Interface Changeable

    • Method Detail

      • addChangeListener

        void addChangeListener​(ChangeListener cl)
        Deprecated.
        use addChangeListener(cl, ChangeType.UNKNOWN)
        Add a listener that will be informed of all changes.
        Parameters:
        cl - the ChangeListener to add
      • addChangeListener

        void addChangeListener​(ChangeListener cl,
                               ChangeType ct)
        Add a listener that will be informed of changes of a given type.
        Parameters:
        cl - the ChangeListener
        ct - the ChangeType it is to be informed of
      • removeChangeListener

        void removeChangeListener​(ChangeListener cl)
        Deprecated.
        use removeChangeListener(cl, ChangeType.UNKNOWN)
        Remove a listener that was interested in all types of changes.
        Parameters:
        cl - a ChangeListener to remove
      • removeChangeListener

        void removeChangeListener​(ChangeListener cl,
                                  ChangeType ct)
        Remove a listener that was interested in a specific types of changes.
        Parameters:
        cl - a ChangeListener to remove
        ct - the ChangeType that it was interested in
      • isUnchanging

        boolean isUnchanging​(ChangeType ct)

        A particular ChangeType can never be raised by this Changeable.

        If this returns true, then it is guaranteed that change events of this type (and all child types) can never under any circumstances be fired by this Changeable instance. If it returns false, that does not mean that this type of event will or even can be raised, but that it is worth registering listeners incase.

        Parameters:
        ct - the ChangeType to check
        Returns:
        true if ChangeEvents of this type are guaranteed to never be fired