[kontact] [Bug 327865] Endless fetch loop with favorite collections

[Christian Mollekopf]

https://bugs.kde.org/show_bug.cgi?id=327865

--- Comment #9 from Christian Mollekopf <mollekopf at kolabsys.com> ---
The reason why everything gets dereferenced to zero, is because the
FavortiteCollectionsModel sits on top of the EntityCollectionOrderProxyModel
just like the other SelectionProxyModels that are part of StorageModel.

So unless we have a workaround (like delaying the decrease of the refcount),
the layoutChanged signal is our real problem.

The layoutChanged signal get's emitted because the QSortFilterProxyModel
baseclass of EntityCollectionOrderProxyModel detects that some indexes need to
be resorted in it's sourceDataChanged slot, and that results in a layoutChanged
signal. The dataChanged signal causing it in this case stems from
Akonadi::EntityTreeModelPrivate::changeFetchState.
However, the underlying models shouldn't change the order just because a new
folder was selected in the view.

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