1keyboard_keypressed(3)        Svgalib User Manual       keyboard_keypressed(3)
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NAME

6       keyboard_keypressed  -  check  if a key is pressed when in raw keyboard
7       mode
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SYNOPSIS

10       #include <vgakeyboard.h>
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12       int keyboard_keypressed(int scancode);
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DESCRIPTION

16       When in raw keyboard mode this routine checks if the key with  scancode
17       is pressed and returns KEY_PRESSED or KEY_NOTPRESSED accordingly. Actu‐
18       ally KEY_PRESSED is 1 and KEY_NOTPRESSED is 0, s.t. you  can  use  con‐
19       structs like:
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21       if(keyboard_keypressed(SCANCODE_ENTER)) {
22            /* do something */
23       }
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25       Please  note that keyboard events will only be processed when you occa‐
26       sionally call keyboard_update(3) or keyboard_waitforupdate(3).
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28       keyboard_translatekeys(3) allows certain remap  operations  which  make
29       certain  keys  (digits,  enter)  which might have several physical keys
30       show up under the same scancodes.
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32       Here are the supported scancodes. The names of the  #defines  originate
33       from  the US keyboard layout, for other countries, they'll refer to the
34       key in the same physical location, but the keycap will have a different
35       inscription. For the list below, add SCANCODE_ in front of the names to
36       get the right name for your C source. That means, if it lists BACKSLASH
37       below,  you  shall use SCANCODE_BACKSLASH as symbol in your program. In
38       addition to the names below we also have SCANCODE_0 - SCANCODE_9, SCAN‐
39       CODE_KEYPAD0  -  SCANCODE_KEYPAD9,  SCANCODE_A  - SCANCODE_Z, and SCAN‐
40       CODE_F1 - SCANCODE_F12.
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42       The  other  key  names  are  ESCAPE,  MINUS,  EQUAL,  BACKSPACE,   TAB,
43       BRACKET_LEFT, BRACKET_RIGHT, ENTER, LEFTCONTROL, SEMICOLON, APOSTROPHE,
44       GRAVE, LEFTSHIFT, BACKSLASH, COMMA, PERIOD, SLASH, RIGHTSHIFT,  KEYPAD‐
45       MULTIPLY,  LEFTALT, SPACE, CAPSLOCK, NUMLOCK, SCROLLLOCK, CURSORUPLEFT,
46       CURSORUP, CURSORUPRIGHT, KEYPADMINUS, CURSORLEFT, CURSORRIGHT,  KEYPAD‐
47       PLUS,  CURSORDOWNLEFT, CURSORDOWN, CURSORDOWNRIGHT, KEYPADPERIOD, LESS,
48       KEYPADENTER, RIGHTCONTROL, CONTROL,  KEYPADDIVIDE,  PRINTSCREEN,  RIGH‐
49       TALT,  BREAK,  BREAK_ALTERNATIVE,  HOME, CURSORBLOCKUP, PAGEUP, CURSOR‐
50       BLOCKLEFT, CURSORBLOCKRIGHT, END,  CURSORBLOCKDOWN,  PAGEDOWN,  INSERT,
51       and REMOVE.
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SEE ALSO

55       svgalib(7),  vgagl(7), libvga.config(5), keytest(6), eventtest(6), key‐
56       board_seteventhandler(3), keyboard_init(3), keyboard_init_return_fd(3),
57       keyboard_close(3),   keyboard_setdefaulteventhandler(3),  keyboard_key‐
58       pressed(3),  keyboard_clearstate(3),  keyboard_translatekeys(3),   key‐
59       board_update(3), keyboard_waitforupdate(3), vga_waitevent(3)
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AUTHOR

63       This  manual  page  was  edited by Michael Weller <eowmob@exp-math.uni-
64       essen.de>. The exact source of the referenced function as  well  as  of
65       the original documentation is unknown.
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67       It is very likely that both are at least to some extent are due to Harm
68       Hanemaayer <H.Hanemaayer@inter.nl.net>.
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70       Occasionally this might be wrong. I hereby asked to be excused  by  the
71       original author and will happily accept any additions or corrections to
72       this first version of the svgalib manual.
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76Svgalib (>= 1.2.11)              29 July 1997           keyboard_keypressed(3)
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