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freebsd-dev/contrib/ncurses/menu/m_post.c
Peter Wemm 0e3d540892 Import unmodified (but trimmed) ncurses 5.0 prerelease 990821. 
This contains the full eti (panel, form, menu) extensions.
bmake glue to follow.

Obtained from:	ftp://ftp.clark.net/pub/dickey/ncurses
1999-08-24 01:06:48 +00:00

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/****************************************************************************
* Copyright (c) 1998 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
****************************************************************************/
/***************************************************************************
* Module m_post *
* Write or erase menus from associated subwindows *
***************************************************************************/
#include "menu.priv.h"
MODULE_ID("$Id: m_post.c,v 1.16 1999/05/16 17:27:38 juergen Exp $")
/*---------------------------------------------------------------------------
| 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;
int item_x, item_y;
int count = 0;
bool isfore = FALSE, isback=FALSE, isgrey = FALSE;
assert(menu->win);
getyx(menu->win,item_y,item_x);
/* We need a marker iff
- it is a onevalued menu and it is the current item
- or it has a selection value
*/
wattron(menu->win,menu->back);
if (item->value || (item==menu->curitem))
{
if (menu->marklen)
{
/* In a multi selection menu we use the fore attribute
for a selected marker that is not the current one.
This improves visualization of the menu, because now
always the 'normal' marker denotes the current
item. */
if (!(menu->opt & O_ONEVALUE) && item->value && item!=menu->curitem)
{
wattron(menu->win,menu->fore);
isfore = TRUE;
}
waddstr(menu->win,menu->mark);
if (isfore)
{
wattron(menu->win,menu->fore);
isfore = FALSE;
}
}
}
else /* otherwise we have to wipe out the marker area */
for(ch=' ',i=menu->marklen;i>0;i--)
waddch(menu->win,ch);
wattroff(menu->win,menu->back);
count += menu->marklen;
/* 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;
}
}
waddnstr(menu->win,item->name.str,item->name.length);
for(ch=' ',i=menu->namelen-item->name.length;i>0;i--)
{
waddch(menu->win,ch);
}
count += menu->namelen;
/* Show description if required and available */
if ( (menu->opt & O_SHOWDESC) && menu->desclen>0 )
{
int m = menu->spc_desc/2;
int cy = -1, cx = -1;
for(ch=' ',i=0; i < menu->spc_desc; i++)
{
if (i==m)
{
waddch(menu->win,menu->pad);
getyx(menu->win,cy,cx);
}
else
waddch(menu->win,ch);
}
if (item->description.length)
waddnstr(menu->win,item->description.str,item->description.length);
for(ch=' ',i=menu->desclen-item->description.length; i>0; i--)
{
waddch(menu->win,ch);
}
count += menu->desclen + menu->spc_desc;
if (menu->spc_rows > 1)
{
int j, k, ncy, ncx;
assert(cx>=0 && cy>=0);
getyx(menu->win,ncy,ncx);
if (isgrey) wattroff(menu->win,menu->grey);
else if (isfore) wattroff(menu->win,menu->fore);
wattron(menu->win,menu->back);
for(j=1; j < menu->spc_rows;j++)
{
if ((item_y+j) < getmaxy(menu->win))
{
wmove (menu->win,item_y+j,item_x);
for(k=0;k<count;k++)
waddch(menu->win,' ');
}
if ((cy+j) < getmaxy(menu->win))
mvwaddch(menu->win,cy+j,cx-1,menu->pad);
}
wmove(menu->win,ncy,ncx);
if (!isback)
wattroff(menu->win,menu->back);
}
}
/* 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;
chtype s_bkgd;
assert(item && menu->win);
s_bkgd = getbkgd(menu->win);
wbkgdset(menu->win,menu->back);
werase(menu->win);
wbkgdset(menu->win,s_bkgd);
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);
wattron(menu->win,menu->back);
if ( ((hitem = hitem->right) != lasthor) && hitem )
{
int i,j, cy, cx;
chtype ch = ' ';
getyx(menu->win,cy,cx);
for(j=0;j<menu->spc_rows;j++)
{
wmove(menu->win,cy+j,cx);
for(i=0; i < menu->spc_cols; i++)
{
waddch( menu->win,ch);
}
}
wmove(menu->win,cy,cx+menu->spc_cols);
}
} while (hitem && (hitem != lasthor));
wattroff(menu->win,menu->back);
item = item->down;
y += menu->spc_rows;
} 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;
int h = 1 + menu->spc_rows * (menu->rows - 1);
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(h,menu->width)) )
{
y = (maxy >= h) ? h : 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 */
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