/*

* 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:  PhoneUI Publish and Subscriber (Publish & Subscribe).

*

*/

#ifndef __CPHONEPUBLISHSUBSCRIBERAO_H

#define __CPHONEPUBLISHSUBSCRIBERAO_H

// INCLUDES

#include <e32base.h>

#include <e32property.h>

#include "mphonepubsubobserver.h"

// CLASS DECLARATION

/**

*  This class observes property variable changes.

*

*  @lib   Services.dll

*/

class CPhonePublishSubscriberAO : public CActive

    {

    public:

        /**

        * Two-phased constructor.

        */         

        static CPhonePublishSubscriberAO* NewL( 

            MPhonePubSubObserver* aPubSubObserver, 

            const TUid& aCategory, 

            const TUint aKey );

        /**

        * Destructor.

        */

        ~CPhonePublishSubscriberAO();

        /**

        * Subscribe to an RProperty

        * @param none

        * @return none

        */

        void Subscribe();

    public: // from CActive

        /**

        * @param none

        * @return none

        */    

        void RunL();

        /**

        * @param aError the error returned

        * @return error

        */

        TInt RunError( TInt aError );

        /**

        * @param none

        * @return none

        */    

        void DoCancel();

    public: // new methods

        /**

        * Return property category that is subscribed to

        * @param None

        */

        const TUid Category() const;

        /**

        * Return property key that is subscribed to

        * @param None

        */

        TUint Key() const;

    private:

        /**

        * C++ constructor.

        */

        CPhonePublishSubscriberAO( 

            MPhonePubSubObserver* aPubSubObserver, 

            const TUid& aCategory, 

            const TUint aKey );

    private:

        MPhonePubSubObserver*   iPubSubObserver; // NOT OWN

        RProperty               iProperty; 

        TUid                    iCategory;

        TUint                   iKey;

    };

#endif // __CPHONEPUBLISHSUBSCRIBERAO_H

// End of File