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761e4f0825
+ corrected ifdefs in test/testcurs.c to allow comparison of mouse interface versus pdcurses (cf: 20130316). + add pow() to configure-check for math library, needed since 20121208 for test/hanoi (Debian #708056). + regenerated html manpages. + update doctype used for html documentation.
156 lines
8.4 KiB
HTML
156 lines
8.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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****************************************************************************
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* Copyright (c) 2002-2010,2012 Free Software Foundation, Inc. *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* @Id: curs_get_wch.3x,v 1.8 2012/11/03 23:03:59 tom Exp @
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-->
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<HTML>
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<HEAD>
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<TITLE>curs_get_wch 3x</TITLE>
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<link rev=made href="mailto:bug-ncurses@gnu.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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</HEAD>
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<BODY>
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<H1>curs_get_wch 3x</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<STRONG><A HREF="curs_get_wch.3x.html">curs_get_wch(3x)</A></STRONG> <STRONG><A HREF="curs_get_wch.3x.html">curs_get_wch(3x)</A></STRONG>
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</PRE>
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<H2>NAME</H2><PRE>
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<STRONG>get_wch</STRONG>, <STRONG>wget_wch</STRONG>, <STRONG>mvget_wch</STRONG>, <STRONG>mvwget_wch</STRONG>, <STRONG>unget_wch</STRONG> - get
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(or push back) a wide character from curses terminal key-
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board
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>int</STRONG> <STRONG>get_wch(wint_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>wget_wch(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>mvget_wch(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>mvwget_wch(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>unget_wch(const</STRONG> <STRONG>wchar_t</STRONG> <EM>wch</EM><STRONG>);</STRONG>
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <STRONG>get_wch</STRONG>, <STRONG>wget_wch</STRONG>, <STRONG>mvget_wch</STRONG>, and <STRONG>mvwget_wch</STRONG> functions
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read a character from the terminal associated with the
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current or specified window. In no-delay mode, if no
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input is waiting, the value <STRONG>ERR</STRONG> is returned. In delay
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mode, the program waits until the system passes text
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through to the program. Depending on the setting of
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<STRONG>cbreak</STRONG>, this is after one character (cbreak mode), or
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after the first newline (nocbreak mode). In half-delay
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mode, the program waits until the user types a character
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or the specified timeout interval has elapsed.
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Unless <STRONG>noecho</STRONG> has been set, these routines echo the char-
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acter into the designated window.
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If the window is not a pad and has been moved or modified
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since the last call to <STRONG>wrefresh</STRONG>, <STRONG>wrefresh</STRONG> will be called
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before another character is read.
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If <STRONG>keypad</STRONG> is enabled, these functions respond to the
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pressing of a function key by setting the object pointed
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to by <EM>wch</EM> to the corresponding <STRONG>KEY_</STRONG> value defined in
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<STRONG><curses.h></STRONG> and returning <STRONG>KEY_CODE_YES</STRONG>. If a character
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(such as escape) that could be the beginning of a function
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key is received, curses sets a timer. If the remainder of
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the sequence does arrive within the designated time,
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curses passes through the character; otherwise, curses
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returns the function key value. For this reason, many
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terminals experience a delay between the time a user
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presses the escape key and the time the escape is returned
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to the program.
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The <STRONG>unget_wch</STRONG> function pushes the wide character <EM>wch</EM> back
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onto the head of the input queue, so the wide character is
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returned by the next call to <STRONG>get_wch</STRONG>. The pushback of one
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character is guaranteed. If the program calls <STRONG>unget_wch</STRONG>
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too many times without an intervening call to <STRONG>get_wch</STRONG>, the
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operation may fail.
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</PRE>
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<H2>NOTES</H2><PRE>
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The header file <STRONG><curses.h></STRONG> automatically includes the
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header file <STRONG><stdio.h></STRONG>.
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Applications should not define the escape key by itself as
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a single-character function.
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When using <STRONG>get_wch</STRONG>, <STRONG>wget_wch</STRONG>, <STRONG>mvget_wch</STRONG>, or <STRONG>mvwget_wch</STRONG>,
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applications should not use <STRONG>nocbreak</STRONG> mode and <STRONG>echo</STRONG> mode at
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the same time. Depending on the state of the tty driver
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when each character is typed, the program may produce
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undesirable results.
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All functions except <STRONG>wget_wch</STRONG> and <STRONG>unget_wch</STRONG> may be macros.
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</PRE>
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<H2>RETURN VALUE</H2><PRE>
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When <STRONG>get_wch</STRONG>, <STRONG>wget_wch</STRONG>, <STRONG>mvget_wch</STRONG>, and <STRONG>mvwget_wch</STRONG> func-
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tions successfully report the pressing of a function key,
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they return <STRONG>KEY_CODE_YES</STRONG>. When they successfully report a
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wide character, they return <STRONG>OK</STRONG>. Otherwise, they return
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<STRONG>ERR</STRONG>.
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Upon successful completion, <STRONG>unget_wch</STRONG> returns <STRONG>OK</STRONG>. Other-
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wise, the function returns <STRONG>ERR</STRONG>.
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Functions with a "mv" prefix first perform a cursor move-
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ment using <STRONG>wmove</STRONG>, and return an error if the position is
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outside the window, or if the window pointer is null.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<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_ins_wch.3x.html">curs_ins_wch(3x)</A></STRONG>,
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<STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG>, <STRONG><A HREF="curs_move.3x.html">curs_move(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>
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<STRONG><A HREF="curs_get_wch.3x.html">curs_get_wch(3x)</A></STRONG>
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</PRE>
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<HR>
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<ADDRESS>
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Man(1) output converted with
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<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
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</ADDRESS>
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</BODY>
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</HTML>
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