Re: Visitors Underused?

Sean P. DeNigris wrote I gave it a shot and think it worked out pretty well. A few methods and an instVar removed from MAContainerMorph, in exchange two methods for a pluggable visitor. The visitor(s) themselves are two MAVisitor subclasses with 1 API method each, and one instVar with accessors. Magritte-Morph-SeanDeNigris.89 [FEATURE]: MADescriptionMorphs use visitor pattern to allow customization Simple Use Case: layout labels above field widgets instead of to the left 1. Subclass MAMorphicContainerVisitor, overriding #visitDescription: 2. Subclass MAContainerMorph, overriding #visitorClass supplying #1 3. In your domain class, override #descriptionContainer to send #morphClass: iwith #2 Details: - New MAMorphicVisitor build morphs for each of a MADescriptionMorph's fields and add them to its morph - Now you can easily override the building of different field types by subclassing MAMorphicVisitor - MAContainerMorph - remove all #children related logic, as that work is now delegated to the visitor - custom visitor can be specified by overriding #visitorClass ----- Cheers, Sean -- View this message in context: http://forum.world.st/Visitors-Underused-tp4815294p4815398.html Sent from the Magritte, Pier and Related Tools mailing list archive at Nabble.com.