[Paraview-developers] Adding toggle to turn on/off interactions with 3-D widgets

[Will Schroeder]

At first glance I think that the right way to disable interaction is to 
convert this widget to the newer architecture (i.e., separate event 
processing from representation ala 
vtkAbstractWidget/vtkWidgetRepresentation). Then to turn "off" the 
widget the representation can be left on and the widget event processing 
disabled.

Another item on the todo list: we need to make sure that cursor changes 
are used to communicate to the user when widgets are active or not, that 
way it's easier to avoid moving a widget when you really mean to move 
the camera.

Will

Stanton, Eric T wrote:
> Hello--
>
> My customers have a need to be able to turn on/off mouse interaction
> with 3-D widgets in ParaView. When doing analysis using box widgets that
> requires precise placement, for example, they find it too easy to
> accidentally rotate/scale the box widget when they meant to do so for
> the entire model. 
>
> I'm proposing adding a checkbox to the 3D widget interfaces in ParaView
> (vtkPVBoxWidget, vtkPVSphereWidget) as well as a keyboard accelerator
> 't' to turn on/off mouse control over the widgets' size. If the former
> seems too intrusive to the ParaView code, the latter would be
> sufficient. vtkBoxWidget would also need to be modified to check the
> state of a flag to determine whether it should be allowing interactions
> to the widget or not.
>
> Is this something other people would find useful, or no?
>
> Thanks,
>
> Eric Stanton
> Sandia National Laboratories
> Data Analysis and Visualization
> 505-284-4422
>
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