Merge branch 'master' of github.com:HampshireCS/CS112-Spring2012

samplecode/signals/signals.py

@@ -0,0 +1,41 @@
+"""
+A basic example showing how one might take advantage of using
+PyDispatcher/Louie.  To run this example, you must run:
+   sudo easy_install louie
+
+Why use signals?  What is this?  for now, start here:  http://pydispatcher.sourceforge.net/
+"""
+
+from louie import dispatcher
+
+class Player(object):
+    def __init__(self, name):
+        self.name = name
+
+        # connect this object's functions to certain signals
+        dispatcher.connect(self.move, signal="move_player", sender=self.name)
+        dispatcher.connect(self.hear, signal="listen_to")
+
+    def hear(self, sender, message):
+        if sender is not self:
+            print self.name, "hears", sender.name, "say", message
+
+    def move(self, x, y):
+        print "moving", self.name, "to", x, y
+
+    def shout(self, message):
+        dispatcher.send(signal="listen_to", message=message, sender=self)
+
+# create a bunch of players
+players = [ Player(name) for name in ["Alice", "Bob", "Jack", "Jill"] ]
+
+# moves the proper object
+dispatcher.send(signal="move_player", sender="Alice", x=5, y=8)
+dispatcher.send(signal="move_player", sender="Alice", x=0, y=2)
+dispatcher.send(signal="move_player", sender="Bob", x=-1, y=5)
+
+# does nothing because there is no carol
+dispatcher.send(signal="move_player", sender="Carol", x=-1, y=5)
+
+# says the same thing to every player
+players[0].shout("Hi guys!")