AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Swing AbstractAction/Action relation to the MVC?          AppletTalk.com Forum Index -> Java GUI Toolkits View previous topic :: View next topic   Author Message Casper Guest Posted: Mon Sep 05, 2005 2:15 pm    Post subject: Swing AbstractAction/Action relation to the MVC? It's great to be able to isolate UI events into Swing actions so the same action is called from a menu, toolbar and/or shortcut. But what is its relevance to the MVC-pattern. I have isolated all UI actions of my app in a single ActionFactory class, but I am simple unsure about how this plugs in with a model. Are the actions part of the view or the controller? Any pointers or references greatly appreciated, Casper Back to top Giovanni Azua Guest Posted: Mon Sep 05, 2005 3:36 pm    Post subject: Re: Swing AbstractAction/Action relation to the MVC? Hi Casper, IMHO What you mean as actions is the Controller itself. The Controller (even though can be implemented generic enough) would know about/coupled with the interfaces of the View (visualization) and Model (underlying structures that could be e.g. persistent). I think one has reached the optimal MVC implementation whenever you can redefine/switch any of the three components without breaking the other two e.g. Swing application optimally implemented as MVC is converted into Web Application by switching to a different View component, ideally the Controller would be easily wrapped or extended to support the J2EE-specifics e.g. servlets HTH, Best Regards, Giovanni "Casper" <casper (AT) jbr (DOT) dk> wrote Quote: It's great to be able to isolate UI events into Swing actions so the same action is called from a menu, toolbar and/or shortcut. But what is its relevance to the MVC-pattern. I have isolated all UI actions of my app in a single ActionFactory class, but I am simple unsure about how this plugs in with a model. Are the actions part of the view or the controller? Any pointers or references greatly appreciated, Casper Back to top Karsten Lentzsch Guest Posted: Tue Sep 06, 2005 12:55 pm    Post subject: Re: Swing AbstractAction/Action relation to the MVC? Casper wrote: Quote: It's great to be able to isolate UI events into Swing actions so the same action is called from a menu, toolbar and/or shortcut. But what is its relevance to the MVC-pattern. I have isolated all UI actions of my app in a single ActionFactory class, but I am simple unsure about how this plugs in with a model. Are the actions part of the view or the controller? Actions fit better into the "Presentation Model" (PM) pattern. And let me add that MVC is for components, PM and MVP are for applications. You can find descriptions of both MVP and PM at http://www.martinfowler.com/eaaDev/OrganizingPresentations.html I provide a "Desktop Patterns & Data Binding" presention where I show how Actions can be used in Swing in combination with the PM pattern. See http://www.jgoodies.com/articles/ Hope this helps. Kind regards, Karsten Lentzsch Back to top Giovanni Azua Guest Posted: Tue Sep 06, 2005 3:54 pm    Post subject: Re: Swing AbstractAction/Action relation to the MVC? Hi Karsten, "Karsten Lentzsch" <karsten (AT) jgoodies (DOT) com> wrote Quote: Actions fit better into the "Presentation Model" (PM) pattern. And let me add that MVC is for components, PM and MVP are for applications. You can find descriptions of both MVP and PM at http://www.martinfowler.com/eaaDev/OrganizingPresentations.html I provide a "Desktop Patterns & Data Binding" presention where I show how Actions can be used in Swing in combination with the PM pattern. See http://www.jgoodies.com/articles/ According to you what is fundamentally the difference between Presenter and Controller? and another comment, using the Observer Pattern is perfectly viable having a Controller that is totally decoupled from the other two (MV) e.g. Eiffel Event Library using agents. Why do you assert that MVC is only for components? e.g. Visual C++ applications use MVC Pattern, Java Web and Swing applications as well employ MVC. Kind Regards, Giovanni Back to top Karsten Lentzsch Guest Posted: Wed Sep 07, 2005 9:38 am    Post subject: Re: Swing AbstractAction/Action relation to the MVC? Giovanni Azua wrote: Quote: You can find descriptions of both MVP and PM at http://www.martinfowler.com/eaaDev/OrganizingPresentations.html I provide a "Desktop Patterns & Data Binding" presention where I show how Actions can be used in Swing in combination with the PM pattern. See http://www.jgoodies.com/articles/ According to you what is fundamentally the difference between Presenter and Controller? [...] I think Martin Fowler describes this well in this writing: http://www.martinfowler.com/eaaDev/OrganizingPresentations.html Quote: Why do you assert that MVC is only for components? e.g. Visual C++ applications use MVC Pattern, Java Web and Swing applications as well employ MVC. More precisely: MVC is better for components, MVP and PM are better for applications. In Smalltalk where MVC was invented, whole apps were built with MVC. Since modern toolkits already handle fine grained events, the application's presentation logic can focus on coarse grained events that lead to operations on the domain or presentation state. And yes, you can build a Swing application that uses MVC. But no, Swing itself doesn't use MVC; instead it uses a variant of MVC. For example in Swing the painting code and the event handling is not separated, it is typically done in a single class, the UI delegate. You can find some diagrams about the difference between MVC and the variant used in Swing in my presentations "Desktop Patterns & Data Binding" as well as in "Data Binding for Swing" at http://www.jgoodies.com/articles/ - Karsten Back to top Casper Guest Posted: Wed Sep 07, 2005 3:33 pm    Post subject: Re: Swing AbstractAction/Action relation to the MVC? Thanks to all for the answers. :) Regards, Casper Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> Java GUI Toolkits All times are GMT Page 1 of 1   Jump to: Select a forum Java Newsgroups----------------Java DiscussionsWeb-based java games comp.lang.java 3D Graphics API's for Java Java: Support and criticism Java System Announcements comp.lang.java.api JavaBeans Java and CORBA Java and Databases comp.lang.java.developer Java GUI Toolkits Java Help comp.lang.java.javascript JVM, native methods and hardware comp.lang.java.misc Java Language Programming Security and Java comp.lang.java.setup Java Software Tools comp.lang.java.tech ibm.software.java.linux  Non-English Java Newsgroups----------------Java Language (German)Language Java (Français)Java (Italian)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.