[PyQt] Drag & Drop with QTreeWidget

[Baz Walter]

NARCISO, Rui wrote:
> Hi again
> 
> Your approach worked nicely but when I tried to enable sorting using:
> 
>          self.setSortingEnabled(True)
>          self.sortByColumn(0, QtCore.Qt.AscendingOrder)
> I get a segmentation fault.
> 
> If i disable the sortByColumn then it works.
> 
> How then to set the sorting using column 0 by default ?

actually, i now think my approach was too crude. the trouble with using 
rowsInserted is that it is called every time items are added or moved 
(or sorted).

what is really needed is a way to add special handling only for dropped 
items. unfortunately, there does not appear to be an obvious way to 
detect what items were dropped and where. so i think the only reliable 
way to get the behaviour you want is to reimplement qtreewidget's drop 
event handling (which is probably doable, but not easy).