[PySide] problem with custom sorting in QSortFilterProxyModel

[Frank Rueter | OHUfx]

HI all,

just for future reference (if people have the same problem), the 
solution was to simply call self.invalidate() right before calling 
self.sort() in the proxy model.


Cheers,
frank


On 26/06/12 7:32 PM, Frank Rueter | OHUfx wrote:
> Hi all,
>
> I'm trying to implement a custom sort behaviour on my first model/view 
> structure and am hitting a road block (undoubtedly human error).
> My model is just a list of dictionaries all living in column 0 of 
> their respective rows. I am not splitting up the dictionaries' keys 
> into their own columns as I need to draw each one as a single custom 
> widget/delegate eventually (maybe this is possible anyway??).
>
> The sorting code in my proxy model code like like this:
>
>     def sortBy( self, attr ):
>         self.__sortBy = attr
>         self.sort( 0, Qt.AscendingOrder ) # THIS DOES NOT GET CALLED 
> WHEN THE COMBO BOX CHANGES A SECOND TIME
>
>     def lessThan( self, left, right ):
>         '''Custom sorting behaviour'''
>         leftTool = ( self.sourceModel().itemFromIndex( left ) )
>         rightTool = ( self.sourceModel().itemFromIndex( right ) )
>         leftData = leftTool.data()[ self.__sortBy ]
>         rightData = rightTool.data()[ self.__sortBy ]
>         return leftData < rightData
>
>
> As the comment in the code says, the first time I call sort() it works 
> fine, but subsequent calls do nothing. It's like nothing exists in 
> column 0 anymore after things were sorted once?!
>
> I'm sure I'm missing something very obvious here.
>
> Here is the entire test code:
> http://pastebin.com/iuqXbdtm
>
> I'm not sure if I'm even going about this in the right way so any help 
> would be greatly appreciated as usual.
>
> Cheers,
> frank
>
>
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