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Macruby: using ruby ​​method as AXObserverCallback

I am trying to follow the change of a textbox using macruby

.

AXObserverCreate

expects a parameter AXObserverCallback

. How do I pass a ruby ​​function as a callback?

My function in AX.m

:

+ (AXError) addNotificationWithElement: (AXUIElementRef) element
             forEvent:(CFStringRef) event_type
             callback:(AXObserverCallback) acallback;

This is how I want to call this method:

rb_main.rb

:

def my_callback *args
  p args
end

p AX.addNotificationWithElement ref,
                      forEvent:'AXValueChange',
                      callback: *** What to write here?***

What should I pass to my function addNotificationWithElement

that expects AXObserverCallback

as a callback parameter?

For reference: Apple Documentation forAXObserverCallback

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1 answer


You should be able to pass any Proc

(or lambda

) that takes the arguments given in the Apple documentation. In this case:

proc { |observer, element, notification, refcon| ... }

In your example, you can use the following (i.e. if the callback is a method):



proc { |*args| my_callback *args }

I haven't tested it where required AXObserverCallback

, but it seems to be a general pattern.

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