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|
-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2000 --
-- Emmanuel Briot, Joel Brobecker and Arnaud Charlet --
-- --
-- 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 Hello2_Package; use Hello2_Package;
with Gtk.Main;
with Gtk.Box, Gtk.Window, Gtk.Button; use Gtk.Box, Gtk.Window, Gtk.Button;
procedure Hello2 is
Window : Gtk_Window;
Button : Gtk_Button;
Box1 : Gtk_Box;
begin
-- This is called in all GtkAda applications. Arguments are parsed
-- from the command line and are returned to the application.
Gtk.Main.Init;
-- Creates a new window
Gtk.Window.Gtk_New (Window);
-- This is a new call, which just sets the title of our new window to
-- "Hello Buttons!"
Gtk.Window.Set_Title (Window, "Hello Buttons!");
-- Here we just set a handler for delete_event that immediately exits GTK.
Return_Handlers.Connect
(Window, "delete_event",
Return_Handlers.To_Marshaller (Delete_Event'Access));
-- Sets the border width of the window.
Gtk.Window.Set_Border_Width (Window, 10);
-- We create a box to pack widgets into. This is described in detail
-- in the "packing" section. The box is not really visible, it
-- is just used as a tool to arrange widgets.
Gtk_New_Hbox (Box1, False, 0);
-- Put the box into the main window.
Gtk.Window.Add (Window, Box1);
-- Creates a new button with the label "Button 1".
Gtk_New (Button, "Button 1");
-- Now when the button is clicked, we call the "callback" function
-- with a pointer to "button 1" as its argument
Handlers.Connect
(Button, "clicked", Handlers.To_Marshaller (Hello_Callback'Access),
new String'("button 1"));
-- Instead of gtk_container_add, we pack this button into the invisible
-- box, which has been packed into the window. */
Pack_Start (Box1, Button, True, True, 0);
-- Always remember this step, this tells GtkAda that our preparation for
-- this button is complete, and it can now be displayed.
Show (Button);
-- Do these same steps again to create a second button
-- Creates a new button with the label "Button 2".
Gtk_New (Button, "Button 2");
-- Call the same callback function with a different argument,
-- passing a pointer to "button 2" instead.
Handlers.Connect
(Button, "clicked", Handlers.To_Marshaller (Hello_Callback'Access),
new String'("button 2"));
-- Instead of gtk_container_add, we pack this button into the invisible
-- box, which has been packed into the window. */
Pack_Start (Box1, Button, True, True, 0);
-- The order in which we show the buttons is not really important, but I
-- recommend showing the window last, so it all pops up at once.
Show (Button);
Show (Box1);
Show (Window);
-- All GtkAda applications must have a Main. Control ends here
-- and waits for an event to occur (like a key press or mouse event).
Gtk.Main.Main;
end Hello2;
|
