[vtkusers] Event Handling with SelectionChangedEvent

[Aytekin Vargun]

Thanks a lot Jeff.
This really worked.

PS: I hope this message won't create a new thread. I apologize if it
happens.
Aytekin

On Tue, Feb 10, 2009 at 8:38 AM, Jeff Baumes <jeff.baumes at kitware.com>wrote:

> Hi Aytekin,
>
> Based on previous emails, I believe your "selections" object is a
> vtkDataRepresentation, which does not emit any key press events (or
> mouse events). These events are emitted by the interactor style. So
> you'd do something like
>
>
> win->GetInteractor()->GetInteractorStyle()->AddObserver(vtkCommand::KeyPressEvent,
> callback);
>
> where "win" is your vtkRenderWindow instance. This should be done
> after the SetupRenderWindow call.
>
> Jeff
>
> On Mon, Feb 9, 2009 at 11:11 AM, Aytekin Vargun <varguna at gmail.com> wrote:
> > Hi,
> > I am currently having problems with my event handler and would appreciate
> if
> > anybody suggests me  a solution.
> >
> > The ProcessVertexSelection (user defined) method is activated when some
> > selections are made (based on SelectionChangeEvent). Everything is good
> upto
> > this point. Here is the code for this:
> >
> > edgePicked->SetCallback(network->ProcessVertexSelection);
> > edgePicked->SetClientData((void
> *)static_cast<vtkSelectionLink*>(edgeLink));
> > selections->AddObserver(vtkCommand::SelectionChangedEvent, edgePicked);
> >
> > This part works and I can get the selections. Now I want to add another
> > functionality: The user may want to delete the current selections by
> using
> > key 'd' or "delete" whichever is simple to implement. I know that
> GetKeySym
> > can be used to get key symbol. However, if I add the following code to
> > activate another method to do deletions, the event handler ignores it. It
> > never activates the method which is named as EVTDelete (in my code) where
> I
> > plan to check which key is used.
> >
> > delPicked->SetCallback(network->EVTDelete);
> > delPicked->SetClientData((void
> *)static_cast<vtkSelectionLink*>(edgeLink));
> > selections->AddObserver(vtkCommand::KeyPressEvent, delPicked);
> >
> > Why doesn't my event handler listen do the keypresses other than the
> default
> > ones?
> > Thanks a lot.
> > Aytekin
> >
> > --
> > My web page: http://www.cs.rpi.edu/~vargua<http://www.cs.rpi.edu/%7Evargua>
> >
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>
>
>
> --
> Jeff Baumes, Ph.D.
> R&D Engineer, Kitware Inc.
> (518) 371-3971 x132
> jeff.baumes at kitware.com
>



-- 
My web page: http://www.cs.rpi.edu/~vargua
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