On Wednesday 09 March 2005 12:16 pm, Truls A. Tangstad wrote: > I've been testing and debugging to find a problem in our code where > plots just weren't drawn (or rather drawn in white on white > background), which I finally tracked down to be the way I used QColor. > > I assumed that passing a combined rgb-value as an int to QColor() > would create the right color according to [1], but I kept getting > white, no matter what rgb value I set. What was even stranger was that > the QColor-methods red(), green() and blue() returned the correct > value for the created QColor-instance. > > I found that the problem was the default value for the pixel-parameter > (documented in [1] to be pixel=0xffffffff). When setting the value to > -1 or 0xffffffff explicitly, everything worked fine. When omitting it, > the color displayed as white (might be specific to my system). > > Also, creating an empty QColor, then setting rgb with setRgb() works > fine. > > I created a small example (attached) showing the problem, creating two > QMainWindows that should be painted red, but for me displays as one > white and one red. A C++ port of the code did not have the bug. > > My software versions are as follows (running debian unstable): > python2.3-qt3 3.13-4 > libqt3c102-mt 3.3.3-8 > libqt3c102 3.3.3-8 > > And yes.. I know this is really a minor issue, as I can easily work > around it, but I hope that fixing the problem will keep others from > spending as much time as I did to try to figure out why their code > misbehaves. > > [1] - http://doc.trolltech.com/3.3/qcolor.html#QColor-4
They are both red for me. Phil _______________________________________________ PyKDE mailing list [email protected] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
