[vtkusers] Callbacks from the render window interacor /interactorstyle

[Vidyadhar]

Hi,
If I look in documentation for vtkInteractorStyle I do not find this method. 
But it is defined by vtkObject and inherited by vtkInteractorStyle. I have 
used it on vtkInteractorStyleUser and sometimes on other styles too. I think 
you only need to monitor the interaction and not modify behavior of that 
interaction. In that case you can add observer on whatever style is suitable 
for your purpose.
HTH
Vidyadhar
----- Original Message ----- 
From: "Klaus Nowikow" <klaus.nowikow at tuwien.ac.at>
To: <vtkusers at public.kitware.com>
Sent: Monday, June 09, 2008 3:37 PM
Subject: Re: [vtkusers] Callbacks from the render window interacor 
/interactorstyle


> Vidyadhar wrote:
> > Hi,
> > I do not know exactly how to do this in Python
>
> No problem, I just mentioned it because sometimes things are a bit
> easier in Python than in C++.
>
> > but vtkInteractorStyle
> > has two events - InteractionEvent and EndInteractionEvent.
>
> Ah, yes, just found them in the docs. Thanks.
>
> > InteractionEvent can be used to contiously update camera position (but
> > it can slow down things). If you can add observer for one/both these
> > events and then get query camera's position then you can update the
> > edit box.
>
> That would be the right way to do it. I just can't find an "AddObserver"
> method (or something like that) anywhere -- or maybe I am looking at the
> wrong places.
> I think I could also use vtkInteractorStyleUser instead, but then I would 
> virtually implement vtkInteractorStyleTerrain with some additional
> code to update the edit boxes. I will do that if there's no other
> solution, but I'd rather re-use existing classes.
>
> > HTH
> > Vidyadhar
> > ----- Original Message ----- From: "Klaus Nowikow"
> > <klaus.nowikow at tuwien.ac.at>
> > To: <vtkusers at public.kitware.com>
> > Sent: Monday, June 09, 2008 1:14 PM
> > Subject: [vtkusers] Callbacks from the render window interacor /
> > interactorstyle
> >
> >
> >> Hi,
> >>
> >> is it possible to get a notification from a vtkRenderWindowInteractor
> >> (using vtkInteractorStyleTerrain in my case) when the user changes the
> >> camera position? I'd like to present the camera position to the user
> >> in an edit box.
> >> I am using VTK with Python.
> >>
> >> Regards,
> >> Klaus
> >>
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>
>
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