/*

* Copyright (c) 2007 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:  Utility class to rotate bitmaps*

*/

#ifndef __CAMBMPROTATORAO_H

#define __CAMBMPROTATORAO_H

//  INCLUDES

#include <bitmaptransforms.h>

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  Utility class to help in the rotating of bitmaps (for Zoom Pane)

*

*  @since 3.0

*/

class CCamBmpRotatorAo : public CActive

    {

    private:

        // This structure stores the details of a rotation task.

        // Used only internally, the bitmap is *not* owned by this

        // class, and will be overwritten by the rotation operation.        

        class CRotateTask : public CBase

            {        

        public:

            // The source bitmap to be rotated (and overwritten)

            CFbsBitmap* iBitmap;

            // The angle to rotate the bitmap by

            CBitmapRotator::TRotationAngle iAngle;

            };

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CCamBmpRotatorAo* NewL();

        /**

        * Destructor.

        */

        virtual ~CCamBmpRotatorAo();

    public: // New functions        

        /**

        * Rotates the specified bitmap by the supplied angle.  

        * Note that the original bitmap will be overwritten

        * @since 3.0

        * @param aBitmap The bitmap to rotate

        * @param aRotation The angle to rotate the bitmap        

        */

        void AddToQueueL( CFbsBitmap* aBitmap, CBitmapRotator::TRotationAngle aRotation );        

        /**

        * Starts the next rotation task in the queue (if there is one)

        * @since 3.0

        */

        void StartNextRotate(); 

    public: // Functions from base classes

        /**

        * Called when a rotate operation has completed

        * @since 3.0        

        */

        void RunL();

        /**

        * Called to cancel an outstanding operation (eg when class is being destroyed)

        * @since 3.0       

        */

        void DoCancel();

    private:

        /**

        * C++ default constructor.

        * @since 3.0

        */

        CCamBmpRotatorAo();

        /**

        * By default Symbian 2nd phase constructor is private.

        * @since 3.0

        */

        void ConstructL();

    private:    // Data

        // List of outstanding rotation tasks to perform

        RPointerArray <CRotateTask> iQueue;    

        // ICL utility class that actually does the bitmap rotation

        CBitmapRotator* iRotator;         

    };

#endif      // __CAMBMPROTATORAO_H

// End of File