Le 22 déc. 2009 à 10:56, Graham Cox a écrit :

> 
> On 22/12/2009, at 10:22 AM, Rich E wrote:
> 
>> Hi,
>> 
>> I am new to Cocoa and Objective-C both, but I need the two in order to get
>> tablet functionality into one of my favorite applications (Puredata) on Mac
>> OS X. First off, I know that you can get tablet event data through the
>> Carbon API, but I have ran into enough problems (along with no 64-bit
>> support) that I think trying it with Cocoa is worth a shot.  Puredata has an
>> API for writing plug-in's in C and I hear that it is possible to write the
>> entire plug-in in Obj-C but leave the host callback functions in standard C,
>> yet I still don't understand how to embark.
>> 
>> I learn best by examples, does anyone know of any existing C applications
>> that make use of Cocoa or Objective-C?  Else, any advice on how to combine
>> these two with a host written in C?
> 
> 
> The Carbon Event stuff is available in 64-bit, as far as I'm aware. Cocoa is 
> built on it, so these lower-level parts of Carbon are very likely to remain 
> available in 64-bit. It's mostly the higher level stuff, such as UI and 
> legacy managers that are unavailable.

The fact that Cocoa uses a technology internally does not mean that it will 
remain an API. Most of Carbon event is SPI on 64 bits.


> Objective-C is a strict superset of C, so it may be freely intermixed with C 
> code with few special considerations. Source files containing any Objective-C 
> would end in .m, whereas pure C would end in .c, but you can put whatever C 
> code you want into a .m file and it will be compiled as you'd expect. So for 
> a plug-in with a pure C application interface that can remain as normal, but 
> if you want to call Obj-C methods internally just make the source files .m 
> instead and link against the usual Cocoa frameworks, and it should work.
> 
> --Graham
> 

-- Jean-Daniel




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