mirror of
https://github.com/Aigor44/ncursesw-morphos.git
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58552e8c76
+ amend changes for tput to reset tty modes to "sane" if the program is run as "reset", like tset. Likewise, ensure that tset sends either reset- or init-strings. + improve manual page descriptions of tput init/reset and tset/reset, to make it easier to see how they are similar and different. + move a static result from key_name() to _nc_globals + modify _nc_get_screensize to allow for use_env() and use_tioctl() state to be per-screen when sp-funcs are configured, better matching the behavior when using the term-driver configuration. + improve cross-references in manual pages for often used functions + move SCREEN field for use_tioctl() data before the ncursesw fields, and limit that to the sp-funcs configuration to improve termlib compatibility (cf: 20120714). + correct order of initialization for traces in use_env() and use_tioctl() versus first trace calls.
183 lines
9.0 KiB
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183 lines
9.0 KiB
HTML
<!--
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****************************************************************************
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* Copyright (c) 1998-2015,2017 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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* furnished to do so, subject to the following conditions: *
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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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* 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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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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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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* authorization. *
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****************************************************************************
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* Author: Thomas E. Dickey 1996-on
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* @Id: resizeterm.3x,v 1.22 2017/01/07 19:25:15 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 class="no-header">resizeterm 3x</H1>
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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><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><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><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).
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</PRE><H3><a name="h3-resizeterm">resizeterm</a></H3><PRE>
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The function <STRONG>resizeterm</STRONG> resizes the standard and current
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windows to the specified dimensions, and adjusts other
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bookkeeping data used by the <STRONG>ncurses</STRONG> library that record
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the window dimensions such as the <STRONG>LINES</STRONG> and <STRONG>COLS</STRONG> vari-
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ables.
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</PRE><H3><a name="h3-resize_term">resize_term</a></H3><PRE>
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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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</PRE><H3><a name="h3-is_term_resized">is_term_resized</a></H3><PRE>
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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 <STRONG>TRUE</STRONG> if the win-
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dows would be modified, and <STRONG>FALSE</STRONG> otherwise.
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</PRE><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><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,
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<STRONG>o</STRONG> on receipt of a SIGWINCH, the handler sets a flag
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<STRONG>o</STRONG> which is tested in <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> and <STRONG>doupdate</STRONG>,
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<STRONG>o</STRONG> in turn, calling the <STRONG>resizeterm</STRONG> function,
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<STRONG>o</STRONG> which <STRONG>ungetch</STRONG>'s a <STRONG>KEY_RESIZE</STRONG> which will be read on the
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next call to <STRONG>wgetch</STRONG>.
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The <STRONG>KEY_RESIZE</STRONG> alerts an application that the screen
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size has changed, and that it should repaint special
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features such as pads that cannot be done automati-
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cally.
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Calling <STRONG>resizeterm</STRONG> or <STRONG>resize_term</STRONG> directly from a sig-
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nal handler is unsafe. This indirect method is used
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to provide a safe way to resize the ncurses data
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structures.
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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><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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It is possible to resize the screen with SVr4 curses, by
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<STRONG>o</STRONG> exiting curses with <STRONG><A HREF="curs_initscr.3x.html">endwin(3x)</A></STRONG> and
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<STRONG>o</STRONG> resuming using <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG>.
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Doing that clears the screen and is visually distracting.
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This extension of ncurses was introduced in mid-1995. It
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was adopted in NetBSD curses (2001) and PDCurses (2003).
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</PRE><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><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>
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<ul>
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<li><a href="#h3-resizeterm">resizeterm</a></li>
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<li><a href="#h3-resize_term">resize_term</a></li>
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<li><a href="#h3-is_term_resized">is_term_resized</a></li>
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</ul>
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</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-PORTABILITY">PORTABILITY</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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