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/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/***************************************************************************
* Module menu_format *
* Set and get maximum numbers of rows and columns in menus *
***************************************************************************/
#include "menu.priv.h"
#define minimum(a,b) ((a)<(b) ? (a): (b))
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int set_menu_format(MENU *menu, int rows, int cols)
|
| Description : Sets the maximum number of rows and columns of items
| that may be displayed at one time on a menu. If the
| menu contains more items than can be displayed at
| once, the menu will be scrollable.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - invalid values passed
| E_NOT_CONNECTED - there are no items connected
| E_POSTED - the menu is already posted
+--------------------------------------------------------------------------*/
int set_menu_format(MENU *menu, int rows, int cols)
{
int total_rows, total_cols;
if (rows<0 || cols<0)
RETURN(E_BAD_ARGUMENT);
if (menu)
{
if ( menu->status & _POSTED )
RETURN(E_POSTED);
if (!(menu->items))
RETURN(E_NOT_CONNECTED);
if (rows==0)
rows = menu->frows;
if (cols==0)
cols = menu->fcols;
if (menu->pattern)
Reset_Pattern(menu);
menu->frows = rows;
menu->fcols = cols;
assert(rows>0 && cols>0);
total_rows = (menu->nitems - 1)/cols + 1;
total_cols = (menu->status & O_ROWMAJOR) ?
minimum(menu->nitems,cols) :
(menu->nitems-1)/total_rows + 1;
menu->rows = total_rows;
menu->cols = total_cols;
menu->height = minimum(total_rows,rows);
menu->toprow = 0;
menu->curitem = *(menu->items);
assert(menu->curitem);
menu->status |= _LINK_NEEDED;
_nc_Calculate_Item_Length_and_Width(menu);
}
else
{
if (rows>0) _nc_Default_Menu.frows = rows;
if (cols>0) _nc_Default_Menu.fcols = cols;
}
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void menu_format(const MENU *menu, int *rows, int *cols)
|
| Description : Returns the maximum number of rows and columns that may
| be displayed at one time on menu.
|
| Return Values : -
+--------------------------------------------------------------------------*/
void menu_format(const MENU *menu, int *rows, int *cols)
{
if (rows)
*rows = Normalize_Menu(menu)->frows;
if (cols)
*cols = Normalize_Menu(menu)->fcols;
}
/* m_format.c ends here */
|
