[Qgis-developer] Re: Renderer improvements masked for mac

[Marco Hugentobler]

Hi John

The incremental update was disabled because of update problems when resizing 
the main window of QGIS on Mac. I tested it on a Mac at university and as far 
as I remember, there was a difference with painting events coming from Qt that 
caused the problems.

Could you test if this still is true? For testing, take out the ifdefs in 
qgsoptions.cpp and also in qgsvectorlayer.cpp. Then take a large vector layer 
that is updated several times. Start drawing and while it draws, resize the 
QGIS window several times. Then do the same also with WMS layers.

If there is no problem with it any more, I will be happy to remove the ifdefs, 
as I like the incremental render updates very much too.

Regards,
Marco

Am Sonntag, 3. Januar 2010 02.49:42 schrieb John C. Tull:
> Marco,
> 
> In trying to test the polygon dashed line issue, I removed the mask of the
>  following lines from qgsoption.cpp that I added a few days ago on my
>  source file. The lines are:
> 
>  #ifdef Q_WS_MAC //MH: disable incremental update on Mac for now to avoid
>  problems with resizing groupBox_5->setEnabled( false );
>  #endif //Q_WS_MAC
> 
> I am not clear why the above is set for Mac's. I'm not sure what the
>  resizing issue is. I see no ill effects when I mask these lines, and the
>  performance gains are much too great to not have this feature available.
>  This is truly makes qgis a much more enjoyable program for production
>  work, in my opinion.
> 
> Can we take this out unless there is a specific issue that can be pointed
>  out and tested?
> 
> BTW, this had no effect on the polygon boundary. I'm in the dark on why the
>  problem was present, but now is gone. Strange...
> 
> Regards,
> John
> 

-- 
Dr. Marco Hugentobler
HUGIS - GIS programming and consulting
Webereistr. 66
CH-8134 Zürich
marco at hugis.net
http://homepage.hispeed.ch/hugis/
Technical Advisor QGIS Project Steering Committee