Actually, no kext should be necessary if the device is HID compliant.
There is an option in the HID Manager that allows you to "seize" the
device when openend. This will allow your application to be the only
recipient of events.
- Rob
On Jan 12, 2005, at 7:40 AM, David Ferguson wrote:
First of all, trackballs are relative devices (they return delta
coordinates).
It should be possible, but this is not a common request/application.
You may want to contact Apple's DTS for help with the project.
I think you will need to write a kext that either works with your
specific trackballs in boot protocol, or somehow supplies some
different descriptors (such as a HID report descriptor), so you can
use the HID Manger to access the data from the device, but not treat
the data as input for the cursor.
Now it might be possible to gain exclusive access to the device
through the HID manager, and if so, that would be the most
straightforward approach -- you may want to investigate this on your
own, and if you can't do it, then follow the approaches listed above.
Regards,
David Ferguson
USB Software Team
Apple Computer
At 2:52 PM +0000 1/12/05, John Wood wrote:
Is it possible / easy to have one or more usb trackballs connected to
a mac independently from the gui. (i.e. they will have no effect on
the cursor position)
This is to get the raw x+y info from each into my application.
Thanks,
John
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