Factor out window logic to ChatWindow.

Hook the sketchpad to ctrl+s combination

sugar/chat/ChatWindow.py

@@ -0,0 +1,28 @@
+import pygtk
+pygtk.require('2.0')
+import gtk
+
+from sugar.chat.Chat import Chat
+
+class ChatWindow(gtk.Window):
+	def __init__(self):
+		gtk.Window.__init__(self)
+		self._chat = None
+		self.connect("key-press-event", self.__key_press_event_cb)
+	
+	def set_chat(self, chat):
+		if self._chat != None:
+			self.remove(self._chat)
+
+		self._chat = chat
+		self.add(self._chat)
+		self._chat.show()
+
+	def __key_press_event_cb(self, window, event):
+		if event.keyval == gtk.keysyms.s and \
+		   event.state & gtk.gdk.CONTROL_MASK:
+			if self._chat.get_mode() == Chat.SKETCH_MODE:
+			   self._chat.set_mode(Chat.TEXT_MODE)
+			elif self._chat.get_mode() == Chat.TEXT_MODE:
+			   self._chat.set_mode(Chat.SKETCH_MODE)			
+