Commit 32b5904

@@ -19,13 +19,13 @@ class ApplicationShell < Window
     @frame = Gtk::Frame.new
     table.attach(@frame, 0, 2, 1, 3, Gtk::FILL | Gtk::EXPAND, Gtk::FILL | Gtk::EXPAND, 1, 1)
 
-    right_button = Gtk::Button.new "Right"
+    right_button = Gtk::Button.new("Right")
     right_button.set_size_request(50, 30)
     table.attach(right_button, 3, 4, 1, 2, Gtk::FILL, Gtk::SHRINK, 1, 1)
 
     valign = Gtk::Alignment.new 0, 0, 0, 0
-    wrong_button = Gtk::Button.new "Wrong"
-    wrong_button.set_size_request 70, 30
+    wrong_button = Gtk::Button.new("Wrong")
+    wrong_button.set_size_request(70, 30)
     valign.add(wrong_button)
     table.set_row_spacing(1, 3)
     table.attach(valign, 3, 4, 2, 3, Gtk::FILL, Gtk::FILL | Gtk::EXPAND, 1, 1)

@@ -0,0 +1,7 @@
+module Signal
+  def on(event, &command)
+    self.signal_connect(event.to_s) do |*args|
+      command.call(*args)
+    end
+  end
+end

@@ -1,11 +1,10 @@
+require 'signal'
+
 class Window < Gtk::Window
+  include Signal
+
   def initialize
     super
   end
-
-  def on(event, &command)
-    self.signal_connect(event.to_s) do |*args|
-      command.call(*args)
-    end
-  end
 end
+