1 /* $OpenBSD: m_item_top.c,v 1.4 2001/01/22 18:02:04 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 * 33 ****************************************************************************/ 34 35 /*************************************************************************** 36 * Module m_item_top * 37 * Set and get top menus item * 38 ***************************************************************************/ 39 40 #include "menu.priv.h" 41 42 MODULE_ID("$From: m_item_top.c,v 1.5 2000/12/10 02:16:48 tom Exp $") 43 44 /*--------------------------------------------------------------------------- 45 | Facility : libnmenu 46 | Function : int set_top_row(MENU *menu, int row) 47 | 48 | Description : Makes the speified row the top row in the menu 49 | 50 | Return Values : E_OK - success 51 | E_BAD_ARGUMENT - not a menu pointer or invalid row 52 | E_NOT_CONNECTED - there are no items for the menu 53 +--------------------------------------------------------------------------*/ 54 NCURSES_EXPORT(int) 55 set_top_row (MENU * menu, int row) 56 { 57 ITEM *item; 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 +--------------------------------------------------------------------------*/ 94 NCURSES_EXPORT(int) 95 top_row (const MENU * menu) 96 { 97 if (menu && menu->items && *(menu->items)) 98 { 99 assert( (menu->toprow>=0) && (menu->toprow < menu->rows) ); 100 return menu->toprow; 101 } 102 else 103 return(ERR); 104 } 105 106 /* m_item_top.c ends here */ 107