[vtkusers] How to Add multiple AddObserver in C++/Windows ?

[Mathieu Malaterre]

> 1) Data conversion - strict type checking does not allow C++ code to compile.
> 	( Posted twice )

Sorry I don't understand ? Could you give us an example ?

> 2) How to add multiple AddObserver function.  
> 	TCL example ImageInteractor.tcl uses 3 events as below.. How to add it
> 	properly.
> 
> 	interactor->AddObserver(vtkCommand::LeftButtonPressEvent, startZoom);
> 	interactor->AddObserver(vtkCommand::MouseMoveEvent, startZoom::MouseMove);
> 	interactor->AddObserver(vtkCommand::LeftButtonReleaseEvent, EndZoom);
> 
> 	Currently, I have done by creating class as below
> 	class vtkMyCallback : public vtkCommand and having one callback with name
> 	of Execute() : As done in Cone6.cxx example.
> 
> 	Is this right?
> 	What is best way to do it? 

'best' I don't know, however have a look at:

http://public.kitware.com/cgi-bin/cvsweb.cgi/ParaView/ParaView/vtkPV3DWidget.cxx?cvsroot=ParaView
Look for 'vtkPV3DWidgetObserver'

> 3) I have one observation, while we create default window interactor in Window/OpenGL
> 	then Zoom, Image movement and rotation events are little abrupt. There seems
> 	to be no proper control by user. Either you end up making it too big or move
> 	out of scence.
> 	What is problem here ??
> 

Press 't' for trackball ... (default mode is 'j' joystick)

> Thanks & Regards

HTH
mathieu