/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Defination for screensaver shared data monitoring.

*

*/

#ifndef C_SCREENSAVERSHAREDDATAMONITOR_H

#define C_SCREENSAVERSHAREDDATAMONITOR_H

// INCLUDES

#include <e32property.h>

// CLASS DECLARATION

class CScreensaverSharedDataI;

class CScreensaverRepositoryWatcher;

class CScreensaverEngine;

class CScreensaverView;

class CSubscriber;

/**

 *  Cscreensavershareddatamonitor

 * 

 */

class CScreensaverSharedDataMonitor : public CBase

    {

public:

    // Constructors and destructor

    /**

     * Destructor.

     */

    ~CScreensaverSharedDataMonitor( );

    /**

     * Two-phased constructor.

     */

    static CScreensaverSharedDataMonitor* NewL( CScreensaverSharedDataI* aData );

private:

    /**

     * Constructor for performing 1st stage construction

     */

    CScreensaverSharedDataMonitor( CScreensaverSharedDataI* aData );

    /**

     * EPOC default constructor for performing 2nd stage construction

     */

    void ConstructL();

    /*

    * Returns the pointer of screensaver appui 

    */

    CScreensaverView* View();

    /*

    * Returns the refrence of model instance

    */

    CScreensaverEngine& Model();

    /**

    * detele CSubscriber

    */

    void DeleteSubscriber( CSubscriber*& aSubscriber );

private:

    /**

    * Callback fuction. Called when the preview mode changed

    */

    static TInt HandlePreviewModeChanged(TAny* aPtr);

    /**

    * Callback fuction. Called when the MMC state changed

    */

    static TInt HandleMMCStateChanged(TAny* aPtr);

    /**

    * Callback fuction. Called when the USB state changed

    */

    static TInt HandleUSBStateChanged(TAny* aPtr);

    /**

    * Callback fuction. Called when the Keyguard state changed

    */

    static TInt HandleKeyguardStateChanged(TAny* aPtr);

    /**

    * Callback fuction. Called when the Call state changed

    */

    static TInt HandleCallStateChanged(TAny* aPtr);

    /**

    * Callback fuction. Called when the ShuttingDown state changed

    */

    static TInt HandleShuttingDownStateChanged(TAny* aPtr);

    static TInt HandleActivateSSChanged( TAny* aPtr );

private:

    /*

    * The data of model class, Not own 

    */

    CScreensaverSharedDataI* iData;

    /*

    * The Preview mode property and its monitor

    */

    RProperty iPreviewModeProperty;

    CSubscriber* iPreviewModeSubscriber;

    /*

    * The MMC property and its monitor

    */

    RProperty iMMCWatchProperty;

    CSubscriber* iMMCWatchSubscriber;

    /*

    * The USB property and its monitor 

    */

    RProperty iUSBWatchProperty;

    CSubscriber* iUSBWatchSubscriber;

    /*

    * The  KeyGuard state property and its watcher

    */

    RProperty iKeyguardStateProperty;

    CSubscriber* iKeyguardStateSubscriber;

    /*

    * The Call state property and its watcher 

    */

    RProperty iCallStateProperty;

    CSubscriber* iCallStateSubscriber;

    /*

    * The shutting down property and its watcher 

    */

    RProperty iShuttingDownProperty;

    CSubscriber* iShuttingDownSubscriber;

    RProperty iActivateSSProperty;

    CSubscriber* iActivateSSSubscriber;

    };

#endif // C_SCREENSAVERSHAREDDATAMONITOR_H