Does RadTreeView support DragDrop between different RadPanes?

[Joe]

I have two RadPanes, in separate Prism regions, in my WPF MVVM application.
I added RadTreeViews in each RadPane.  I enabled the DragDrop on each of them.
When I test the DragDrop I see the "No" icon (red circle with a slash) and I am not able to drop the item.

Is there a known inability to DragDrop RadTreeViewItems between different RadPanes?

Do the data bound .NET objects have to be the same types?  The Telerik documentation is very thin on such details.
I am wondering if I have different object types in the backing lists does that matter?
Isn't each ultimately wrapped as a RadTreeViewItem?

The Telerik DragDrop example has the RadTreeViewItems created in line, in the XAML, and they only contain an image.
I need a more detailed example across RadPanes and using sorted CollectionViewSources.
The documentation does not go at all this deep.

Can someone help me?
Thanks, Joe

[Petar Mladenov]

Hello Joe,

The RadTreeViewItems are containers, actually a visual objects , representations of your data(the business objects). When moving a RadTreeViewItem from a source tree to a destination tree, the destination Item`s children collection type ( the collection in which you want to drop the dragged item) should be the same as the dragged item`s type. This requirement is mandatory.
The DragAndDrop operation between two bound RadTreeViews  in two different RadPanes should work "out of the box". If you need to perform custom DragAndDrop behavior , you can try the RadDragAndDropManager and its events.
Please let us know if you need further assistance on this.

Regards,
Petar Mladenov
the Telerik team

[Joe]

Okay, thank you Petar, I will try this.
The DragDrop demo simply has simply this:

<telerik:RadTreeViewItem Header="Junk E-mails" DefaultImageSrc="../Images/TreeView/Outlook/junk.png" />

where the TreeViewItem object type is nothing more than an empty TreeViewItem with a header and an image.
It is not a very good example - just a demo. 
I wish the demo showed MVVM with ObservableCollections of a class bound to TreeViews in different RadPanes.
I will change my solution and report back to you with the results.

Thank you, Joe

[Petar Mladenov]

Hi Joe,

I prepared a sample for you that demonstrates a DragAndDrop operations between two RadTreeViews located in different RadPanes. Could you please give it a try and let us know if it satisfies you ?

Regards,
Petar Mladenov
the Telerik team