contrib/ncurses-5.4/menu/m_item_opt.c

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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_item_opt                                                        *
  35 * Menus item option routines                                               *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_item_opt.c,v 1.14 2003/11/08 20:50:19 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  int set_item_opts(ITEM *item, Item_Options opts)
  45 |
  46 |   Description   :  Set the options of the item. If there are relevant
  47 |                    changes, the item is connected and the menu is posted,
  48 |                    the menu will be redisplayed.
  49 |
  50 |   Return Values :  E_OK            - success
  51 |                    E_BAD_ARGUMENT  - invalid item options
  52 +--------------------------------------------------------------------------*/
  53 NCURSES_EXPORT(int)
  54 set_item_opts (ITEM *item, Item_Options opts)
  55 {
  56   opts &= ALL_ITEM_OPTS;
  57
  58   if (opts & ~ALL_ITEM_OPTS)
  59     RETURN(E_BAD_ARGUMENT);
  60
  61   if (item)
  62     {
  63       if (item->opt != opts)
  64         {
  65           MENU *menu = item->imenu;
  66
  67           item->opt = opts;
  68
  69           if ((!(opts & O_SELECTABLE)) && item->value)
  70             item->value = FALSE;
  71
  72           if (menu && (menu->status & _POSTED))
  73             {
  74               Move_And_Post_Item( menu, item );
  75               _nc_Show_Menu(menu);
  76             }
  77         }
  78     }
  79   else
  80     _nc_Default_Item.opt = opts;
  81
  82   RETURN(E_OK);
  83 }
  84
  85 /*---------------------------------------------------------------------------
  86 |   Facility      :  libnmenu
  87 |   Function      :  int item_opts_off(ITEM *item, Item_Options opts)
  88 |
  89 |   Description   :  Switch of the options for this item.
  90 |
  91 |   Return Values :  E_OK            - success
  92 |                    E_BAD_ARGUMENT  - invalid options
  93 +--------------------------------------------------------------------------*/
  94 NCURSES_EXPORT(int)
  95 item_opts_off (ITEM *item, Item_Options  opts)
  96 {
  97   ITEM *citem = item; /* use a copy because set_item_opts must detect
  98                          NULL item itself to adjust its behavior */
  99
 100   if (opts & ~ALL_ITEM_OPTS)
 101     RETURN(E_BAD_ARGUMENT);
 102   else
 103     {
 104       Normalize_Item(citem);
 105       opts = citem->opt & ~(opts & ALL_ITEM_OPTS);
 106       return set_item_opts( item, opts );
 107     }
 108 }
 109
 110 /*---------------------------------------------------------------------------
 111 |   Facility      :  libnmenu
 112 |   Function      :  int item_opts_on(ITEM *item, Item_Options opts)
 113 |
 114 |   Description   :  Switch on the options for this item.
 115 |
 116 |   Return Values :  E_OK            - success
 117 |                    E_BAD_ARGUMENT  - invalid options
 118 +--------------------------------------------------------------------------*/
 119 NCURSES_EXPORT(int)
 120 item_opts_on (ITEM *item, Item_Options opts)
 121 {
 122   ITEM *citem = item; /* use a copy because set_item_opts must detect
 123                          NULL item itself to adjust its behavior */
 124
 125   opts &= ALL_ITEM_OPTS;
 126   if (opts & ~ALL_ITEM_OPTS)
 127     RETURN(E_BAD_ARGUMENT);
 128   else
 129     {
 130       Normalize_Item(citem);
 131       opts = citem->opt | opts;
 132       return set_item_opts( item, opts );
 133     }
 134 }
 135
 136 /*---------------------------------------------------------------------------
 137 |   Facility      :  libnmenu
 138 |   Function      :  Item_Options item_opts(const ITEM *item)
 139 |
 140 |   Description   :  Switch of the options for this item.
 141 |
 142 |   Return Values :  Items options
 143 +--------------------------------------------------------------------------*/
 144 NCURSES_EXPORT(Item_Options)
 145 item_opts (const ITEM * item)
 146 {
 147   return (ALL_ITEM_OPTS & Normalize_Item(item)->opt);
 148 }
 149
 150 /* m_item_opt.c ends here */