m_item_vis.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 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
40MODULE_ID("$Id: m_item_vis.c,v 1.10 1999/05/16 17:26:34 juergen 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+--------------------------------------------------------------------------*/
52bool item_visible(const ITEM * item)
53{
54  MENU *menu;
55
56  if ( item                                               &&
57      (menu=item->imenu)                                  &&
58      (menu->status & _POSTED)                            &&
59      ( (menu->toprow + menu->arows) > (item->y) )        &&
60      ( item->y >= menu->toprow) )
61    return TRUE;
62  else
63    return FALSE;
64}
65
66/* m_item_vis.c ends here */
67