[vtkusers] Fwd: Move distance widget on a plane

[Hector Dejea]

Hi all,

I'm trying to get a distance widget moving on a certain plane. The widget
measures the distance between two points which I want the user to be able
to modify. As the image is in 3D, when I move a point it doesn't stay in
the current plane and goes somewhere far away to other plane.

How can I force the widget to move on a desired plane?

Thanks.
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