I'm putting together a prototype of an app and I have a ViewStack that is being controlled by a button toolbar. In each of these views there is a video player. What I need to do is to pause the video in the view that is being hidden. I see the change event triggered when I change views, but it seems that the target reference passed in via the event parameter is the new view. Is there an easy way to get a reference to the view being hidden? Or is there a different event triggered (something like a deactivate) that I can use to create a handler with a passed in reference to the departing view?