// Copyright (c) 2004-2009 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 "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:

// Component test of Publish and Subscribe

// 

//

/**

 @file

 @internalTechnology

*/

#ifndef __CPROPERTYWATCH_H__

#define __CPROPERTYWATCH_H__

#include <e32base.h>

#include <e32property.h>

#include "usbmsshared.h"

class CPropertyHandler;

class CStateMachine;

enum 

	{

	EUsbMsState_Read = EUsbMsDriveState_Error + 100,

	EUsbMsState_Written

	};

/**

 An active object that subscribes to a specified Mass Storage property and

 calls a provided handler each time the property is published.

 */

class CPropertyWatch : public CActive

	{

public:

	static CPropertyWatch* NewLC(TUsbMsDriveState_Subkey aSubkey, CPropertyHandler& aHandler);

private:

	CPropertyWatch(CPropertyHandler& aHandler);

	void ConstructL(TUsbMsDriveState_Subkey aSubkey);

	~CPropertyWatch();

	void RunL();

	void DoCancel();

	RProperty iProperty;

	CPropertyHandler& iHandler;

	};

/**

 A property handler class that handles the change of ms drive status

 */

 class CPropertyHandler : public CBase

 	{

 public:

 	virtual void HandleStatusChange(RProperty& aProperty) = 0;

 protected:

 	CPropertyHandler(TInt aDriveNo, CStateMachine& aSm);

 	virtual ~CPropertyHandler();

 protected:

 	TInt iDriveNo; 

 	CStateMachine& iStateMachine;

 	};

 class CMsDriveStatusHandler : public CPropertyHandler

 	{

 public:

 	static CMsDriveStatusHandler* NewLC(TInt aDriveNo, CStateMachine& aSm);

 	void HandleStatusChange(RProperty& aProperty);

 protected:

  	CMsDriveStatusHandler(TInt aDriveNo, CStateMachine& aSm);

 	};

 class CMsReadStatusHandler : public CPropertyHandler

 	{

 public:

 	static CMsReadStatusHandler* NewLC(TInt aDriveNo, CStateMachine& aSm);

 	void HandleStatusChange(RProperty& aProperty);

 private:

  	CMsReadStatusHandler(TInt aDriveNo, CStateMachine& aSm);

 	};

 class CMsWrittenStatusHandler : public CPropertyHandler

 	{

 public:

 	static CMsWrittenStatusHandler* NewLC(TInt aDriveNo, CStateMachine& aSm);

 	void HandleStatusChange(RProperty& aProperty);

 private:

  	CMsWrittenStatusHandler(TInt aDriveNo, CStateMachine& aSm);

 	};

#endif // __CPROPERTYWATCH_H__