Wanted to add my input to this one.
Firstly, I agree tight coupling is not good practice in regards to architecting
an application. However, where event mechanics are concerned, it's impact can
be slightly negated by using weak listeners - which are good practice in
general.
Secondly, I haven't thought this through, but I'm throwing it out there anyway.
Maybe a static EventManager class somewhere in your root/main application
class, that uses custom events could be worth investigation. Actually, I'm all
over this at the moment, as finding a generic solution for an application's
event mechanics is the piece of the puzzle I'm currently up to.
Stephen.
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