m_item_vis.c revision 1.2 
1/*-----------------------------------------------------------------------------+
2|           The ncurses menu library is  Copyright (C) 1995-1997               |
3|             by Juergen Pfeifer <Juergen.Pfeifer@T-Online.de>                 |
4|                          All Rights Reserved.                                |
5|                                                                              |
6| Permission to use, copy, modify, and distribute this software and its        |
7| documentation for any purpose and without fee is hereby granted, provided    |
8| that the above copyright notice appear in all copies and that both that      |
9| copyright notice and this permission notice appear in supporting             |
10| documentation, and that the name of the above listed copyright holder(s) not |
11| be used in advertising or publicity pertaining to distribution of the        |
12| software without specific, written prior permission.                         |
13|                                                                              |
14| THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD TO  |
15| THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-  |
16| NESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR   |
17| ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RE- |
18| SULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
19| NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH    |
20| THE USE OR PERFORMANCE OF THIS SOFTWARE.                                     |
21+-----------------------------------------------------------------------------*/
22
23/***************************************************************************
24* Module menu_item_vis                                                     *
25* Tell if menu item is visible                                             *
26***************************************************************************/
27
28#include "menu.priv.h"
29
30MODULE_ID("Id: m_item_vis.c,v 1.6 1997/05/01 16:47:26 juergen Exp $")
31
32/*---------------------------------------------------------------------------
33|   Facility      :  libnmenu
34|   Function      :  bool item_visible(const ITEM *item)
35|
36|   Description   :  A item is visible if it currently appears in the
37|                    subwindow of a posted menu.
38|
39|   Return Values :  TRUE  if visible
40|                    FALSE if invisible
41+--------------------------------------------------------------------------*/
42bool item_visible(const ITEM * item)
43{
44  MENU *menu;
45
46  if ( item                                               &&
47      (menu=item->imenu)                                  &&
48      (menu->status & _POSTED)                            &&
49      ( (menu->toprow + menu->arows) > (item->y) )        &&
50      ( item->y >= menu->toprow) )
51    return TRUE;
52  else
53    return FALSE;
54}
55
56/* m_item_vis.c ends here */
57