hook(3MENU) Library calls hook(3MENU)
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
various points in the automatic processing of input event codes by
menu_driver.
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 re-
turn 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 sup-
ported on Version 7 or BSD versions.
AUTHORS
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S.
Raymond.
SEE ALSO
ncurses(3NCURSES), menu(3MENU)
ncurses 6.5 2024-12-28 hook(3MENU)
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