[MacRuby-devel] NSView.knowsPageRange( range )

[Laurent Sansonetti]

Hi Robert,

Can you try:

def knowsPageRange(range_ptr)
  range_ptr[0] = NSMakeRange(1, 1)
  true
end

This method is called with a pointer to an NSRange structure and you're supposed to set it to something in case you return true. In C, it would have been:

*range_ptr = NSMakeRange(1, 1)

Doing range[0].location=1 would do in C:

(*range_ptr).location = 1;

Which isn't what you want.

I don't know why range.location=1 was working in earlier versions of MacRuby. It should really be a Pointer object.

Laurent

On May 22, 2010, at 9:50 PM, Robert Rice wrote:

> I'm have some trouble understanding the new Pointer class. In older versions of MacRuby I used:
> 
> 	def knowsPageRange( range ) # Override pagination. Image my clip on some printers
> 		# The range is passed by reference.
> 		range.location = 1 # first page number
> 		range.length = 1
> 		true
> 	end
> 	
> MacRuby 0.6 gives me undefined method location= for the Pointer class. Adding an index eliminates the error but then my printing doesn't stop at one page:
> 
> 	def knowsPageRange( range ) # Override pagination. Image my clip on some printers
> 		# The range is passed by reference.
> 		range[0].location = 1 # first page number
> 		range[0].length = 1
> 		true
> 	end
> 
> How can I fix this?
> Thanks,
> Bob Rice
> 
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