[Interest] Calculate FPS with QGLWidget - paintGL() is not called

[Samuel Rødal]

On 02/10/2012 08:56 AM, ext Dietrich.Gossen at continental-corporation.com 
wrote:
>
> I am trying to calculate the fps of my application. I know in general
> how to do it, but my implemented QGLWidget doesn’t work properly. The
> paintGL() Method doesn’t get called.
>
> That’ how my own Widget GLWidget looks like:

My guess is that paintGL() doesn't get called since you're using the 
QGLWidget as a viewport in graphics view. The viewport itself doesn't 
get a paint event, it's QGraphicsView::paintEvent() that creates a 
QPainter on its viewport().

If you want to measure FPS you could override 
QGraphicsView::drawForeground() or similar, as its called once per frame.

--
Samuel