[vtk-developers] Delayed mouse interaction due to event-loop bug in Qt5

[Christoph Kolb]

Dear vtk developers,

when I am using the QVTKWidget in VTK 6.1 with Qt5, the mouse 
interactions are severely delayed. I can reproduce this issue by 
starting the SimpleView example and rotating the text.

I think that this might be caused by a bug in Qt5, where the mousemove 
events are flooding the event queue:
https://bugreports.qt.io/browse/QTBUG-40889

However, other Linux distributions and Windows seem to be unnaffected by 
this. I have only observed it with Archlinux (Qt 5.4.0) so far.
Does anyone else have this problem, or do you know what else i could check?

Thank you!

Regards
Christoph