[vtkusers] qvtk problems with the pipeline

[Dominik Szczerba]

My pipeline works all right and gets updated on demand properly. I 
achieve it by connecting spinboxes/lineedits etc. to functions that set 
parameters of my filters before I explicitly hit the final 'apply' 
button. The annoying problem is that the pipeline gets executed also 
when I interact with the render window (click to rotate etc.). I did not 
(intend to) set up such functionality, I want the pipeline to execute 
only after an explicit button click (like in paraview). How do I find 
out who is triggering the pipeline behind my back?

- Dominik

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