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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  keyboard_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
       inscription. 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_BACKSLASH as symbol in your program. In
       addition to the names below we also have SCANCODE_0 - SCANCODE_9,
       SCANCODE_KEYPAD0 - 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,  KEYPADPLUS,  CURSORDOWNLEFT,  CURSORDOWN,
       CURSORDOWNRIGHT,  KEYPADPERIOD,  LESS,  KEYPADENTER,  RIGHTCONTROL,
       CONTROL,  KEYPADDIVIDE,  PRINTSCREEN,  RIGHTALT,  BREAK,
       BREAK_ALTERNATIVE,  HOME,  CURSORBLOCKUP,  PAGEUP,  CURSORBLOCKLEFT,
       CURSORBLOCKRIGHT,  END,  CURSORBLOCKDOWN,  PAGEDOWN,  INSERT, and
       REMOVE.

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_setdefaulteventhandler(3), keyboard_keypressed(3),
       keyboard_clearstate(3), keyboard_translatekeys(3), keyboard_update(3),
       keyboard_waitforupdate(3), vga_waitevent(3)

AUTHOR
       This manual page was edited by Michael Weller <[email protected]
       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 <[email protected]>.

       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_keypressed(3)
Command Section