Re: Converting HID keyboards usages to characters ?
Re: Converting HID keyboards usages to characters ?
- Subject: Re: Converting HID keyboards usages to characters ?
- From: Jean-Daniel Dupas <email@hidden>
- Date: Thu, 19 Jun 2008 11:14:24 +0200
Le 19 juin 08 à 10:32, Fred Leboucher a écrit :
Hi,
I'm trying to do something that was discussed before in the Carbon
lists :
convert a HID keyboard usage to a unicode character, with the
current modifier
keys applied, and using the system-wide selected keyboard layout.
This technical note from Apple
(http://developer.apple.com/technotes/tn2002/tn2056.html) details
the file
formats available for keyboard layouts, but there's no information
about the way
to:
- get info about the currently selected one
- a method to convert a key code to a unicode char (parsing the
whole XML file
and doing the conversion by hand would be quite nasty, assuming that
you even
know how to do the first step: know what layout is to be used)
Anyone knows how to do that ?
Thanks for your help
Fred
Use UCKeyTranslate().
http://developer.apple.com/documentation/Carbon/Conceptual/Supporting_Unicode_Input/sui_tasks/chapter_3_section_4.html
Note that before Leopard, some keyboard layouts (French for example)
does not have uchr ressources and uses the deprecated KCHR format
instead. On Leopard, only some third party keyboard layouts use KCHR.
In thoses cases, you will not able to use UCKeyTranslate(), but need
to fallback to KeyTranslate() instead.
To retreive the current keyboard layout:
- The new way (Leopard), Text Input Source Services ( http://developer.apple.com/documentation/TextFonts/Reference/TextInputSourcesReference/Reference/reference.html
).
- The old way, Keyboard layout services ( http://developer.apple.com/documentation/Carbon/Reference/KeyboardLayoutServices/Reference/reference.html
).
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