1 /**************************************************************************** 2 * Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 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 40 MODULE_ID("$Id: m_item_top.c,v 1.4 1999/05/16 17:26:01 juergen Exp $") 41 42 /*--------------------------------------------------------------------------- 43 | Facility : libnmenu 44 | Function : int set_top_row(MENU *menu, int row) 45 | 46 | Description : Makes the speified 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 +--------------------------------------------------------------------------*/ 52 int set_top_row(MENU * menu, int row) 53 { 54 ITEM *item; 55 56 if (menu) 57 { 58 if ( menu->status & _IN_DRIVER ) 59 RETURN(E_BAD_STATE); 60 if (menu->items == (ITEM **)0) 61 RETURN(E_NOT_CONNECTED); 62 63 if ((row<0) || (row > (menu->rows - menu->arows))) 64 RETURN(E_BAD_ARGUMENT); 65 } 66 else 67 RETURN(E_BAD_ARGUMENT); 68 69 if (row != menu->toprow) 70 { 71 if (menu->status & _LINK_NEEDED) 72 _nc_Link_Items(menu); 73 74 item = menu->items[ (menu->opt&O_ROWMAJOR) ? (row*menu->cols) : row ]; 75 assert(menu->pattern); 76 Reset_Pattern(menu); 77 _nc_New_TopRow_and_CurrentItem(menu, row, item); 78 } 79 80 RETURN(E_OK); 81 } 82 83 /*--------------------------------------------------------------------------- 84 | Facility : libnmenu 85 | Function : int top_row(const MENU *) 86 | 87 | Description : Return the top row of the menu 88 | 89 | Return Values : The row number or ERR if there is no row 90 +--------------------------------------------------------------------------*/ 91 int top_row(const MENU * menu) 92 { 93 if (menu && menu->items && *(menu->items)) 94 { 95 assert( (menu->toprow>=0) && (menu->toprow < menu->rows) ); 96 return menu->toprow; 97 } 98 else 99 return(ERR); 100 } 101 102 /* m_item_top.c ends here */ 103