On 2010-10-24, at 9:34 PM, Laurent Sansonetti wrote:
> Hi Mark,
>
> Matt already replied but I thought I would give more info.
>
> On Oct 23, 2010, at 10:04 PM, Mark Rada wrote:
>
>> Hi,
>>
>> I've been trying to play with using the Accessibility API to do some
>> automated testing.
>>
>>> From what I have researched, I have to use some C functions that often need
>>> a reference passed to the them.
>>
>> I am at a loss when trying to deal with Pointer objects. I've tried playing
>> with them and googling it, but I just cannot figure out how to turn a
>> pointer into a more useful type or to get what I want out of them.
>>
>> For example, I can start like this:
>>
>> framework 'Cocoa'
>>
>> unless AXAPIEnabled() # only works if I include the parenthesis
>> puts 'Please enable Access for Assistive Devices first'
>> exit 2
>> end
>
> That's expected, in Ruby methods starting with a capital letter must be
> called with explicit parentheses, otherwise they are interpreted as constants.
Ah, that makes more sense now.
>
>> mail =
>> NSRunningApplication.runningApplicationsWithBundleIdentifier('com.apple.Mail').first
>> mail_object = AXUIElementCreateApplication mail.processIdentifier
>>
>> names = Pointer.new :object
>>
>> AXUIElementCopyAttributeNames mail_object, names
>>
>>
>> But then how do I get the values out of the names pointer? For reference, I
>> found the functions in AXUIElement.h.
>
>
> It looks like AXUIElementCopyAttributeNames returns a CFArray by reference.
> So your pointer object is properly created, to retrieve the array after the
> call you just use
>
> array = names[0]
>
> Then, it should behave like a normal Ruby array.
Ah, that does work, and seems to have worked for a number of other things I am
trying to do.
The only problem now is when I have something like
value = Pointer.new '^v' # pointer to pointer to void
AXUIElementCopyAttributeValue mail_object, 'AXHidden', value
In this case I am using it right now, it will be returning a boolean, but when
I try to dereference it like
puts value[0][0] # => 120
it gives me a Fixnum, and then I can keep trying things like
puts value[0][1] # => 104
puts value[0][10000] # => 0
And I seem to get nowhere.
Is there a way to cast the data back into the type I want it to be? Or am I
doing something dumb?
Thanks,
Mark
>
> Laurent
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