[vtkusers] Callback not firing?

[Francois Bertel]

Hello,

The event is listed in the doc, see Events section:

http://www.vtk.org/doc/nightly/html/classvtkInteractorStyleRubberBand2D.html


I agree that every class should clearly document which events it can
invoke. And not only that but also the optional calldata coming with
it: a while ago I ran grep on the VTK source tree to track down all
events invoked with a calldata and I collected the result in the
documentation of vtkCommand. See the part that starts with "Here is
the list of events that may be invoked with a none NULL callData."

http://www.vtk.org/doc/nightly/html/classvtkCommand.html

Regards.

On Mon, Oct 19, 2009 at 1:51 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
> On Mon, Oct 19, 2009 at 10:35 AM, Jeff Baumes <jeff.baumes at kitware.com> wrote:
>> I don't see in your code the line:
>>
>> style->AddObserver(vtkCommand::SelectionChangedEvent,SelectionChangedCallback);
>>
>> The interactor style invokes the event, so you need to attach the
>> callback to it.
>>
>> Jeff
>>
>
> Thanks Jeff - that did it. This is exactly the type of thing I am
> trying to sort out and make examples of for the wiki (although I think
> the better solution is still for better documentation in the classes
> themselves so the doxygen pages contain this type of information).
>
> Another thing: I tried to override this function:
>
> void vtkInteractorStyleRubberBand2D::OnLeftButtonUp()
> {
>  vtkstd::cout << "LeftButtonUp!" << vtkstd::endl;
> }
>
> but now when I release the button the rubberband outline is not
> erased. I'm assuming I have to "forward" the event to whichever
> function was going to handle this before I overrode the function - how
> would I find out which function that is / how to do that?
>
> Thanks,
>
> David
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François Bertel, PhD  | Kitware Inc. Suite 204
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