paintEvent and the strange image distortion

[roxton]

Hello! And again I have problems with the waveform rendering in my EKO wave editor (http://eko.git.sourceforge.net/git/g...eko/eko;a=tree).
When I paint an image directly on the widget surface, I get some weird rectangles over my image. Here is a picture:



You can see the current code at: http://eko.git.sourceforge.net/git/g...nt.cpp;hb=HEAD - at CWaveform:aintEvent

It seems that the parent widget and the scrollbar affects the waveform widget in a some way, but I cannot figured out how exactly and what I can do with that.