m_item_opt.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_opt                                                        *
35* Menus item option routines                                               *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_item_opt.c,v 1.11 2000/12/10 02:16:48 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+--------------------------------------------------------------------------*/
53NCURSES_EXPORT(int)
54set_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+--------------------------------------------------------------------------*/
94NCURSES_EXPORT(int)
95item_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 behaviour */
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+--------------------------------------------------------------------------*/
119NCURSES_EXPORT(int)
120item_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 behaviour */
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+--------------------------------------------------------------------------*/
144NCURSES_EXPORT(Item_Options)
145item_opts (const ITEM * item)
146{
147  return (ALL_ITEM_OPTS & Normalize_Item(item)->opt);
148}
149
150/* m_item_opt.c ends here */
151