File: create_selection.adb

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-----------------------------------------------------------------------
--          GtkAda - Ada95 binding for the Gimp Toolkit              --
--                                                                   --
--                     Copyright (C) 2000                            --
--        Emmanuel Briot, Joel Brobecker and Arnaud Charlet          --
--                     Copyright (C) 2001-2006 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 Gtk.Frame;      use Gtk.Frame;
with Gtk.Button;     use Gtk.Button;
with Gtk.Clipboard;  use Gtk.Clipboard;
with Gtk.Text_Iter;   use Gtk.Text_Iter;
with Gtk.Text_View;   use Gtk.Text_View;
with Gtk.Text_Buffer; use Gtk.Text_Buffer;
with Gtk.Box;        use Gtk.Box;
with Gtk.Handlers;   use Gtk.Handlers;
with Gtk.Label;      use Gtk.Label;
with Gtk.Scrolled_Window; use Gtk.Scrolled_Window;

package body Create_Selection is

   type My_Button_Record is new Gtk_Button_Record with record
      Text      : Gtk_Text_Buffer;
      Text_View : Gtk_Text_View;
      Label     : Gtk_Label;
   end record;
   type My_Button is access all My_Button_Record'Class;

   package My_Button_Handler is new Gtk.Handlers.Callback
     (My_Button_Record);

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

   function Help return String is
   begin
      return "This package demonstrates how to interact with the clipboard to"
        & " retrieve text copied from other applications" & ASCII.LF
        & "Try selecting some other text outside of this demo, and press"
        & " once again the button at the top.";
   end Help;

   ---------------------
   -- On_Button_Click --
   ---------------------

   procedure On_Button_Click (Button : access My_Button_Record'Class) is
      Text : constant String := Wait_For_Text (Gtk.Clipboard.Get);
      Iter : Gtk_Text_Iter;
   begin
      --  For the text buffer, we query directly the clipboard
      Get_End_Iter (Button.Text, Iter);
      Insert (Button.Text, Iter, Text);
   end On_Button_Click;

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

   procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
      Box    : Gtk_Box;
      Button : My_Button;
      Scrolled : Gtk_Scrolled_Window;
   begin
      Set_Label (Frame, "Selection");

      Gtk_New_Vbox (Box, Homogeneous => False);
      Add (Frame, Box);

      Button := new My_Button_Record;
      Initialize  (Button, "Paste the selection/clipboard");
      Pack_Start (Box, Button, Fill => False, Expand => False);
      My_Button_Handler.Connect
        (Button, "clicked",
         My_Button_Handler.To_Marshaller (On_Button_Click'Access));

      --  The text

      Gtk_New (Scrolled);
      Pack_Start (Box, Scrolled, Fill => True, Expand => True);

      Gtk_New (Button.Text);
      Gtk_New (Button.Text_View, Button.Text);
      Add (Scrolled, Button.Text_View);

      Show_All (Frame);
   end Run;

end Create_Selection;