m_item_val.c revision 76726 
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28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_item_val                                                        *
35* Set and get menus item values                                            *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_item_val.c,v 1.9 2000/12/10 02:16:48 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  int set_item_value(ITEM *item, int value)
45|
46|   Description   :  Programmatically set the items selection value. This is
47|                    only allowed if the item is selectable at all and if
48|                    it is not connected to a single-valued menu.
49|                    If the item is connected to a posted menu, the menu
50|                    will be redisplayed.
51|
52|   Return Values :  E_OK              - success
53|                    E_REQUEST_DENIED  - not selectable or single valued menu
54+--------------------------------------------------------------------------*/
55NCURSES_EXPORT(int)
56set_item_value (ITEM *item, bool value)
57{
58  MENU *menu;
59
60  if (item)
61    {
62      menu = item->imenu;
63
64      if ((!(item->opt & O_SELECTABLE)) ||
65	  (menu && (menu->opt & O_ONEVALUE)))
66	RETURN(E_REQUEST_DENIED);
67
68      if (item->value ^ value)
69	{
70	  item->value = value ? TRUE : FALSE;
71	  if (menu)
72	    {
73	      if (menu->status & _POSTED)
74		{
75		  Move_And_Post_Item(menu,item);
76		  _nc_Show_Menu(menu);
77		}
78	    }
79	}
80    }
81  else
82    _nc_Default_Item.value = value;
83
84  RETURN(E_OK);
85}
86
87/*---------------------------------------------------------------------------
88|   Facility      :  libnmenu
89|   Function      :  bool item_value(const ITEM *item)
90|
91|   Description   :  Return the selection value of the item
92|
93|   Return Values :  TRUE   - if item is selected
94|                    FALSE  - if item is not selected
95+--------------------------------------------------------------------------*/
96NCURSES_EXPORT(bool)
97item_value (const ITEM *item)
98{
99  return ((Normalize_Item(item)->value) ? TRUE : FALSE);
100}
101
102/* m_item_val.c ends here */
103