[vtkusers] Disabling interaction for imageplanes

[Prename Surname]

I am visualizing 3D volumes using 3 different vtkImagePlaneWidgets. It works
very well, and i can spin the picture and zoom etc.
The problem is that i have to press some area outside the widgets if i want
to pan/rotate/zoom etc. If i have the mouse over a imagewidget, it catches
the mouseevent first, and i cannot zoom and rotate etc. Instead it changes
contrast
for right mousebutton, and prints the mouseposition for leftmouse button.
This is very annoying, because it means that if i have zoomed into a
structure, so that the widgets fill up the whole screen, i cannot rotate or
zoom away or do anything because the mouseevents are caught by the widgets.
So I have to reset the camera if i want to get away from that area.
There must be a way to disable interaction with these widgets, so that i can
move freely and zoom as i want to etc.

How can i do disable the interaction with the widgets?

Thank you
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