[Interest] osgQt GLWidget reparent issue

[baneyue]

Hi there:

I got a problem using osgQt in my project. The main issue is something
related to the GLWidget.

osgQt use a GLWidget inherited from QGLWidget as its graphics context, I
add this widget to my mainwindow, everything just word fine.

*BUT* when I reparent its parent, the GLWidget show nothing but whole
black background, I really need to reparent it, so I am stucked.

Anyone familiar with this?

	baneyue