[vtkusers] flickering when using QT

[Anja Ende]

Hi everyone,

So, I have managed to render above a QVTKWidget window using QT.

However, there is one nagging problem. So, I have a set of points that I can
interact with using the mouse and move them around. But whenever I move a
point around there is a lot of flickering. I am using Qt4 and double
buffering is on by default.

Hoping that anyone who has more experience using QT with VTk might give some
advise on how to achieve flicker free rendering.

Cheers,

Anja
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