> I need a new type of NSButton/NSButtonCell that I am calling an > NSLatchButton. > Once it is pushed it stays pushed - pushing it again does not revert it back > to unpushed state. > (Of course there would be a method to set it to it's unlatched state but > pushing the button would not > invoke that action) > > However I'm not sure how to approach this. Should I use categories, > extensions, or subclass or what?
Why do you need a new button type? No matter how you want it to look, the behavior should be dictated by the controller layer. When its action is fired, simply force its state to be NSOnState. Depending on how you want it to appear, the existing NSButton/Cell should be configurable to taste. If you want a custom appearance, just use custom images (still, the standard button will work fine). > If I were dealing with the source code I would add to the button types enums > and add a method or case to deal with that type. Yes, and I would snarf the freezlehopper until it is within one tenth of a hoptzit of the specified framulator. But that's also unnecessary. ;-) Yes, of course you can subclass NSButton/Cell and add a new type, then override all the drawing routines, etc. to handle that case, but you *still* shouldn't force the button to take on the responsibility of application-specific logic (see "MVC design pattern"). It's your application's idea that a button can't be "unpushed" once it's pushed; it's your application's responsibility to enforce such a state once set. > But what suggestions do you have? Read the NSButton documentation *and* the target/action mechanism documentation (both easily searchable in Apple's reference library). You're making a mountain out of a mole hill. -- I.S. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
