[PyQt] QTreeView DragDropMode (Copy vs. Move)

[hosscomp]

hosscomp wrote
> 
> I am looking at the documentation for QAbstractItemView Class.  I have
> created a tree view and I would like it to accept drops from a different
> view, but also be able to move items within itself.  None of the
> DragDropMode settings seem to allow that. If I set it to InternalMove it
> acts the way I want it to internally but doesn't accept drops from the
> other view. If I set it to DragDrop it only copies the items.  Do I need
> to override some method (like dropMimeData) to have it remove the the
> source item after copying it?  Or what documentation do I need to look at
> to figure this out?
> 
> ----------------------------------------------------------------------
> 
I am still trying to figure this one out. How can I tell if an item being
dropped is from this model instance's tree or from another one?  That is, an
internal drag or an external one.

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