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148 lines
7.4 KiB
HTML
148 lines
7.4 KiB
HTML
<!--
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****************************************************************************
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* Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************
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* Author: Thomas E. Dickey 1996-on
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* @Id: resizeterm.3x,v 1.17 2013/06/22 20:41:54 tom Exp @
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-->
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<HTML>
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>resizeterm 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>resizeterm 3x</H1>
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<HR>
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<PRE>
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<STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG> <STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG>
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</PRE>
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<H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>is_term_resized</STRONG>, <STRONG>resize_term</STRONG>, <STRONG>resizeterm</STRONG> - change the
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curses terminal size
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</PRE>
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<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>bool</STRONG> <STRONG>is_term_resized(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
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<STRONG>int</STRONG> <STRONG>resize_term(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
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<STRONG>int</STRONG> <STRONG>resizeterm(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
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</PRE>
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<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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This is an extension to the curses library. It provides
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callers with a hook into the <STRONG>ncurses</STRONG> data to resize win-
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dows, primarily for use by programs running in an X Window
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terminal (e.g., xterm). The function <STRONG>resizeterm</STRONG> resizes
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the standard and current windows to the specified dimen-
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sions, and adjusts other bookkeeping data used by the
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<STRONG>ncurses</STRONG> library that record the window dimensions such as
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the <STRONG>LINES</STRONG> and <STRONG>COLS</STRONG> variables.
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Most of the work is done by the inner function
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<STRONG>resize_term</STRONG>. The outer function <STRONG>resizeterm</STRONG> adds bookkeep-
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ing for the SIGWINCH handler. When resizing the windows,
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<STRONG>resize_term</STRONG> blank-fills the areas that are extended. The
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calling application should fill in these areas with appro-
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priate data. The <STRONG>resize_term</STRONG> function attempts to resize
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all windows. However, due to the calling convention of
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pads, it is not possible to resize these without addi-
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tional interaction with the application.
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A support function <STRONG>is_term_resized</STRONG> is provided so that
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applications can check if the <STRONG>resize_term</STRONG> function would
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modify the window structures. It returns TRUE if the win-
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dows would be modified, and FALSE otherwise.
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</PRE>
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<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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Except as noted, these functions return the integer <STRONG>ERR</STRONG>
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upon failure and <STRONG>OK</STRONG> on success. They will fail if either
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of the dimensions are less than or equal to zero, or if an
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error occurs while (re)allocating memory for the windows.
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</PRE>
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<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
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While these functions are intended to be used to support a
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signal handler (i.e., for SIGWINCH), care should be taken
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to avoid invoking them in a context where <STRONG>malloc</STRONG> or <STRONG>real-</STRONG>
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<STRONG>loc</STRONG> may have been interrupted, since it uses those func-
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tions.
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If ncurses is configured to supply its own SIGWINCH han-
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dler, the <STRONG>resizeterm</STRONG> function <STRONG>ungetch</STRONG>'s a <STRONG>KEY_RESIZE</STRONG> which
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will be read on the next call to <STRONG>getch</STRONG>. This is used to
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alert an application that the screen size has changed, and
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that it should repaint special features such as pads that
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cannot be done automatically.
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If the environment variables <STRONG>LINES</STRONG> or <STRONG>COLUMNS</STRONG> are set,
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this overrides the library's use of the window size
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obtained from the operating system. Thus, even if a SIG-
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WINCH is received, no screen size change may be recorded.
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</PRE>
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<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>, <STRONG><A HREF="wresize.3x.html">wresize(3x)</A></STRONG>.
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</PRE>
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<H2><a name="h2-AUTHOR">AUTHOR</a></H2><PRE>
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Thomas Dickey (from an equivalent function written in 1988
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for BSD curses).
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<STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-NOTES">NOTES</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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<li><a href="#h2-AUTHOR">AUTHOR</a></li>
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</ul>
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</div>
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</BODY>
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</HTML>
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