Add 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, 3 deletions

diff --git a/tutorius/actions.py b/tutorius/actions.py
index cf586f2..6d1f58e 100644
--- a/tutorius/actions.py
+++ b/tutorius/actions.py
@@ -165,9 +165,9 @@ class DragWrapper(object):
 
 class Action(TPropContainer):
     """Base class for Actions"""
-    def __init__(self):
-        TPropContainer.__init__(self)
-        self.position = (0,0)
+    source = TStringProperty(None, null=True)
+    def __init__(self, **kwargs):
+        super(Action, self).__init__(**kwargs)
         self._drag = None
         # The callback that will be triggered when the action is requested
         # to notify all its changes