Re: listening for changes to active application

FROM : Jason Coco
DATE : Tue Oct 14 18:08:31 2008

On Oct 14, 2008, at 11:58 , Robert Nikander wrote:

> Hi,
>
> How can I be notified when the foreground application changes?  I 
> found "activeApplication" in NSWorkspace.  Is there a way to observe 
> changes to that property?  I tried the following, which doesn't seem 
> to work...
>
> [[NSWorkspace sharedWorkspace] addObserver:obs 
> forKeyPath:@"activeApplication" options: 0 context:NULL];
> // where obs implements...
> - (void)observeValueForKeyPath:ofObject:change:context:


You have to use the Carbon event manager to do this... there's no way 
to do it in Cocoa...