m_cursor.c

ncurses-5.4

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/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

/***************************************************************************
* Module m_cursor                                                          *
* Correctly position a menus cursor                                        *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_cursor.c,v 1.16 2003/10/25 15:23:42 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  _nc_menu_cursor_pos
|
|   Description   :  Return position of logical cursor to current item
|
|   Return Values :  E_OK            - success
|                    E_BAD_ARGUMENT  - invalid menu
|                    E_NOT_POSTED    - Menu is not posted
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
_nc_menu_cursor_pos
(const MENU* menu, const ITEM* item, int* pY, int* pX)
{
  if (!menu || !pX || !pY)
    return(E_BAD_ARGUMENT);
  else
    {
      if ((ITEM*)0 == item)
	item = menu->curitem;
      assert(item!=(ITEM*)0);

      if ( !( menu->status & _POSTED ) )
	return(E_NOT_POSTED);

      *pX = item->x * (menu->spc_cols + menu->itemlen);
      *pY = (item->y - menu->toprow) * menu->spc_rows;
    }
  return(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  pos_menu_cursor
|
|   Description   :  Position logical cursor to current item in menu
|
|   Return Values :  E_OK            - success
|                    E_BAD_ARGUMENT  - invalid menu
|                    E_NOT_POSTED    - Menu is not posted
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
pos_menu_cursor (const MENU * menu)
{
  WINDOW *win, *sub;
  int x, y;
  int err = _nc_menu_cursor_pos(menu,(ITEM*)0,&y,&x);

  if (E_OK==err)
    {
      win = menu->userwin ? menu->userwin : stdscr;
      sub = menu->usersub ? menu->usersub : win;
      assert(win && sub);

      if ((menu->opt & O_SHOWMATCH) && (menu->pindex > 0))
	x += ( menu->pindex + menu->marklen - 1);

      wmove(sub,y,x);

      if ( win != sub )
	{
	  wcursyncup(sub);
	  wsyncup(sub);
	  untouchwin(sub);
	}
    }
  RETURN(err);
}

/* m_cursor.c ends here */