Getting callback from OS X When does the Foucs application change?

Question

I am trying to find a way to write a "software sensor" in Java, running on Mac OS X (10.5), which records every application focus change.

My first idea was to write a “traction sensor” that uses Applescript, which simply returns the name of the application. it is in focus. Obviously this approach is not very good.

Therefore, I was wondering if it was possible to get a callback or some kind of notification directly from the operating system when another application gets into focus.

Thanks in advance! Cheers julian

Answer 1

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