keyboard_keypressed(3) Svgalib User Manual keyboard_keypressed(3)

NAME
       keyboard_keypressed  -  check  if a key is pressed when in
       raw keyboard mode

SYNOPSIS
       #include <vgakeyboard.h>

       int keyboard_keypressed(int scancode);

DESCRIPTION
       When in raw keyboard mode this routine checks if  the  key
       with  scancode  is  pressed  and  returns  KEY_PRESSED  or
       KEY_NOTPRESSED accordingly. Actually KEY_PRESSED is 1  and
       KEY_NOTPRESSED is 0, s.t. you can use constructs like:

       if(keyboard_keypressed(SCANCODE_ENTER)) {
            /* do something */
       }

       Please  note  that  keyboard events will only be processed
       when you  occasionally  call  keyboard_update(3)  or  key-
       board_waitforupdate(3).

       keyboard_translatekeys(3)  allows certain remap operations
       which make certain keys (digits, enter) which  might  have
       several physical keys show up under the same scancodes.

       Here  are  the  supported  scancodes.  The  names  of  the
       #defines originate from the US keyboard layout, for  other
       countries,  they'll  refer to the key in the same physical
       location, but the keycap will have  a  different  inscrip-
       tion.  For  the  list below, add SCANCODE_ in front of the
       names to get the right name for your C source. That means,
       if  it lists BACKSLASH below, you shall use SCANCODE_BACK-
       SLASH as symbol in your program. In addition to the  names
       below  we also have SCANCODE_0 - SCANCODE_9, SCANCODE_KEY-
       PAD0 -  SCANCODE_KEYPAD9,  SCANCODE_A  -  SCANCODE_Z,  and
       SCANCODE_F1 - SCANCODE_F12.

       The  other  key names are ESCAPE, MINUS, EQUAL, BACKSPACE,
       TAB,  BRACKET_LEFT,  BRACKET_RIGHT,  ENTER,   LEFTCONTROL,
       SEMICOLON, APOSTROPHE, GRAVE, LEFTSHIFT, BACKSLASH, COMMA,
       PERIOD, SLASH, RIGHTSHIFT, KEYPADMULTIPLY, LEFTALT, SPACE,
       CAPSLOCK,  NUMLOCK,  SCROLLLOCK,  CURSORUPLEFT,  CURSORUP,
       CURSORUPRIGHT, KEYPADMINUS, CURSORLEFT, CURSORRIGHT,  KEY-
       PADPLUS, CURSORDOWNLEFT, CURSORDOWN, CURSORDOWNRIGHT, KEY-
       PADPERIOD, LESS, KEYPADENTER, RIGHTCONTROL, CONTROL,  KEY-
       PADDIVIDE,  PRINTSCREEN,  RIGHTALT,  BREAK, BREAK_ALTERNA-
       TIVE, HOME, CURSORBLOCKUP, PAGEUP,  CURSORBLOCKLEFT,  CUR-
       SORBLOCKRIGHT, END, CURSORBLOCKDOWN, PAGEDOWN, INSERT, and
       REMOVE.

SEE ALSO
       svgalib(7),   vgagl(7),   libvga(5),    keytest(6),
       eventtest(6),       keyboard_seteventhandler(3),      key-
       board_init(3),      keyboard_init_return_fd(3),       key-
       board_close(3),  keyboard_setdefaulteventhandler(3),  key-
       board_keypressed(3),     keyboard_clearstate(3),      key-
       board_translatekeys(3), keyboard_update(3), keyboard_wait-
       forupdate(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                         1