[Rubycocoa-talk] Custom NSFormatter Problem

[Chris S. <chr...@tr...>]

Hello I am trying to make a new Custom OSX::NSFormatter.  I have read  
the Objective-c documentation and I believe that the class below  
should work:

Code:
require 'osx/cocoa'

class TotalTimeFormatter < OSX::NSFormatter

	def stringForObjectValue(anObject)
		OSX::NSLog("TotalTimeFormatter(stringForObjectValue): Passed Object - 
 > %@ (%@)", anObject, anObject.class)
		return anObject.to_s();
	end

	#ib_action :commitCurrentTimeRecord do |sender|
	def getObjectValue_forString_errorDescription(anObject, string, error)
		 
OSX 
::NSLog 
("TotalTimeFormatter(getObjectValue_forString_errorDescription):  
Passed Object -> %@ (%@)", anObject, anObject.class)
		return anObject.to_s();
	end
	
	#ib_action :commitCurrentTimeRecord do |sender|
	def attributedStringForObjectValue_withDefaultAttributes(anObject,  
attributes)
		 
OSX 
::NSLog 
("TotalTimeFormatter 
(attributedStringForObjectValue_withDefaultAttributes): Passed Object - 
 > %@ (%@) ", anObject, anObject.class)
		return anObject.to_s();
	end
end


When running the app I get the following error in the log:

2008-01-10 12:43:51.117 TicTocRuby[1928:10b]  
TotalTimeFormatter 
(attributedStringForObjectValue_withDefaultAttributes): Passed Object - 
 > 1146 (NSCFNumber)
2008-01-10 12:43:51.121 TicTocRuby[1928:10b]  
TotalTimeFormatter 
(attributedStringForObjectValue_withDefaultAttributes): Passed Object - 
 > 1146 (NSCFNumber)
2008-01-10 12:43:51.126 TicTocRuby[1928:10b] *** -[NSCFString  
attribute:atIndex:longestEffectiveRange:inRange:]: unrecognized  
selector sent to instance 0xa0b5f8f4
/Users/chris/TicTocRuby/build/Debug/TicTocRuby.app/Contents/Resources/ 
rb_main.rb:22:in `NSApplicationMain': NSInvalidArgumentException - ***  
-[NSCFString attribute:atIndex:longestEffectiveRange:inRange:]:  
unrecognized selector sent to instance 0xa0b5f8f4 (OSX::OCException)
	from /Users/chris/TicTocRuby/build/Debug/TicTocRuby.app/Contents/ 
Resources/rb_main.rb:22


I have played around with this and it seems the only way I can have  
this class working correctly is to return a blank string using the  
following syntax, but this returns a blank string:

return OSX::NSString.alloc.init

If I try the following I get the same error:

return OSX::NSString.alloc.initWithString("Hello World")


I have looked over the documentation and I can't find any reference to  
that error.  Any help would be much appreciated.

Thanks In Advance!!!