We implemented the new RadTreeView DragDrop logic (using the DragDropManager) with the Q1 2013 SP1 release. However, we're still fine-tuning it and if you'd like to test it, you can do so using the latest internal build. Basically in order to work with the new DragDropManager logic implemented within the RadTreeView, you need to set the TreeViewSettings.DragDropExecutionMode attached property to New:
The official and final version of the updated DragDropManager logic will be available with the Q2 2013 release as you correctly noted. It will include auto-scrolling out-of-the-box. And if you'd like to test the auto-scrolling behavior you can do so in the sample I attached.
However, please note that even though you will still be able to use the old DragAndDropManager logic in the control, we will eventually remove it. This is why we haven't included any changes in it and it won't support auto-scrolling during drag out-of-the-box. And we strongly recommend updating your RadTreeView
implementation to use the new dragging logic at your earliest convenience after the Q2 2013 release is out. The DragDropManager
provides a better flexibility of the RadTreeView
dragging operations and you'll be able to easily customize them in case they don't completely work per your requirements.
the Telerik team