File: create_progress.adb

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-----------------------------------------------------------------------
--          GtkAda - Ada95 binding for the Gimp Toolkit              --
--                                                                   --
--   Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet   --
--                Copyright (C) 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.Adjustment;      use Gtk.Adjustment;
with Gtk.Alignment;       use Gtk.Alignment;
with Gtk.Box;             use Gtk.Box;
with Gtk.Check_Button;    use Gtk.Check_Button;
with Gtk.Enums;           use Gtk.Enums;
with Gtk.GEntry;          use Gtk.GEntry;
with Gtk.Label;           use Gtk.Label;
with Glib.Main;           use Glib.Main;
with Gtk.Option_Menu;     use Gtk.Option_Menu;
with Gtk.Progress_Bar;    use Gtk.Progress_Bar;
with Gtk.Radio_Menu_Item; use Gtk.Radio_Menu_Item;
with Gtk.Spin_Button;     use Gtk.Spin_Button;
with Gtk.Table;           use Gtk.Table;
with Gtk.Widget;          use Gtk.Widget;
with Gtk;                 use Gtk;
with Gtkada.Types;        use Gtkada.Types;

with Common; use Common;

package body Create_Progress is

   package Time_Cb  is new Glib.Main.Generic_Sources (Gtk_Progress_Bar);

   Items1 : constant Chars_Ptr_Array :=
     "Left-Right" + "Right-Left" + "Bottom-Top" + "Top-Bottom";

   type ProgressData is record
      Pbar            : Gtk_Progress_Bar;
      Block_Spin      : Gtk_Spin_Button;
      X_Align_Spin    : Gtk_Spin_Button;
      Y_Align_Spin    : Gtk_Spin_Button;
      Step_Spin       : Gtk_Spin_Button;
      Act_Blocks_Spin : Gtk_Spin_Button;
      Label           : Gtk_Label;
      Omenu1          : Gtk_Option_Menu;
      Omenu1_Group    : Widget_SList.GSlist;
      Gentry          : Gtk_Entry;
      Timer           : G_Source_Id;
   end record;

   Pdata : ProgressData;

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

   function Help return String is
   begin
      return "A @bGtk_Progress_Bar@B is a widget that you can use to display"
        & " the status of an operation. In this example, the progress bar is"
        & " associated with a @bTimeout@B, and thus updates itself"
        & " periodically.";
   end Help;

   ----------------------
   -- Progress_Timeout --
   ----------------------

   function Progress_Timeout (Pbar : Gtk_Progress_Bar) return Boolean is
      pragma Warnings (Off, Pbar);
      New_Val : Gdouble;
      Adj     : constant Gtk_Adjustment := Get_Adjustment (Pdata.Pbar);

   begin
      New_Val := Get_Value (Adj) + 5.0;

      if New_Val > Get_Upper (Adj) then
         New_Val := Get_Lower (Adj);
      end if;

      Set_Value (Adj, New_Val);

      return True;
   end Progress_Timeout;

   ----------------------
   -- Destroy_Progress --
   ----------------------

   procedure Destroy_Progress (Window : access Gtk_Widget_Record'Class) is
      pragma Warnings (Off, Window);
   begin
      Remove (Pdata.Timer);
      Pdata.Omenu1_Group := Widget_SList.Null_List;
      Pdata.Timer := 0;
      --  Note: we are in a callback for destroy, so the window will be
      --  destroyed elsewhere. No need to do that here.
   end Destroy_Progress;

   ------------------------
   -- Toggle_Orientation --
   ------------------------

   procedure Toggle_Orientation (Widget : access Gtk_Widget_Record'Class) is
      pragma Warnings (Off, Widget);
      I : constant Natural := Selected_Button (Pdata.Omenu1_Group);
   begin
      Set_Orientation (Pdata.Pbar,
                       Gtk_Progress_Bar_Orientation'Val (3 - I));
   end Toggle_Orientation;

   ----------------------
   -- Toggle_Show_Text --
   ----------------------

   procedure Toggle_Show_Text (Widget : access Gtk_Check_Button_Record'Class)
   is
   begin
      Set_Show_Text (Progress  => Pdata.Pbar,
                     Show_Text => Get_Active (Widget));
      Set_Sensitive (Pdata.Gentry, Get_Active (Widget));
      Set_Sensitive (Pdata.X_Align_Spin, Get_Active (Widget));
      Set_Sensitive (Pdata.Y_Align_Spin, Get_Active (Widget));
   end Toggle_Show_Text;

   ------------------
   -- Adjust_Align --
   ------------------

   procedure Adjust_Align (Adj : access Gtk_Adjustment_Record'Class) is
      pragma Warnings (Off, Adj);
   begin
      Set_Text_Alignment
        (Pdata.Pbar,
         Gfloat (Get_Value (Pdata.X_Align_Spin)),
         Gfloat (Get_Value (Pdata.Y_Align_Spin)));
   end Adjust_Align;

   --------------------------
   -- Toggle_Activity_Mode --
   --------------------------

   procedure Toggle_Activity_Mode
     (Widget : access Gtk_Check_Button_Record'Class)
   is
   begin
      Set_Activity_Mode (Pdata.Pbar, Get_Active (Widget));
      Set_Sensitive (Pdata.Step_Spin, Get_Active (Widget));
      Set_Sensitive (Pdata.Act_Blocks_Spin, Get_Active (Widget));
   end Toggle_Activity_Mode;

   -------------------
   -- Entry_Changed --
   -------------------

   procedure Entry_Changed (Widget : access Gtk_Widget_Record'Class) is
      pragma Warnings (Off, Widget);
   begin
      Set_Format_String (Pdata.Pbar, Get_Text (Pdata.Gentry));
   end Entry_Changed;

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

   procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
      Vbox   : Gtk_Box;
      Vbox2  : Gtk_Box;
      Hbox   : Gtk_Box;
      Frame2 : Gtk_Frame;
      Align  : Gtk_Alignment;
      Adj    : Gtk_Adjustment;
      Label  : Gtk_Label;
      Tab    : Gtk_Table;
      Check  : Gtk_Check_Button;

   begin
      Set_Label (Frame, "Progress Bar");

      Pdata.Timer := 0;

      Gtk_New_Vbox (Vbox, False, 5);
      Set_Border_Width (Vbox, 10);
      Add (Frame, Vbox);

      Widget_Handler.Connect
        (Vbox, "destroy",
         Widget_Handler.To_Marshaller (Destroy_Progress'Access));

      Gtk_New (Frame2, "Progress");
      Pack_Start (Vbox, Frame2, False, True, 0);

      Gtk_New_Vbox (Vbox2, False, 5);
      Add (Frame2, Vbox2);

      Gtk_New (Align,
               Xalign => 0.5,
               Yalign => 0.5,
               Xscale => 0.0,
               Yscale => 0.0);
      Pack_Start (Vbox2, Align, False, False, 5);

      Gtk_New (Pdata.Pbar);
      Configure (Pdata.Pbar, 1.0, 1.0, 300.0);
      Set_Format_String (Pdata.Pbar, "%v from [%l,%u] (=%p%%)");
      Add (Align, Pdata.Pbar);

      Pdata.Timer := Time_Cb.Timeout_Add
        (100, Progress_Timeout'Access, Pdata.Pbar);

      Gtk_New (Align,
               Xalign => 0.5,
               Yalign => 0.5,
               Xscale => 0.0,
               Yscale => 0.0);
      Pack_Start (Vbox2, Align, False, False, 5);

      Gtk_New_Hbox (Hbox, False, 5);
      Add (Align, Hbox);

      Gtk_New (Label, "Label updated by user :");
      Pack_Start (Hbox, Label, False, True, 0);

      Gtk_New (Pdata.Label, "");
      Pack_Start (Hbox, Pdata.Label, False, True, 0);

      Gtk_New (Frame2, "Options");
      Pack_Start (Vbox, Frame2, False, True, 0);

      Gtk_New_Vbox (Vbox2, False, 5);
      Add (Frame2, Vbox2);

      Gtk_New (Tab,
               Rows        => 7,
               Columns     => 2,
               Homogeneous => False);
      Pack_Start (Vbox2, Tab, False, True, 0);

      Gtk_New (Label, "Orientation :");
      Attach (Tab, Label, 0, 1, 0, 1, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);
      Set_Alignment (Label, 0.0, 0.5);

      Build_Option_Menu (Pdata.Omenu1, Pdata.Omenu1_Group,
                         Items1, 0, Toggle_Orientation'Access);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 0, 1, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);
      Pack_Start (Hbox, Pdata.Omenu1, True, True, 0);

      Gtk_New (Check, "Show Text");
      Check_Handler.Connect
        (Check, "clicked",
         Check_Handler.To_Marshaller (Toggle_Show_Text'Access));
      Attach (Tab, Check, 0, 1, 1, 2, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 1, 2, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New (Label, "Format : ");
      Pack_Start (Hbox, Label, False, True, 0);

      Gtk_New (Pdata.Gentry);
      Widget_Handler.Object_Connect
        (Pdata.Gentry, "changed",
         Widget_Handler.To_Marshaller (Entry_Changed'Access),
         Slot_Object => Pdata.Gentry);
      Pack_Start (Hbox, Pdata.Gentry, True, True, 0);
      Set_Text (Pdata.Gentry, "%v from [%l,%u] (=%p%%)");
      Set_USize (Pdata.Gentry, 100, -1);
      Set_Sensitive (Pdata.Gentry, False);

      Gtk_New (Label, "Text align :");
      Attach (Tab, Label, 0, 1, 2, 3, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);
      Set_Alignment (Label, 0.0, 0.5);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 2, 3, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New (Label, "x :");
      Pack_Start (Hbox, Label, False, True, 5);

      Gtk_New (Adj,
               Value          => 0.5,
               Lower          => 0.0,
               Upper          => 1.0,
               Step_Increment => 0.1,
               Page_Increment => 0.1,
               Page_Size      => 0.0);
      Gtk_New (Pdata.X_Align_Spin, Adj, Climb_Rate => 0.0, The_Digits => 1);
      Pack_Start (Hbox, Pdata.X_Align_Spin, False, True, 0);
      Set_Sensitive (Pdata.X_Align_Spin, False);
      Adj_Handler.Connect
        (Adj, "value_changed",
         Adj_Handler.To_Marshaller (Adjust_Align'Access));

      Gtk_New (Label, "y :");
      Pack_Start (Hbox, Label, False, True, 5);

      Gtk_New (Adj,
               Value          => 0.5,
               Lower          => 0.0,
               Upper          => 1.0,
               Step_Increment => 0.1,
               Page_Increment => 0.1,
               Page_Size      => 0.0);
      Gtk_New (Pdata.Y_Align_Spin, Adj, Climb_Rate => 0.0, The_Digits => 1);
      Pack_Start (Hbox, Pdata.Y_Align_Spin, False, True, 0);
      Set_Sensitive (Pdata.Y_Align_Spin, False);
      Adj_Handler.Connect
        (Adj, "value_changed",
         Adj_Handler.To_Marshaller (Adjust_Align'Access));

      Gtk_New (Label, "Block count :");
      Attach (Tab, Label, 0, 1, 4, 5, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);
      Set_Alignment (Label, 0.0, 0.5);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 4, 5, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New (Adj,
               Value          => 10.0,
               Lower          => 2.0,
               Upper          => 20.0,
               Step_Increment => 1.0,
               Page_Increment => 5.0,
               Page_Size      => 0.0);
      Gtk_New (Pdata.Block_Spin, Adj, Climb_Rate => 0.0, The_Digits => 0);
      Pack_Start (Hbox, Pdata.Block_Spin, False, True, 0);
      Set_Sensitive (Pdata.Block_Spin, False);

      Gtk_New (Check, "Activity mode");
      Check_Handler.Connect
        (Check, "clicked",
         Check_Handler.To_Marshaller (Toggle_Activity_Mode'Access));
      Attach (Tab, Check, 0, 1, 5, 6, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 5, 6, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New (Label, "Step size :");
      Pack_Start (Hbox, Label, False, True, 0);

      Gtk_New (Adj,
               Value          => 3.0,
               Lower          => 1.0,
               Upper          => 20.0,
               Step_Increment => 1.0,
               Page_Increment => 5.0,
               Page_Size      => 0.0);
      Gtk_New (Pdata.Step_Spin, Adj, Climb_Rate => 0.0, The_Digits => 0);
      Pack_Start (Hbox, Pdata.Step_Spin, False, True, 0);
      Set_Sensitive (Pdata.Step_Spin, False);

      Gtk_New_Hbox (Hbox, False, 0);
      Attach (Tab, Hbox, 1, 2, 6, 7, Enums.Expand or Enums.Fill,
              Enums.Expand or Enums.Fill, 5, 5);

      Gtk_New (Label, "Blocks :");
      Pack_Start (Hbox, Label, False, True, 0);

      Gtk_New (Adj,
               Value          => 5.0,
               Lower          => 2.0,
               Upper          => 10.0,
               Step_Increment => 1.0,
               Page_Increment => 5.0,
               Page_Size      => 0.0);
      Gtk_New (Pdata.Act_Blocks_Spin, Adj, Climb_Rate => 0.0,
               The_Digits => 0);
      Pack_Start (Hbox, Pdata.Act_Blocks_Spin, False, True, 0);
      Set_Sensitive (Pdata.Act_Blocks_Spin, False);

      Show_All (Vbox);
   end Run;

end Create_Progress;