From 8acd9095e8f32ee20a6c4cd105d12a133fa9f346 Mon Sep 17 00:00:00 2001
From: Vincent Vinet <vince.vinet@gmail.com>
Date: Fri, 04 Dec 2009 05:06:49 +0000
Subject: 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
---
(limited to 'tutorius/properties.py')

diff --git a/tutorius/properties.py b/tutorius/properties.py
index bfdb32c..a0d63bb 100644
--- a/tutorius/properties.py
+++ b/tutorius/properties.py
@@ -49,12 +49,14 @@ class TPropContainer(object):
     at the cost of needing a mapping between container instances, and 
     property values. This is what TPropContainer does.
     """
-    def __init__(self):
+    def __init__(self, **kwargs):
         """
         Prepares the instance for property value storage. This is done at
         object initialization, thus allowing initial mapping of properties
         declared on the class. Properties won't work correctly without
         this call.
+
+        Keyword arguments will be evaluated as properties
         """
         # create property value storage
         object.__setattr__(self, "_props", {})
@@ -74,6 +76,10 @@ class TPropContainer(object):
         # to the creator to update its action edition dialog.
         self._diff_dict = {}
 
+        #Set attribute values that were supplied
+        for key, value in kwargs.items():
+            setattr(self, key, value)
+
     def __getattribute__(self, name):
         """
         Process the 'fake' read of properties in the appropriate instance
@@ -254,11 +260,15 @@ class TStringProperty(TutoriusProperty):
     Represents a string. Can have a maximum size limit.
     """
     widget_class = StringPropWidget
-    def __init__(self, value, size_limit=None):
+    def __init__(self, value, size_limit=None, null=False):
         TutoriusProperty.__init__(self)
         self.type = "string"
-        self.size_limit = MaxSizeConstraint(size_limit)
-        self.string_type = StringTypeConstraint()
+        if size_limit:
+            self.size_limit = MaxSizeConstraint(size_limit)
+        if null:
+            self.string_type = TypeConstraint((str, type(None)))
+        else:
+            self.string_type = StringTypeConstraint()
         
         self.default = self.validate(value)
     
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