[vtkusers] Tk interactor problems with VTK5.2.0

[Weinheimer, Oliver]

I noticed similiar effects for keyboard interaction for different widgets
after upgrading to version 5.2.0 and worte a bug report (ID 0007635) in the
VTK Bug Tracker. 



Dr. Carsten Bellon wrote:
> 
> I'm using vtkTkRenderWidget in my Tcl/Tk GUI. Than I choose the 
> trackball bindings by "SetCurrentStyleToTrackballCamera". Additional 
> mouse button bindings I define with "AddObserver ...". This works fine 
> with VTK 5.0.4 and earlier. But in VTK 5.2 the additional observers for 
> "...ButtonReleaseEvent" have no effect! Any help?
> 
> For example, I added one line to MaceTk.tcl from Examples/GUI/Tcl of the 
> VTK distribution:
> 
> duh_renWin_iren AddObserver LeftButtonReleaseEvent {bell}
> 
> Using VTK 5.0.4 I can hear the sound, with VTK 5.2.0 not! (With 
> LeftBottonPressEvent it works in both VTK versions.)
> 
> -- 
> Dr.-Ing.         BAM Berlin * VIII.36 * D-12200 Berlin
> Carsten Bellon   Tel/Fax: ++49 30 8104-3658 / -1837
>                  Carsten.Bellon at bam.de
> 
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