"Capturing" a keyboard-like device in a Cocoa application?
"Capturing" a keyboard-like device in a Cocoa application?
- Subject: "Capturing" a keyboard-like device in a Cocoa application?
- From: Chris Hanson <email@hidden>
- Date: Tue, 15 Apr 2003 13:20:41 -0500
I'm working on a Cocoa desktop application that's Jaguar-only. I'm
running into an issue I think the HID Manager might be able to help
me with. I'm not sure though, so I'd like to get some input from the
community.
In my application, there's a window for user input where the user can
type information in a variety of fields. Some users may also use an
alternative USB input device that emulates a keyboard to enter
information. However, I need to treat input from this alternative
input device specially, and populate particular fields with the input
the device sends.
Specifically: The device sends normal "keystrokes" for user input,
and ends its input with return keystrokes. Some of the keystrokes it
sends should go in some fields, some in other fields, and the returns
it sends should *not* activate the window's default button. But
whenever the user types on an actual keyboard, the input should go
into the field that has the input focus, just like normal, and when
the user presses return or enter on an actual keyboard it should
activate the window's default button, just like normal.
The alternative input devices will all be the same model from the
same manufacturer, so I can hard-code the USB vendor and product ID
into my application if necessary.
Will it be both possible and straightforward to use HID Manager to
somehow "capture" this alternative input device and process its input
specially, and therefore have its input *not* routed through the
Cocoa input mechanism?
Or is there some other technology or mechanism I can use to accomplish my goal?
-- Chris
--
Chris Hanson, bDistributed.com, Inc. | Email: email@hidden
Custom Application Development | Phone: +1-847-372-3955
http://bdistributed.com/ | Fax: +1-847-589-3738
http://bdistributed.com/Articles/ | Personal Email: email@hidden
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