# File : terminal_interface-curses-panels.adb

    ------------------------------------------------------------------------------
    --                                                                          --
    --                           GNAT ncurses Binding                           --
    --                                                                          --
    --                      Terminal_Interface.Curses.Panels                    --
    --                                                                          --
    --                                 B O D Y                                  --
    --                                                                          --
    ------------------------------------------------------------------------------
    -- Copyright 2020 Thomas E. Dickey                                          --
    -- Copyright 1999-2004,2009 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, 1996
    --  Version Control:
    --  @Revision: 1.15 @
    --  @Date: 2020/02/02 23:34:34 @
    --  Binding Version 01.00
    ------------------------------------------------------------------------------
    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;