xref: /freebsd/contrib/ncurses/menu/m_item_val.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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28 
29 /****************************************************************************
30  *   Author:  Juergen Pfeifer, 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 
40 MODULE_ID("$Id: m_item_val.c,v 1.14 2004/12/11 23:29:34 tom Exp $")
41 
42 /*---------------------------------------------------------------------------
43 |   Facility      :  libnmenu
44 |   Function      :  int set_item_value(ITEM *item, int value)
45 |
46 |   Description   :  Programmatically set the item's 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 +--------------------------------------------------------------------------*/
55 NCURSES_EXPORT(int)
56 set_item_value(ITEM * item, bool value)
57 {
58   MENU *menu;
59 
60   T((T_CALLED("set_item_value(%p,%d)"), item, value));
61   if (item)
62     {
63       menu = item->imenu;
64 
65       if ((!(item->opt & O_SELECTABLE)) ||
66 	  (menu && (menu->opt & O_ONEVALUE)))
67 	RETURN(E_REQUEST_DENIED);
68 
69       if (item->value ^ value)
70 	{
71 	  item->value = value ? TRUE : FALSE;
72 	  if (menu)
73 	    {
74 	      if (menu->status & _POSTED)
75 		{
76 		  Move_And_Post_Item(menu, item);
77 		  _nc_Show_Menu(menu);
78 		}
79 	    }
80 	}
81     }
82   else
83     _nc_Default_Item.value = value;
84 
85   RETURN(E_OK);
86 }
87 
88 /*---------------------------------------------------------------------------
89 |   Facility      :  libnmenu
90 |   Function      :  bool item_value(const ITEM *item)
91 |
92 |   Description   :  Return the selection value of the item
93 |
94 |   Return Values :  TRUE   - if item is selected
95 |                    FALSE  - if item is not selected
96 +--------------------------------------------------------------------------*/
97 NCURSES_EXPORT(bool)
98 item_value(const ITEM * item)
99 {
100   T((T_CALLED("item_value(%p)"), item));
101   returnBool((Normalize_Item(item)->value) ? TRUE : FALSE);
102 }
103 
104 /* m_item_val.c ends here */
105