rubycocoa-talk

[Rubycocoa-talk] Comparing to OSX::NSDragOperationDelete

[Tom C. <ta...@ca...>]

Hello

I have a feeling this is a stupid question, but I just can't figure  
it out.

I have created a subclass of an NSOutlineView in order to implement  
drag to trash.  Everything works fine, except that the operation  
variable passed by Cococa to the method  
draggedImage_endedAt_operation isn't one of the OSX::NSDragOperation  
constants:

# Method described at http://developer.apple.com/documentation/Cocoa/ 
Reference/ApplicationKit/ObjC_classic/Protocols/NSDraggingSource.html
def draggedImage_endedAt_operation( animage, apoint, operation )
       OSX::NSLog "Trying to delete? #{operation.inspect} # 
{OSX::NSDragOperationDelete}"
       OSX::NSLog("Is a delete operation") if operation ==  
OSX::NSDragOperationDelete
   end

Whereas the OSX::NSDragOperationDelete constant is always the Fixnum  
32, the operation returned is a Bignum with a variety of values.

What am I missing? Why can't I compare the returned operation with  
the constant?

Thanks

Tom

Re: [Rubycocoa-talk] Comparing to OSX::NSDragOperationDelete

[kimura wataru<ki...@us...>]

Hi,

I think method "draggingSourceOperationMaskForLocal:" of protocol
NSDraggingSource is missing.

http://www.cocoabuilder.com/archive/message/cocoa/2005/8/3/143456

Tom Counsell wrote:
>Hello
>
>I have a feeling this is a stupid question, but I just can't figure  
>it out.
>
>I have created a subclass of an NSOutlineView in order to implement  
>drag to trash.  Everything works fine, except that the operation  
>variable passed by Cococa to the method  
>draggedImage_endedAt_operation isn't one of the OSX::NSDragOperation  
>constants:
>

>Whereas the OSX::NSDragOperationDelete constant is always the Fixnum  
>32, the operation returned is a Bignum with a variety of values.
>
>What am I missing? Why can't I compare the returned operation with  
>the constant?
>


RubyCocoa gets arguments' type of informal protocol from a class
DummyProtocolHandler. I wondered a bug in this process. I tested 
the method draggedImange:endedAt:operation: and got fine result.

------
% cat dnd.rb
require 'osx/cocoa'

class DraggingSource < OSX::NSObject
  def draggedImage_endedAt_operation( animage, apoint, operation )
    raise "error #{operation}" unless operation == OSX::NSDragOperationDelete
    nil
  end
end

drag = DraggingSource.alloc.init
drag.ocm_send('draggedImage:endedAt:operation:', nil, [0,0], OSX::NSDragOperationDelete)

% ruby -d dnd.rb
    :
  2005-11-23 12:59:25.195 ruby[12834] RBOBJ:methodSignatureForSelector(draggedImag
  e:endedAt:operation:)
  2005-11-23 12:59:25.196 ruby[12834] RBOBJ:   --> NSMethodSignature: types=v@:@{_
  NSPoint=ff}I nargs=5 sizeOfParams=160 returnValueLength=0; 
  2005-11-23 12:59:25.196 ruby[12834] OBJWRP:ocm_invoke (draggedImage:endedAt:oper
  ation:): ret_type=v
* 2005-11-23 12:59:25.196 ruby[12834] OBJWRP:    arg_type[0]: @
* 2005-11-23 12:59:25.196 ruby[12834] OBJWRP:    arg_type[1]: {_NSPoint=ff}
* 2005-11-23 12:59:25.197 ruby[12834] OBJWRP:    arg_type[2]: I
* 2005-11-23 12:59:25.197 ruby[12834] OBJWRP:    NSInvocation#invoke (draggedImage
  :endedAt:operation:) ...
  2005-11-23 12:59:25.197 ruby[12834] RBOBJ:methodSignatureForSelector(draggedImag
  e:endedAt:operation:)
    :
------


-- 
kimura wataru