diff --git a/kivyblocks/twosides.py b/kivyblocks/twosides.py
index a8d52ce..a3e6f29 100644
--- a/kivyblocks/twosides.py
+++ b/kivyblocks/twosides.py
@@ -2,13 +2,12 @@ from kivy.clock import Clock
 from kivy.uix.boxlayout import BoxLayout
 from kivy.factory import Factory
 from kivy.core.window import Window
+from kivy.properties import StringProperty
 
-from kivyblocks.ready import WidgetReady
-
-class TwoSides(WidgetReady, BoxLayout):
+class TwoSides(BoxLayout):
+	panel_shape = StringProperty('landscape')
 	def __init__(self,landscape={},portrait={},**kw):
 		BoxLayout.__init__(self,**kw)
-		WidgetReady.__init__(self)
 		blocks = Factory.Blocks()
 		self.landscape_widget = blocks.widgetBuild(landscape)
 		blocks = Factory.Blocks()
@@ -16,22 +15,46 @@ class TwoSides(WidgetReady, BoxLayout):
 		self.on_size_task = None
 		self.ready_task = None
 		self.register_event_type('on_interactive')
+		self.register_event_type('on_beforeswitch_landscape')
+		self.register_event_type('on_afterswitch_landscape')
+		self.register_event_type('on_beforeswitch_portrait')
+		self.register_event_type('on_afterswitch_portrait')
 
 	def on_size(self,*args):
 		if self.width >= self.height:
-			print('twosides.py:Window.rotation=', Window.rotation,
-				Window.size)
 			if not self.landscape_widget in self.children:
+				self.dispatch('on_beforeswitch_landscape')
 				self.clear_widgets()
 				self.add_widget(self.landscape_widget)
+				self.panel_shape = 'landscape'
+				self.dispatch('on_afterswitch_landscape')
 		else:
 			print('twosides.py:Window.rotation=', Window.rotation,
 				Window.size)
 			if not self.portrait_widget in self.children:
+				self.dispatch('on_beforeswitch_landscape')
 				self.clear_widgets()
 				self.add_widget(self.portrait_widget)
+				self.panel_shape = 'portrait'
+				self.dispatch('on_afterswitch_landscape')
 				self.dispatch('on_interactive')
 
+	def on_beforeswitch_landscape(self, *args):
+		pass
+
+	def on_afterswitch_landscape(self, *args):
+		print('twosides.py:Window.rotation=', Window.rotation,
+			Window.size)
+		pass
+
+	def on_beforeswitch_portrait(self, *args):
+		pass
+
+	def on_afterswitch_portrait(self, *args):
+		print('twosides.py:Window.rotation=', Window.rotation,
+			Window.size)
+		pass
+
 	def on_interactive(self, *args):
 		pass