Re: [Adobe-source-devel] asl-users: View concept singleton state

[Sean P. <sp...@ad...>]

> Ah, I think we've found a problem in our thinking.

Yes - your are correct - there can't be a singleton value.

> The second API call should be invoked by the model, however, and is  
> indeed the only place where the call can take place.

I disagree with this - if a view wishes to behave in such a way it  
can receive any value and filter internally. If a view can only  
receive data of a given type then an exception would be thrown if it  
were attempted to be notified with a different type. Eventually we'll  
have type constraints on the model to avoid such behavior (or rather  
to check it statically) - but either way it should not impact the  
view interface. Having the model responsible for checking to see if  
data is displayable is backwards - the model is not aware of the  
display.

Sean