File : terminal_interface-curses-panels.adb 
with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
with Interfaces.C;
package body Terminal_Interface.Curses.Panels is
   use type Interfaces.C.int;
   function Create (Win : Window) return Panel
   is
      function Newpanel (Win : Window) return Panel;
      pragma Import (C, Newpanel, "new_panel");
      Pan : Panel;
   begin
      Pan := Newpanel (Win);
      if Pan = Null_Panel then
         raise Panel_Exception;
      end if;
      return Pan;
   end Create;
   procedure Bottom (Pan : Panel)
   is
      function Bottompanel (Pan : Panel) return C_Int;
      pragma Import (C, Bottompanel, "bottom_panel");
   begin
      if Bottompanel (Pan) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Bottom;
   procedure Top (Pan : Panel)
   is
      function Toppanel (Pan : Panel) return C_Int;
      pragma Import (C, Toppanel, "top_panel");
   begin
      if Toppanel (Pan) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Top;
   procedure Show (Pan : Panel)
   is
      function Showpanel (Pan : Panel) return C_Int;
      pragma Import (C, Showpanel, "show_panel");
   begin
      if Showpanel (Pan) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Show;
   procedure Hide (Pan : Panel)
   is
      function Hidepanel (Pan : Panel) return C_Int;
      pragma Import (C, Hidepanel, "hide_panel");
   begin
      if Hidepanel (Pan) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Hide;
   function Get_Window (Pan : Panel) return Window
   is
      function Panel_Win (Pan : Panel) return Window;
      pragma Import (C, Panel_Win, "panel_window");
      Win : constant Window := Panel_Win (Pan);
   begin
      if Win = Null_Window then
         raise Panel_Exception;
      end if;
      return Win;
   end Get_Window;
   procedure Replace (Pan : Panel;
                      Win : Window)
   is
      function Replace_Pan (Pan : Panel;
                            Win : Window) return C_Int;
      pragma Import (C, Replace_Pan, "replace_panel");
   begin
      if Replace_Pan (Pan, Win) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Replace;
   procedure Move (Pan    : Panel;
                   Line   : Line_Position;
                   Column : Column_Position)
   is
      function Move (Pan    : Panel;
                     Line   : C_Int;
                     Column : C_Int) return C_Int;
      pragma Import (C, Move, "move_panel");
   begin
      if Move (Pan, C_Int (Line), C_Int (Column)) = Curses_Err then
         raise Panel_Exception;
      end if;
   end Move;
   function Is_Hidden (Pan : Panel) return Boolean
   is
      function Panel_Hidden (Pan : Panel) return C_Int;
      pragma Import (C, Panel_Hidden, "panel_hidden");
   begin
      if Panel_Hidden (Pan) = Curses_False then
         return False;
      else
         return True;
      end if;
   end Is_Hidden;
   procedure Delete (Pan : in out Panel)
   is
      function Del_Panel (Pan : Panel) return C_Int;
      pragma Import (C, Del_Panel, "del_panel");
   begin
      if Del_Panel (Pan) = Curses_Err then
         raise Panel_Exception;
      end if;
      Pan := Null_Panel;
   end Delete;
end Terminal_Interface.Curses.Panels;