[PyKDE] Problem with setModel on QTreeView

[Phil Thompson]

On Sunday 22 January 2006 12:53 am, Andreas Pakulat wrote:
> Hi,
>
> using setModel() on a QTreeView results in the TreeView "loosing" it's
> model, if I don't save a separate reference to it. Following code
> doesn't work:
>
> tree = QtGui.QTreeView()
> tree.setModel(SomeTreeModel(tree))
> tree.show()
>
> The tree is empty, however first creating a variable pointing to the
> model and then using setModel() with that variable works.
>
> I wouldn't bother writing this if this would be the case for other
> Views too, but at least QTableView doesn't have this limitation. I don't
> need a separate reference to the model.
>
> It also shouldn't be necessary to hold a separate reference to the
> model, as QTreeView should have one internal reference to it.

The extra reference is by virtue of tree being the parent of the model, rather 
than the call to setModel(). What is SomeTreeModel() derived from?

As ever, a small complete example would help.

Phil