How to create secondary Thread that listens to event taps?
How to create secondary Thread that listens to event taps?
- Subject: How to create secondary Thread that listens to event taps?
- From: eveningnick eveningnick <email@hidden>
- Date: Sun, 17 Oct 2010 20:25:02 +0300
I have an application that has to perform a long action and while
performing it, be able to react to pressing "Esc" and cancel that long
operation.
That "long action" is a series of Applescript calls. If i perform
these calls in NSOperation's -main function the speed significantly
decreases - i guess this is because of NSAppleScript's implementation
that operates with main runloop.
So, i decided to do the following - i will execute the "long action"
in a main thread, and create an "Esc-listening thread" that will
install a system-wide keyboard EventTap (which watches ESC presses,
and if it gets any, it rises the cancellation flag - this flag is
periodically checked in the main thread's "long alhorithm").
The thing i can't understand - is how to make that secondary thread to
have a run loop, and how to make it not to finish as soon as i have
created it - but to watch its own run loop for "event taps"'s events.
Most tutorials are about putting "long operations" into the secondary
thread, but what i am trying to achieve - is to put the "run loop" in
it.
How could it be done?
P.S. i need a system wide hook, because the idea of the application is
to react on keypresses in several applications, so this is the best
idea for me
Thanks!
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