Re: General question about Proxy Model

Since you're implementing your own model, implementing removeRows() in the
source model should be enough, but you have to ensure that its
implementation responds as expected: removeRows has to return a bool, and
the parent *must* be checked, expecially if you have a tree structure. Also
ensure that all basic model functions (index, parent, rowCount, columnCount
and data) are correctly implemented.

I'd suggest you to give us a minimal example anyway, you might even find
out what is wrong in your case.

Maurizio

Il giorno mar 14 mag 2019 alle ore 21:38 John F Sturtz <[email protected]> ha
scritto:

> Hi again.
>
> I'm the one who started the *QTreeView + sort + delete = crash* thread on
> May 8th.  In response to assistance from Kyle and Florian, I've
> re-implemented to use a QAbstractItemModel with associated
> QSortFilterProxyModel.
>
> On the whole, that seems to be working pretty well, but there's one thing
> (well, at least one) I haven't been clear on despite poring over what
> documentation I can find.  I can post the test code again if it will help,
> but I think this is more of a general question:
>
> If I have both a source model and also a proxy, and I'm modifying the view
> in a way that changes the structure (deleting a row, in the current case
> I'm working on), should I be overriding removeRows() for *both* the
> source model and the proxy, and calling beginRemoveRows()/endRemoveRows()
> in both cases?
>
> I guess that seems to make sense to me, and my initial testing suggests
> it's so, as it seems to work (whereas if I *don't* do that, I either get
> a crash, or a message something like QSortFilterProxyModel: inconsistent
> changes reported by source model).
>
> Same for inserting rows?  Just checking to see if I'm thinking right here.
>
> Thanks!
>
> /John
> _______________________________________________
> PyQt mailing list    [email protected]
> https://www.riverbankcomputing.com/mailman/listinfo/pyqt
>


-- 
È difficile avere una convinzione precisa quando si parla delle ragioni del
cuore. - "Sostiene Pereira", Antonio Tabucchi
http://www.jidesk.net

_______________________________________________
PyQt mailing list    [email protected]
https://www.riverbankcomputing.com/mailman/listinfo/pyqt