[Qt-interest] prevent a drop in QTreeWidget

[Bo Thorsen]

Den 27-05-2011 10:03, Graham Labdon skrev:
> Hi
> Can someone advise me how to prevent a drop being accepted in certain circumstances in a QTreeWidget?
> I have derived a class from QTreeWidget and have reimplemented the DropEvent method.
> How do I get the information that tells me where the item is being dropped so I can tell whether or not the drop should be allowed?

I saw that you already got something working. But it's actually the 
wrong direction you are going in.

Don't touch the drop code on QTreeWidget. Instead, handle this in the 
model. You should read the entire section on using drag and drop with 
the model/view classes.

The method you need here is QAbstractItemModel::dropMimeData(...). 
Override that instead of the view.

Bo Thorsen,
Fionia Software.

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