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Interface grendel.view.MessageSetViewObserver

Anyone who wants to know when messages are added, removed, or tweaked in a MessageSetView can implement this and add themselves to that MessageSetView's list of observers.

public interface  MessageSetViewObserver
          // Methods 1
     public abstract void messagesChanged(Enumeration, Enumeration, Enumeration);



   public abstract void messagesChanged(Enumeration inserted, 
                                        Enumeration deleted, 
                                        Enumeration changed) 

Some messages changed. Each enumeration parameter might be null, or it might be an enumeration of ViewedMessage objects.

Parameter Description
inserted new messages that have appeared
deleted old messages that are no longer considered part of the MessageSetView
changed Messages that have had their internals tweaked in some way

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