[MacRuby-devel] Getting a pointer to a boxed type

[Mark Rada]

Yup, that works!

Thanks, Laurent!


On 2010-12-02, at 1:39 AM, Laurent Sansonetti wrote:

> 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
>> 
>> _______________________________________________
>> MacRuby-devel mailing list
>> MacRuby-devel at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> 
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