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menu_hook - set hooks for automatic invocation by applications |
#include <menu.h> |
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). |
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). |
curses(3X), menu(3X). |
The header file <menu.h> automatically includes the header file <curses.h>. |
These routines emulate the System V menu library. They were not supported on Version 7 or BSD versions. |
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond. |