On 23 Jul, 2008, at 23:26, Gary Bernhardt wrote:
You need to wrap you alertEnded... method with PyObjcTools.Apphelper.endSheetMethod: @PyObjcTools.Apphelper.endSheetMethod def alertEnded(self, alert, choice, context): ... (Methods wrapped with endSheetMethod don't need the ObjC name mangling, so you can name it whatever you want.) I have a very weak understanding of why this is needed, but it's something related to sheet callback methods not having a fixed signature.
That's the right fix, and it is needed because the arguments of the callback (the alertEnded method above) aren't all instances of NSObject. Some of them are basic C types. If you don't tell PyObjC about this the bridge won't know that and will happely treat a C integer or 'void*' value as an object reference, which will almost certainly crash your program.
Decorators like endSheetMethod aren't needed for most other methods because either the method signature is simple (all arguments are objects, as is the return value), or PyObjC can deduct the correct method signature from the super class or protocol definitions.
Ronald _______________________________________________ Pythonmac-SIG maillist - Pythonmac-SIG@python.org http://mail.python.org/mailman/listinfo/pythonmac-sig
