Re: [Rubycocoa-talk] Ruby Callback to a C function

[Laurent S. <lsa...@ap...>]

Bonjour Patrick,

Try passing a proc object for the callback parameter instead:

myCallback = proc do |proxy, type, event, refcon|
	puts 'CALLBACK'
	0
end
tapPort = CGEventTapCreate(
	KCGSessionEventTap,
	KCGTailAppendEventTap,
	KCGEventTapOptionListenOnly,
	(1 << KCGEventMouseMoved),
	myCallback,
	nil)

Laurent

On Jan 10, 2008, at 12:49 AM, Patrick Geiller wrote:

> 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
>
>
>
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