Converts code to Gtk 3.0. The GUI is back ready to take off

Ivolution.py

@@ -1,24 +1,20 @@
 #!/usr/bin/env python
 
-# First run tutorial.glade through gtk-builder-convert with this command:
-# gtk-builder-convert tutorial.glade tutorial.xml
-# Then save this file as tutorial.py and make it executable using this command:
-# chmod a+x tutorial.py
-# And execute it:
-# ./tutorial.py
-
-import pygtk
-pygtk.require("2.0")
-import gtk
+from gi.repository import Gtk
 
 class Ivolution(object):       
 	def __init__(self):
-	    builder = gtk.Builder()
-	    builder.add_from_file("data/ui/ivolution_window.xml")
+	    builder = Gtk.Builder()
+	    builder.add_from_file("data/ui/IvolutionWindow.glade")
 	    #builder.connect_signals({ "on_window_destroy" : gtk.main_quit })
-	    self.window = builder.get_object("window")
+	    self.window = builder.get_object("ivolution_window")
 	    self.window.show()
 
+	def on_destroy(self, widget, data=None):
+		"""Called when the IvolutionWindow is closed."""
+		# Clean up code for saving application state should be added here.
+		Gtk.main_quit()
+
 if __name__ == "__main__":
 	app = Ivolution()
-	gtk.main()ivolution_window.xml
+	Gtk.main()