14 #ifndef vtkXInteractionDevice_h 
   15 #define vtkXInteractionDevice_h 
   18 #include "vtkRenderingOpenGL2Module.h"  
   26   void PrintSelf(ostream& os, 
vtkIndent indent);
 
   30   virtual 
void Initialize();
 
   34   virtual 
void ProcessEvents();
 
   38   ~vtkXInteractionDevice();
 
   44   vtkXInteractionDevice(const vtkXInteractionDevice&);  
 
   45   void operator=(const vtkXInteractionDevice&);  
 
   47   void ProcessEvent(XEvent &event);
 
a simple class to control print indentation