m_global.c

ncurses-5.4

  int l;
  
  assert(menu);

  menu->height  = 1 + menu->spc_rows * (menu->arows - 1);

  l = menu->namelen + menu->marklen;
  if ( (menu->opt & O_SHOWDESC) && (menu->desclen > 0) )
    l += (menu->desclen + menu->spc_desc);
  
  menu->itemlen = l;
  l *= menu->cols;
  l += (menu->cols-1)*menu->spc_cols; /* for the padding between the columns */
  menu->width = l;
}  

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  void _nc_Link_Item(MENU *menu)
|   
|   Description   :  Statically calculate for every item its four neighbors.
|                    This depends on the orientation of the menu. This
|                    static approach simplifies navigation in the menu a lot.
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(void)
_nc_Link_Items (MENU * menu)
{
  if (menu && menu->items && *(menu->items))
    {
      int i,j;
      ITEM *item;
      int Number_Of_Items = menu->nitems;
      int col = 0, row = 0;
      int Last_in_Row;
      int Last_in_Column;
      bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
      
      menu->status &= ~_LINK_NEEDED;
      
      if (menu->opt & O_ROWMAJOR)
	{
	  int Number_Of_Columns = menu->cols;
	  
	  for(i=0; i < Number_Of_Items; i++)
	    {
	      item = menu->items[i];
	      
	      Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns-1);
	      
	      item->left  = (col) ? 
		/* if we are not in the leftmost column, we can use the
		   predecessor in the items array */
		menu->items[i-1] :
		  (cycle ? menu->items[(Last_in_Row>=Number_Of_Items) ? 
				       Number_Of_Items-1:
				       Last_in_Row] : 
		   (ITEM *)0 );
	      
	      item->right = (  (col < (Number_Of_Columns-1)) && 
			     ((i+1) < Number_Of_Items) 
			     ) ? 
			       menu->items[i+1] :
				 ( cycle ? menu->items[row * Number_Of_Columns] : 
				  (ITEM *)0
				  );
	      
	      Last_in_Column = (menu->rows-1) * Number_Of_Columns + col;
	      
	      item->up    = (row) ? menu->items[i-Number_Of_Columns] :
		(cycle ? menu->items[(Last_in_Column>=Number_Of_Items) ?
				     Number_Of_Items-1 : 
				     Last_in_Column] : 
		 (ITEM *)0);
	      
	      item->down  = ( (i+Number_Of_Columns) < Number_Of_Items ) 
		? 
		  menu->items[i + Number_Of_Columns] :
		    (cycle ? menu->items[(row+1)<menu->rows ?
					 Number_Of_Items-1:col] : 
		     (ITEM *)0);
	      item->x = col;
	      item->y = row;
	      if ( ++col == Number_Of_Columns )
		{
		  row++;
		  col = 0;
		}
	    }
	}
      else
	{
	  int Number_Of_Rows = menu->rows;
	  
	  for(j=0; j<Number_Of_Items; j++)
	    {
	      item = menu->items[i=(col * Number_Of_Rows + row)];
	      
	      Last_in_Column = (menu->cols-1) * Number_Of_Rows + row;
	      
	      item->left  = (col) ? 
		menu->items[i - Number_Of_Rows] :
		  (cycle ? (Last_in_Column >= Number_Of_Items ) ? 
		   menu->items[Last_in_Column-Number_Of_Rows] : 
		   menu->items[Last_in_Column] : 
		   (ITEM *)0 );
	      
	      item->right = ((i + Number_Of_Rows) <Number_Of_Items) 
		? 
		  menu->items[i + Number_Of_Rows] :
		    (cycle ? menu->items[row] : (ITEM *)0);
	      
	      Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
	      
	      item->up    = (row) ? 
		menu->items[i-1] :
		  (cycle ?
		   menu->items[(Last_in_Row>=Number_Of_Items) ? 
			       Number_Of_Items-1:
			       Last_in_Row] :
		   (ITEM *)0);
	      
	      item->down  = (row < (Number_Of_Rows-1)) 
		? 
		  (menu->items[((i+1)<Number_Of_Items) ? 
			       i+1 :
			       (col-1)*Number_Of_Rows + row + 1]) :
				 (cycle ?
				  menu->items[col * Number_Of_Rows] :
				  (ITEM *)0
				  );
	      
	      item->x = col;
	      item->y = row;
	      if ( (++row) == Number_Of_Rows )
		{
		  col++;
		  row = 0;
		}
	    }
	}
    }
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  void _nc_Show_Menu(const MENU *menu)
|   
|   Description   :  Update the window that is associated with the menu
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(void)
_nc_Show_Menu (const MENU *menu)
{
  WINDOW *win;
  int maxy, maxx;
  
  assert(menu);
  if ( (menu->status & _POSTED) && !(menu->status & _IN_DRIVER) )
    {
      /* adjust the internal subwindow to start on the current top */
      assert(menu->sub);
      mvderwin(menu->sub,menu->spc_rows * menu->toprow,0);
      win = Get_Menu_Window(menu);
      
      maxy = getmaxy(win);
      maxx = getmaxx(win);	 
      
      if (menu->height < maxy) 
	maxy = menu->height;
      if (menu->width < maxx) 
	maxx = menu->width;
      
      copywin(menu->sub,win,0,0,0,0,maxy-1,maxx-1,0);
      pos_menu_cursor(menu);
    }	
}	

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu  
|   Function      :  void _nc_New_TopRow_and_CurrentItem(
|                            MENU *menu, 
|                            int new_toprow, 
|                            ITEM *new_current_item)
|   
|   Description   :  Redisplay the menu so that the given row becomes the
|                    top row and the given item becomes the new current
|                    item.
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(void)
_nc_New_TopRow_and_CurrentItem
(MENU *menu, int new_toprow, ITEM *new_current_item)
{
  ITEM *cur_item;
  bool mterm_called = FALSE;
  bool iterm_called = FALSE;
  
  assert(menu);
  if (menu->status & _POSTED)
    {
      if (new_current_item != menu->curitem)
	{
	  Call_Hook(menu,itemterm);
	  iterm_called = TRUE;
	}
      if (new_toprow != menu->toprow)
	{
	  Call_Hook(menu,menuterm);
	  mterm_called = TRUE;
	}			
      
      cur_item  = menu->curitem;
      assert(cur_item);
      menu->toprow  = new_toprow;
      menu->curitem = new_current_item;			
      
      if (mterm_called)
	{
	  Call_Hook(menu,menuinit);
	}
      if (iterm_called)
	{
	  /* this means, move from the old current_item to the new one... */
	  Move_To_Current_Item( menu, cur_item );
	  Call_Hook(menu,iteminit);
	}
      if (mterm_called || iterm_called)
	{
	  _nc_Show_Menu(menu);
	}
      else
	pos_menu_cursor(menu);
    }
  else
    { /* if we are not posted, this is quite simple */
      menu->toprow  = new_toprow;
      menu->curitem = new_current_item;
    }
}

/* m_global.c ends here */