// 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