Changing the interactor style when hovering an actor in VTK python

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I want to use the TrackballCamera InteractorStyle when I don’t hover my actor (a cylinder). In the case where the mouse is over the actor, I want to use the TrackballActor InteractorStyle.
I know that it is possible to change the current InteractorStyle with the StyleSwitch Object. I created it like this:

styleSwitch = vtk.vtkInteractorStyleSwitch()
styleSwitch.SetCurrentStyleToTrackballCamera()
self.interactor.SetInteractorStyle(styleSwitch)

I also know that i can change the current style by just calling one of the styleSwitch.SetCurrentStyleTo...() functions.

But how do I do this while hovering an Actor?