[vtkusers] Observer for vtkActors?

[Adrian Wyssmann]

Thanks Sean

-----Original Message-----
From: Sean McInerney [mailto:seanm at nmr.mgh.harvard.edu] 
Sent: Donnerstag, 18. November 2004 21:31
To: Adrian Wyssmann
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] Observer for vtkActors?

Hi Adrian,

   vtkActor never fires a LeftButtonPressEvent which can be passed to its
Observers. I think that the only events that you can catch from vtkActor are
DeleteEvent, ModifiedEvent, and PickEvent ... obviously, the closest to your
needs is PickEvent. Maybe a VTK Subject-Observer guru could expand on this.

Good luck!

-Sean

Adrian Wyssmann wrote:
> Hi all
> 
> I have a vtkRenderWindowInteractor on which I add some Observers. The 
> events are caught by the p3DSegmentCallback, which does the excepted
action.
> 
> vtkRenderWindowInteractor *pInteractor = 
> m_pRenderWindow->MakeRenderWindowInteractor();
> pInteractor->AddObserver(vtkCommand::LeftButtonPressEvent,
> p3DSegmentCallback);
> 
> 
> But now I only want that the action is only performed by clicking on a 
> specific vtkActor. My idea was like that:
> 
> m_pActorVolume1 = vtkActor::New();
> ....
> //don't know if the next 2 lines are needed 
> m_pActorVolume1->SetPickable(TRUE);
> m_pActorVolume1->SetDragable(TRUE
> 
> 
> //here I want to caught the action
> m_pActorVolume1->AddObserver(vtkCommand::LeftButtonPressEvent,
> p3DSegmentCallback);
> 
> 
> This doesn't work. When I click the left mouse nothing happens. Can 
> anyone help me?
> 
> Thanks in advance
> 
> Adrian
> 
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