[vtkusers] vtkRenderWindowInteractor Timer callback

[David Cole]

"// Initialize must be called prior to creating timer events."

This comment and "example / test" code for interactor timers can be found
in:
VTK/Rendering/Testing/Cxx/TestInteractorTimers.cxx

Also, you should use CreateRepeatingTimer or CreateOneShotTimer which are
newer APIs that replace the old single timer implementation accessed via
CreateTimer...


HTH,
David


On 2/8/08, Wesley Smith <wesley.hoke at gmail.com> wrote:
>
> Hi,
> I'm trying to figure out how to get the callback from a timer on a
> vtkRenderWindowInteractor.  I'm adding the interactor to the window
> with SetRenderWindow, and then calling:
>
> win->m_iren->CreateTimer(VTKI_TIMER_FIRST);
>
> This is on Windows by the way.  Then, I do
>
> class myCommand : public vtkCommand
>         {
>                 public:
>                         static myCommand *New()
>                         { return new myCommand; }
>
>                 virtual void Execute(vtkObject *caller, unsigned long,
> void* CBdata)
>                 {
>                         printf("Timer\n");
>                 }
>         };
>
> myCommand *cmd = myCommand::New();
> win->m_iren->AddObserver(vtkCommand::TimerEvent, cmd);
>
> And finally start everything up.  The problem is I'm not getting any
> any callbacks.  Clearly since this isn't working I'm not understanding
> how to do this.  What is the canonical method for betting a timer
> callback here?  Google and the VTK docs haven't turned anything up.
>
> thanks,
> wes
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