widget: assign default value proeprties if they are passed into parameters at __init__

kivy/uix/widget.py

@@ -68,7 +68,15 @@ class Widget(EventDispatcher):
         self.register_event_type('on_touch_up')
         self.register_event_type('on_draw')
 
+        # Before doing anything, ensure the windows exist.
         EventLoop.ensure_window()
+
+        # Apply the existing arguments to our widget
+        for key, value in kwargs.iteritems():
+            if hasattr(self, key):
+                setattr(self, key, value)
+
+        # Create the default canvas
         self.canvas = Canvas()
 
         # Apply all the styles
@@ -76,7 +84,6 @@ class Widget(EventDispatcher):
 
 
 
-
     #
     # Collision
     #