Re: [Newbies] what's a model?
Hello Aidan, AG Oh yes, I've read Squeak By Example and played around with Morphic a bit AG (although haven't created anything useful with it), I just need to figure out AG how to write a class that I can use as a model with Morphs such as AG PluggableListMorph. any class that implements the necessary messages (e.g. #list) and returns the expected values will do. Squeak does include a class called Model, which is abstract and not much used these days. Best not be distracted by it. Together with MVC comes the dependency mechanism. This gives a model a chance to tell all views they need to update without explicit knowledge how many and if there are views. This is implemented in Object and is a bit refined in Model. Dependency is a bit non obvious and today events seem to be a preferred replacement. But IIRC all the Pluggabble...Morphs stand as Morphic replacements for the traditional MVC classes and thus use dependency. Practical consequence: If a PluggableListMorph watches an instance of YourModelClass this instance has to send itself #changed or #changed: to notify the PluggableListMorph to update itself. Cheers, Herbert ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] what's a model?
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. - TimJ - Original Message - From: Aidan Gauland [EMAIL PROTECTED] Date: Wednesday, December 10, 2008 9:55 pm Subject: [Newbies] what's a model? To: beginners@lists.squeakfoundation.org Hello, I've been poking around on the web for information on how to build GUIs using Morphic's widget-like morphs, and I've found some helpful stuff, but a term that I see used a lot in this context is model, which I still can't figure out. So my question is: What's a model in Squeak? How do I use them with Morphs? Thanks, Aidan ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] what's a model?
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 PluggableListMorph. [EMAIL PROTECTED] 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. ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
