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/****************************************************************************
* Copyright 2020-2024,2025 Thomas E. Dickey *
* Copyright 2002-2006,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/*
* $Id: demo_keyok.c,v 1.12 2025/07/05 15:21:56 tom Exp $
*
* Demonstrate the keyok() function.
* Thomas Dickey - 2002/11/23
*/
#include <test.priv.h>
#if defined(NCURSES_VERSION) && NCURSES_EXT_FUNCS
static void
usage(int ok)
{
static const char *msg[] =
{
"Usage: demo_keyok [options]"
,""
,USAGE_COMMON
};
size_t n;
for (n = 0; n < SIZEOF(msg); n++)
fprintf(stderr, "%s\n", msg[n]);
ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
/* *INDENT-OFF* */
VERSION_COMMON()
/* *INDENT-ON* */
int
main(int argc, char *argv[])
{
int lastch = ERR;
int prior = ERR;
int ch;
WINDOW *win;
while ((ch = getopt(argc, argv, OPTS_COMMON)) != -1) {
switch (ch) {
default:
CASE_COMMON;
/* NOTREACHED */
}
}
if (optind < argc)
usage(FALSE);
setlocale(LC_ALL, "");
initscr();
(void) cbreak(); /* take input chars one at a time, no wait for \n */
(void) noecho(); /* don't echo input */
printw("Typing any function key will disable it, but typing it twice in\n");
printw("a row will turn it back on (just for a demo).");
refresh();
win = newwin(LINES - 2, COLS, 2, 0);
scrollok(win, TRUE);
keypad(win, TRUE);
wmove(win, 0, 0);
while ((ch = wgetch(win)) != ERR) {
const char *name = keyname(ch);
if (ch == QUIT)
break;
if (ch == ESCAPE && prior == ch)
break;
prior = ch;
wprintw(win, "Keycode %d, name %s\n",
ch,
name != NULL ? name : "<null>");
wclrtoeol(win);
wrefresh(win);
if (ch >= KEY_MIN) {
keyok(ch, FALSE);
lastch = ch;
} else if (lastch >= KEY_MIN) {
keyok(lastch, TRUE);
}
}
endwin();
ExitProgram(EXIT_SUCCESS);
}
#else
int
main(void)
{
printf("This program requires the ncurses library\n");
ExitProgram(EXIT_FAILURE);
}
#endif
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