OpenGL with Graphics View?

[olidem]

Well, that's not so easy.
First, AFAIK not every system supports these framebuffers. Pls correct me if I'm wrong.

Secondly, I would have to initialize (initializeGL, resizeGL and paintGL) this new OpenGL object. As I am doing it up to now, all these initialisations are already done for me by the Qt subsystem.
This means that I would have to ready out the projection and modelview matices everytime and keep a copy of them locally up to date.

[wysota]

It's either this or grabbing the widget or forgetting about GL... You can't use GL calls on a non-gl context and if you want a canvas that is different than the widget you have to set it up separately.