Re: Apple Remote and exclusivity

FROM : Ilan Volow
DATE : Tue Jun 03 23:17:48 2008

There's been some changes to device seizing in Leopard. I've had some 
code of my own (albeit keyboard/barcode scanner stuff) that's been 
affected by it.

http://developer.apple.com/technotes/tn2007/tn2187.html

I'd think that the Apple remote wouldn't be affected (unless it's 
being interpreted as some kind of really tiny infra-red keyboard), but 
it's something to keep in mind.

-- Ilan

On Jun 2, 2008, at 3:44 PM, Elan Feingold wrote:

> Hi,
>
> The app I'm working on makes use of the Apple Remote; specifically, 
> it runs a helper app (daemon) so that the app can be started with a 
> press of the Apple Remote Menu button, and then passes key presses 
> it receives to the app via UDP messages.
>
> I'm seeing two issues:
>
> 1) Even though I open the device with kIOHIDOptionsTypeSeizeDevice, 
> I'm seeing times where it seems to lose exclusivity. I can't pin it 
> to any specific event (i.e. wake from sleep, etc.), but it 
> definitely seems to lose it after a period of time (hours, days). 
> After that hitting the Menu button brings up both the application 
> *and* Front Row, which is not exactly optimal :-)
>
> I read somewhere that if an application loses focus and then regains 
> it, it should reopen the device to assure exclusivity. I'm not sure 
> how this would work with a daemon that doesn't ever have focus in 
> the application sense.
>
> 2) I'm seeing cases where key-presses on the Apple Remote are lost. 
> It might be correlated with the actual application using a bit more 
> CPU. I'm not sure if the process doing the Apple Remote reception 
> needs to be run at a higher priority?
>
> Any help you could offer would be much appreciated!
>
> Thanks,
>
> -elan
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