contrib/ncurses-5.4/menu/m_cursor.c

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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_cursor                                                          *
  35 * Correctly position a menus cursor                                        *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_cursor.c,v 1.16 2003/10/25 15:23:42 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  _nc_menu_cursor_pos
  45 |
  46 |   Description   :  Return position of logical cursor to current item
  47 |
  48 |   Return Values :  E_OK            - success
  49 |                    E_BAD_ARGUMENT  - invalid menu
  50 |                    E_NOT_POSTED    - Menu is not posted
  51 +--------------------------------------------------------------------------*/
  52 NCURSES_EXPORT(int)
  53 _nc_menu_cursor_pos
  54 (const MENU* menu, const ITEM* item, int* pY, int* pX)
  55 {
  56   if (!menu || !pX || !pY)
  57     return(E_BAD_ARGUMENT);
  58   else
  59     {
  60       if ((ITEM*)0 == item)
  61         item = menu->curitem;
  62       assert(item!=(ITEM*)0);
  63
  64       if ( !( menu->status & _POSTED ) )
  65         return(E_NOT_POSTED);
  66
  67       *pX = item->x * (menu->spc_cols + menu->itemlen);
  68       *pY = (item->y - menu->toprow) * menu->spc_rows;
  69     }
  70   return(E_OK);
  71 }
  72
  73 /*---------------------------------------------------------------------------
  74 |   Facility      :  libnmenu
  75 |   Function      :  pos_menu_cursor
  76 |
  77 |   Description   :  Position logical cursor to current item in menu
  78 |
  79 |   Return Values :  E_OK            - success
  80 |                    E_BAD_ARGUMENT  - invalid menu
  81 |                    E_NOT_POSTED    - Menu is not posted
  82 +--------------------------------------------------------------------------*/
  83 NCURSES_EXPORT(int)
  84 pos_menu_cursor (const MENU * menu)
  85 {
  86   WINDOW *win, *sub;
  87   int x, y;
  88   int err = _nc_menu_cursor_pos(menu,(ITEM*)0,&y,&x);
  89
  90   if (E_OK==err)
  91     {
  92       win = menu->userwin ? menu->userwin : stdscr;
  93       sub = menu->usersub ? menu->usersub : win;
  94       assert(win && sub);
  95
  96       if ((menu->opt & O_SHOWMATCH) && (menu->pindex > 0))
  97         x += ( menu->pindex + menu->marklen - 1);
  98
  99       wmove(sub,y,x);
 100
 101       if ( win != sub )
 102         {
 103           wcursyncup(sub);
 104           wsyncup(sub);
 105           untouchwin(sub);
 106         }
 107     }
 108   RETURN(err);
 109 }
 110
 111 /* m_cursor.c ends here */