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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_item_cur *
* Set and get current menus item *
***************************************************************************/
#include "menu.priv.h"
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int set_current_item(MENU *menu, const ITEM *item)
|
| Description : Make the item the current item
|
| Return Values : E_OK - success
+--------------------------------------------------------------------------*/
int set_current_item(MENU * menu, ITEM * item)
{
if (menu && item && (item->imenu==menu))
{
if ( menu->status & _IN_DRIVER )
RETURN(E_BAD_STATE);
assert( menu->curitem );
if (item != menu->curitem)
{
if (menu->status & _LINK_NEEDED)
{
/*
* Items are available, but they are not linked together.
* So we have to link here.
*/
_nc_Link_Items(menu);
}
assert(menu->pattern);
Reset_Pattern(menu);
/* adjust the window to make item visible and update the menu */
Adjust_Current_Item(menu,menu->toprow,item);
}
}
else
RETURN(E_BAD_ARGUMENT);
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : ITEM *current_item(const MENU *menu)
|
| Description : Return the menus current item
|
| Return Values : Item pointer or NULL if failure
+--------------------------------------------------------------------------*/
ITEM *current_item(const MENU * menu)
{
return (menu && menu->items) ? menu->curitem : (ITEM *)0;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int item_index(const ITEM *)
|
| Description : Return the logical index of this item.
|
| Return Values : The index or -1 if this is an invalid item pointer
+--------------------------------------------------------------------------*/
int item_index(const ITEM *item)
{
return (item && item->imenu) ? item->index : -1;
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int set_top_row(MENU *menu, int row)
|
| Description : Makes the speified 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
+--------------------------------------------------------------------------*/
int set_top_row(MENU * menu, int row)
{
ITEM *item;
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->height)))
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 -1 if there is no row
+--------------------------------------------------------------------------*/
int top_row(const MENU * menu)
{
if (menu && menu->items && *(menu->items))
{
assert( (menu->toprow>=0) && (menu->toprow < menu->rows) );
return menu->toprow;
}
else
return(-1);
}
/* m_item_cur.c ends here */
|
