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Re: Catching a click during a loop

I have a program with a rather lengthy process, and I would like to be able to click cancel and have the operation canceled. This process is preformed within a while loop. I have tried running it in a new thread, I have tried the runUntilDate and neither seems to allow my cancel button to be clicked (You click and nothing happens.)

If your process is executing in a while loop on the main thread, then you are blocking the run loop and events are not dispatched. You might be able to fetch the events and dispatch them yourself, but a better solution would be to run the process in a separate thread. The button click would caused a method to be executed on the main thread. That method could signal a stop on the second thread (perhaps via an NSConditionLock). The process thread would periodically check the lock and stop execution when it changes.
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References: 
 >Catching a click during a loop (From: Mark Williams <email@hidden>)
 >Re: Catching a click during a loop (From: Cameron Hayne <email@hidden>)
 >Re: Catching a click during a loop (From: Mark Williams <email@hidden>)
 >Re: Catching a click during a loop (From: Mark Williams <email@hidden>)



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