[PyQt] General question about Proxy Model

[Maurizio Berti]

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 <john at sturtz.org> 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    PyQt at riverbankcomputing.com
> 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20190517/2dc930d9/attachment.html>