contrib/ncurses-5.4/menu/m_item_vis.c

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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_item_vis                                                        *
  35 * Tell if menu item is visible                                             *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_item_vis.c,v 1.13 2003/10/25 14:54:48 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  bool item_visible(const ITEM *item)
  45 |
  46 |   Description   :  A item is visible if it currently appears in the
  47 |                    subwindow of a posted menu.
  48 |
  49 |   Return Values :  TRUE  if visible
  50 |                    FALSE if invisible
  51 +--------------------------------------------------------------------------*/
  52 NCURSES_EXPORT(bool)
  53 item_visible (const ITEM * item)
  54 {
  55   MENU *menu;
  56
  57   if ( item                                               &&
  58       (menu=item->imenu)                                  &&
  59       (menu->status & _POSTED)                            &&
  60       ( (menu->toprow + menu->arows) > (item->y) )        &&
  61       ( item->y >= menu->toprow) )
  62     return TRUE;
  63   else
  64     return FALSE;
  65 }
  66
  67 /* m_item_vis.c ends here */