[MacRuby] #1002: AXUIElement functions won't accept Pointers of type :id

[MacRuby]

#1002: AXUIElement functions won't accept Pointers of type :id
---------------------------+------------------------------------------------
 Reporter:  haxie1@…       |       Owner:  lsansonetti@…        
     Type:  defect         |      Status:  new                  
 Priority:  blocker        |   Milestone:  MacRuby 0.8          
Component:  MacRuby        |    Keywords:                       
---------------------------+------------------------------------------------

Comment(by lsansonetti@…):

 MacRuby will not let you create a void pointer, but it will let you pass
 any pointer as a void* argument. But here, the function accepts a void**
 pointer, so it's a different story.

 What you need to do is create a Pointer to void*, pass it to the API, then
 cast it back as a pointer to type id.

 {{{
 $ cat t.rb
 framework 'ApplicationServices'
 pid = 433
 safari =  AXUIElementCreateApplication(pid)
 titlePtr = Pointer.new('^v')
 err = AXUIElementCopyAttributeValue(safari, "AXTitle", titlePtr)
 titlePtr.cast!('@')
 p titlePtr[0]

 $ ./miniruby t.rb
 "Safari"
 }}}

 I am pondering if MacRuby shouldn't let you pass the :id pointer directly.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/1002#comment:3>
MacRuby <http://macruby.org/>