[Rubycocoa-talk] Ruby Callback to a C function

[Patrick G. <pge...@wa...>]

Hello,

I'm having trouble with my callback to CGEventTapCreate(). RubyCocoa  
says it cannot convert an argument, but I'm not sure if I'm using the  
right syntax for setting up the callback.

class ApplicationController < NSObject
	def applicationDidFinishLaunching (notification)
		tapPort = CGEventTapCreate(KCGSessionEventTap,
								KCGTailAppendEventTap,
								KCGEventTapOptionListenOnly,
								(1 << KCGEventMouseMoved),
								:myCallback,
								nil)
	end
	
	def	myCallback(proxy, type, event, refcon)
		print('CALLBACK')
		return	0
	end
end


Error:
2008-01-10 00:43:03.152 EventTap[190:10b]  
ApplicationController#applicationDidFinishLaunching:  
OSX::OCDataConvException: Cannot convert the argument #4 as '^? 
^{__CGEvent=}^{__CGEventTapProxy=}I^{__CGEvent=}^v' to Objective-C
	/Users/mini/Documents/xcode projects/Xcode build data/Release/ 
EventTap.app/Contents/Resources/ApplicationController.rb:17:in  
`CGEventTapCreate'
	/Users/mini/Documents/xcode projects/Xcode build data/Release/ 
EventTap.app/Contents/Resources/ApplicationController.rb:17:in  
`applicationDidFinishLaunching'
	/Users/mini/Documents/xcode projects/Xcode build data/Release/ 
EventTap.app/Contents/Resources/rb_main.rb:23:in `NSApplicationMain'
	/Users/mini/Documents/xcode projects/Xcode build data/Release/ 
EventTap.app/Contents/Resources/rb_main.rb:23
2008-01-10 00:43:03.158 EventTap[190:10b] Cannot convert the argument  
#4 as '^?^{__CGEvent=}^{__CGEventTapProxy=}I^{__CGEvent=}^v' to  
Objective-C


Thanks,
-Patrick