1keyboard_seteventhandler(3) Svgalib User Manual keyboard_seteventhandler(3)
2
6 keyboard_seteventhandler, keyboard_setdefaulteventhandler - define an
7 event handler for keyboard events in raw mode
8
10 #include <vgakeyboard.h>
11 typedef void (*__keyboard_handler) (int scancode, int press);
13 void keyboard_seteventhandler(__keyboard_handler handler);
15 void keyboard_setdefaulteventhandler(void);
16
19 These functions allow to define a keyboard event handler which is
20 called by keyboard_update(3) and keyboard_waitforupdate(3) when a key‐
21 board event occured.
22 press is KEY_EVENTRELEASE or KEY_EVENTPRESS if key scancode was
24 released or pressed. Actually the first value is 0 and the second is 1
25 which are so intuitive s.t. you may use them in your program.
26 Even you specify an own handler, svgalib will check for <Alt>-F* or
28 <Ctrl>-C for console switches or generation of SIGINT if allowed by
29 keyboard_translatekeys(3).
30 Calling keyboard_setdefaulteventhandler() reinstates the default han‐
32 dler which maintains the tables used by keyboard_getstate(3) and key‐
33 board_keypressed(3). It is probably a good idea to call key‐
34 board_clearstate(3) after reenabling the default handler.
35 Here are the supported scancodes. The names of the #defines originate
37 from the US keyboard layout, for other countries, they'll refer to the
38 key in the same physical location, but the keycap will have a different
39 inscription. For the list below, add SCANCODE_ in front of the names to
40 get the right name for your C source. That means, if it lists BACKSLASH
41 below, you shall use SCANCODE_BACKSLASH as symbol in your program. In
42 addition to the names below we also have SCANCODE_0 - SCANCODE_9, SCAN‐
43 CODE_KEYPAD0 - SCANCODE_KEYPAD9, SCANCODE_A - SCANCODE_Z, and SCAN‐
44 CODE_F1 - SCANCODE_F12.
45 The other key names are ESCAPE, MINUS, EQUAL, BACKSPACE, TAB,
47 BRACKET_LEFT, BRACKET_RIGHT, ENTER, LEFTCONTROL, SEMICOLON, APOSTROPHE,
48 GRAVE, LEFTSHIFT, BACKSLASH, COMMA, PERIOD, SLASH, RIGHTSHIFT, KEYPAD‐
49 MULTIPLY, LEFTALT, SPACE, CAPSLOCK, NUMLOCK, SCROLLLOCK, CURSORUPLEFT,
50 CURSORUP, CURSORUPRIGHT, KEYPADMINUS, CURSORLEFT, CURSORRIGHT, KEYPAD‐
51 PLUS, CURSORDOWNLEFT, CURSORDOWN, CURSORDOWNRIGHT, KEYPADPERIOD, LESS,
52 KEYPADENTER, RIGHTCONTROL, CONTROL, KEYPADDIVIDE, PRINTSCREEN, RIGH‐
53 TALT, BREAK, BREAK_ALTERNATIVE, HOME, CURSORBLOCKUP, PAGEUP, CURSOR‐
54 BLOCKLEFT, CURSORBLOCKRIGHT, END, CURSORBLOCKDOWN, PAGEDOWN, INSERT,
55 and REMOVE.
56
59 svgalib(7), vgagl(7), libvga.config(5), keytest(6), eventtest(6), key‐
60 board_init(3), keyboard_init_return_fd(3), keyboard_close(3), key‐
61 board_getstate(3), keyboard_keypressed(3), keyboard_clearstate(3), key‐
62 board_translatekeys(3), keyboard_update(3), keyboard_waitforupdate(3),
63 vga_waitevent(3)
64
67 This manual page was edited by Michael Weller <eowmob@exp-math.uni-
68 essen.de>. The exact source of the referenced function as well as of
69 the original documentation is unknown.
70 It is very likely that both are at least to some extent are due to Harm
72 Hanemaayer <H.Hanemaayer@inter.nl.net>.
73 Occasionally this might be wrong. I hereby asked to be excused by the
75 original author and will happily accept any additions or corrections to
76 this first version of the svgalib manual.
77Svgalib (>= 1.2.11) 27 July 1997 keyboard_seteventhandler(3)