| Current Path : /usr/src/contrib/ncurses/menu/ |
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| Current File : //usr/src/contrib/ncurses/menu/m_item_top.c |
/****************************************************************************
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/****************************************************************************
* Author: Juergen Pfeifer, 1995,1997 *
****************************************************************************/
/***************************************************************************
* Module m_item_top *
* Set and get top menus item *
***************************************************************************/
#include "menu.priv.h"
MODULE_ID("$Id: m_item_top.c,v 1.10 2004/12/11 23:29:34 tom Exp $")
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int set_top_row(MENU *menu, int row)
|
| Description : Makes the specified row the top row in the menu
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - not a menu pointer or invalid row
| E_NOT_CONNECTED - there are no items for the menu
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_top_row(MENU * menu, int row)
{
ITEM *item;
T((T_CALLED("set_top_row(%p,%d)"), menu, row));
if (menu)
{
if (menu->status & _IN_DRIVER)
RETURN(E_BAD_STATE);
if (menu->items == (ITEM **) 0)
RETURN(E_NOT_CONNECTED);
if ((row < 0) || (row > (menu->rows - menu->arows)))
RETURN(E_BAD_ARGUMENT);
}
else
RETURN(E_BAD_ARGUMENT);
if (row != menu->toprow)
{
if (menu->status & _LINK_NEEDED)
_nc_Link_Items(menu);
item = menu->items[(menu->opt & O_ROWMAJOR) ? (row * menu->cols) : row];
assert(menu->pattern);
Reset_Pattern(menu);
_nc_New_TopRow_and_CurrentItem(menu, row, item);
}
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int top_row(const MENU *)
|
| Description : Return the top row of the menu
|
| Return Values : The row number or ERR if there is no row
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
top_row(const MENU * menu)
{
T((T_CALLED("top_row(%p)"), menu));
if (menu && menu->items && *(menu->items))
{
assert((menu->toprow >= 0) && (menu->toprow < menu->rows));
returnCode(menu->toprow);
}
else
returnCode(ERR);
}
/* m_item_top.c ends here */