How to draw text to a QPixmap and then draw the pixmap to a QGLWidget? (PyQt4)

[wysota]

However I did not realize that calling QPainter::begin made the entire client area subject to the painter. Is there a method of QGLWidget to return a subsection of its client area as something that can be passed to QPainter?

QPainter works on a QPaintDevice. QGLWidget is a QPaintDevice. "Subsection of QGLWidget" is not a QPaintDevice.

How does your complete paintGL() implementation look like and why are you subclassing QPainter? Doesn't the white colour come from setting the OpenGL fill colour to white?