from sugar.tutorius.properties import *

class Event(TPropContainer):
    source = TUAMProperty()
    type = TStringProperty("clicked")

    def __init__(self):
        TPropContainer.__init__(self)


    # Providing the hash methods necessary to use events as key
    # in a dictionary, if new properties are added we should
    # take them into account here
    def __hash__(self):
        return hash(str(self.source) + str(self.type))

    def __eq__(self, e2):
        return self.source == e2.source and self.type == e2.type
        

    # Adding methods for pickling and unpickling an object with
    # properties
    def __getstate__(self):
       return self._props.copy()

    def __setstate__(self, dict):
       self._props.update(dict)


# Nothing more needs to be added, the additional 
# information is in the object type
class ClickedEvent(Event):
    def __init__(self):
        Event.__init__(self)
        self.type = "clicked"