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menu_hook(3X)			  Library calls 		   menu_hook(3X)

NAME
     menu_hook - set hooks for automatic invocation by applications

SYNOPSIS
     #include <menu.h>

     int set_item_init(MENU *menu, Menu_Hook func);
     Menu_Hook item_init(const MENU *menu);

     int set_item_term(MENU *menu, Menu_Hook func);
     Menu_Hook item_term(const MENU *menu);

     int set_menu_init(MENU *menu, Menu_Hook func);
     Menu_Hook menu_init(const MENU *menu);

     int set_menu_term(MENU *menu, Menu_Hook func);
     Menu_Hook menu_term(const MENU *menu);

DESCRIPTION
     These functions make it possible to set hook functions to be called at var-
     ious  points  in the automatic processing of input event codes by menu_dri-
     ver.

     The function set_item_init sets a hook to be called at menu-post  time  and
     each  time the selected item changes (after the change).  item_init returns
     the current item init hook, if any (NULL if there is no such hook).

     The function set_item_term sets a hook to be called at menu-unpost time and
     each time the selected item changes (before the change).  item_term returns
     the current item term hook, if any (NULL if there is no such hook).

     The function set_menu_init sets a hook to be called at menu-post  time  and
     just  after  the  top row on the menu changes once it is posted.  menu_init
     returns the current menu init hook, if any (NULL if there is no such hook).

     The function set_menu_term sets a hook to be called at menu-unpost time and
     just before the top row on the menu changes once it is  posted.   menu_term
     returns the current menu term hook, if any (NULL if there is no such hook).

RETURN VALUE
     Routines  that return pointers return NULL on error.  Other routines return
     one of the following:

     E_OK
	  The routine succeeded.

     E_SYSTEM_ERROR
	  System error occurred (see errno(3)).

PORTABILITY
     These routines emulate the System V menu library.	They were not  supported
     on Version 7 or BSD versions.

AUTHORS
     Juergen  Pfeifer.	 Manual  pages	and adaptation for new curses by Eric S.
     Raymond.

SEE ALSO
     curses(3X), menu(3X)

ncurses 6.5			   2024-12-28			   menu_hook(3X)

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