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30 * Author: Thomas E. Dickey 1997
31 * @Id: define_key.3x,v 1.44 2024/05/18 20:04:21 tom Exp @
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38 <TITLE>define_key 3x 2024-05-18 ncurses 6.5 Library calls</TITLE>
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43 <H1 class="no-header">define_key 3x 2024-05-18 ncurses 6.5 Library calls</H1>
45 <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG> Library calls <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG>
50 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
51 <STRONG>define_key</STRONG> - define a <EM>curses</EM> function key code
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
57 <STRONG>int</STRONG> <STRONG>define_key(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <EM>definition</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>key-code</EM><STRONG>);</STRONG>
60 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
61 The <STRONG>define_key</STRONG> <EM>ncurses</EM> extension permits a <EM>curses</EM> application to <EM>bind</EM> a
62 string <EM>definition</EM> to the function key <EM>key-code</EM> returned by <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG>
63 (wide-character API users: <STRONG><A HREF="curs_get_wch.3x.html">wget_wch(3x)</A></STRONG>) when <STRONG><A HREF="curs_inopts.3x.html">keypad(3x)</A></STRONG> is enabled in
64 a window and a function key is pressed. <EM>ncurses</EM> interprets such a
65 binding as it does those in the <EM>terminfo</EM> database entry for the
68 A <EM>definition</EM> of <STRONG>NULL</STRONG> removes any existing one <EM>key-code</EM>. Similarly, a
69 non-positive <EM>key-code</EM> removes any existing bindings for <EM>definition</EM>.
72 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
73 <STRONG>define_key</STRONG> returns <STRONG>ERR</STRONG> if
75 <STRONG>o</STRONG> <EM>definition</EM> is <STRONG>NULL</STRONG> and <EM>key-code</EM> is nonpositive, or
77 <STRONG>o</STRONG> insufficient memory is available to bind <EM>definition</EM> to <EM>key-code</EM>.
79 Otherwise, <STRONG>define_key</STRONG> returns <STRONG>OK</STRONG>.
82 </PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
83 <STRONG>define_key</STRONG> is an <EM>ncurses</EM> extension.
86 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
87 Applications employing <EM>ncurses</EM> extensions should condition their use on
88 the visibility of the <STRONG>NCURSES_VERSION</STRONG> preprocessor macro.
90 NetBSD <EM>curses</EM> since 2.0 (2004) supports <STRONG>define_key</STRONG>.
93 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
97 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
98 <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, <STRONG><A HREF="keyok.3x.html">keyok(3x)</A></STRONG>, <STRONG><A HREF="key_defined.3x.html">key_defined(3x)</A></STRONG>, <STRONG><A HREF="keybound.3x.html">keybound(3x)</A></STRONG>, <STRONG><A HREF="keyok.3x.html">keyok(3x)</A></STRONG>,
99 <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
103 ncurses 6.5 2024-05-18 <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG>
107 <li><a href="#h2-NAME">NAME</a></li>
108 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
109 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
110 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
111 <li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
112 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
113 <li><a href="#h2-AUTHORS">AUTHORS</a></li>
114 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>