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Re: Custom View Bindings (was : NSTextView's "data" binding)

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Re: Custom View Bindings (was : NSTextView's "data" binding)

Subject: Re: Custom View Bindings (was : NSTextView's "data" binding)
From: Steve Weller <email@hidden>
Date: Mon, 30 Apr 2007 16:47:58 -0700


KVO:
	model -->> controller -->> view

KVC:
	view --> controller --> model

I recommend putting this diagram right up front in the KVO/KVC/ Bindings documentation. It took me a long time to get this simple, clear model into my head.

But also be clear about what the arrows mean: a --> b means that messages flow from a to b. For KVO the messages flow in response to observations that go the opposite way (the controller observes the model) and message passing starts with a change to the model. For KVC message passing starts with an event from the user. Bindings are made in the same direction as the messages: views bind to controllers.


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References:  
  >Custom View Bindings (was : NSTextView's "data" binding) (From: Yann Bizeul <email@hidden>)
  >Re: Custom View Bindings (was : NSTextView's "data" binding) (From: mmalc crawford <email@hidden>)




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