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qtopenglqt4qglwidgetqt4.8

Changing QWidget with QGlWidget in Qt 4.8.0

I am working on an application that currently uses QWidgets for rendering moving images, and I am trying to move from using QWidgets to QGlWidgets, but my application keeps crashing. The only modifications I've done are:

from this:

class MyClass : public QWidget 
{
     MyClass(QWidget *parent):QWidget(parent)
     {
          ...
     }
}

to this:

class MyClass : public QGlWidget 
{
     MyClass(QWidget *parent):QGlWidget(QGLFormat(QGL::SampleBuffers),parent)
     {
          ...
     }
}

Do I have to modify my code more, if so what other modifications are needed?

I am currently using Visual studio 2010, and qt 4.8.0

Solution

  • I found what the problem was. In my QWidget class I had a member object QPainter, that I would reuse in the paint event. I kept searching and found that this is a bad practice, so now I declared a QPainter object at the beginning of the paint event and my problem is solved.