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+ * Author: Thomas E. Dickey 1996-on
+ * @Id: resizeterm.3x,v 1.19 2015/06/06 23:38:18 tom Exp @
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+<H1 class="no-header">resizeterm 3x</H1>
<PRE>
-<!-- Manpage converted by man2html 3.0.1 -->
+<STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG> <STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG>
+
+
+
</PRE>
-<H2>NAME</H2><PRE>
- <B>resizeterm</B> - change the curses terminal size
+<H2><a name="h2-NAME">NAME</a></H2><PRE>
+ <STRONG>is_term_resized</STRONG>, <STRONG>resize_term</STRONG>, <STRONG>resizeterm</STRONG> - change the
+ curses terminal size
</PRE>
-<H2>SYNOPSIS</H2><PRE>
- <B>#include</B> <B><curses.h></B>
+<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
+ <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
- <B>int</B> <B>resizeterm(int</B> <B>lines,</B> <B>int</B> <B>columns);</B>
+ <STRONG>bool</STRONG> <STRONG>is_term_resized(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
+ <STRONG>int</STRONG> <STRONG>resize_term(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
+ <STRONG>int</STRONG> <STRONG>resizeterm(int</STRONG> <STRONG>lines,</STRONG> <STRONG>int</STRONG> <STRONG>columns);</STRONG>
</PRE>
-<H2>DESCRIPTION</H2><PRE>
- This is an extension to the curses library. It provides
- callers with a hook into the <B>ncurses</B> data to resize win-
+<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+ This is an extension to the curses library. It provides
+ callers with a hook into the <STRONG>ncurses</STRONG> data to resize win-
dows, primarily for use by programs running in an X Window
- terminal (e.g., xterm). The function <B>resizeterm</B> resizes
- the standard and current windows to the specified dimen-
- sions, and adjusts other bookkeeping data used by the
- <B>ncurses</B> library that record the window dimensions.
+ terminal (e.g., xterm).
- When resizing the windows, the function blank-fills the
- areas that are extended. The calling application should
- fill in these areas with appropriate data.
- The function attempts to resize all windows. However, due
- to the calling convention of pads, it is not possible to
- resize these without additional interaction with the
- application.
+</PRE>
+<H3><a name="h3-resizeterm">resizeterm</a></H3><PRE>
+ The function <STRONG>resizeterm</STRONG> resizes the standard and current
+ windows to the specified dimensions, and adjusts other
+ bookkeeping data used by the <STRONG>ncurses</STRONG> library that record
+ the window dimensions such as the <STRONG>LINES</STRONG> and <STRONG>COLS</STRONG> vari-
+ ables.
</PRE>
-<H2>RETURN VALUE</H2><PRE>
- The function returns the integer <B>ERR</B> upon failure and <B>OK</B>
- on success. It will fail if either of the dimensions less
- than or equal to zero, or if an error occurs while
- (re)allocating memory for the windows.
+<H3><a name="h3-resize_term">resize_term</a></H3><PRE>
+ Most of the work is done by the inner function
+ <STRONG>resize_term</STRONG>. The outer function <STRONG>resizeterm</STRONG> adds bookkeep-
+ ing for the SIGWINCH handler. When resizing the windows,
+ <STRONG>resize_term</STRONG> blank-fills the areas that are extended. The
+ calling application should fill in these areas with appro-
+ priate data. The <STRONG>resize_term</STRONG> function attempts to resize
+ all windows. However, due to the calling convention of
+ pads, it is not possible to resize these without addi-
+ tional interaction with the application.
</PRE>
-<H2>NOTES</H2><PRE>
- While this function is intended to be used to support a
+<H3><a name="h3-is_term_resized">is_term_resized</a></H3><PRE>
+ A support function <STRONG>is_term_resized</STRONG> is provided so that
+ applications can check if the <STRONG>resize_term</STRONG> function would
+ modify the window structures. It returns <STRONG>TRUE</STRONG> if the win-
+ dows would be modified, and <STRONG>FALSE</STRONG> otherwise.
+
+
+</PRE>
+<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+ Except as noted, these functions return the integer <STRONG>ERR</STRONG>
+ upon failure and <STRONG>OK</STRONG> on success. They will fail if either
+ of the dimensions are less than or equal to zero, or if an
+ error occurs while (re)allocating memory for the windows.
+
+
+</PRE>
+<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ While these functions are intended to be used to support a
signal handler (i.e., for SIGWINCH), care should be taken
- to avoid invoking it in a context where <B>malloc</B> or <B>realloc</B>
- may have been interrupted, since it uses those functions.
+ to avoid invoking them in a context where <STRONG>malloc</STRONG> or <STRONG>real-</STRONG>
+ <STRONG>loc</STRONG> may have been interrupted, since it uses those func-
+ tions.
If ncurses is configured to supply its own SIGWINCH han-
- dler, the <B>resizeterm</B> function ungetch's a <B>KEY_RESIZE</B> which
- will be read on the next call to <B>getch</B>. This is used to
+ dler, the <STRONG>resizeterm</STRONG> function <STRONG>ungetch</STRONG>'s a <STRONG>KEY_RESIZE</STRONG> which
+ will be read on the next call to <STRONG>getch</STRONG>. This is used to
alert an application that the screen size has changed, and
that it should repaint special features such as pads that
cannot be done automatically.
+ If the environment variables <STRONG>LINES</STRONG> or <STRONG>COLUMNS</STRONG> are set,
+ this overrides the library's use of the window size
+ obtained from the operating system. Thus, even if a SIG-
+ WINCH is received, no screen size change may be recorded.
+
</PRE>
-<H2>SEE ALSO</H2><PRE>
- <B><A HREF="wresize.3x.html">wresize(3x)</A></B>.
+<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <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>.
</PRE>
-<H2>AUTHOR</H2><PRE>
+<H2><a name="h2-AUTHOR">AUTHOR</a></H2><PRE>
Thomas Dickey (from an equivalent function written in 1988
for BSD curses).
+ <STRONG><A HREF="resizeterm.3x.html">resizeterm(3x)</A></STRONG>
</PRE>
-<HR>
-<ADDRESS>
-Man(1) output converted with
-<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
-</ADDRESS>
+<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-resizeterm">resizeterm</a></li>
+<li><a href="#h3-resize_term">resize_term</a></li>
+<li><a href="#h3-is_term_resized">is_term_resized</a></li>
+</ul>
+</li>
+<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
+<li><a href="#h2-AUTHOR">AUTHOR</a></li>
+</ul>
+</div>
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