File: create_test_timeout.adb

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-----------------------------------------------------------------------
--          GtkAda - Ada95 binding for the Gimp Toolkit              --
--                                                                   --
--                     Copyright (C) 1998-1999                       --
--        Emmanuel Briot, Joel Brobecker and Arnaud Charlet          --
--                Copyright 2000-2006 AdaCore                        --
--                                                                   --
-- This library is free software; you can redistribute it and/or     --
-- modify it under the terms of the GNU General Public               --
-- License as published by the Free Software Foundation; either      --
-- version 2 of the License, or (at your option) any later version.  --
--                                                                   --
-- This library is distributed in the hope that it will be useful,   --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of    --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU --
-- General Public License for more details.                          --
--                                                                   --
-- You should have received a copy of the GNU General Public         --
-- License along with this library; if not, write to the             --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330,      --
-- Boston, MA 02111-1307, USA.                                       --
--                                                                   --
-- As a special exception, if other files instantiate generics from  --
-- this unit, or you link this unit with other files to produce an   --
-- executable, this  unit  does not  by itself cause  the resulting  --
-- executable to be covered by the GNU General Public License. This  --
-- exception does not however invalidate any other reasons why the   --
-- executable file  might be covered by the  GNU Public License.     --
-----------------------------------------------------------------------

with Glib;       use Glib;
with Gtk.Box;    use Gtk.Box;
with Gtk.Button; use Gtk.Button;
with Gtk.Label;  use Gtk.Label;
with Glib.Main;  use Glib.Main;
with Gtk.Widget; use Gtk.Widget;
with Gtk;        use Gtk;
with Common;     use Common;

package body Create_Test_Timeout is

   package Label_Timeout is new Glib.Main.Generic_Sources (Gtk_Label);

   Timeout : G_Source_Id;
   Count   : Integer := 0;

   ----------
   -- Help --
   ----------

   function Help return String is
   begin
      return "A @btimeout@B function is a function that is run at specific"
        & " time intervals. This is different from a @bidle@B function, since"
        & " you know exactly when the next occurence will be.";
   end Help;

   ------------------
   -- Timeout_Test --
   ------------------

   function Timeout_Test (Label : in Gtk_Label) return Boolean is
   begin
      Count := Count + 1;
      Set_Text (Label, "count:" & Integer'Image (Count));
      return True;
   end Timeout_Test;

   ------------------
   -- Stop_Timeout --
   ------------------

   procedure Stop_Timeout (Object : access Gtk_Widget_Record'Class) is
      pragma Warnings (Off, Object);
   begin
      if Timeout /= 0 then
         Remove (Timeout);
         Timeout := 0;
         Count := 0;
      end if;
   end Stop_Timeout;

   -------------------
   -- Start_Timeout --
   -------------------

   procedure Start_Timeout (Label : access Gtk_Label_Record'Class) is
   begin
      if Timeout = 0 then
         Timeout := Label_Timeout.Timeout_Add
           (100, Timeout_Test'Access, Gtk_Label (Label));
      end if;
   end Start_Timeout;

   ---------
   -- Run --
   ---------

   procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
      Button   : Gtk_Button;
      Label    : Gtk_Label;
      Box      : Gtk_Box;

   begin
      Set_Label (Frame, "Timeout Test");
      Gtk_New_Vbox (Box, Homogeneous => False, Spacing => 0);
      Add (Frame, Box);

      Gtk_New (Label, "count : 0");
      Set_Padding (Label, 10, 10);
      Pack_Start (Box, Label, False, False, 0);

      Gtk_New (Button, "start");
      Label_Handler.Object_Connect
        (Button, "clicked",
         Label_Handler.To_Marshaller (Start_Timeout'Access),
         Slot_Object => Label);
      Set_Flags (Button, Can_Default);
      Pack_Start (Box, Button, False, False, 0);

      Gtk_New (Button, "stop");
      Widget_Handler.Object_Connect
        (Button, "clicked",
         Widget_Handler.To_Marshaller (Stop_Timeout'Access),
         Slot_Object => Frame);
      Set_Flags (Button, Can_Default);
      Pack_Start (Box, Button, False, False, 0);

      Widget_Handler.Connect
        (Box, "destroy",
         Widget_Handler.To_Marshaller (Stop_Timeout'Access));

      Show_All (Frame);
   end Run;

end Create_Test_Timeout;