Serious problem with QGLWidget

[al101]

Hello

I'm looking to write an opengl based editor using QT but I'm experiencing a problem with QGLWidget. I have implemented a camera class and it moves smoothly when I move it 'programmatically' and from input using the mouseMoveEvent, but when I update the camera using input from keyPressEvent it is erratic and shows what looks like a double image of the previous frame. I've subclassed the QGLWidget and placed it on my main window and tried adding the keyPressEvent function to the opengl widget class and as a function of main window but the same problem remains.

Has anybody else experienced this problem, which I belive is caused by the high number of keyboard events being sent, and know of a way to work around it for smooth keyboard input?

I am currently using version 4.3.0beta/Mingw with QDevelop and have an example program that allows you to switch from one input method to another as a test. It contains all the source code and project file too. The download is available here at http://www.alsprogrammingresource.com/Test.zip

Regards
Alan