On Oct 21, 2010, at 3:31 PM, eveningnick eveningnick wrote:
> In some moments i find out (using application ET Testbench) that my
> active event tap is disabled (when i have not called CGDisableEventTap
> nowhere!). I am pretty sure, i am not calling
> CGEventTapEnable(myactivetap, NO) nowhere else, except when my app
> finishes.
>
> What could cause that behavior?
The event taps documentation ("Quartz Event Services Reference," if I recall
correctly) explains that the system automatically disables an event tap
whenever the system determines that the event tap is slowing the system down.
When this happens, you receive a special notification, and from the
notification you can tell whether the event tap was disabled by the user or by
the system. Your program should normally respond to the system disabled event
by re-enabling the event tap, but other strategies are possible.
Any software that makes use of event taps should include a routine to watch for
the system disabled event, so that you can re-enable the event tap immediately
and avoid losing functionality.
--
Bill Cheeseman - [email protected]
_______________________________________________
Cocoa-dev mailing list ([email protected])
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to [email protected]
