ncurses 6.2 - patch 20210109

[ncurses.git] / man / resizeterm.3x

diff --git a/man/resizeterm.3x b/man/resizeterm.3x
index b88f68f351ff23a059271aaba3e97248e894cadd..ae5106e1d0b0dc1c5252da72e0a0fa5501ead922 100644 (file)
--- a/man/resizeterm.3x
+++ b/man/resizeterm.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998-2013,2015 Free Software Foundation, Inc.              *
+.\" Copyright 2018-2019,2020 Thomas E. Dickey                                *
+.\" Copyright 1998-2015,2017 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            *
@@ -28,10 +29,11 @@
 .\"
 .\" Author: Thomas E. Dickey 1996-on
 .\"
-.\" $Id: resizeterm.3x,v 1.21 2015/09/26 19:55:32 tom Exp $
+.\" $Id: resizeterm.3x,v 1.28 2020/10/17 23:55:41 tom Exp $
 .TH resizeterm 3X ""
 .de bP
-.IP \(bu 4
+.ie n  .IP \(bu 4
+.el    .IP \(bu 2
 ..
 .SH NAME
 \fBis_term_resized\fR,
@@ -40,11 +42,11 @@
 .SH SYNOPSIS
 \fB#include <curses.h>\fR
 .sp
-\fBbool is_term_resized(int lines, int columns);\fR
+\fBbool is_term_resized(int \fP\fIlines\fP\fB, int \fP\fIcolumns\fP\fB);\fR
 .br
-\fBint resize_term(int lines, int columns);\fR
+\fBint resize_term(int \fP\fIlines\fP\fB, int \fP\fIcolumns\fP\fB);\fR
 .br
-\fBint resizeterm(int lines, int columns);\fR
+\fBint resizeterm(int \fP\fIlines\fP\fB, int \fP\fIcolumns\fP\fB);\fR
 .SH DESCRIPTION
 .PP
 This is an extension to the curses library.
@@ -59,19 +61,31 @@ such as the \fBLINES\fP and \fBCOLS\fP variables.
 .SS resize_term
 .PP
 Most of the work is done by the inner function \fBresize_term\fR.
-The outer function \fBresizeterm\fR adds bookkeeping for the SIGWINCH handler.
+The outer function \fBresizeterm\fR adds bookkeeping
+for the \fBSIGWINCH\fP handler,
+as well as repainting the soft-key area (see \fBslk_touch\fP(3X)).
+.PP
 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.
+.PP
 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.
+.PP
+When resizing windows, \fBresize_term\fR recursively adjusts subwindows,
+keeping them within the updated parent window's limits.
+If a top-level window happens to extend to the screen's limits,
+then on resizing the window, \fBresize_term\fR will keep the window
+extending to the corresponding limit, regardless of whether the
+screen has shrunk or grown.
 .SS is_term_resized
 .PP
 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 \fBTRUE\fP if the windows would be modified, and \fBFALSE\fP otherwise.
+It returns \fBTRUE\fP if the windows would be modified,
+and \fBFALSE\fP otherwise.
 .SH RETURN VALUE
 Except as noted, these functions return
 the integer \fBERR\fR upon failure and \fBOK\fR on success.
@@ -79,15 +93,15 @@ 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
+(i.e., for \fBSIGWINCH\fP), 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,
+If ncurses is configured to supply its own \fBSIGWINCH\fP handler,
 .bP
-on receipt of a SIGWINCH, the handler sets a flag
+on receipt of a \fBSIGWINCH\fP, the handler sets a flag
 .bP
-which is tested in \fBwgetch\fP and \fBdoupdate\fP,
+which is tested in \fBwgetch\fP(3X) and \fBdoupdate\fP,
 .bP
 in turn, calling the \fBresizeterm\fR function,
 .bP
@@ -106,7 +120,7 @@ data structures.
 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,
+Thus, even if a \fBSIGWINCH\fP is received,
 no screen size change may be recorded.
 .SH PORTABILITY
 .PP