Hi Ali,
thanks for your help. It does the job. Maybe you can help me on another item.
I've created an OpenGL canvas and attaches an handler for ButtonPress events.
This handler rotates a fe-model (wireframe) on the screen by a defined angle.
The problem is that he does it only ones and I have to click inside the canvas
again to do the next rotation and again and again.....
What I wnat to have is some sort of loop that keeps on calling this rotation
function as long as the button isn't relesed or
left the canvas.
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