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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2010-2013, 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. --
-- --
-----------------------------------------------------------------------
with System; use System;
with System.Address_Image;
with Ada.Exceptions;
with Ada.Text_IO; use Ada.Text_IO;
with Interfaces.C.Strings; use Interfaces.C.Strings;
with Glib; use Glib;
with Glib.Error; use Glib.Error;
with Glib.Object; use Glib.Object;
with Gtk.Box; use Gtk.Box;
with Gtk.Builder; use Gtk.Builder;
with Gtk.Button; use Gtk.Button;
with Gtk.GEntry; use Gtk.GEntry;
with Gtk.Frame; use Gtk.Frame;
with Gtk.Handlers;
with Gtk.Text_Buffer; use Gtk.Text_Buffer;
with Gtk.Text_View; use Gtk.Text_View;
with Gtk.Widget;
with Common; use Common;
package body Create_Builder is
Default_Filename : constant String := "gtkbuilder_example.xml";
-- This is the file from which we'll read our UI description.
procedure On_Button_Clicked (Button : access Gtk_Button_Record'Class);
-- Callback for a button click
------------------------------
-- XML UI Callback Handling --
------------------------------
type Widget_Collection_Record is new Glib.Object.GObject_Record with record
Term1 : Gtk.GEntry.Gtk_Entry;
Term2 : Gtk.GEntry.Gtk_Entry;
Text_Field : Gtk.Text_View.Gtk_Text_View;
end record;
type Widget_Collection is access all Widget_Collection_Record'Class;
-- Type to use as User_Data when connecting signals.
package Widget_Collection_Cb is new Gtk.Handlers.Callback
(Widget_Collection_Record);
package Widget_Collection_Return_Cb is new Gtk.Handlers.Return_Callback
(Widget_Collection_Record, Boolean);
type Callback_Function_Name is
(On_Window1_Delete_Event,
On_Btn_Concatenate_Clicked,
On_Window1_Destroy,
On_Btn_Console_Greeting_Clicked);
-- An easy way to make sure that all callback functions are referenced
-- from within the Connect_Signals procedure and that no one has been
-- overlooked. The names of the callback functions must match the
-- "handler"s defined on the controls in the UI XML file.
procedure On_Btn_Concatenate_Clicked
(Object : access Widget_Collection_Record'Class);
procedure On_Btn_Console_Greeting_Clicked
(Object : access Widget_Collection_Record'Class);
function On_Window1_Delete_Event
(Object : access Widget_Collection_Record'Class) return Boolean;
procedure On_Window1_Destroy
(Object : access Widget_Collection_Record'Class);
-- Callbacks referenced by our XML UI definition. These match the
-- items in the Callback_Function_Name enumeration.
procedure Connect_Signals
(C_Builder : System.Address;
C_Object : System.Address;
C_Signal_Name : Interfaces.C.Strings.chars_ptr;
C_Handler_Name : Interfaces.C.Strings.chars_ptr;
C_Connect_Object : System.Address;
Flags : Glib.G_Connect_Flags;
User_Data : System.Address);
pragma Convention (C, Connect_Signals);
-- Subprogram to perform signal connections.
---------------------
-- Connect_Signals --
---------------------
procedure Connect_Signals
(C_Builder : System.Address;
C_Object : System.Address;
C_Signal_Name : Interfaces.C.Strings.chars_ptr;
C_Handler_Name : Interfaces.C.Strings.chars_ptr;
C_Connect_Object : System.Address;
Flags : Glib.G_Connect_Flags;
User_Data : System.Address)
is
pragma Unreferenced (C_Builder);
Stub : Widget_Collection_Record;
Widgets : constant Widget_Collection :=
Widget_Collection (Get_User_Data (User_Data, Stub));
Widget : constant GObject := Convert (C_Object);
After : constant Boolean := (Flags and G_Connect_After) /= 0;
Signal_Name : constant String := Value (C_Signal_Name);
Handler_Name : constant String := Value (C_Handler_Name);
Function_Name : constant Callback_Function_Name :=
Callback_Function_Name'Value (Handler_Name);
-- Local translations from our low-level arguments
begin
-- Tell the console what we are up to.
Put_Line ("Connect_Signals callback invoked: ");
Put_Line (" object " & System.Address_Image (C_Object)
& " emitting " & Signal_Name);
Put_Line (" to " & Handler_Name & ", with flags:" & Flags'Img);
if C_Connect_Object /= System.Null_Address then
Put_Line (" Warning: Connect_Object parameter will be ignored"
& "(replaced by Widget_Collection)");
end if;
-- Normalize the name of the handler to our Callback_Function_Name
-- enumeration.
case Function_Name is
when On_Btn_Concatenate_Clicked =>
Widget_Collection_Cb.Object_Connect
(Widget => Widget,
Name => "clicked",
Marsh => Widget_Collection_Cb.To_Marshaller
(On_Btn_Concatenate_Clicked'Access),
Slot_Object => Widgets,
After => After);
when On_Window1_Delete_Event =>
Widget_Collection_Return_Cb.Object_Connect
(Widget => Widget,
Name => "delete_event",
Marsh => Widget_Collection_Return_Cb.To_Marshaller
(On_Window1_Delete_Event'Access),
Slot_Object => Widgets,
After => After);
when On_Window1_Destroy =>
Widget_Collection_Cb.Object_Connect
(Widget => Widget,
Name => "destroy",
Marsh => Widget_Collection_Cb.To_Marshaller
(On_Window1_Destroy'Access),
Slot_Object => Widgets,
After => After);
when On_Btn_Console_Greeting_Clicked =>
Widget_Collection_Cb.Object_Connect
(Widget => Widget,
Name => "clicked",
Marsh => Widget_Collection_Cb.To_Marshaller
(On_Btn_Console_Greeting_Clicked'Access),
Slot_Object => Widgets,
After => After);
end case;
end Connect_Signals;
-----------------------
-- On_Button_Clicked --
-----------------------
procedure On_Button_Clicked (Button : access Gtk_Button_Record'Class) is
pragma Unreferenced (Button);
Builder1 : Gtk_Builder;
Error : GError;
Widgets : Widget_Collection;
begin
-- Create a new Gtk_Builder object
Gtk_New (Builder1);
-- Allocate memory for our Widgets_Collection
Widgets := new Widget_Collection_Record;
Glib.Object.Initialize (Widgets);
-- Read in our XML file
Error := Add_From_File (Builder1, Default_Filename);
if Error /= null then
Put_Line ("Error [Create_Builder.On_Button_Clicked]: "
& Get_Message (Error));
Error_Free (Error);
end if;
-- Look up widgets for which we have callbacks, and store the
-- information in Widget_Collection_Record structure.
Widgets.Term1 := Gtk.GEntry.Gtk_Entry (Get_Widget (Builder1, "term1"));
Widgets.Term2 := Gtk.GEntry.Gtk_Entry (Get_Widget (Builder1, "term2"));
Widgets.Text_Field := Gtk.Text_View.Gtk_Text_View
(Get_Widget (Builder1, "textField"));
-- Connect signal handlers
Connect_Signals_Full
(Builder1,
Connect_Signals'Access,
Glib.Object.Get_Object (Widgets));
-- Find our main window, then display it and all of its children.
Gtk.Widget.Show_All (Get_Widget (Builder1, "window1"));
end On_Button_Clicked;
--------------------------------
-- On_Btn_Concatenate_Clicked --
--------------------------------
procedure On_Btn_Concatenate_Clicked
(Object : access Widget_Collection_Record'Class)
is
Buffer : Gtk_Text_Buffer;
begin
Put_Line ("On_Btn_Concatenate_Clicked");
Buffer := Get_Buffer (Object.Text_Field);
Insert_At_Cursor
(Buffer,
"Concatenated: " &
Get_Text (Object.Term1) &
Get_Text (Object.Term2) &
ASCII.LF);
exception
when Event : others =>
Put_Line ("Error: " & Ada.Exceptions.Exception_Information (Event));
end On_Btn_Concatenate_Clicked;
-------------------------------------
-- On_Btn_Console_Greeting_Clicked --
-------------------------------------
procedure On_Btn_Console_Greeting_Clicked
(Object : access Widget_Collection_Record'Class)
is
pragma Unreferenced (Object);
begin
Put_Line ("On_Btn_Console_Greeting_Clicked says: HELLO!!!");
end On_Btn_Console_Greeting_Clicked;
-----------------------------
-- On_Window1_Delete_Event --
-----------------------------
function On_Window1_Delete_Event
(Object : access Widget_Collection_Record'Class)
return Boolean
is
pragma Unreferenced (Object);
begin
Put_Line ("On_Window1_Delete_Event");
-- Stop unconditionally.
return False;
end On_Window1_Delete_Event;
------------------------
-- On_Window1_Destroy --
------------------------
procedure On_Window1_Destroy
(Object : access Widget_Collection_Record'Class)
is
pragma Unreferenced (Object);
begin
-- We actually don't do much here, since within testgtk, we're not
-- the main window.
Put_Line ("On_Window1_Destroy");
end On_Window1_Destroy;
----------
-- Help --
----------
function Help return String is
begin
return "A @bGtk_Builder@B is an auxiliary object that reads textual"
& " descriptions of a user interface and instantiates the described"
& " objects. To pass a description to a @bGtk_Builder@B, call"
& " @bAdd_From_File@B or @bAdd_From_String@B. These functions can"
& " be called multiple times; the builder merges the content of all"
& " descriptions.";
end Help;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Box1 : Gtk_Box;
Button1 : Gtk_Button;
begin
Set_Label (Frame, "Builder");
Gtk_New_Vbox (Box1, False, 0);
Add (Frame, Box1);
Gtk_New (Button1, "Invoke Builder with file " & Default_Filename);
Button_Handler.Connect (Button1, "clicked", On_Button_Clicked'Access);
Pack_Start
(Box1, Button1, Expand => False, Fill => False, Padding => 10);
Show_All (Frame);
end Run;
end Create_Builder;
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