[Digikam-devel] [Kde-imaging] Exposure Blending tool finalization...

[Marcel Wiesweg]

> Andi,
> 
> I create a new version of PreviewImage widget in libkipi-plugins,
> using QGraphicsView,as you have done in RedEyesRemoval, Plus some
> improvements, as toolbar,
> 
> I checked code from libksane, where Sare has used also QGraphicsView.
> Idem into DarkRoom from Ciry Berger (Krita team).
> 
> In all case, Zoom and panning is slow. Can you reproduce ?
> 
> I make something wrong with Scene cache settings ?
> 
> Sound like Qt4 APi is not yet optimized here.(:=))))
> 
> In all case, digiKam::PreviewWidget using imlib2 code is very well
>  faster...

Are you using Qt facilities to implement the zooming?
I would expect to continue using the current zooming code when drawing on the 
graphics view.