qopenglwidget.h includes qopengl.h needlessly - interferes with use

I'm writing a derived class of QOpenGLWidget that has member variables whose type comes from typedefs in <GL/glcorearb.h> (for example: PFNGLCLEARPROC.) However, this is difficult to make work correctly because the order of inclusion of different GL headers matters and because <QOpenGLWidget> includes <QtGui/qopengl.h> which in turns includes some GL headers.

I looked at qopenglwidget.h, and found that it doesn't seem to make use of any GL specific symbols. In fact, it seems to use a Pimpl to get around that. I can't even write a GL Pimpl for my own class, because I have to include MyGLWidget.h at the start of MyGLWidget.cpp which in turns includes the GL headers.

There are probably some alternate solutions that kind of work at the cost of making the code more complex, but I think that it's a mistake that <QtGui/qopengl.h> is included transitively from <QOpenGLWidget> in the first place. It makes the class harder to use, it doesn't seem to be necessary, and it violates the Qt tradition of using forward declarations effectively. The only advantage is that it's maybe more convenient for a novice OpenGL user who expects OpenGL functions to be brought in magically without realizing that OpenGL is a more complex beast than that, due to the fact that its functions have to be queried dynamically based on the platform's capabilities.