------------------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 1998-2018, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, 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 MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Glib; use Glib;
with Gtk.Box; use Gtk.Box;
with Gtk.Button; use Gtk.Button;
with Gtk.Label; use Gtk.Label;
with Gtk.Main; use Gtk.Main;
with Gtk.Widget; use Gtk.Widget;
with Gtk; use Gtk;
with Common; use Common;
with Ada.Text_IO;
package body Create_Main_Loop is
------------------
-- Loop_Destroy --
------------------
procedure Loop_Destroy (Win : access Gtk_Widget_Record'Class) is
pragma Unreferenced (Win);
begin
Main_Quit;
end Loop_Destroy;
----------
-- Help --
----------
function Help return String is
begin
return "This demo creates a second event loop. All the events are now"
& " processed in this second loop. You start this second loop by"
& " calling again the @bGtk.Main.Main@B function. The interesting"
& " side effect is that this procedure call is blocking until"
& " the procedure @bMain_Quit@B is called. Thus, you can prevent"
& " your program from exiting a given function until some condition"
& " is met.";
end Help;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Label : Gtk_Label;
Button : Gtk_Button;
Box : Gtk_Box;
begin
Set_Label (Frame, "Test Main Loop");
Gtk_New_Vbox (Box, Homogeneous => False, Spacing => 0);
Add (Frame, Box);
Gtk_New (Label, "In recursive main loop...");
Set_Padding (Label, 20, 20);
Pack_Start (Box, Label, False, False, 0);
Gtk_New (Button, "Leave one instance of the main loop");
Pack_Start (Box, Button, False, False, 0);
Widget_Handler.Connect (Button, "clicked", Loop_Destroy'Access);
Button.Set_Can_Default (True);
Grab_Default (Button);
Show_All (Frame);
Ada.Text_IO.Put_Line
("Create_Mainloop: start (and block in the current function)");
Gtk.Main.Main;
Ada.Text_IO.Put_Line
("Create_Mainloop: done (leave the initial function");
Ada.Text_IO.Put_Line
("Clicking again on the button might leave testgtk itself.");
end Run;
end Create_Main_Loop;
