Hi Mark,

I think the following would work:

value =  valueOfAttribute attribute

point_ptr = Pointer.new(CGPoint.type)

AXValueGetValue( value, KAXValueCGPointType, point_ptr )

point = point_ptr[0]

Basically, you want to pass a pointer to a CGPoint to the API.

Laurent

On Dec 1, 2010, at 10:16 PM, Mark Rada wrote:

Hi,

With the recent closing of ticket #1002 I have been trying to take a bunch of Objective-C code and write it in MacRuby.

One problem that I have run into is with the AXValueGetValue() function in AXValue.h. The last argument to the function is supposed to be the address of a structure to populate; a fragment of that code would look like this:

AXValueRef value = (AXValueRef)[self valueOfAttribute:attribute];
CGPoint point;
AXValueGetValue( value, kAXValueCGPointType, &point );
return point;

If I wanted to write this in MacRuby I think I would have to do something like this:

value =  valueOfAttribute attribute
point = CGPoint.new
AXValueGetValue( value, KAXValueCGPointType, point.address_of )
point

Except that I have not come across a way to get the address of an object in MacRuby. I have tried the #object_id but then I get errors about the function wanting a Pointer.

Is there a way to get a pointer to a specific object or a way to get the address of an object?

Thanks,
Mark

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