1 /****************************************************************************
2 * Copyright 2020,2022 Thomas E. Dickey *
3 * Copyright 2002-2006,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29 /*
30 * $Id: demo_keyok.c,v 1.9 2022/12/10 23:31:31 tom Exp $
31 *
32 * Demonstrate the keyok() function.
33 * Thomas Dickey - 2002/11/23
34 */
35
36 #include <test.priv.h>
37
38 #if defined(NCURSES_VERSION) && NCURSES_EXT_FUNCS
39 static void
usage(int ok)40 usage(int ok)
41 {
42 static const char *msg[] =
43 {
44 "Usage: demo_keyok [options]"
45 ,""
46 ,USAGE_COMMON
47 };
48 size_t n;
49
50 for (n = 0; n < SIZEOF(msg); n++)
51 fprintf(stderr, "%s\n", msg[n]);
52
53 ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
54 }
55 /* *INDENT-OFF* */
VERSION_COMMON()56 VERSION_COMMON()
57 /* *INDENT-ON* */
58
59 int
60 main(int argc, char *argv[])
61 {
62 int lastch = ERR;
63 int prior = ERR;
64 int ch;
65 WINDOW *win;
66
67 while ((ch = getopt(argc, argv, OPTS_COMMON)) != -1) {
68 switch (ch) {
69 case OPTS_VERSION:
70 show_version(argv);
71 ExitProgram(EXIT_SUCCESS);
72 default:
73 usage(ch == OPTS_USAGE);
74 /* NOTREACHED */
75 }
76 }
77 if (optind < argc)
78 usage(FALSE);
79
80 setlocale(LC_ALL, "");
81 initscr();
82 (void) cbreak(); /* take input chars one at a time, no wait for \n */
83 (void) noecho(); /* don't echo input */
84
85 printw("Typing any function key will disable it, but typing it twice in\n");
86 printw("a row will turn it back on (just for a demo).");
87 refresh();
88
89 win = newwin(LINES - 2, COLS, 2, 0);
90 scrollok(win, TRUE);
91 keypad(win, TRUE);
92 wmove(win, 0, 0);
93
94 while ((ch = wgetch(win)) != ERR) {
95 const char *name = keyname(ch);
96 if (ch == ESCAPE && prior == ch)
97 break;
98 prior = ch;
99 wprintw(win, "Keycode %d, name %s\n",
100 ch,
101 name != 0 ? name : "<null>");
102 wclrtoeol(win);
103 wrefresh(win);
104 if (ch >= KEY_MIN) {
105 keyok(ch, FALSE);
106 lastch = ch;
107 } else if (lastch >= KEY_MIN) {
108 keyok(lastch, TRUE);
109 }
110 }
111 endwin();
112 ExitProgram(EXIT_SUCCESS);
113 }
114 #else
115 int
main(void)116 main(void)
117 {
118 printf("This program requires the ncurses library\n");
119 ExitProgram(EXIT_FAILURE);
120 }
121 #endif
122