[Newbies] what's a model?

Aidan Gauland wgsilkie at ihug.co.nz
Thu Dec 11 04:38:18 UTC 2008

Oh yes, I've read Squeak By Example and played around with Morphic a bit 
(although haven't created anything useful with it), I just need to figure out 
how to write a class that I can use as a "model" with Morphs such as 

tjohnson at iwu.edu wrote:
> Aidan,
> A "model" is the logic of your program.  Generally, it is the abstract concept that your UI 
> attempts to present to the user.  For example, if you are creating a personal finance 
> program, your model might consist of objects like BankAccount and Transaction, whereas 
> your UI might consist of BankAccountView and TransactionView.
> "Model" is one third of the time-tested concept of Model-View-Controller, which is a 
> "pattern" for creating programs with user interfaces.  If you search for MVC on the web, you 
> should find some pretty useful information.  Generally the theory behind MVC is that your 
> application's logic (or model) should be separate from its interface / presentation (view).  The 
> controller would be some "glue" which mediates between the model and the view, but often 
> the controller is sort of melded into the view these days.
> Squeak does include a class called Model, which is abstract and not much used these days.  
> Best not be distracted by it.
> Hope that helps!  Have you looked at some of the great Morphic tutorials on the web?  I 
> found the chapter in Squeak By Example very informative.

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