/*

* Copyright (c) 2003,2004 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:  Active object for calling Camera Application Engine methods 

*                indirectly from callbacks

*

*/

#ifndef CAECALLBACKACTIVE_H

#define CAECALLBACKACTIVE_H

// INCLUDES

#include <e32base.h>

#include <e32std.h>

// FORWARD DECLARATIONS

class CCaeEngineImp;

// CLASS DECLARATION

/**

* CCaeCallbackActive

* Active object for calling Camera Application Engine methods 

* indirectly from callbacks 

*/

NONSHARABLE_CLASS( CCaeCallbackActive ) : public CActive

    {

    public: // Constructors and destructor

        /**

        * Symbian OS two-phased constructor.

        * @since 2.1

        * @param aCamAppEngine Reference to CCaeEngineImp instance

        */

        static CCaeCallbackActive* NewLC( 

            CCaeEngineImp& aCamAppEngine );

        /**

        * Symbian OS two-phased constructor.

        * @since 2.1

        * @param aCamAppEngine Reference to CCaeEngineImp instance

        */

        static CCaeCallbackActive* NewL( 

            CCaeEngineImp& aCamAppEngine );

        /**

        * Destructor.

        */

        virtual ~CCaeCallbackActive();

    protected: // Constructors and destructor

        /**

        * Symbian OS 2nd phase constructor that can leave.

        */

        void ConstructL();

        /**

        * C++ constructor.

        * @since 2.1

        * @param aCamAppEngine Reference to CCaeEngineImp instance

        */

        CCaeCallbackActive( 

            CCaeEngineImp& aCamAppEngine );

    public: // New methods

        /**

        * Switches camera module power on.

        * @since 2.1

        * @return void

        */

        void PowerOn();

    public: // Methods from CActive (was protected)

        /**

        * Calls Camera Application Engine operation.

        * @return void

        */

        void RunL();

    protected: // Methods from CActive

        /**

        * Cancels request.

        * @return void

        */

        void DoCancel();

    private:

        // Timer to implement delayed operation calls.

        RTimer iTimer;

        // Reference to Camera Application Engine.

        CCaeEngineImp& iCamAppEngine;

        // Requests available.

        enum TRequest

            {

            /** Default */

            ERequestDefault,

            /** Switch camera power on */

            ERequestPowerOn,

            };

        // Request.

        TRequest iRequest;

    };

#endif // CAECALLBACKACTIVE_H

// End of File