Observable
==========

.. java:package:: ch.epfl.leb.sass.logging
   :noindex:

.. java:type:: public interface Observable

   Defines interface methods for logging changes in a microscope component.

   :author: Kyle M. Douglass

Methods
-------
addListener
^^^^^^^^^^^

.. java:method:: public void addListener(Listener listener)
   :outertype: Observable

   Adds a new listener to the list of subscribed listeners.

   :param listener: The listener to add to the list of subscribed listeners.

deleteListener
^^^^^^^^^^^^^^

.. java:method:: public void deleteListener(Listener listener)
   :outertype: Observable

   Deletes a listener from the list of subscribed listeners.

   :param listener: The listener to delete from the list of listeners.

notifyListeners
^^^^^^^^^^^^^^^

.. java:method:: public void notifyListeners()
   :outertype: Observable

   Notifies all subscribed listeners to a change in the Observable's state. This method should only be called if setChanged() has been called.

notifyListeners
^^^^^^^^^^^^^^^

.. java:method:: public void notifyListeners(Object data)
   :outertype: Observable

   Notifies all subscribed listeners of a state change and pushes the data.

   :param data: The data object to push to the listeners.

setChanged
^^^^^^^^^^

.. java:method:: public void setChanged()
   :outertype: Observable

   Indicates that the state of this Observable has been changed.