On Wed, 08 Apr 2009 20:26:55 +0530, Shriramana Sharma <[email protected]> wrote: > Hello first of all let me clarify that this is specific to PyQt and does > not existing in C++/Qt. > > I am using PyQt 4.3.3 on Qt 4.4.0 on Kubuntu Hardy. > > I attach three files. > 1. test.py is the one that demonstrates the problem. > 2. test.cpp is the equivalent C++ version that shows no problem. > 3. test-sol.py is the Python version that works. > > I wanted to draw a rubberband on a widget, and ended up finding this > bug. Everytime the mouseMoveEvent is processed, the value of the > variable rbOrigin (origin of the rubberband) is reset to the current > event position, thereby making it impossible for a proper rubberband to > be drawn. However, it appears that the mousePressEvent (which sets the > value of rbOrigin) is definitely not called by mistake as I don't get > any debug output. > > The equivalent C++ version works without problems. > > Using global coordinates on Python works around the bug but I don't see > why.
See... http://www.riverbankcomputing.com/software/pyqt/roadmap/index.html#implicit-copying-of-const Making an explicit copy of event.pos() in mousePressEvent() will probably fix it. Phil _______________________________________________ PyQt mailing list [email protected] http://www.riverbankcomputing.com/mailman/listinfo/pyqt
