Drag and Drop in a QTreeWidget subclass

[kishore]

I have two types of items (say A & B) in a tree widget. A button will separate these items.
When I drop items of type A (which are present at the top of the Button), on to items of type B (which are present below the button), the type A items will be added to type B items as child items.

Once all the type A items are dropped on to type B items, the Button will be moved to the top of the list.

My requirement is when I drop type A items again on to the Button, they should be moved to the top of the list.

But the problem here is, the drop event function is not getting called when I drop the items on to Button.

This works fine on Windows. But on Mac this is not working!!

Any ideas on how to implement this?

[wysota]

Drop event method of which widget is not called? The button or the tree widget?

[kishore]

Button as well as the tree widget also!