Re: [Rubycocoa-talk] RubyCocoa and alias_method_chain ?

[Satoshi N. <sna...@in...>]

Finally I have found a way.  Just include OCObjWrapper.
It seems due to an execution order.


require 'osx/cocoa'
require 'rubygems'
require 'active_support'

module OSX
   class CIImage
     include OCObjWrapper

     def method_missing_with_example(sym, *args, &block)
       method_missing_without_example(sym, *args, &block)
     end

     alias_method_chain :method_missing, :example
   end
end

original =3D
OSX::CIImage.imageWithContentsOfURL(
OSX::NSURL.fileURLWithPath('/Users/crafterm/Desktop/=20
leaves_desktop.jpg'))
p original.extent.size

--
Satoshi Nakagawa

On 2007/12/10, at 8:13, Satoshi Nakagawa wrote:

> I tried to solve this problem, but I cannot find a way to call the
> original OCObjWrapper#method_missing.  If you copy and paste the code
> in oc_wrapper.rb, it works well.
> Does anyone know a better way?
>
>
> require 'osx/cocoa'
> require 'rubygems'
> require 'active_support'
>
> module OSX
>   class CIImage
>     def method_missing_with_example(sym, *args, &block)
>       method_missing_without_example(sym, *args, &block)
>     end
>
>     def method_missing(mname, *args)
>       m_name, m_args, as_predicate =3D analyze_missing(mname, args)
>       begin
>         result =3D self.ocm_send(m_name, mname, as_predicate, *m_args)
>       rescue OCMessageSendException =3D> e
>         if self.private_methods.include?(mname.to_s)
>           raise NoMethodError, "private method `#{mname}' called for
> ##{self}"
>         else
>           raise e
>         end
>       end
>     end
>
>     alias_method_chain :method_missing, :example
>   end
> end
>
> original =3D
> OSX::CIImage.imageWithContentsOfURL(OSX::NSURL.fileURLWithPath('/=20
> Users/
> crafterm/Desktop/leaves_desktop.jp'))
> p original.extent.size
>
> --
> Satoshi Nakagawa
>
> On 2007/12/10, at 7:33, Satoshi Nakagawa wrote:
>
>> Hi,
>>
>> RubyCocoa defines Object.method_missing to realize a transparent
>> bridge between Ruby and Cocoa.  If you redefine method_missing of a
>> class, then=10=10=10=10=10=10 the class won't respond to any ObjC =
methods.  =20
>> That's
>> why alias_method_chain doesn't work.
>>
>> --
>> Satoshi Nakagawa
>>
>> On 2007/12/09, at 10:47, Marcus Crafter wrote:
>>
>>> Hi All,
>>>
>>> Hope all is going well!
>>>
>>> I'm trying to extend method_missing on OSX::CIImage using
>>> alias_method_chain and are having trouble getting it to work, here's
>>> an example to demonstrate it:
>>>
>>> require 'rubygems'
>>> require 'active_support'
>>> require 'osx/cocoa'
>>>
>>> module OSX
>>> class CIImage
>>>   def method_missing_with_example(sym, *args, &block)
>>>     method_missing_without_example(sym, *args, &block)
>>>   end
>>>
>>>   alias_method_chain :method_missing, :example
>>> end
>>> end
>>>
>>> original =3D
>>> OSX::CIImage.imageWithContentsOfURL(OSX::NSURL.fileURLWithPath('/
>>> Users/
>>> crafterm/Desktop/leaves_desktop.jpg'))
>>> puts original.extent.size
>>>
>>> When I run this I get:
>>>
>>> 	NoMethodError: undefined method =91extent=92 for =20
>>> #<OSX::CIConcreteImage:
>>> 0x117248c>
>>>
>>> If I comment out the call to alias_method_chain I get the expected
>>> result:
>>>
>>> 	#<OSX::CGSize:0x1173710>
>>>
>>> Somehow alias_method_chain breaks it. This is using Ruby & RubyCocoa
>>> as per a default install of Leopard, Rails 2.0.1 active support =20
>>> gems.
>>>
>>> Any thoughts what might be going on or what I could try to get it
>>> working?
>>>
>>> Cheers,
>>>
>>> Marcus
>
>
> =
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