--- a/epoc32/include/logviewchangeobserver.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/logviewchangeobserver.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,80 @@
-logviewchangeobserver.h
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#ifndef __LOGVIEWCHANGEOBSERVER_H__
+#define __LOGVIEWCHANGEOBSERVER_H__
+
+// System includes
+#include <logwrap.h>
+
+/**
+This class allows a client of the log engine to observe specific change events within
+a given view.
+@publishedAll 
+@released
+*/
+class MLogViewChangeObserver
+	{
+public:
+
+	/**Handle a change corresponding to a view addition
+	
+	This method is called when a log event is added to a view. The event maybe 
+	recently added,	or have existed for some time but only now meet the 
+	criteria of this view (i.e satisfy the filter) due to some other change.
+	
+	@param aId The id of the log event which has been added to the view.
+	@param aViewIndex The position within the view at which the event has been 
+	added.
+	@param aChangeIndex	In a series of changes, this is the index of the 
+	currently processing change. The change index will be greater than (or 
+	equal to) 0, and less than the total change count.
+	@param aTotalChangeCount This is the total count of all changes which will 
+	be processed in this batch.
+	 */
+	virtual void HandleLogViewChangeEventAddedL(TLogId aId, TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount) = 0;
+
+	/** Handle a change corresponding to a view change
+	
+	This method is called when a log event changes within a view.
+	
+	@param aId The id of the log event which has changed within the view.
+	@param aViewIndex The position within the view where the change occurred.
+	@param aChangeIndex	In a series of changes, this is the index of the 
+	currently processing change. The change index will be greater than (or 
+	equal to) 0, and less than the total change count.
+	@param aTotalChangeCount This is the total count of all changes which will 
+	be processed in this batch.
+	 */
+	virtual void HandleLogViewChangeEventChangedL(TLogId aId, TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount) = 0;
+
+	/** Handle a change corresponding to a view deletion
+	
+	This method is called when a log event is removed from a view.
+	
+	@param aId The id of the log event which has been removed from the view
+	@param aViewIndex The position within the view which the event previously 
+	held.
+	@param aChangeIndex In a series of changes, this is the index of the 
+	currently processing change. The change index will be greater than (or 
+	equal to) 0, and less than the total change count.
+	@param aTotalChangeCount This is the total count of all changes which 
+	will be processed in this batch
+	 */
+	virtual void HandleLogViewChangeEventDeletedL(TLogId aId, TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount) = 0;
+	};
+
+
+#endif