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 return
one of the following:
- E_OK
- The routine succeeded.
- E_SYSTEM_ERROR
- System error occurred (see errno).
SEE ALSO¶
ncurses(3NCURSES),
menu(3MENU).
NOTES¶
The header file
<menu.h> automatically includes the header file
<curses.h>.
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.