How to map release of keys? Needed to use vim as braille-readyeditor

Hello,

Is it possible to map the keys "asdf hjkl" in insert-mode to be
registered if the key is released and not pressed? Is it possible to
collect all pressed keys until one of them will be released?

Example:
user presses and holds key "a" and key "f", if key "a" is released, the
mapped string will be "af ".

Example:
user presses "a", releases "a" and presses "f" and releases "f", the
mapped string will be "a f"

Is there an easy way to ignore order of key presses, so if the user
presses and holds key "a" and key "f" the mapped string will be "af "
and if user presses first "f" and then "a" the mapped sting will be "a f
" too?

Still exists there a vim-plugin to generate computer-braille?

Bye Andreas
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Andreas Romeyke
- Abteilung Blindenschrift -
Deutsche Zentralbücherei für Blinde zu Leipzig (DZB)
Gustav-Adolf-Straße 7, 04105 Leipzig
Tel: +49 341 7113-..., Fax: +49 341 7113-125
Internet: www.dzb.de
E-Mail: andreas.romeyke@dzb.de

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