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_format * 35 * Set and get maximum numbers of rows and columns in menus * 36 ***************************************************************************/ 37 38 #include "menu.priv.h" 39 40 MODULE_ID("$Id: m_format.c,v 1.15 2004/12/11 23:11:21 tom Exp $") 41 42 #define minimum(a,b) ((a)<(b) ? (a): (b)) 43 44 /*--------------------------------------------------------------------------- 45 | Facility : libnmenu 46 | Function : int set_menu_format(MENU *menu, int rows, int cols) 47 | 48 | Description : Sets the maximum number of rows and columns of items 49 | that may be displayed at one time on a menu. If the 50 | menu contains more items than can be displayed at 51 | once, the menu will be scrollable. 52 | 53 | Return Values : E_OK - success 54 | E_BAD_ARGUMENT - invalid values passed 55 | E_NOT_CONNECTED - there are no items connected 56 | E_POSTED - the menu is already posted 57 +--------------------------------------------------------------------------*/ 58 NCURSES_EXPORT(int) 59 set_menu_format(MENU * menu, int rows, int cols) 60 { 61 int total_rows, total_cols; 62 63 T((T_CALLED("set_menu_format(%p,%d,%d)"), menu, rows, cols)); 64 65 if (rows < 0 || cols < 0) 66 RETURN(E_BAD_ARGUMENT); 67 68 if (menu) 69 { 70 if (menu->status & _POSTED) 71 RETURN(E_POSTED); 72 73 if (!(menu->items)) 74 RETURN(E_NOT_CONNECTED); 75 76 if (rows == 0) 77 rows = menu->frows; 78 if (cols == 0) 79 cols = menu->fcols; 80 81 if (menu->pattern) 82 Reset_Pattern(menu); 83 84 menu->frows = rows; 85 menu->fcols = cols; 86 87 assert(rows > 0 && cols > 0); 88 total_rows = (menu->nitems - 1) / cols + 1; 89 total_cols = (menu->opt & O_ROWMAJOR) ? 90 minimum(menu->nitems, cols) : 91 (menu->nitems - 1) / total_rows + 1; 92 93 menu->rows = total_rows; 94 menu->cols = total_cols; 95 menu->arows = minimum(total_rows, rows); 96 menu->toprow = 0; 97 menu->curitem = *(menu->items); 98 assert(menu->curitem); 99 menu->status |= _LINK_NEEDED; 100 _nc_Calculate_Item_Length_and_Width(menu); 101 } 102 else 103 { 104 if (rows > 0) 105 _nc_Default_Menu.frows = rows; 106 if (cols > 0) 107 _nc_Default_Menu.fcols = cols; 108 } 109 110 RETURN(E_OK); 111 } 112 113 /*--------------------------------------------------------------------------- 114 | Facility : libnmenu 115 | Function : void menu_format(const MENU *menu, int *rows, int *cols) 116 | 117 | Description : Returns the maximum number of rows and columns that may 118 | be displayed at one time on menu. 119 | 120 | Return Values : - 121 +--------------------------------------------------------------------------*/ 122 NCURSES_EXPORT(void) 123 menu_format(const MENU * menu, int *rows, int *cols) 124 { 125 if (rows) 126 *rows = Normalize_Menu(menu)->frows; 127 if (cols) 128 *cols = Normalize_Menu(menu)->fcols; 129 } 130 131 /* m_format.c ends here */ 132