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- * @Id: curs_inopts.3x,v 1.20 2015/11/28 19:03:12 Benno.Schulenberg Exp @
+ * @Id: curs_inopts.3x,v 1.25 2017/02/18 16:39:44 tom Exp @
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-</PRE>
-<H2><a name="h2-NAME">NAME</a></H2><PRE>
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>cbreak</STRONG>, <STRONG>nocbreak</STRONG>, <STRONG>echo</STRONG>, <STRONG>noecho</STRONG>, <STRONG>halfdelay</STRONG>, <STRONG>intrflush</STRONG>,
<STRONG>keypad</STRONG>, <STRONG>meta</STRONG>, <STRONG>nodelay</STRONG>, <STRONG>notimeout</STRONG>, <STRONG>raw</STRONG>, <STRONG>noraw</STRONG>, <STRONG>noqiflush</STRONG>,
<STRONG>qiflush</STRONG>, <STRONG>timeout</STRONG>, <STRONG>wtimeout</STRONG>, <STRONG>typeahead</STRONG> - <STRONG>curses</STRONG> input
options
-</PRE>
-<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>cbreak(void);</STRONG>
<STRONG>int</STRONG> <STRONG>typeahead(int</STRONG> <STRONG>fd);</STRONG>
-</PRE>
-<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
The <STRONG>ncurses</STRONG> library provides several functions which let
an application change the way input from the terminal is
handled. Some are global, applying to all windows. Oth-
the same behavior is needed.
-</PRE>
-<H3><a name="h3-cbreak">cbreak</a></H3><PRE>
+</PRE><H3><a name="h3-cbreak">cbreak</a></H3><PRE>
Normally, the tty driver buffers typed characters until a
newline or carriage return is typed. The <STRONG>cbreak</STRONG> routine
disables line buffering and erase/kill character-process-
these routines interact with <STRONG>echo</STRONG> and <STRONG>noecho</STRONG>.]
-</PRE>
-<H3><a name="h3-echo_noecho">echo/noecho</a></H3><PRE>
+</PRE><H3><a name="h3-echo_noecho">echo/noecho</a></H3><PRE>
The <STRONG>echo</STRONG> and <STRONG>noecho</STRONG> routines control whether characters
- typed by the user are echoed by <STRONG>getch</STRONG> as they are typed.
- Echoing by the tty driver is always disabled, but initial-
- ly <STRONG>getch</STRONG> is in echo mode, so characters typed are echoed.
- Authors of most interactive programs prefer to do their
- own echoing in a controlled area of the screen, or not to
- echo at all, so they disable echoing by calling <STRONG>noecho</STRONG>.
- [See <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG> for a discussion of how these routines
- interact with <STRONG>cbreak</STRONG> and <STRONG>nocbreak</STRONG>.]
+ typed by the user are echoed by <STRONG><A HREF="curs_getch.3x.html">getch(3x)</A></STRONG> as they are
+ typed. Echoing by the tty driver is always disabled, but
+ initially <STRONG>getch</STRONG> is in echo mode, so characters typed are
+ echoed. Authors of most interactive programs prefer to do
+ their own echoing in a controlled area of the screen, or
+ not to echo at all, so they disable echoing by calling
+ <STRONG>noecho</STRONG>. [See <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG> for a discussion of how these
+ routines interact with <STRONG>cbreak</STRONG> and <STRONG>nocbreak</STRONG>.]
-</PRE>
-<H3><a name="h3-halfdelay">halfdelay</a></H3><PRE>
+</PRE><H3><a name="h3-halfdelay">halfdelay</a></H3><PRE>
The <STRONG>halfdelay</STRONG> routine is used for half-delay mode, which
is similar to <STRONG>cbreak</STRONG> mode in that characters typed by the
user are immediately available to the program. However,
half-delay mode.
-</PRE>
-<H3><a name="h3-intrflush">intrflush</a></H3><PRE>
+</PRE><H3><a name="h3-intrflush">intrflush</a></H3><PRE>
If the <STRONG>intrflush</STRONG> option is enabled (<EM>bf</EM> is <STRONG>TRUE</STRONG>), and an
interrupt key is pressed on the keyboard (interrupt,
break, quit), all output in the tty driver queue will be
nored.
-</PRE>
-<H3><a name="h3-keypad">keypad</a></H3><PRE>
+</PRE><H3><a name="h3-keypad">keypad</a></H3><PRE>
The <STRONG>keypad</STRONG> option enables the keypad of the user's termi-
nal. If enabled (<EM>bf</EM> is <STRONG>TRUE</STRONG>), the user can press a func-
- tion key (such as an arrow key) and <STRONG>wgetch</STRONG> returns a sin-
- gle value representing the function key, as in <STRONG>KEY_LEFT</STRONG>.
- If disabled (<EM>bf</EM> is <STRONG>FALSE</STRONG>), <STRONG>curses</STRONG> does not treat function
- keys specially and the program has to interpret the escape
- sequences itself. If the keypad in the terminal can be
- turned on (made to transmit) and off (made to work local-
- ly), turning on this option causes the terminal keypad to
- be turned on when <STRONG>wgetch</STRONG> is called. The default value for
- keypad is <STRONG>FALSE</STRONG>.
-
-
-</PRE>
-<H3><a name="h3-meta">meta</a></H3><PRE>
+ tion key (such as an arrow key) and <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> returns a
+ single value representing the function key, as in
+ <STRONG>KEY_LEFT</STRONG>. If disabled (<EM>bf</EM> is <STRONG>FALSE</STRONG>), <STRONG>curses</STRONG> does not
+ treat function keys specially and the program has to in-
+ terpret the escape sequences itself. If the keypad in the
+ terminal can be turned on (made to transmit) and off (made
+ to work locally), turning on this option causes the termi-
+ nal keypad to be turned on when <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> is called. The
+ default value for keypad is <STRONG>FALSE</STRONG>.
+
+
+</PRE><H3><a name="h3-meta">meta</a></H3><PRE>
Initially, whether the terminal returns 7 or 8 significant
bits on input depends on the control mode of the tty driv-
er [see <STRONG>termio(7)</STRONG>]. To force 8 bits to be returned, in-
<STRONG>FALSE</STRONG>) is called.
-</PRE>
-<H3><a name="h3-nodelay">nodelay</a></H3><PRE>
+</PRE><H3><a name="h3-nodelay">nodelay</a></H3><PRE>
The <STRONG>nodelay</STRONG> option causes <STRONG>getch</STRONG> to be a non-blocking call.
If no input is ready, <STRONG>getch</STRONG> returns <STRONG>ERR</STRONG>. If disabled (<EM>bf</EM>
is <STRONG>FALSE</STRONG>), <STRONG>getch</STRONG> waits until a key is pressed.
- While interpreting an input escape sequence, <STRONG>wgetch</STRONG> sets a
- timer while waiting for the next character. If <STRONG>notime-</STRONG>
- <STRONG>out(</STRONG><EM>win</EM>, <STRONG>TRUE</STRONG>) is called, then <STRONG>wgetch</STRONG> does not set a
+ While interpreting an input escape sequence, <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG>
+ sets a timer while waiting for the next character. If <STRONG>no-</STRONG>
+ <STRONG>timeout(</STRONG><EM>win</EM>, <STRONG>TRUE</STRONG>) is called, then <STRONG>wgetch</STRONG> does not set a
timer. The purpose of the timeout is to differentiate be-
tween sequences received from a function key and those
typed by a user.
-</PRE>
-<H3><a name="h3-raw_noraw">raw/noraw</a></H3><PRE>
+</PRE><H3><a name="h3-raw_noraw">raw/noraw</a></H3><PRE>
The <STRONG>raw</STRONG> and <STRONG>noraw</STRONG> routines place the terminal into or out
of raw mode. Raw mode is similar to <STRONG>cbreak</STRONG> mode, in that
characters typed are immediately passed through to the us-
bits in the tty driver that are not set by <STRONG>curses</STRONG>.
-</PRE>
-<H3><a name="h3-noqiflush">noqiflush</a></H3><PRE>
+</PRE><H3><a name="h3-noqiflush">noqiflush</a></H3><PRE>
When the <STRONG>noqiflush</STRONG> routine is used, normal flush of input
and output queues associated with the <STRONG>INTR</STRONG>, <STRONG>QUIT</STRONG> and <STRONG>SUSP</STRONG>
characters will not be done [see <STRONG>termio(7)</STRONG>]. When <STRONG>qiflush</STRONG>
is called, the queues will be flushed when these control
- characters are read. You may want to call <STRONG>noqiflush()</STRONG> in
- a signal handler if you want output to continue as though
+ characters are read. You may want to call <STRONG>noqiflush</STRONG> in a
+ signal handler if you want output to continue as though
the interrupt had not occurred, after the handler exits.
-</PRE>
-<H3><a name="h3-timeout_wtimeout">timeout/wtimeout</a></H3><PRE>
+</PRE><H3><a name="h3-timeout_wtimeout">timeout/wtimeout</a></H3><PRE>
The <STRONG>timeout</STRONG> and <STRONG>wtimeout</STRONG> routines set blocking or non-
blocking read for a given window. If <EM>delay</EM> is negative,
blocking read is used (i.e., waits indefinitely for in-
<EM>lay</EM> milliseconds (where <EM>delay</EM> is positive).
-</PRE>
-<H3><a name="h3-typeahead">typeahead</a></H3><PRE>
+</PRE><H3><a name="h3-typeahead">typeahead</a></H3><PRE>
The <STRONG>curses</STRONG> library does "line-breakout optimization" by
looking for typeahead periodically while updating the
screen. If input is found, and it is coming from a tty,
- the current update is postponed until <STRONG>refresh</STRONG> or <STRONG>doupdate</STRONG>
- is called again. This allows faster response to commands
- typed in advance. Normally, the input FILE pointer passed
- to <STRONG>newterm</STRONG>, or <STRONG>stdin</STRONG> in the case that <STRONG>initscr</STRONG> was used,
- will be used to do this typeahead checking. The <STRONG>typeahead</STRONG>
- routine specifies that the file descriptor <EM>fd</EM> is to be
- used to check for typeahead instead. If <EM>fd</EM> is -1, then no
- typeahead checking is done.
+ the current update is postponed until <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG> or <STRONG>doup-</STRONG>
+ <STRONG>date</STRONG> is called again. This allows faster response to com-
+ mands typed in advance. Normally, the input FILE pointer
+ passed to <STRONG>newterm</STRONG>, or <STRONG>stdin</STRONG> in the case that <STRONG>initscr</STRONG> was
+ used, will be used to do this typeahead checking. The <STRONG>ty-</STRONG>
+ <STRONG>peahead</STRONG> routine specifies that the file descriptor <EM>fd</EM> is
+ to be used to check for typeahead instead. If <EM>fd</EM> is -1,
+ then no typeahead checking is done.
-</PRE>
-<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
All routines that return an integer return <STRONG>ERR</STRONG> upon fail-
ure and OK (SVr4 specifies only "an integer value other
than <STRONG>ERR</STRONG>") upon successful completion, unless otherwise
the range 1..255.
-</PRE>
-<H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These functions are described in the XSI Curses standard,
Issue 4.
When <STRONG>keypad</STRONG> is first enabled, ncurses loads the key-defi-
nitions for the current terminal description. If the ter-
minal description includes extended string capabilities,
- e.g., from using the <STRONG>-x</STRONG> option of tic, then ncurses also
+ e.g., from using the <STRONG>-x</STRONG> option of <STRONG>tic</STRONG>, then ncurses also
defines keys for the capabilities whose names begin with
"k". The corresponding keycodes are generated and (de-
pending on previous loads of terminal descriptions) may
curses key-names). On the other hand, an application can
use <STRONG>define_key</STRONG> to establish a specific keycode for a given
string. This makes it possible for an application to
- check for an extended capability's presence with <EM>tigetstr</EM>,
+ check for an extended capability's presence with <STRONG>tigetstr</STRONG>,
and reassign the keycode to match its own needs.
Low-level applications can use <STRONG>tigetstr</STRONG> to obtain the def-
used.
-</PRE>
-<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
Note that <STRONG>echo</STRONG>, <STRONG>noecho</STRONG>, <STRONG>halfdelay</STRONG>, <STRONG>intrflush</STRONG>, <STRONG>meta</STRONG>, <STRONG>node-</STRONG>
<STRONG>lay</STRONG>, <STRONG>notimeout</STRONG>, <STRONG>noqiflush</STRONG>, <STRONG>qiflush</STRONG>, <STRONG>timeout</STRONG>, and <STRONG>wtimeout</STRONG>
may be macros.
The <STRONG>noraw</STRONG> and <STRONG>nocbreak</STRONG> calls follow historical practice in
- that they attempt to restore to normal (`cooked') mode
+ that they attempt to restore to normal ("cooked") mode
from raw and cbreak modes respectively. Mixing raw/noraw
and cbreak/nocbreak calls leads to tty driver control
states that are hard to predict or understand; it is not
recommended.
-</PRE>
-<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>,
<STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>, <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG>, <STRONG>termio(7)</STRONG>
projects / ncurses.git / blobdiff