[vtkusers] vtkcommand and events

[David Feng]

I suspect that you're adding the observer to the wrong class, because I 
don't think renderers receive LeftButtonPressEvents.  You probably want 
to add your observer to the interactor style instead.

David

Radu Ilinca wrote:
> To: vtkedge at vtkedge.orgHi <mailto:vtkedge at vtkedge.orgHi> all !
>  
> I am trying to catch the LeftButtonPressEvent event using the 
> observer/commannd architecture.  Code is pretty simmilar to the one in 
> the book where it catches the StartEvent (and the code works) but i 
> try the LeftButtonPressEvent.  Code below:
>  
> class vtkMyCallback : public vtkCommand {
> public: static vtkMyCallback *New() { return new vtkMyCallback; }
> virtual void Execute( vtkObject *caller, unsigned long, void*) {
> vtkRenderer *ren = reinterpret_cast<vtkRenderer*> (caller);
> cout << "ana are mere " << endl;
> }
> };
>  
>  
> ... in the main ()  i have:
>  
> vtkMyCallback *mycallback = vtkMyCallback::New();
> ren1->AddObserver(vtkCommand::LeftButtonPressEvent, mycallback);
>  
> I am using Visual Studio 2008 and WinXP
>  
>  
> The problem is that, I don't catch the event and actually the code 
> never enters the Execute function. Could someone tell me why ?
>  
> Best,
> Radu.
>
>
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