96 lines
4.9 KiB
Plaintext
96 lines
4.9 KiB
Plaintext
.\"***************************************************************************
|
|
.\" Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. *
|
|
.\" *
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining a *
|
|
.\" copy of this software and associated documentation files (the *
|
|
.\" "Software"), to deal in the Software without restriction, including *
|
|
.\" without limitation the rights to use, copy, modify, merge, publish, *
|
|
.\" distribute, distribute with modifications, sublicense, and/or sell *
|
|
.\" copies of the Software, and to permit persons to whom the Software is *
|
|
.\" furnished to do so, subject to the following conditions: *
|
|
.\" *
|
|
.\" The above copyright notice and this permission notice shall be included *
|
|
.\" in all copies or substantial portions of the Software. *
|
|
.\" *
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
|
|
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
|
|
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
|
|
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
|
|
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
|
|
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
.\" *
|
|
.\" Except as contained in this notice, the name(s) of the above copyright *
|
|
.\" holders shall not be used in advertising or otherwise to promote the *
|
|
.\" sale, use or other dealings in this Software without prior written *
|
|
.\" authorization. *
|
|
.\"***************************************************************************
|
|
.\"
|
|
.\" Author: Thomas E. Dickey 1996-on
|
|
.\"
|
|
.\" $Id: resizeterm.3x,v 1.17 2013/06/22 20:41:54 tom Exp $
|
|
.TH resizeterm 3X ""
|
|
.SH NAME
|
|
\fBis_term_resized\fR,
|
|
\fBresize_term\fR,
|
|
\fBresizeterm\fR \- change the curses terminal size
|
|
.SH SYNOPSIS
|
|
\fB#include <curses.h>\fR
|
|
.sp
|
|
\fBbool is_term_resized(int lines, int columns);\fR
|
|
.br
|
|
\fBint resize_term(int lines, int columns);\fR
|
|
.br
|
|
\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
|
|
such as the \fBLINES\fP and \fBCOLS\fP variables.
|
|
.LP
|
|
Most of the work is done by the inner function \fBresize_term\fR.
|
|
The outer function \fBresizeterm\fR adds bookkeeping for the SIGWINCH handler.
|
|
When resizing the windows,
|
|
\fBresize_term\fR blank-fills the areas that are extended.
|
|
The calling application should fill in these areas with appropriate data.
|
|
The \fBresize_term\fR 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.
|
|
.LP
|
|
A support function \fBis_term_resized\fR is provided so that applications
|
|
can check if the \fBresize_term\fR function would modify the window structures.
|
|
It returns TRUE if the windows would be modified, and FALSE otherwise.
|
|
.SH RETURN VALUE
|
|
Except as noted, these functions return
|
|
the integer \fBERR\fR upon failure and \fBOK\fR 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.
|
|
.SH NOTES
|
|
While these functions are intended to be used to support a signal handler
|
|
(i.e., for SIGWINCH), care should be taken to avoid invoking them 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 \fBungetch\fP'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.
|
|
.PP
|
|
If the environment variables \fBLINES\fP or \fBCOLUMNS\fP are set,
|
|
this overrides the library's use of the window size obtained from
|
|
the operating system.
|
|
Thus, even if a SIGWINCH is received,
|
|
no screen size change may be recorded.
|
|
.SH SEE ALSO
|
|
\fBcurs_getch\fR(3X),
|
|
\fBcurs_variables\fR(3X),
|
|
\fBwresize\fR(3X).
|
|
.SH AUTHOR
|
|
Thomas Dickey (from an equivalent function written in 1988 for BSD curses).
|