/****************************************************************************
 * Copyright (c) 1998,2000 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.                   *
 *                                                                          *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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 ****************************************************************************/

/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 *   Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en             *
 ****************************************************************************/

/***************************************************************************
* Module m_item_val                                                        *
* Set and get menus item values                                            *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_item_val.c,v 1.10 2002/07/06 15:22:16 juergen Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  int set_item_value(ITEM *item, int value)
|   
|   Description   :  Programmatically set the items selection value. This is
|                    only allowed if the item is selectable at all and if
|                    it is not connected to a single-valued menu.
|                    If the item is connected to a posted menu, the menu
|                    will be redisplayed.  
|
|   Return Values :  E_OK              - success
|                    E_REQUEST_DENIED  - not selectable or single valued menu
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_item_value (ITEM *item, bool value)
{
  MENU *menu;
  
  if (item)
    {
      menu = item->imenu;
      
      if ((!(item->opt & O_SELECTABLE)) ||
	  (menu && (menu->opt & O_ONEVALUE))) 
	RETURN(E_REQUEST_DENIED);
      
      if (item->value ^ value)
	{
	  item->value = value ? TRUE : FALSE;
	  if (menu)
	    {
	      if (menu->status & _POSTED)
		{
		  Move_And_Post_Item(menu,item);
		  _nc_Show_Menu(menu);
		}
	    }
	}
    }
  else
    _nc_Default_Item.value = value;
  
  RETURN(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  bool item_value(const ITEM *item)
|   
|   Description   :  Return the selection value of the item
|
|   Return Values :  TRUE   - if item is selected
|                    FALSE  - if item is not selected
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(bool)
item_value (const ITEM *item)
{
  return ((Normalize_Item(item)->value) ? TRUE : FALSE);
}

/* m_item_val.c ends here */
