GLWidget based Designer Plugin leaves nasty trace in Qt Designer

[ghorwin]

Hi there,

I created a QGLWidget based Designer plugin. While this works all very nice and well, once I start dragging the new widget in Designer from the toolbox onto my form, it leaves a nasty trace. Take a look at the attached picture.

Any suggestions what I could do about it? Is something missing in my plugin or is that a QGLWidget related problem?

Thanks for any ideas...
Andreas

PS: I implemented all required Gl functions (initialisation, resize, the drawing is done in the paintEvent)