Re: OT Braille Displays (was :How to map release of keys? Needed to use vim as braille-readyeditor)

On 07/02/2010 08:28 AM, Tony Mechelynck wrote:
> Or else you could use a Braille font, with one six-dot glyph (well, six
> dots, each of which may be present or absent) for each character... but
> apparently I can't find it back. Maybe write (if it doesn't yet exist) a
> keymap from Latin to the Braille patterns at Unicode codepoints U+2800
> to U+28FF? See
> http://www.unicode.org/charts/PDF/U2800.pdf
> http://vim.wikia.com/wiki/How_to_make_a_keymap
> and the help topics mentioned at the top of the latter.
>
> Hm, I thought Braille patterns were made of six dots each (as at U+2800
> to U+283F) but there they go on to eight dots...

The classic version had 6 dots, but there's an extended version
with 8 (two extra at the bottom) that allows for a greater number
of character varniants.

> To read the text, ISTR that keyboards "for blind people" exist, which
> include a Braille display (one line of Braille, or maybe a few lines),
> so that it can be read by touch, instead of a "visual" screen, by
> someone who knows Braille...

It sounds like you're describing a "refreshable Braille display"

https://secure2.convio.net/psb/images/content/pagebuilder/seika_pc_lg.jpg

which tends to look a bit like one of those gel wrist-rests for
keyboards with a 40 or 80-cell tactile display. Some of them
also include a 6-key or 8-key Braille input

http://www.afb.org/afbpress/Image.asp?ImageID=aw050305f1

which is a common means for entering text.

-tim

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