// 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 __LOGCLIENTCHANGEOBSERVER_H__

 #define __LOGCLIENTCHANGEOBSERVER_H__

 // System includes

 #include <logwrap.h>

 /**

 Constants

 @internalComponent

 */

 const TUid KLogClientChangeEventLogCleared = { 0x101F8C4F };

 const TUid KLogClientChangeEventRefreshView = { 0x1020601B }; 

 /** 

 This class allows a client of the log engine to observe specific change 

 events within a given view.

 @publishedAll 

 @released

 */

 class MLogClientChangeObserver

 	{

 public:

 	/** Handle a global change within the logs database

 	This method is called when a generic event occurs within the log database. 

 	Such events are	not specific to a view (see MLogViewChangeObserver for view 

 	specific events).

 	@param aChangeType The uid corresponding to the type of event which 

 	occurred.

 	@param aChangeParam1 A context-specific change paramater which can be 

 	interpreted	based on the change type.

 	@param aChangeParam2 A context-specific change paramater which can be 

 	interpreted based on the change type.

 	@param aChangeParam3 A context-specific change paramater which can be 

 	interpreted	based on the change type.

 	A list of change types and their associated parameters follows:

 	KLogClientChangeEventLogCleared - no parameters. This event occurs when 

 	the log database is cleared.	 

 	KLogClientChangeEventRefreshView - no parameters. This event occurs when 

 	the client needs to refresh their view. For example, this occurs after the

 	log database has been restored from a backup. */

 	virtual void HandleLogClientChangeEventL(TUid aChangeType, TInt aChangeParam1, TInt aChangeParam2, TInt aChangeParam3) = 0;

 private:

 	IMPORT_C virtual void MLogClientChangeObserver_Reserved1();

 	IMPORT_C virtual void MLogClientChangeObserver_Reserved2();

 	};

 #endif