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.\" $OpenBSD: mitem_value.3,v 1.5 2023/10/17 09:52:10 nicm Exp $
.\"
.\"***************************************************************************
.\" Copyright 2018-2022,2023 Thomas E. Dickey *
.\" Copyright 1998-2010,2015 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. *
.\"***************************************************************************
.\"
.\" $Id: mitem_value.3,v 1.5 2023/10/17 09:52:10 nicm Exp $
.TH mitem_value 3 2023-07-01 "ncurses 6.4" "Library calls"
.SH NAME
\fBset_item_value\fP,
\fBitem_value\fP \- set and get menu item values
.SH SYNOPSIS
\fB#include <menu.h>\fP
.sp
\fBint set_item_value(ITEM *\fIitem\fB, bool \fIvalue\fB);\fR
.br
\fBbool item_value(const ITEM *\fIitem\fB);\fR
.SH DESCRIPTION
If you turn off the menu option \fBO_ONEVALUE\fP (e.g., with
\fBset_menu_opts\fP or \fBmenu_opts_off\fP; see \fBmenu_opts\fP(3)), the menu
becomes multi-valued; that is, more than one item may simultaneously be
selected.
.PP
In a multi_valued menu, you can used \fBset_item_value\fP to select the
given menu item (second argument \fBTRUE\fP) or deselect it (second argument
\fBFALSE\fP).
.SH RETURN VALUE
The function \fBset_item_value\fP returns one of the following:
.TP 5
.B E_OK
The routine succeeded.
.TP 5
.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fP(3)).
.TP 5
.B E_REQUEST_DENIED
The menu driver could not process the request.
.SH SEE ALSO
\fBcurses\fP(3), \fBmenu\fP(3).
.SH NOTES
The header file \fB<menu.h>\fP automatically includes the header file
\fB<curses.h>\fP.
.SH PORTABILITY
These routines emulate the System V menu library.
They were not supported on
Version 7 or BSD versions.
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.
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