As it happens to me usually, talking on IRC revealed another interesting topic to talk about. One developer was asking a question why part of his application window suddenly became blank after the mouse entered the window. Even though it's not really my area of expertise, I guessed it was related to painting, so after some conversation, I ended up suggesting setting the QT_FLUSH_PAINT environment variable, which causes the Qt painting system to paint the update regions yellow.
That reminded me of a BoF session my good friend Simon Hausmann gave at Akademy 2007 where he was going over a list of hidden gems. So I thought it was high time to rehash that list and tell you about it. By the way, if I'm not mistaken, the first inception of the Qt "tracer" graphics system was created by an audience member during Simon's session (I think it was Mirko Böhm, but I'm not sure now).
So what are the Qt hidden gems? I've collected a list for Qt, Qt Creator and Qt WebKit. Unfortunately, I don't know the Qt Mobility source code that well, so I couldn't create a list for that project.
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