> Note that show/hide is not limited to StackContainer descendants like ViewStack. It can also apply to showing popups and dropdowns, and SidePane. Dijit switches between the terms onShow/onHide and onOpen/onClose but for 2.0 I was thinking of combining them. You should think about what event names (if any) you will want to use for when Dialogs and drop downs appear.

I fully agree this approach needs/has to be extended to things like Dialog. I'm unfortunately not sure exactly how however. Any idea is welcomed.