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Revision 1.11, Wed Apr 16 13:35:11 2003 UTC (21 years ago) by wiz
Branch: MAIN
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Changes since 1.10: +2 -2 lines 

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

.\"	$NetBSD: menu_item_value.3,v 1.11 2003/04/16 13:35:11 wiz Exp $ .\"
.\" Copyright (c) 1999
.\"	Brett Lymn - blymn@baea.com.au, brett_lymn@yahoo.com.au
.\"
.\" This code is donated to The NetBSD Foundation by the author.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. The name of the Author may not be used to endorse or promote
.\"    products derived from this software without specific prior written
.\"    permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd September 10, 1999
.Dt MENU_ITEM_VALUE 3
.Os
.Sh NAME
.Nm item_value ,
.Nm set_item_value ,
.Nm item_selected
.Nd get or set value for an item
.Sh LIBRARY
.Lb libmenu
.Sh SYNOPSIS
.In menu.h
.Ft int
.Fn item_value "ITEM *item"
.Ft int
.Fn set_item_value "ITEM *item" "int flag"
.Ft int
.Fn item_selected "MENU *menu" "int **array"
.Sh DESCRIPTION
The
.Fn item_value
function returns value of the item.
If the item has been selected then this value will be TRUE.
The value can also be set by calling
.Fn set_item_value
to set the value to a defined state.
Setting the value to a value
other than TRUE or FALSE will have undefined results.
The
.Fn item_selected
function returns the number of items that are selected in the menu, that
is the number of items whose value is TRUE.
The indexes of the selected
items will be returned in
.Fa array
which will be dynamically allocated to hold the number of indexes.
It is the responsibility of the caller to release this storage by calling
.Xr free 3
when the storage is no longer required.
If there are no elements selected in the items array then
.Fn item_selected
will return 0 and
.Fa array
will be NULL.
If an error occurs
.Fn item_selected
will return one of the below return values which are less than 0.
.Sh RETURN VALUES
The functions return one of the following error values:
.Pp
.Bl -tag -width E_REQUEST_DENIED -compact
.It Er E_OK
The function was successful.
.It Er E_NOT_CONNECTED
The item is not connected to a menu.
.It Er E_REQUEST_DENIED
The menu driver could not process the request.
.It Er E_SYSTEM_ERROR
A system error occurred whilst processing the request.
.El
.Sh SEE ALSO
.Xr curses 3 ,
.Xr menus 3
.Sh NOTES
The header
.Pa \*[Lt]menu.h\*[Gt]
automatically includes both
.Pa \*[Lt]curses.h\*[Gt]
and
.Pa \*[Lt]eti.h\*[Gt] .
.Pp
The function
.Fn item_selected
is a
.Nx
extension and must not be used in portable code.