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-<H1>curs_inopts 3x</H1>
-<HR>
+<H1 class="no-header">curs_inopts 3x</H1>
<PRE>
-<!-- Manpage converted by man2html 3.0.1 -->
<STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG> <STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG>
</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
</PRE>
+<H2>
<a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>cbreak(void);</STRONG>
</PRE>
-<H2>DESCRIPTION</H2><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-
+ ers apply only to a specific window. Window-specific set-
+ tings are not automatically applied to new or derived win-
+ dows. An application must apply these to each window, if
+ the same behavior is needed.
+
+
+</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-
rides <STRONG>raw</STRONG>. [See <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG> for a discussion of how
these routines interact with <STRONG>echo</STRONG> and <STRONG>noecho</STRONG>.]
+
+</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-
[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>
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,
after blocking for <EM>tenths</EM> tenths of seconds, ERR is re-
- turned if nothing has been typed. The value of <STRONG>tenths</STRONG>
+ turned if nothing has been typed. The value of <EM>tenths</EM>
must be a number between 1 and 255. Use <STRONG>nocbreak</STRONG> to leave
half-delay mode.
- If the <STRONG>intrflush</STRONG> option is enabled, (<EM>bf</EM> is <STRONG>TRUE</STRONG>), when an
+
+</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
+ break, quit), all output in the tty driver queue will be
flushed, giving the effect of faster response to the in-
terrupt, but causing <STRONG>curses</STRONG> to have the wrong idea of what
- is on the screen. Disabling (<EM>bf</EM> is <STRONG>FALSE</STRONG>), the option
- prevents the flush. The default for the option is inher-
- ited from the tty driver settings. The window argument is
- ignored.
+ is on the screen. Disabling the option (<EM>bf</EM> is <STRONG>FALSE</STRONG>) pre-
+ vents the flush. The default for the option is inherited
+ from the tty driver settings. The window argument is ig-
+ nored.
+
+</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-
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 false.
+ 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><A HREF="termio.7.html">termio(7)</A></STRONG>]. To force 8 bits to be returned, in-
+ er [see <STRONG>termio(7)</STRONG>]. To force 8 bits to be returned, in-
voke <STRONG>meta</STRONG>(<EM>win</EM>, <STRONG>TRUE</STRONG>); this is equivalent, under POSIX, to
setting the CS8 flag on the terminal. To force 7 bits to
be returned, invoke <STRONG>meta</STRONG>(<EM>win</EM>, <STRONG>FALSE</STRONG>); this is equivalent,
<STRONG>meta</STRONG>(<EM>win</EM>, <STRONG>TRUE</STRONG>) is called and <STRONG>rmm</STRONG> is sent when <STRONG>meta</STRONG>(<EM>win</EM>,
<STRONG>FALSE</STRONG>) is called.
+
+</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.
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>
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-
signal. The behavior of the BREAK key depends on other
bits in the tty driver that are not set by <STRONG>curses</STRONG>.
+
+</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><A HREF="termio.7.html">termio(7)</A></STRONG>]. When <STRONG>qiflush</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
the interrupt had not occurred, after the handler exits.
+
+</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-
additional capability of being able to block for only <EM>de-</EM>
<EM>lay</EM> milliseconds (where <EM>delay</EM> is positive).
- The <STRONG>curses</STRONG> library does ``line-breakout optimization'' by
+
+</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>
</PRE>
-<H2>
RETURN VALUE</H2><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
</PRE>
-<H2>
PORTABILITY</H2><PRE>
+<H2>
<a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These functions are described in the XSI Curses standard,
Issue 4.
ty, set echo or noecho explicitly just after initializa-
tion, even if your program remains in cooked mode.
+ 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
+ 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
+ differ from one execution of a program to the next. The
+ generated keycodes are recognized by the <STRONG>keyname</STRONG> function
+ (which will then return a name beginning with "k" denoting
+ the terminfo capability name rather than "K", used for
+ 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>,
+ and reassign the keycode to match its own needs.
+
+ Low-level applications can use <STRONG>tigetstr</STRONG> to obtain the def-
+ inition of any particular string capability. Higher-level
+ applications which use the curses <STRONG>wgetch</STRONG> and similar func-
+ tions to return keycodes rely upon the order in which the
+ strings are loaded. If more than one key definition has
+ the same string value, then <STRONG>wgetch</STRONG> can return only one
+ keycode. Most curses implementations (including ncurses)
+ load key definitions in the order defined by the array of
+ string capability names. The last key to be loaded deter-
+ mines the keycode which will be returned. In ncurses, you
+ may also have extended capabilities interpreted as key
+ definitions. These are loaded after the predefined keys,
+ and if a capability's value is the same as a previously-
+ loaded key definition, the later definition is the one
+ used.
+
</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>
+<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
- 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
+ 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>SEE ALSO</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="termio.7.html">termio(7)</A></STRONG>
+<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>
<STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG>
</PRE>
-<HR>
-<ADDRESS>
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+<div class="nav">
+<ul>
+<li><a href="#h2-NAME">NAME</a></li>
+<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
+<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
+<ul>
+<li><a href="#h3-cbreak">cbreak</a></li>
+<li><a href="#h3-echo_noecho">echo/noecho</a></li>
+<li><a href="#h3-halfdelay">halfdelay</a></li>
+<li><a href="#h3-intrflush">intrflush</a></li>
+<li><a href="#h3-keypad">keypad</a></li>
+<li><a href="#h3-meta">meta</a></li>
+<li><a href="#h3-nodelay">nodelay</a></li>
+<li><a href="#h3-raw_noraw">raw/noraw</a></li>
+<li><a href="#h3-noqiflush">noqiflush</a></li>
+<li><a href="#h3-timeout_wtimeout">timeout/wtimeout</a></li>
+<li><a href="#h3-typeahead">typeahead</a></li>
+</ul>
+</li>
+<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
+</ul>
+</div>
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