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Интерактивная система просмотра системных руководств (man-ов)

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item_index (3)
  • >> item_index (3) ( FreeBSD man: Библиотечные вызовы )
  • item_index (3) ( Linux man: Библиотечные вызовы )
  •  

    NAME

    mitem_current - set and get current_menu_item
     
    

    SYNOPSIS

    #include <menu.h>
    int set_current_item(MENU *menu, const 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);
     

    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.  

    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).
     

    SEE ALSO

    curses(3X), menu(3X).  

    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.

    The SVr4 menu library documentation specifies the top_row and index_item error value as -1 (which is the value of ERR).  

    AUTHORS

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


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    SEE ALSO
    NOTES
    PORTABILITY
    AUTHORS


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