Describe the problem this feature would solve

I want to change the background of my Grid where RotatorTile lies, when the image in the RotatorTile is changing. Having OnCurrentItemChanging would be very helpful for solving this issue. Another issue this would solve is that I want my image to have a random rotating direction.

Describe the solution

I am expecting a function like
void OnCurrentItemChanging(object sender, RotatorTileItemChangedArgs args)
where args will inform me of the next item and even allow me to cancel the change.

Describe alternatives you've considered

I can use binding but that's inefficient I think, because I only need to change one part (background) of my control and I don't need to change others. But currently I need to put everything into the ItemTemplate.