On Wed, Jun 24, 2009 at 4:52 PM, Andreas Raab <andreas.raab at gmx.de> wrote:

> Michael van der Gulik wrote:
>
>> On a random Windows VM I just found, I get even more interesting results:
>>
>> #(2 14856453 72 1 0 72 0 0)
>> #(2 14856453 104 0 0 104 0 0)
>> #(2 14856500 72 2 0 72 0 0)
>>
>> The character changes. I typed in a lower case 'h', but the VM returns an
>> upper-case 'H' (72) as the press and release field character, and a lower
>> case 'h' (104) in the character field.
>>
>> Why?
>>
>
> Look at your keyboard. Real close. What does the letter that is printed on
> the keyboard say? Does it say "h" or does it say "H"? ;-)
>
> When you press the "H" key (as it is denoted on your keyboard) the VM
> reports this as the "H" key which is then interpreted by Windows to be the
> lowercase "h" character, which it reports as well. Similarly, if you would
> press Shift-H, it would report that you pressed the shift key, the "H" key
> which then resulted in the uppercase "H" character. Makes sort of sense
> dunnit? ;-)


Not any more :-). I found this:
http://www.win.tue.nl/~aeb/linux/kbd/scancodes-14.html

I think that using the USB scan codes would make more sense. It's a
"standard", although so far I've only found Microsoft to be declaring it as
such. I haven't investigated finding out if X11, Win32 and the Macintosh
APIs allow you access to them directly, but if they don't, I can still
convert the VM's "characters" for the key press and key release events to
this standard. Using this "standard" means that the VM's input events are
the same across all platforms.

I think I'm satisfied that the scancodes are the same across the vast
majority of modern keyboards around the world. There seems to be two types
of hardware keyboards being made: a US one and a European one. The rest of
the world's keyboards seem to be one of these two models with different
printing on them. Let me know if this assumption is wrong.

International keyboard mappings:
http://msdn.microsoft.com/en-gb/goglobal/bb964651.aspx

Gulik.

-- 
http://gulik.pbwiki.com/
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