1/****************************************************************************
2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
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.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_item_top                                                        *
35* Set and get top menus item                                               *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_item_top.c,v 1.10 2004/12/11 23:29:34 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  int set_top_row(MENU *menu, int row)
45|
46|   Description   :  Makes the specified row the top row in the menu
47|
48|   Return Values :  E_OK             - success
49|                    E_BAD_ARGUMENT   - not a menu pointer or invalid row
50|                    E_NOT_CONNECTED  - there are no items for the menu
51+--------------------------------------------------------------------------*/
52NCURSES_EXPORT(int)
53set_top_row(MENU * menu, int row)
54{
55  ITEM *item;
56
57  T((T_CALLED("set_top_row(%p,%d)"), menu, row));
58
59  if (menu)
60    {
61      if (menu->status & _IN_DRIVER)
62	RETURN(E_BAD_STATE);
63      if (menu->items == (ITEM **) 0)
64	RETURN(E_NOT_CONNECTED);
65
66      if ((row < 0) || (row > (menu->rows - menu->arows)))
67	RETURN(E_BAD_ARGUMENT);
68    }
69  else
70    RETURN(E_BAD_ARGUMENT);
71
72  if (row != menu->toprow)
73    {
74      if (menu->status & _LINK_NEEDED)
75	_nc_Link_Items(menu);
76
77      item = menu->items[(menu->opt & O_ROWMAJOR) ? (row * menu->cols) : row];
78      assert(menu->pattern);
79      Reset_Pattern(menu);
80      _nc_New_TopRow_and_CurrentItem(menu, row, item);
81    }
82
83  RETURN(E_OK);
84}
85
86/*---------------------------------------------------------------------------
87|   Facility      :  libnmenu
88|   Function      :  int top_row(const MENU *)
89|
90|   Description   :  Return the top row of the menu
91|
92|   Return Values :  The row number or ERR if there is no row
93+--------------------------------------------------------------------------*/
94NCURSES_EXPORT(int)
95top_row(const MENU * menu)
96{
97  T((T_CALLED("top_row(%p)"), menu));
98  if (menu && menu->items && *(menu->items))
99    {
100      assert((menu->toprow >= 0) && (menu->toprow < menu->rows));
101      returnCode(menu->toprow);
102    }
103  else
104    returnCode(ERR);
105}
106
107/* m_item_top.c ends here */
108