.\"	$NetBSD: menu_opts.3,v 1.11 2019/07/01 07:16:25 wiz Exp $
.\"
.\" Copyright (c) 1999
.\"	Brett Lymn - blymn@baea.com.au, brett_lymn@yahoo.com.au
.\"
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.Dd June 30, 2019
.Dt MENU_OPTS 3
.Os
.Sh NAME
.Nm menu_opts ,
.Nm menu_opts_off ,
.Nm menu_opts_on ,
.Nm set_menu_opts
.Nd get or modify options for a menu
.Sh LIBRARY
.Lb libmenu
.Sh SYNOPSIS
.In menu.h
.Ft OPTIONS
.Fn menu_opts "MENU *menu"
.Ft int
.Fn menu_opts_off "MENU *menu" "OPTIONS opts"
.Ft int
.Fn menu_opts_on "MENU *menu" "OPTIONS opts"
.Ft int
.Fn set_menu_opts "MENU *menu" "OPTIONS opts"
.Sh DESCRIPTION
The
.Fn menu_opts
function returns the current options set for the menu given.
The
.Fn menu_opts_off
function turns off the menu options given by the opts parameter for
the menu.
The
.Fn menu_opts_on
function turns on the menu options given by the opts parameter for the
menu passed.
The
.Fn set_menu_opts
sets the menu options to the value given in opts.
Options may be logigally ORed together.
Valid options are:
.Bl -column -offset indent ".Sy Option" ".Sy Meaning"
.It Sy Option Ta Sy Meaning
.It Dv O_ONEVALUE Ta The menu may only have one item selected at a time.
The menu mark will indicate the current item.
If this option is off then multiple menu items may be selected and
the menu mark will be displayed on each selected item.
.El
.Sh RETURN VALUES
The functions return one of the following error values:
.Pp
.Bl -tag -width E_BAD_ARGUMENT -compact
.It Er E_OK
The function was successful.
.It Er E_BAD_ARGUMENT
One or more of the arguments passed to the function was incorrect.
.It Er E_POSTED
The menu is already posted.
.El
.Sh SEE ALSO
.Xr curses 3 ,
.Xr menus 3
.Sh NOTES
The header
.Aq Pa menu.h
automatically includes both
.Aq Pa curses.h
and
.Aq Pa eti.h .