It would be best to isolate the problem using a minimal compilable example.
It would be best to isolate the problem using a minimal compilable example.
Oopps, I'm a bit dizzy late at night. I've produced a minimal example and figured out that the problem is with the line:
Qt Code:
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Removing it solved the problem. I just tought it could speed up the performance of drawing grid.
Thank you for your help.
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