[vtkusers] Update VTKWidget and QtProgressBar using QTimer

[Dejan Zivkovic]

I have some VTKWidget and a QProgressBar in the same QMainWindow.
VTKWidget has some scene that can be animated.

In QTimer I update both VTKWidget and QProgress bar, on every 33ms.

Problem is that QProgressBar won't update its GUI.
When I disable updating VTKWidget, QProgressBar updates its GUI.

Does someone see the possible problem in this?
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