QGLWidget problem

[catalin1122]

Hello guys,

I am developing an OpenGL application using Qt. Until yesterday I was subclassing QOpenGLWidget to create my custom widget but after adding It to the main application which is a QMainWindow with a few buttons and three QGraphicsView it runs really slow. I have tried using QGLWidget and the application runs the same as without the OpenGL widget.

The problem I have is that the widget that I've made subclassing QGLWidget does not resize properly (or at least the OpenGL rendering area doesn't).

I will give you an example using hellogl2 example from Qt 5.5.

Using QOpenGLWidget I get:

Using QGLWidget I get:

I just changed the parent class from QOpenGLWidget to QGLWidget the rest of the code is the same. The same thing happens in my aplication.

I have tried to find a solution but I could not. May someone tell me why is this happening and how to solve it?

Thank you,
Catalin

[JunLi]

I had a similar problem with QOpenglWidget,
When I shaded my application main widget, paintGL function was triggered by the wheelEvent signal, but my opengl window didn't refresh, it was refreshed by any other signal, so I had to drop the shadow