[Pharo-project] Understanding Morphic programming
Hello list: I've read *"Squeak by Example"* and looked at some Morphic tutorials and example Morphs. I still don't understand how to organize my code with Morphic, =( 1) How should I separate the model from the graphical representation? Object subclass: #Person instanceVariableNames: 'name address email' Morph sublcass: #PersonMorph instanceVariableNames: 'person' The morph can then show and update the model when changed. 2) What happens if the model is changed by another class. How does the morph gets notified? What is the preferred approach? Thanks in advance!
2009/11/12 Alex Schenkman <alex@schenkman.info>:
Hello list: I've read "Squeak by Example" and looked at some Morphic tutorials and example Morphs. I still don't understand how to organize my code with Morphic, =( 1) How should I separate the model from the graphical representation?
Object  subclass: #Person   instanceVariableNames: 'name address email' Morph sublcass: #PersonMorph    instanceVariableNames: 'person' The morph can then show and update the model when changed. 2) What happens if the model is changed by another class. How does the morph gets notified?
The way how you wiring a presenter with model is using dependency. person addDependant: myMorph. then in Person class, whenever something is changed, like: name: aNewName name := aNewName. self changed: #name "notify dependants that receiver is changed" then your morph get notified about such change and could decide to refresh the displayed data. There always could be better ways (like using Announcements), but above one sits there quite a while :)
What is the preferred approach? Thanks in advance! _______________________________________________ Pharo-project mailing list Pharo-project@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
-- Best regards, Igor Stasenko AKA sig.
participants (2)
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Alex Schenkman -
Igor Stasenko