Hi Paulo,
Thank you very much for your replies. I am using VTK8.2.0 latest release.
I tried to use use OnStartRotate() and OnEndRotate() methods (instead of StartGesture() and EndGesture() methods) as you mentioned. But, only methods available are OnStartSwipe() and OnStartSwipe() - even if I attempt to use these two methods I get these errors:
'vtkInteractorStyleMultiTouchCameraExample::OnStartSwipe': method with override specifier 'override' did not override any base class methods
‘vtkInteractorStyleMultiTouchCameraExample::OnEndSwipe’: method with override specifier ‘override’ did not override any base class methods