[vtkusers] change slice with vtkInteractorStyleImage

[José M. Rodriguez Bacallao]

hi folks, I am displaying a dicom dataset using the new style imaging
classes and using vtkInteractorStyleImage with python. I know that
vtkInteractorStyleImage can change slices using the CTRL + Mouse Left
Button using: SetInteractionModeToImageSlicing but, I need to change
from one slice to another using mouse wheel and cursor keys, how do I
can achieve this?