установить и получить current_menu_item (set and get current_menu_item)
Имя (Name)
mitem_current - set and get current_menu_item
Синопсис (Synopsis)
#include <menu.h>
int set_current_item(MENU *menu, ITEM *item);
ITEM *current_item(const MENU *menu);
int set_top_row(MENU *menu, int row);
int top_row(const MENU *menu);
int item_index(const ITEM *item);
Описание (Description)
The function set_current_item sets the current item (the item on
which the menu cursor is positioned). current_item returns a
pointer to the current item in the given menu.
The function set_top_row sets the top row of the menu to show the
given row (the top row is initially 0, and is reset to this value
whenever the O_ROWMAJOR option is toggled). The item leftmost on
the given row becomes current. The function top_row returns the
number of the top menu row being displayed.
The function item_index returns the (zero-origin) index of item
in the menu's item pointer list.
Возвращаемое значение (Return value)
current_item returns a pointer (which may be NULL). It does not
set errno.
top_row and item_index return ERR (the general curses error
value) if their menu parameter is NULL.
set_current_item and set_top_row return one of the following:
E_OK The routine succeeded.
E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
E_BAD_STATE
Routine was called from an initialization or termination
function.
E_NOT_CONNECTED
No items are connected to the menu.
E_SYSTEM_ERROR
System error occurred (see errno(3)).
Смотри также (See also)
curses(3X), menu(3X).
Примечание (Note)
The header file <menu.h> automatically includes the header file
<curses.h>.
Портативность (Portability)
These routines emulate the System V menu library. They were not
supported on Version 7 or BSD versions.
The SVr4 menu library documentation specifies the top_row and
index_item error value as -1 (which is the value of ERR).
