Re: Querying the front application

FROM : wadeslists
DATE : Sun Jul 09 10:15:43 2006

>> Is there a currently recommended way for a Cocoa app to register 
>> for a notification or something when the front-most application 
>> changes?
>>
>> After that's done, how could one query what application is now the 
>> front-most?
>>
>> I have a need to write a simple faceless utility that only does 
>> its thing when a particular application is in the foreground.


You could also use the Accessibility API.  The documentation is 
pretty scattered on it, but http://developer.apple.com/documentation/
Accessibility/Reference/AccessibilityLowlevel/index.html seems to be 
the right place to start.  It uses a pretty familiar notifcation-
observer model; you can register for application activated/
deactivated notifications, and other such things.  Parameters 
provided in the notifications presumably include the application in 
question.  I've not used it myself though, so I couldn't tell you any 
more.

Wade Tregaskis

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