/*

* Copyright (c) 2005 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:  

*

*/

#ifndef MUSPROPERTYWATCH_H

#define MUSPROPERTYWATCH_H

#include "musunittesting.h"

#include <e32base.h>

#include <e32property.h>

class MMusPropertyObserver;

class CMusPropertyWatch : public CActive

    {

    MUS_UNITTEST( UT_CMusPropertyWatch )

public: // constructors and destructor

    /**

     * Two-phased constructor. Leaves on failure.

     * @return The constructed CMusPropertyWatch object.

     */

    static CMusPropertyWatch* NewL( MMusPropertyObserver& aObserver, 

                                    TUid aCategory, 

                                    const TInt aPropertyName );

    /**

     * Destructor.

     */

    ~CMusPropertyWatch();

private:

    /**

     * C++ constructor.

     */

    CMusPropertyWatch( MMusPropertyObserver& aObserver, 

                       TUid aCategory, 

                       const TInt aPropertyName );

    /**

     * Symbian 2nd-phase constructor.

     * @leave If return value of RProperty::Attach != KErrNone, e.q. KErrNoMemory

     *        or one of the system wide error codes if RunL() leaves

     */

    void ConstructL();

public: // new functions

    /**

    * Reads a P&S integer value from the category KCategoryUid

    * @pre P&S value has to be defined.

    * @leave One of the system wide error codes, if RProperty::Get()

    *        returns an error value.

    * @param aKey Name of the P&S Key, which value should be read

	* @returns The integer value of the P&S Key.

    */

    static TInt ReadIntPropertyL( TUint aKey );

    /**

    * Reads a P&S descriptor value from the category KCategoryUid

    * @pre P&S value has to be defined.

    * @leave One of the system wide error codes, if RProperty::Get()

    *        returns an error value or if descriptor AllocL() leaves.

    * @param aKey Name of the P&S Key, which value should be read

	* @returns The descriptor value of the P&S Key.

    *          Ownership is transferred

    */

    static HBufC* ReadDescPropertyL( TUint aKey );

private: // functions from base class CActive

    /**

     *

     */

    void DoCancel();

    /**

    * Reads a P&S integer value from the category KCategoryUid

    * and starts to monitor changes in the property value.

    * Calls observer function for read property values.

    * @pre P&S value has to be defined as an integer.

    * @leave One of the system wide error codes, if RProperty::Get()

    *        returns an error value.

    */

    void RunL();

    /**

     *

     */

	TInt RunError(TInt aError);

private:    // Data

	RProperty iProperty;

	TUid iPropertyCategory;

    TUint iPropertyKey;

    MMusPropertyObserver& iObserver;

    };

#endif // MUSPROPERTYWATCH_H

// end of file