githubmirror/ncurses

menu/m_items.c
106 строк5 KB
Thomas E. Dickey
ncurses 5.4
09 фев 2004, 05:15
09 фев 2004, 05:15a8987e7
/****************************************************************************
 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

/***************************************************************************
* Module m_items                                                           *
* Connect and disconnect items to and from menus                           *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_items.c,v 1.12 2003/11/08 20:50:58 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  int set_menu_items(MENU *menu, ITEM **items)
|   
|   Description   :  Sets the item pointer array connected to menu.
|
|   Return Values :  E_OK           - success
|                    E_POSTED       - menu is already posted
|                    E_CONNECTED    - one or more items are already connected
|                                     to another menu.
|                    E_BAD_ARGUMENT - An incorrect menu or item array was
|                                     passed to the function
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_menu_items (MENU * menu, ITEM ** items)
{
  if (!menu || (items && !(*items)))
    RETURN(E_BAD_ARGUMENT);
  
  if ( menu->status & _POSTED )
    RETURN(E_POSTED);
  
  if (menu->items)
    _nc_Disconnect_Items(menu);
  
  if (items)
    {
      if(!_nc_Connect_Items( menu, items )) 
	RETURN(E_CONNECTED);
    }
  
  menu->items = items;
  RETURN(E_OK);
}		

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  ITEM **menu_items(const MENU *menu)
|   
|   Description   :  Returns a pointer to the item pointer array of the menu
|
|   Return Values :  NULL on error
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(ITEM **)
menu_items (const MENU *menu)
{
  return(menu ? menu->items : (ITEM **)0);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  int item_count(const MENU *menu)
|   
|   Description   :  Get the number of items connected to the menu. If the
|                    menu pointer is NULL we return -1.         
|
|   Return Values :  Number of items or -1 to indicate error.
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
item_count (const MENU *menu)
{
  return(menu ? menu->nitems : -1);
}

/* m_items.c ends here */