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.\" $Id: menu.3x,v 1.19 2006/11/04 18:38:29 tom Exp $
.TH menu 3X ""
.SH NAME
\fBmenu\fR - curses extension for programming menus
.SH SYNOPSIS
\fB#include <menu.h>\fR
.br
.SH DESCRIPTION
The \fBmenu\fR library provides terminal-independent facilities for composing
menu systems on character-cell terminals.  The library includes: item routines,
which create and modify menu items; and menu routines, which group items into
menus, display menus on the screen, and handle interaction with the user.
.PP
The \fBmenu\fR library uses the \fBcurses\fR libraries, and a curses
initialization routine such as \fBinitscr\fR must be called before using any of
these functions.  To use the \fBmenu\fR library, link with the options
\fB-lmenu -lcurses\fR.
.
.SS Current Default Values for Item Attributes
.
The \fBmenu\fR library maintains a default value for item attributes.  You can
get or set this default by calling the appropriate \fBget_\fR or \fBset_\fR
routine with a \fBNULL\fR item pointer.  Changing this default with a
\fBset_\fR function affects future item creations, but does not change the
rendering of items already created.
.
.SS Routine Name Index
.
The following table lists each \fBmenu\fR routine and the name of
the manual page on which it is described.
.
.TS
l l .
\fBcurses\fR Routine Name	Manual Page Name
=
current_item	\fBmitem_current\fR(3X)
free_item 	\fBmitem_new\fR(3X)
free_menu 	\fBmenu_new\fR(3X)
item_count	\fBmenu_items\fR(3X)
item_description	\fBmitem_name\fR(3X)
item_index	\fBmitem_current\fR(3X)
item_init 	\fBmenu_hook\fR(3X)
item_name 	\fBmitem_name\fR(3X)
item_opts 	\fBmitem_opts\fR(3X)
item_opts_off	\fBmitem_opts\fR(3X)
item_opts_on	\fBmitem_opts\fR(3X)
item_term 	\fBmenu_hook\fR(3X)
item_userptr	\fBmitem_userptr\fR(3X)
item_value	\fBmitem_value\fR(3X)
item_visible	\fBmitem_visible\fR(3X)
menu_back 	\fBmenu_attributes\fR(3X)
menu_driver	\fBmenu_driver\fR(3X)
menu_fore 	\fBmenu_attributes\fR(3X)
menu_format	\fBmenu_format\fR(3X)
menu_grey 	\fBmenu_attributes\fR(3X)
menu_init 	\fBmenu_hook\fR(3X)
menu_items	\fBmenu_items\fR(3X)
menu_mark 	\fBmenu_mark\fR(3X)
menu_opts 	\fBmenu_opts\fR(3X)
menu_opts_off	\fBmenu_opts\fR(3X)
menu_opts_on	\fBmenu_opts\fR(3X)
menu_pad  	\fBmenu_attributes\fR(3X)
menu_pattern	\fBmenu_pattern\fR(3X)
menu_request_by_name	\fBmenu_requestname\fR(3X)
menu_request_name	\fBmenu_requestname\fR(3X)
menu_spacing	\fBmenu_spacing\fR(3X)
menu_sub  	\fBmenu_win\fR(3X)
menu_term 	\fBmenu_hook\fR(3X)
menu_userptr	\fBmenu_userptr\fR(3X)
menu_win  	\fBmenu_win\fR(3X)
new_item  	\fBmitem_new\fR(3X)
new_menu  	\fBmenu_new\fR(3X)
pos_menu_cursor	\fBmenu_cursor\fR(3X)
post_menu 	\fBmenu_post\fR(3X)
scale_menu	\fBmenu_win\fR(3X)
set_current_item	\fBmitem_current\fR(3X)
set_item_init	\fBmenu_hook\fR(3X)
set_item_opts	\fBmitem_opts\fR(3X)
set_item_term	\fBmenu_hook\fR(3X)
set_item_userptr	\fBmitem_userptr\fR(3X)
set_item_value	\fBmitem_value\fR(3X)
set_menu_back	\fBmenu_attributes\fR(3X)
set_menu_fore	\fBmenu_attributes\fR(3X)
set_menu_format	\fBmenu_format\fR(3X)
set_menu_grey	\fBmenu_attributes\fR(3X)
set_menu_init	\fBmenu_hook\fR(3X)
set_menu_items	\fBmenu_items\fR(3X)
set_menu_mark	\fBmenu_mark\fR(3X)
set_menu_opts	\fBmitem_opts\fR(3X)
set_menu_pad	\fBmenu_attributes\fR(3X)
set_menu_pattern	\fBmenu_pattern\fR(3X)
set_menu_spacing	\fBmenu_spacing\fR(3X)
set_menu_sub	\fBmenu_win\fR(3X)
set_menu_term	\fBmenu_hook\fR(3X)
set_menu_userptr	\fBmenu_userptr\fR(3X)
set_menu_win	\fBmenu_win\fR(3X)
set_top_row	\fBmitem_current\fR(3X)
top_row   	\fBmitem_current\fR(3X)
unpost_menu	\fBmenu_post\fR(3X)
.TE
.SH RETURN VALUE
Routines that return pointers return \fBNULL\fR on error.  Routines that return
an integer return one of the following error codes:
.TP 5
.B E_OK
The routine succeeded.
.TP 5
.B E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
.TP 5
.B E_BAD_STATE
Routine was called from an initialization or termination function.
.TP 5
.B E_NO_MATCH
Character failed to match.
.TP 5
.B E_NO_ROOM
Menu is too large for its window.
.TP 5
.B E_NOT_CONNECTED
No items are connected to the menu.
.TP 5
.B E_NOT_POSTED
The menu has not been posted.
.TP 5
.B E_NOT_SELECTABLE
The designated item cannot be selected.
.TP 5
.B E_POSTED
The menu is already posted.
.TP 5
.B E_REQUEST_DENIED
The menu driver could not process the request.
.TP 5
.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fR).
.TP 5
.B E_UNKNOWN_COMMAND
The menu driver code saw an unknown request code.
.SH SEE ALSO
\fBcurses\fR(3X) and related pages whose names begin "menu_" for detailed
descriptions of the entry points.
.SH NOTES
The header file \fB<menu.h>\fR automatically includes the header files
\fB<curses.h>\fR and \fB<eti.h>\fR.
.PP
In your library list, libmenu.a should be before libncurses.a; that is,
you want to say `-lmenu -lncurses', not the other way around (which would
usually give a link-error).
.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 ncurses by Eric
S. Raymond.
.SH SEE ALSO
This describes \fBncurses\fR
version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch @NCURSES_PATCH@).
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