Clickable -- active/activated?

I'm going to bring clickable into this focus model, as it needs to 
change a great deal due to this new event model.

Towards that end, what's the difference between active and activated? 
The current documentation doesn't really give it away:

   active ---- : the active state
   activated - : when activated but not necessarily active

What would have to happen to make something active, and what would have 
to happen to make something activated?

d