contrib/ncurses-5.4/menu/m_item_val.c

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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 1.12 2003/11/08 20:51:29 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   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 +--------------------------------------------------------------------------*/
  96 NCURSES_EXPORT(bool)
  97 item_value (const ITEM *item)
  98 {
  99   return ((Normalize_Item(item)->value) ? TRUE : FALSE);
 100 }
 101
 102 /* m_item_val.c ends here */