[Drawkit] validateMenuItem:

[V1ru8]

Hi Graham,

Thank you very much for the detailed description!  And specially for  
the diagrams. they give me a much better understanding of the whole  
topic.
I tried all three ways you described. Overwriting  
makeControllerForView, adding the controller in the  
windowControllerDidLoadNib method (both are working properly) and  
subclassing DKDrawingView. But that doesn't work. Somehow (even if I  
just have an empty subclass) I get the following error message when I  
try to instantiate a new Document.

  *** -[NSRulerMarker  
initWithRulerView:markerLocation:image:imageOrigin:]: no image given.   
NSRulerMarkers must have an image.

It's not important for me right now but I'm interested what I'm doing  
wrong again ;-).

Regards,
Thomas