLink );}

3. Implement the applicable interfaces on your item-level view-models or, if you don't use the MVVM pattern, whatever is in theItemsSource collections

   • IMoveable<T> is for items that can be moved (dragged) from one location to another. You can add logic to theCanMove methods that disallows otherwise valid move operations per your requirements.
   • ITreeNode<T> is for items appearing in a TreeView, to indicate theSubItems and Parent properties.

Demonstration Application

Download the demo to see what sets the Qnomad Drag-and-Drop Manager for WPF apart. The demo consists of a TreeView that holds categories, and a ListView populated with the selected category's items. These two controls together have a total of three types of drag-drop operations setup on them.

1. Move a category within the TreeView
2. Move an item within the ListView
3. Link an item with another category

Manager Features

The Qnomad Drag-and-Drop Manager for WPF is a flexible and powerful solution for drag-and-drop within and between TreeViews and ListViews, and includes these features:

• Supports drag-drop operations among any number of TreeViews and/or ListViews.
• Shows drag adorner while dragging.
• Explicitly supports two drop types: Move for moving an item, andLink for linking one (see demo).
• User controls where, relative to the item under the drag cursor, the item will be dropped: above, below, or (for TreeViews) within.
• Ability to receive drops from external sources, e.g. files from Windows Explorer, in the same manner as internal ones.
• Spiffy animations for grabs, drops, and cancelled operations.
• Auto-expand item if hovering over it during drag operation.
• Auto-scroll TreeView or ListView if near top or bottom edge.
• Works on the standard TreeView and ListView controls. No third-party TreeView or ListView control is required.
• The Model-View-ViewModel design pattern is fully supported. Any implementation of MVVM can be used, although the pattern isn't necessary in order to use the Drag-and-Drop Manager.

Click the "Download" button at the top of this page to get the demo.

Purchase DragDropManager for WPF by clicking here.