Base version of ncurses-5.7 library
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+------------------------------------------------------------------------------
+--                                                                          --
+--                       GNAT ncurses Binding Samples                       --
+--                                                                          --
+--                            Sample.Curses_Demo                            --
+--                                                                          --
+--                                 B O D Y                                  --
+--                                                                          --
+------------------------------------------------------------------------------
+-- Copyright (c) 1998,2004 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: 2004/08/21 21:37:00 $
+--  Binding Version 01.00
+------------------------------------------------------------------------------
+with Terminal_Interface.Curses; use Terminal_Interface.Curses;
+with Terminal_Interface.Curses.Menus; use Terminal_Interface.Curses.Menus;
+with Terminal_Interface.Curses.Mouse;  use Terminal_Interface.Curses.Mouse;
+with Terminal_Interface.Curses.Panels;  use Terminal_Interface.Curses.Panels;
+with Terminal_Interface.Curses.Panels.User_Data;
+
+with Sample.Manifest; use Sample.Manifest;
+with Sample.Helpers; use Sample.Helpers;
+with Sample.Function_Key_Setting; use Sample.Function_Key_Setting;
+
+with Sample.Explanation; use Sample.Explanation;
+
+with Sample.Menu_Demo.Handler;
+with Sample.Curses_Demo.Mouse;
+with Sample.Curses_Demo.Attributes;
+
+package body Sample.Curses_Demo is
+
+   type User_Data is new Integer;
+   type User_Data_Access is access all User_Data;
+   package PUD is new Panels.User_Data (User_Data, User_Data_Access);
+   --  We use above instantiation of the generic User_Data package to
+   --  demonstrate and test the use of the user data maechanism.
+
+   procedure Demo
+   is
+      function My_Driver (M : Menu;
+                          K : Key_Code;
+                          Pan : Panel) return Boolean;
+      package Mh is new Sample.Menu_Demo.Handler (My_Driver);
+
+      Itm : Item_Array_Access := new Item_Array'
+        (New_Item ("Attributes Demo"),
+         New_Item ("Mouse Demo"),
+         Null_Item);
+      M  : Menu := New_Menu (Itm);
+      U1 : constant User_Data_Access := new User_Data'(4711);
+      U2 : User_Data_Access;
+
+      function My_Driver (M : Menu;
+                          K : Key_Code;
+                          Pan : Panel) return Boolean
+      is
+         Idx : constant Positive := Get_Index (Current (M));
+         Result : Boolean := False;
+      begin
+         PUD.Set_User_Data (Pan, U1); --  set some user data, just for fun
+         if K in User_Key_Code'Range then
+            if K = QUIT then
+               Result := True;
+            elsif K = SELECT_ITEM then
+               if Idx in Itm'Range then
+                  Hide (Pan);
+                  Update_Panels;
+               end if;
+               case Idx is
+                  when 1 => Sample.Curses_Demo.Attributes.Demo;
+                  when 2 => Sample.Curses_Demo.Mouse.Demo;
+                  when others => Not_Implemented;
+               end case;
+               if Idx in Itm'Range then
+                  Top (Pan);
+                  Show (Pan);
+                  Update_Panels;
+                  Update_Screen;
+               end if;
+            end if;
+         end if;
+         PUD.Get_User_Data (Pan, U2); --  get the user data
+         pragma Assert (U1.all = U2.all and then U1 = U2);
+         return Result;
+      end My_Driver;
+
+   begin
+
+      if (1 + Item_Count (M)) /= Itm'Length then
+         raise Constraint_Error;
+      end if;
+
+      if not Has_Mouse then
+         declare
+            O : Item_Option_Set;
+         begin
+            Get_Options (Itm (2), O);
+            O.Selectable := False;
+            Set_Options (Itm (2), O);
+         end;
+      end if;
+
+      Push_Environment ("CURSES00");
+      Notepad ("CURSES-PAD00");
+      Default_Labels;
+      Refresh_Soft_Label_Keys_Without_Update;
+
+      Mh.Drive_Me (M, " Demo ");
+      Pop_Environment;
+
+      Delete (M);
+      Free (Itm, True);
+   end Demo;
+
+end Sample.Curses_Demo;