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.\" $Id: mitem_value.3x,v 1.32 2024/03/16 15:35:01 tom Exp $
.TH menu_value 3MENU 2024-03-16 "ncurses 6.4" "Library calls"
.SH NAME
\fBset_item_value\fP,
\fBitem_value\fP \-
set and get menu item values
.SH SYNOPSIS
.nf
\fB#include <menu.h>
.PP
\fBint set_item_value(ITEM *\fIitem\fP, bool \fIvalue\fP);
\fBbool item_value(const ITEM *\fIitem\fP);
.fi
.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 \fB\%opts\fP(3MENU)), 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 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.
.SH SEE ALSO
\fB\%ncurses\fP(3NCURSES),
\fB\%menu\fP(3MENU)