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keyboard_translatekeys(3)     Svgalib User Manual    keyboard_translatekeys(3)


NAME

       keyboard_translatekeys - modify scancode mappings in raw keyboard mode


SYNOPSIS

       #include <vgakeyboard.h>

       void keyboard_translatekeys(int mask);


DESCRIPTION

       This function sets several flags which control how certain scancodes
       are mapped. At startup a mask value of 0 is active.

       mask must be a logical or of zero or more of the following #predefined
       integers to turn the features listed on:

       TRANSLATE_CURSORKEYS
              Translate the scancodes of the SCANCODE_CURSORBLOCK* keys to
              those of the cursor keys on the number pad, s.t.
              keyboard_getstate(3) and keyboard_keypressed(3) report a
              keypress of the corresponding number pad cursor key and not the
              one on the cursor block.

       TRANSLATE_DIAGONAL
              Translates the scancodes of diagonal cursor keys (keypad 7, 9,
              1, 3) to presses of two of the ordinary up, down, left, right
              keys. For example, instead of reporting a press of
              SCANCODE_CURSORUPRIGHT keyboard_getstate(3) and
              keyboard_keypressed(3) report a simultaneous press of
              SCANCODE_CURSORUP and SCANCODE_CURSORRIGHT.

       TRANSLATE_KEYPADENTER
              The scancode of the keypad enter key is mapped to that of the
              ordinary enter key, s.t.  keyboard_getstate(3) and
              keyboard_keypressed(3) report a press of SCANCODE_ENTER
              regardless if keypad enter or ordinary enter is pressed.

       DONT_CATCH_CTRLC
              Pressing <Ctrl>-C does not raise a SIGINT.  On contrary to the
              other flags this has also effect when a user defined keyboard
              event handler is used. Svgalib will always process <Alt>-F1 -
              <Alt>-F10 and perform console switches accordingly.


BUGS

       The TRANSLATE_* options above do really do simple scancode
       translations. For example, when TRANSLATE_KEYPADENTER is active and the
       user presses both enter and keypad enter. Then, if he releases one of
       them (say keypad enter), it's release event will clear the common
       keyboard state, s.t.  no keypress is reported even though enter is
       still pressed.

       Similarly, if TRANSLATE_DIAGONAL is active, the user holds cursor
       upleft (keypad 7) down and then presses and release cursor up (keypad
       8), svgalib will only report a pressed cursor left but the simulated
       cursor up will be lost. You can easily try this with the keytest(6)
       demo to make the effect more clear to you.


SEE ALSO

       svgalib(7), vgagl(7), libvga.config(5), keytest(6), eventtest(6),
       keyboard_seteventhandler(3), keyboard_init(3),
       keyboard_init_return_fd(3), keyboard_close(3), keyboard_update(3),
       keyboard_waitforupdate(3), keyboard_setdefaulteventhandler(3),
       keyboard_getstate(3), keyboard_clearstate(3), keyboard_keypressed(3),
       vga_waitevent(3)


AUTHOR

       This manual page was edited by Michael Weller <eowmob@exp-math.uni-
       essen.de>. The exact source of the referenced function as well as of
       the original documentation is unknown.

       It is very likely that both are at least to some extent are due to Harm
       Hanemaayer <H.Hanemaayer@inter.nl.net>.

       Occasionally this might be wrong. I hereby asked to be excused by the
       original author and will happily accept any additions or corrections to
       this first version of the svgalib manual.

Svgalib (>= 1.2.11)              29 July 1997        keyboard_translatekeys(3)

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