githubmirror/ncurses

menu/m_items.c
103 строки5 KB
Thomas E. Dickey
ncurses 4.2
01 мар 1998, 07:21
01 мар 1998, 07:21661078d
/****************************************************************************
 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
 *                                                                          *
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 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *   Author: Juergen Pfeifer <Juergen.Pfeifer@T-Online.de> 1995,1997        *
 ****************************************************************************/

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

#include "menu.priv.h"

MODULE_ID("$Id: m_items.c,v 1.6 1998/02/11 12:13:49 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
+--------------------------------------------------------------------------*/
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 arry of the menu
|
|   Return Values :  NULL on error
+--------------------------------------------------------------------------*/
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.
+--------------------------------------------------------------------------*/
int item_count(const MENU *menu)
{
  return(menu ? menu->nitems : -1);
}

/* m_items.c ends here */