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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
33 /***************************************************************************
35 * Set and get maximum numbers of rows and columns in menus *
36 ***************************************************************************/
38 #include "menu.priv.h"
40 MODULE_ID("$Id: m_format.c,v 1.18 2012/06/09 23:54:02 tom Exp $")
42 #define minimum(a,b) ((a)<(b) ? (a): (b))
44 /*---------------------------------------------------------------------------
46 | Function : int set_menu_format(MENU *menu, int rows, int cols)
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.
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 +--------------------------------------------------------------------------*/
59 set_menu_format(MENU * menu, int rows, int cols)
61 int total_rows, total_cols;
63 T((T_CALLED("set_menu_format(%p,%d,%d)"), (void *)menu, rows, cols));
65 if (rows < 0 || cols < 0)
66 RETURN(E_BAD_ARGUMENT);
70 if (menu->status & _POSTED)
74 RETURN(E_NOT_CONNECTED);
84 menu->frows = (short)rows;
85 menu->fcols = (short)cols;
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;
93 menu->rows = (short)total_rows;
94 menu->cols = (short)total_cols;
95 menu->arows = (short)minimum(total_rows, rows);
97 menu->curitem = *(menu->items);
98 assert(menu->curitem);
99 SetStatus(menu, _LINK_NEEDED);
100 _nc_Calculate_Item_Length_and_Width(menu);
105 _nc_Default_Menu.frows = (short)rows;
107 _nc_Default_Menu.fcols = (short)cols;
113 /*---------------------------------------------------------------------------
114 | Facility : libnmenu
115 | Function : void menu_format(const MENU *menu, int *rows, int *cols)
117 | Description : Returns the maximum number of rows and columns that may
118 | be displayed at one time on menu.
121 +--------------------------------------------------------------------------*/
123 menu_format(const MENU * menu, int *rows, int *cols)
126 *rows = Normalize_Menu(menu)->frows;
128 *cols = Normalize_Menu(menu)->fcols;
131 /* m_format.c ends here */