On Tue, May 20, 2008 at 1:50 AM, Liviu Andron <[EMAIL PROTECTED]> wrote: > setRepresentedObject: is a hint, thanks, but it doesn't resolve the problem > either: he MUST copy every property from the original NSButtonCell (font, > attributedTitle, imageDimsWhenDisabled, etc).
This is how you will have to do it. Or you could write a wrapper, although NSButtonCell has a lot of methods. You'll probably want to intimately understand NSProxy and how messages work in Obj-C. Cocoa doesn't have a copy constructor design pattern, because one is not generally required. This isn't that usual. Java doesn't mandate one either. > He could use copyWithZone (or, > better, memcpy) , but maybe there's a pointer there, that will be used after > some copy is destroyed :(( No, you can't use copyWithZone:. It will never do what you want. Looking back at your code, I think you misunderstand how zones work. A zone is not a block of memory, but a collection of regions of memory that blocks are/can be allocated from. They're heaps. Besides, shallow copying is only a concern if you are subclassing. If you're using representedObject plus a bunch of category methods, then you will never have to worry about copyWithZone. Remember, representedObject is an ivar that NSCell is aware of. If it *didn't* properly handle representedObject in its implementation of copyWithZone:, then that's a serious bug of NSCell, not your code. Still, it would probably be a good idea to make sure your representedObject itself conforms to copyWithZone in a sane way. Also, supporting NSCoding would be a good idea. > My high-level goal: > "he wants an Objective-C equivalent to a C++ copy constructor" You need to go a little higher. WHY do you need a C++ copy constructor? You talk about someone modifying your nib in IB. Why is someone doing this w/o understanding the class hierarchy of your application? _______________________________________________ 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]
