keyboard_translatekeys(3) Svgalib User Manual keyboard_translatekeys(3)NAMEkeyboard_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_get‐
state(3) and keyboard_keypressed(3) report a keypress of the
corresponding number pad cursor key and not the one on the cur‐
sor 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_CUR‐
SORUPRIGHT keyboard_getstate(3) and keyboard_keypressed(3)
report a simultaneous press of SCANCODE_CURSORUP and SCAN‐
CODE_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_key‐
pressed(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 transla‐
tions. 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 ALSOsvgalib(7), vgagl(7), libvga.config(5), keytest(6), eventtest(6), key‐
board_seteventhandler(3), keyboard_init(3), keyboard_init_return_fd(3),
keyboard_close(3), keyboard_update(3), keyboard_waitforupdate(3), key‐
board_setdefaulteventhandler(3), keyboard_getstate(3), key‐
board_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)
