1 /****************************************************************************
2 * Copyright 2020 Thomas E. Dickey *
3 * Copyright 2006-2012,2017 Free Software Foundation, Inc. *
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: *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
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. *
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 *
28 ****************************************************************************/
30 * $Id: redraw.c,v 1.11 2020/02/02 23:34:34 tom Exp $
32 * Demonstrate the redrawwin() and wredrawln() functions.
33 * Thomas Dickey - 2006/11/4
36 #include <test.priv.h>
37 #include <popup_msg.h>
40 trash(int beg_x, int max_x, int cur_x)
44 for (x = cur_x; x > beg_x; --x) {
47 for (x = beg_x; x < max_x; ++x) {
55 for (x = max_x; x > cur_x; --x) {
62 test_redraw(WINDOW *win)
64 static const char *help[] =
68 " w - recur in a new window",
69 " ! - overwrite current line using stdio outside curses.",
70 #ifdef NCURSES_VERSION
71 " @ - run \"date\" command, to put its output on screen.",
73 " ^L - call redrawwin() for current window.",
74 " ^W - call wredrawln() for current line/current window.",
75 " arrow-keys - move cursor on the screen",
77 "Other control characters are added to the screen in printable form.",
78 "Other printable characters are added to the screen as is.",
93 getmaxyx(win, max_y, max_x);
94 getbegyx(win, beg_y, beg_x);
106 win1 = newwin(max_y, max_x,
108 win2 = newwin(max_y - 2, max_x - 2,
109 beg_y + 1, beg_x + 1);
123 * redrawwin() and wredrawln() do not take into account the
124 * possibility that the cursor may have moved. That makes them
125 * cumbersome for using with a shell command. So we simply
126 * trash the current line of the window using backspace/overwrite.
128 trash(beg_x, max_x, x + beg_x);
131 #ifdef NCURSES_VERSION
134 * For a shell command, we can work around the problem noted above
135 * using mvcur(). It is ifdef'd for NCURSES, since X/Open does
136 * not define the case where the old location is unknown.
138 IGNORE_RC(system("date"));
148 wredrawln(win, y, 1);
153 wmove(win, y - 1, x);
158 wmove(win, y + 1, x);
163 wmove(win, y, x - 1);
168 wmove(win, y, x + 1);
172 popup_msg(win, help);
177 waddstr(win, keyname(ch));
180 waddstr(win, unctrl(UChar(ch)));
192 static const char *tbl[] =
194 "Usage: redraw [options]"
197 ," -e use stderr (default stdout)"
198 ," -n do not initialize terminal"
201 for (n = 0; n < SIZEOF(tbl); ++n)
202 fprintf(stderr, "%s\n", tbl[n]);
203 ExitProgram(EXIT_FAILURE);
207 main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
210 bool no_init = FALSE;
211 FILE *my_fp = stdout;
213 while ((ch = getopt(argc, argv, "en")) != -1) {
232 newterm((char *) 0, my_fp, stdin);
239 ExitProgram(EXIT_SUCCESS);