m_item_cur.c revision 76726 
1/****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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14 *                                                                          *
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28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_item_cur                                                        *
35* Set and get current menus item                                           *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_item_cur.c,v 1.12 2000/12/10 02:16:48 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  int set_current_item(MENU *menu, const ITEM *item)
45|
46|   Description   :  Make the item the current item
47|
48|   Return Values :  E_OK                - success
49+--------------------------------------------------------------------------*/
50NCURSES_EXPORT(int)
51set_current_item (MENU * menu, ITEM * item)
52{
53  if (menu && item && (item->imenu==menu))
54    {
55      if ( menu->status & _IN_DRIVER )
56	RETURN(E_BAD_STATE);
57
58      assert( menu->curitem );
59      if (item != menu->curitem)
60	{
61	  if (menu->status & _LINK_NEEDED)
62	    {
63	      /*
64	       * Items are available, but they are not linked together.
65	       * So we have to link here.
66	       */
67	      _nc_Link_Items(menu);
68	    }
69	  assert(menu->pattern);
70	  Reset_Pattern(menu);
71	  /* adjust the window to make item visible and update the menu */
72	  Adjust_Current_Item(menu,menu->toprow,item);
73	}
74    }
75  else
76    RETURN(E_BAD_ARGUMENT);
77
78  RETURN(E_OK);
79}
80
81/*---------------------------------------------------------------------------
82|   Facility      :  libnmenu
83|   Function      :  ITEM *current_item(const MENU *menu)
84|
85|   Description   :  Return the menus current item
86|
87|   Return Values :  Item pointer or NULL if failure
88+--------------------------------------------------------------------------*/
89NCURSES_EXPORT(ITEM *)
90current_item (const MENU * menu)
91{
92  return (menu && menu->items) ? menu->curitem : (ITEM *)0;
93}
94
95/*---------------------------------------------------------------------------
96|   Facility      :  libnmenu
97|   Function      :  int item_index(const ITEM *)
98|
99|   Description   :  Return the logical index of this item.
100|
101|   Return Values :  The index or ERR if this is an invalid item pointer
102+--------------------------------------------------------------------------*/
103NCURSES_EXPORT(int)
104item_index (const ITEM *item)
105{
106  return (item && item->imenu) ? item->index : ERR;
107}
108
109/* m_item_cur.c ends here */
110