Add Event Sources:event_sources

- Add source property in Action and EventFilter
- Change TPropContainer contructor to accept keyword arguments and set
  properties that were given
- Change every single TPropContainer subclass constructor to accept
  kwargs and pass them on to super init
- Add a "null" option for TStringProperty
Use Event Sources:
- Make the probe require a source property to install or subscribe
- Have ProbeProxy install and subscribe return a prefixed address
- Make update, uninstall and unsubsribe extract the prefix from the
  address
- Have the TutorialRunner set a source on actions/events before
  installing/subscribing instead of setting current activity on
  ProbeManager
Test Event Sources:
- Change the tests according to the new constructors and behaviors

1 files changed, 3 insertions, 6 deletions

diff --git a/addons/dialogmessage.py b/addons/dialogmessage.py
index fad6d2c..24646f8 100644
--- a/addons/dialogmessage.py
+++ b/addons/dialogmessage.py
@@ -22,20 +22,17 @@ class DialogMessage(Action):
     message = TStringProperty("Message")
     position = TArrayProperty((0, 0), 2, 2)
 
-    def __init__(self, message=None, position=None):
+    def __init__(self, **kwargs):
         """
         Shows a dialog with a given text, at the given position on the screen.
 
+        Accepted keyword args:
         @param message A string to display to the user
         @param position A list of the form [x, y]
         """
-        super(DialogMessage, self).__init__()
+        super(DialogMessage, self).__init__(**kwargs)
         self._dialog = None
         
-        if message:
-            self.message = message
-        if position: self.position = position
-
     def do(self, **kwargs):
         """
             Show the dialog