/*

* Copyright (c) 2002-2006 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:  

*       CMmsViewerChangeSlideOperation, asynchronous operation for object saving

*

*/

#ifndef __MMSVIEWERCHANGESLIDEOPERATION_H

#define __MMSVIEWERCHANGESLIDEOPERATION_H

// INCLUDES

#include <e32base.h>

#include <e32std.h>

#include <unislideloader.h>

#include "UniMmsViewerDocument.h"

#include "MmsViewerOperation.h"

// CONSTANTS

// MACROS

// FORWARD DECLARATIONS

class CMmsViewerHeader;

class CMsgEditorView;

// DATA TYPES

// FUNCTION PROTOTYPES

// CLASS DECLARATION

/**

* CMmsViewerChangeSlideOperation, Storage for single attachment in presentation. 

*

* @since 2.0

*/

class CMmsViewerChangeSlideOperation : public CMmsViewerOperation,

                                       public MUniSlideLoaderObserver

    {

    public:  // New methods

        /**

        * Factory method that creates this object.

        *

        * @since    3.0

        */

        CMmsViewerChangeSlideOperation(

            MMmsViewerOperationObserver& aOperationObserver,

            CMmsViewerDocument& aDocument,

            CMmsViewerHeader& aHeader,

            CUniSlideLoader& aSlideLoader,

            CMsgEditorView& aView,

            RFs& aFs );

        /**

        * Destructor

        *

        * @since    3.0

        */

        virtual ~CMmsViewerChangeSlideOperation();

        /**

        *

        */

        void ChangeSlide( TInt aNextNum );

        /** 

        * Reloads control

        */

        void ReLoadControlL( CMsgMediaControl* aControl, CUniObject* aObject );

    private:

        /**

        * From MMms/UniSlideLoaderObserver

        */

        void SlideLoadReady( TInt aError );

        /**

        * From CActive

        */

        void DoCancel();

        /**

        * From CActive

        */

        void RunL();

        /**

        * From CActive

        */

        TInt RunError( TInt aError );

        /**

        *

        */

        void DoChangeSlideStepL();

        /**

        *

        */

        void DoResetViewL();

        /**

        *

        */

        void DoLoadL();

        /**

        *

        */

        void DoFinalizeL();

    protected: 

        /**

        * 2nd phase constructor.

        *

        * @since    2.0

        */

        void ConstructL();

    protected: // data

        enum TMmsViewerChangeSlideState

            {

            EMmsViewerChangeSlideResetView,

            EMmsViewerChangeSlideLoad,

            EMmsViewerChangeSlideFinalize,

            EMmsViewerChangeSlideEnd

            };

        CMmsViewerHeader&           iHeader;

        CUniSlideLoader&            iSlideLoader;

        CMsgEditorView&             iView;

        TInt                        iNextNum;

        TMmsViewerChangeSlideState  iChangeSlideState;

    };

#endif // __MMSVIEWERCHANGESLIDEOPERATION_H