contrib/ncurses-5.4/menu/m_opts.c

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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_opts                                                            *
  35 * Menus option routines                                                    *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_opts.c,v 1.16 2003/11/08 20:50:19 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  int set_menu_opts(MENU *menu, Menu_Options opts)
  45 |
  46 |   Description   :  Set the options for this menu. If the new settings
  47 |                    end up in a change of the geometry of the menu, it
  48 |                    will be recalculated. This operation is forbidden if
  49 |                    the menu is already posted.
  50 |
  51 |   Return Values :  E_OK           - success
  52 |                    E_BAD_ARGUMENT - invalid menu options
  53 |                    E_POSTED       - menu is already posted
  54 +--------------------------------------------------------------------------*/
  55 NCURSES_EXPORT(int)
  56 set_menu_opts (MENU * menu, Menu_Options opts)
  57 {
  58   opts &= ALL_MENU_OPTS;
  59
  60   if (opts & ~ALL_MENU_OPTS)
  61     RETURN(E_BAD_ARGUMENT);
  62
  63   if (menu)
  64     {
  65       if ( menu->status & _POSTED )
  66         RETURN(E_POSTED);
  67
  68       if ( (opts&O_ROWMAJOR) != (menu->opt&O_ROWMAJOR))
  69         {
  70           /* we need this only if the layout really changed ... */
  71           if (menu->items && menu->items[0])
  72             {
  73               menu->toprow  = 0;
  74               menu->curitem = menu->items[0];
  75               assert(menu->curitem);
  76               set_menu_format( menu, menu->frows, menu->fcols );
  77             }
  78         }
  79
  80       menu->opt = opts;
  81
  82       if (opts & O_ONEVALUE)
  83         {
  84           ITEM **item;
  85
  86           if ( ((item=menu->items) != (ITEM**)0) )
  87             for(;*item;item++)
  88               (*item)->value = FALSE;
  89         }
  90
  91       if (opts & O_SHOWDESC)    /* this also changes the geometry */
  92         _nc_Calculate_Item_Length_and_Width( menu );
  93     }
  94   else
  95     _nc_Default_Menu.opt = opts;
  96
  97   RETURN(E_OK);
  98 }
  99
 100 /*---------------------------------------------------------------------------
 101 |   Facility      :  libnmenu
 102 |   Function      :  int menu_opts_off(MENU *menu, Menu_Options opts)
 103 |
 104 |   Description   :  Switch off the options for this menu. If the new settings
 105 |                    end up in a change of the geometry of the menu, it
 106 |                    will be recalculated. This operation is forbidden if
 107 |                    the menu is already posted.
 108 |
 109 |   Return Values :  E_OK           - success
 110 |                    E_BAD_ARGUMENT - invalid options
 111 |                    E_POSTED       - menu is already posted
 112 +--------------------------------------------------------------------------*/
 113 NCURSES_EXPORT(int)
 114 menu_opts_off (MENU *menu, Menu_Options  opts)
 115 {
 116   MENU *cmenu = menu; /* use a copy because set_menu_opts must detect
 117                          NULL menu itself to adjust its behavior */
 118
 119   opts &= ALL_MENU_OPTS;
 120   if (opts & ~ALL_MENU_OPTS)
 121     RETURN(E_BAD_ARGUMENT);
 122   else
 123     {
 124       Normalize_Menu(cmenu);
 125       opts = cmenu->opt & ~opts;
 126       return set_menu_opts( menu, opts );
 127     }
 128 }
 129
 130 /*---------------------------------------------------------------------------
 131 |   Facility      :  libnmenu
 132 |   Function      :  int menu_opts_on(MENU *menu, Menu_Options opts)
 133 |
 134 |   Description   :  Switch on the options for this menu. If the new settings
 135 |                    end up in a change of the geometry of the menu, it
 136 |                    will be recalculated. This operation is forbidden if
 137 |                    the menu is already posted.
 138 |
 139 |   Return Values :  E_OK           - success
 140 |                    E_BAD_ARGUMENT - invalid menu options
 141 |                    E_POSTED       - menu is already posted
 142 +--------------------------------------------------------------------------*/
 143 NCURSES_EXPORT(int)
 144 menu_opts_on (MENU * menu, Menu_Options opts)
 145 {
 146   MENU *cmenu = menu; /* use a copy because set_menu_opts must detect
 147                          NULL menu itself to adjust its behavior */
 148
 149   opts &= ALL_MENU_OPTS;
 150   if (opts & ~ALL_MENU_OPTS)
 151     RETURN(E_BAD_ARGUMENT);
 152   else
 153     {
 154       Normalize_Menu(cmenu);
 155       opts = cmenu->opt | opts;
 156       return set_menu_opts(menu, opts);
 157     }
 158 }
 159
 160 /*---------------------------------------------------------------------------
 161 |   Facility      :  libnmenu
 162 |   Function      :  Menu_Options menu_opts(const MENU *menu)
 163 |
 164 |   Description   :  Return the options for this menu.
 165 |
 166 |   Return Values :  Menu options
 167 +--------------------------------------------------------------------------*/
 168 NCURSES_EXPORT(Menu_Options)
 169 menu_opts (const MENU *menu)
 170 {
 171   return (ALL_MENU_OPTS & Normalize_Menu( menu )->opt);
 172 }
 173
 174 /* m_opts.c ends here */