[MacRuby-devel] NSImage issue?

[Brad Wilson]

Sorry few typos in there, the only one that really matters is that the  
method call should be:

icon.drawInRect(rect, fromRect:NSZeroRect,  
operation:NSCompositeSourceOver, fraction:1.0)

On 13/11/2008, at 9:09 PM, Brad Wilson wrote:

> I think there's a problem with your method call. If you look at the  
> cocoa doc is has a selector with the signature:
> drawInRect:fromRect:operation:fraction.
>
> To call that from MacRuby you'd want to do something like:
> icon.drawInRect(rect, fromRect:NSZeroRect,  
> operationNSCompositeSourceOver, fraction:1.0.
>
> See the way the named arguments line up? That'll work for any cocoa  
> call. There's some discussion on the MacRuby tutorial under "Sending  
> Messages" at http://www.macruby.org/trac/wiki/MacRubyTutorial
>
>
> Another tip I got from somebody on the list:
> object.methods(true, true) will give you a list of all methods on an  
> object, including objective-c methods. That might help in future if  
> you're not sure what the method call should be.
>
> Hope that helps.
>
> Brad
>
>
> On 13/11/2008, at 8:11 PM, pedro gutierrez wrote:
>
>> Hi everybody,
>>
>> This is my first message to the mailing list, I am a newbie in  
>> Cocoa so please bear with me...
>>
>> In my first serious MacRuby project,  I have subclassed  
>> NSTextFieldCell and I have redefined drawInteriorWithFrame with the  
>> following code:
>>
>> 	def drawInteriorWithFrame( rect, inView:view )
>> 		
>> 		icon = NSImage.imageNamed( "example" )
>> 		
>> 		puts icon.methods.join( " " )
>> 		puts "icon is valid: #{icon.isValid} and has size #{icon.size}"
>> 		
>> 		icon.drawInRect( rect, NSZeroRect, NSCompositeSourceOver, 1.0 )
>> 	
>> 	end
>>
>> (i.e: I am just trying to draw an icon)
>>
>> Here is what I get from the console:
>>
>> [Session started at 2008-11-13 09:01:01 +0000.]
>> gem __super_objc_send__ enum_for to_enum object_id __id__  
>> define_singleton_method public_method method display extend  
>> respond_to? public_send send __send__ instance_exec instance_eval  
>> __native__? tap is_a? kind_of? instance_of?  
>> instance_variable_defined? instance_variable_set  
>> instance_variable_get instance_variables public_methods  
>> private_methods protected_methods singleton_methods methods inspect  
>> to_s frozen? freeze untaint tainted? taint dup clone eql? !~ =~ ===  
>> nil? != ! equal? == hash
>> icon is valid: true and has size #<NSSize width=30.0 height=24.0>
>> /Users/sicozu/Projects/iAmbient/build/Release/iAmbient.app/Contents/ 
>> Resources/PlaylistCell.rb:26:in `drawInteriorWithFrame:inView:':  
>> undefined method `drawInRect' for #<NSImage:0x10f2480>  
>> (NoMethodError)
>> 	from /Users/sicozu/Projects/iAmbient/build/Release/iAmbient.app/ 
>> Contents/Resources/PlaylistCell.rb:15:in `drawWithFrame:inView:'
>> 	from /Users/sicozu/Projects/iAmbient/build/Release/iAmbient.app/ 
>> Contents/Resources/PlaylistCell.rb:15:in `drawWithFrame:inView:'
>> 	from /Users/sicozu/Projects/iAmbient/build/Release/iAmbient.app/ 
>> Contents/Resources/rb_main.rb:22:in `NSApplicationMain'
>> 	from /Users/sicozu/Projects/iAmbient/build/Release/iAmbient.app/ 
>> Contents/Resources/rb_main.rb:22:in `<main>'
>>
>> Can anybody please give me a hint of what I am doing wrong?  
>> Shouldn't I expect my instance of NSImage to respond to :drawInRect?
>>
>> And by the way,  thanks a lot for this sweet MacRuby project !!
>> Cheers,
>> Pedro.
>>
>>
>> _______________________________________________
>> MacRuby-devel mailing list
>> MacRuby-devel at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>
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