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.
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