// 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__