m_item_vis.c revision 1.1 
1
2/***************************************************************************
3*                            COPYRIGHT NOTICE                              *
4****************************************************************************
5*                ncurses is copyright (C) 1992-1995                        *
6*                          Zeyd M. Ben-Halim                               *
7*                          zmbenhal@netcom.com                             *
8*                          Eric S. Raymond                                 *
9*                          esr@snark.thyrsus.com                           *
10*                                                                          *
11*        Permission is hereby granted to reproduce and distribute ncurses  *
12*        by any means and for any fee, whether alone or as part of a       *
13*        larger distribution, in source or in binary form, PROVIDED        *
14*        this notice is included with any such distribution, and is not    *
15*        removed from any of its header files. Mention of ncurses in any   *
16*        applications linked with it is highly appreciated.                *
17*                                                                          *
18*        ncurses comes AS IS with no warranty, implied or expressed.       *
19*                                                                          *
20***************************************************************************/
21
22/***************************************************************************
23* Module menu_item_vis                                                     *
24* Tell if menu item is visible                                             *
25***************************************************************************/
26
27#include "menu.priv.h"
28
29/*---------------------------------------------------------------------------
30|   Facility      :  libnmenu
31|   Function      :  bool item_visible(const ITEM *item)
32|
33|   Description   :  A item is visible if it currently appears in the
34|                    subwindow of a posted menu.
35|
36|   Return Values :  TRUE  if visible
37|                    FALSE if invisible
38+--------------------------------------------------------------------------*/
39bool item_visible(const ITEM * item)
40{
41  MENU *menu;
42
43  if ( item                                               &&
44      (menu=item->imenu)                                  &&
45      (menu->status & _POSTED)                            &&
46      ( (menu->toprow + menu->height - 1) >= (item->y) )  &&
47      ( item->y >= menu->toprow) )
48    return TRUE;
49  else
50    return FALSE;
51}
52
53/* m_item_vis.c ends here */
54