I can imagine grabbing GL widget will not work. You might try grabbing the desktop widget and cutting out the interesting part. Otherwise you might need to use QGLFrameBufferObject to render the widget to the buffer and then convert it to an image.
The "Q"
Re: QPixmap::grabWidget and QPixmap::grabWindow with QGLWidget-derived object
I can imagine grabbing GL widget will not work. You might try grabbing the desktop widget and cutting out the interesting part. Otherwise you might need to use QGLFrameBufferObject to render the widget to the buffer and then convert it to an image.
y.shan (21st January 2011)
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