Event on widget's creation

Is it possible to generate event when the widget created html-elements on page?
I want to manipulate with this widget when it’s ready.

What widget are you referring to?

Usually this can be done but we need more information.

I’m still working on ad-plugin, my idea is to use widget as more flexible way to display ads. For that I need an event when widget is rendered, then I can place DFP ads inside it.

I think I can resolve this by Ember Run Loop, the afterRender queue