/*

* Copyright (c) 2006 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:  CVtUiFeatureBase implementation.

*

*/

#ifndef C_VTUIFEATUREBASE_H

#define C_VTUIFEATUREBASE_H

//  INCLUDES

#include <e32base.h>

#include "mvtuifeature.h"

// CLASS DECLARATION

class CVtUiAppUi;

class CVtUiFeatureManager;

/**

*   Base class for Video Telephone application features.

*

*  @since S60 3.2

*/

class CVtUiFeatureBase : public CBase, public MVtUiFeature

    {

    public: // public methods

        /**

        * C++ destructor.

        */

        ~CVtUiFeatureBase();

    public: // from MVtUiFeature

        /** @see MVtUiFeature */

        virtual void StartL();

        /** @see MVtUiFeature */

        virtual void Stop() = 0;

        /** @see MVtUiFeature */

        virtual void InitFeatureL() = 0;

        /** @see MVtUiFeature */

        TVtUiFeatureState State() const;

        /** @see MVtUiFeature */

        TVtUiFeatureId Id() const;

    protected:

        /**

        * C++ constructor

        *

        */

        CVtUiFeatureBase( TVtUiFeatureId aId,

            CVtUiFeatureManager& aFeatureManager );

        /**

        * BaseConstructL

        * For child class to use.

        * Calls constructL. 

        */

        void BaseConstructL();

        /**

        * Callback function that inits the features.

        * @param aAny pointer to an instance of the class.

        * @return always KErrNone.

        */

        static TInt DoInitFeaturesL( TAny* aAny );

    protected: // data

        // Feature's unique Id

        const TVtUiFeatureId iId;

        // Reference to featuremanager

        CVtUiFeatureManager& iFeatureManager;

        // Features current state

        MVtUiFeature::TVtUiFeatureState iFeatureState;

        // Owned asynch callback.

        CAsyncCallBack* iAsyncCallback;

    };

#endif // C_VTUIFEATUREBASE_H