ncurses 6.2 - patch 20200425

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

diff --git a/man/curs_getyx.3x b/man/curs_getyx.3x
index d83cce74db0f0f78c641cb690514eed3fc3c3b14..d12c06419bbb4a4e43d21993b7010c8c0e12589d 100644 (file)
--- a/man/curs_getyx.3x
+++ b/man/curs_getyx.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
 .\"***************************************************************************

-.\" Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
+.\" Copyright 2020 Thomas E. Dickey                                          *
+.\" Copyright 1998-2007,2010 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            *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *


@@ -26,13 +27,13 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"

-.\" $Id: curs_getyx.3x,v 1.14 2007/03/17 20:22:45 tom Exp $
+.\" $Id: curs_getyx.3x,v 1.19 2020/02/02 23:34:34 tom Exp $

 .TH curs_getyx 3X ""
 .SH NAME
 \fBgetyx\fR,
 \fBgetparyx\fR,
 \fBgetbegyx\fR,
 .TH curs_getyx 3X ""
 .SH NAME
 \fBgetyx\fR,
 \fBgetparyx\fR,
 \fBgetbegyx\fR,

-\fBgetmaxyx\fR - get \fBcurses\fR cursor and window coordinates
+\fBgetmaxyx\fR \- get \fBcurses\fR cursor and window coordinates

 .SH SYNOPSIS
 \fB#include <curses.h>\fR
 .sp
 .SH SYNOPSIS
 \fB#include <curses.h>\fR
 .sp


@@ -51,7 +52,7 @@ the two integer variables \fIy\fR and \fIx\fR.
 If \fIwin\fR is a subwindow, the \fBgetparyx\fR macro places the beginning
 coordinates of the subwindow relative to the parent window into two integer
 variables \fIy\fR and \fIx\fR.
 If \fIwin\fR is a subwindow, the \fBgetparyx\fR macro places the beginning
 coordinates of the subwindow relative to the parent window into two integer
 variables \fIy\fR and \fIx\fR.

-Otherwise, \fB-1\fR is placed into \fIy\fR and \fIx\fR.
+Otherwise, \fB\-1\fR is placed into \fIy\fR and \fIx\fR.

 .PP
 Like \fBgetyx\fR, the \fBgetbegyx\fR and \fBgetmaxyx\fR macros store
 the current beginning coordinates and size of the specified window.
 .PP
 Like \fBgetyx\fR, the \fBgetbegyx\fR and \fBgetmaxyx\fR macros store
 the current beginning coordinates and size of the specified window.


@@ -69,7 +70,7 @@ The
 \fBgetmaxyx\fR
 macros are described in the XSI Curses standard, Issue 4.
 .PP
 \fBgetmaxyx\fR
 macros are described in the XSI Curses standard, Issue 4.
 .PP

-This implementation also provides
+This implementation also provides functions

 \fBgetbegx\fR,
 \fBgetbegy\fR,
 \fBgetcurx\fR,
 \fBgetbegx\fR,
 \fBgetbegy\fR,
 \fBgetcurx\fR,


@@ -79,11 +80,22 @@ This implementation also provides
 \fBgetparx\fR and
 \fBgetpary\fR
 for compatibility with older versions of curses.
 \fBgetparx\fR and
 \fBgetpary\fR
 for compatibility with older versions of curses.

+.PP
+Although X/Open Curses does not address this,
+many implementations provide members of the WINDOW structure
+containing values corresponding to these macros.
+For best portability, do not rely on using the data in WINDOW,
+since some implementations make WINDOW opaque (do not allow
+direct use of its members).
+.PP
+Besides the problem of opaque structures,
+the data stored in like-named members may not have like-values in
+different implementations.
+For example, the WINDOW._maxx and WINDOW._maxy values in ncurses
+have (at least since release 1.8.1) differed by one from some
+other implementations.
+The difference is hidden by means of the macro \fBgetmaxyx\fP.

 .SH SEE ALSO
 .SH SEE ALSO

-\fBcurses\fR(3X)
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End:
+\fBcurses\fR(3X),
+\fBcurs_legacy\fR(3X),
+\fBcurs_opaque\fR(3X)