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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_post *
* Write or erase menus from associated subwindows *
***************************************************************************/
#include "menu.priv.h"
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Post_Item(MENU *menu, ITEM *item)
|
| Description : Draw the item in the menus window at the current
| window position
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Post_Item(const MENU * menu, const ITEM * item)
{
int i;
chtype ch;
bool isfore = FALSE, isback=FALSE, isgrey = FALSE;
assert(menu->win);
/* First we have to calculate the attribute depending on selectability
and selection status
*/
if (!(item->opt & O_SELECTABLE))
{
wattron(menu->win,menu->grey);
isgrey = TRUE;
}
else
{
if (item->value || item==menu->curitem)
{
wattron(menu->win,menu->fore);
isfore = TRUE;
}
else
{
wattron(menu->win,menu->back);
isback = TRUE;
}
}
/* We need a marker iff
- it is a onevalued menu and it is the current item
- or it has a selection value
*/
if (item->value || ((menu->opt&O_ONEVALUE) && (item==menu->curitem)) )
{
if (menu->marklen)
waddstr(menu->win,menu->mark);
}
else /* otherwise we have to wipe out the marker area */
for(ch=menu->pad,i=menu->marklen;i>0;i--)
waddch(menu->win,ch);
waddnstr(menu->win,item->name.str,item->name.length);
for(ch=menu->pad,i=menu->namelen-item->name.length;i>0;i--)
{
waddch(menu->win,ch);
}
/* Show description if required and available */
if ( (menu->opt & O_SHOWDESC) && menu->desclen>0 )
{
waddch(menu->win,menu->pad);
if (item->description.length)
waddnstr(menu->win,item->description.str,item->description.length);
for(ch=menu->pad,i=menu->desclen-item->description.length; i>0; i--)
{
waddch(menu->win,ch);
}
}
/* Remove attributes */
if (isfore)
wattroff(menu->win,menu->fore);
if (isback)
wattroff(menu->win,menu->back);
if (isgrey)
wattroff(menu->win,menu->grey);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : void _nc_Draw_Menu(const MENU *)
|
| Description : Display the menu in its windows
|
| Return Values : -
+--------------------------------------------------------------------------*/
void _nc_Draw_Menu(const MENU * menu)
{
ITEM *item = menu->items[0];
ITEM *lasthor, *lastvert;
ITEM *hitem;
int y = 0;
assert(item && menu->win);
lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : item;
do
{
wmove(menu->win,y++,0);
hitem = item;
lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : hitem;
do
{
_nc_Post_Item( menu, hitem);
if ( ((hitem = hitem->right) != lasthor) && hitem )
{
waddch( menu->win,menu->pad);
}
} while (hitem && (hitem != lasthor));
item = item->down;
} while( item && (item != lastvert) );
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int post_menu(MENU *)
|
| Description : Post a menu to the screen. This makes it visible.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - not a valid menu pointer
| E_SYSTEM_ERROR - error in lower layers
| E_NO_ROOM - Menu to large for screen
| E_NOT_CONNECTED - No items connected to menu
| E_BAD_STATE - Menu in userexit routine
| E_POSTED - Menu already posted
+--------------------------------------------------------------------------*/
int post_menu(MENU * menu)
{
if (!menu)
RETURN(E_BAD_ARGUMENT);
if ( menu->status & _IN_DRIVER )
RETURN(E_BAD_STATE);
if ( menu->status & _POSTED )
RETURN(E_POSTED);
if (menu->items && *(menu->items))
{
int y;
WINDOW *win = Get_Menu_Window(menu);
int maxy = getmaxy(win);
int maxx = getmaxx(win);
if (maxx < menu->width || maxy < menu->height)
RETURN(E_NO_ROOM);
if ( (menu->win = newpad(menu->rows,menu->width)) )
{
y = (maxy >= menu->rows) ? menu->rows : maxy;
if (y>=menu->height)
y = menu->height;
if(!(menu->sub = subpad(menu->win,y,menu->width,0,0)))
RETURN(E_SYSTEM_ERROR);
}
else
RETURN(E_SYSTEM_ERROR);
if (menu->status & _LINK_NEEDED)
_nc_Link_Items(menu);
}
else
RETURN(E_NOT_CONNECTED);
menu->status |= _POSTED;
if (!(menu->opt&O_ONEVALUE))
{
ITEM **items;
for(items=menu->items;*items;items++)
{
(*items)->value = FALSE;
}
}
_nc_Draw_Menu(menu);
Call_Hook(menu,menuinit);
Call_Hook(menu,iteminit);
_nc_Show_Menu(menu);
RETURN(E_OK);
}
/*---------------------------------------------------------------------------
| Facility : libnmenu
| Function : int unpost_menu(MENU *)
|
| Description : Detach menu from screen
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - not a valid menu pointer
| E_BAD_STATE - menu in userexit routine
| E_NOT_POSTED - menu is not posted
+--------------------------------------------------------------------------*/
int unpost_menu(MENU * menu)
{
WINDOW *win;
if (!menu)
RETURN(E_BAD_ARGUMENT);
if ( menu->status & _IN_DRIVER )
RETURN(E_BAD_STATE);
if ( !( menu->status & _POSTED ) )
RETURN(E_NOT_POSTED);
Call_Hook(menu,itemterm);
Call_Hook(menu,menuterm);
win = Get_Menu_Window(menu);
werase(win);
wsyncup(win);
assert(menu->sub);
delwin(menu->sub);
menu->sub = (WINDOW *)0;
assert(menu->win);
delwin(menu->win);
menu->win = (WINDOW *)0;
menu->status &= ~_POSTED;
RETURN(E_OK);
}
/* m_post.c ends here */
|
