freebsd-dev/contrib/ncurses/man/resizeterm.3x
Peter Wemm 0e3d540892 Import unmodified (but trimmed) ncurses 5.0 prerelease 990821.
This contains the full eti (panel, form, menu) extensions.
bmake glue to follow.

Obtained from:	ftp://ftp.clark.net/pub/dickey/ncurses
1999-08-24 01:06:48 +00:00

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.\" Author: Thomas E. Dickey <dickey@clark.net> 1996,1997
.\"
.\" $Id: resizeterm.3x,v 1.7 1998/03/14 23:42:52 tom Exp $
.TH resizeterm 3X ""
.SH NAME
\fBresizeterm\fR - change the curses terminal size
..
.SH SYNOPSIS
\fB#include <curses.h>\fR
\fBint resizeterm(int lines, int columns);\fR
..
.SH DESCRIPTION
This is an extension to the curses library.
It provides callers with a hook into the \fBncurses\fR data to resize windows,
primarily for use by programs running in an X Window terminal (e.g., xterm).
The function \fBresizeterm\fR resizes the standard and current windows
to the specified dimensions, and adjusts other bookkeeping data used by
the \fBncurses\fR library that record the window dimensions.
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.
..
.SH RETURN VALUE
The function returns the integer \fBERR\fR upon failure and \fBOK\fR 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.
..
.SH NOTES
While this function is 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 \fBmalloc\fR or \fBrealloc\fR may have been interrupted,
since it uses those functions.
..
.PP
If ncurses is configured to supply its own SIGWINCH handler,
the \fBresizeterm\fR function ungetch's a \fBKEY_RESIZE\fR which
will be read on the next call to \fBgetch\fR.
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.
..
.SH SEE ALSO
\fBwresize\fR(3X).
..
.SH AUTHOR
Thomas Dickey (from an equivalent function written in 1988 for BSD curses).
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