/*

* Copyright (c) 2007-2008 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:    The crossfade effect

 *

*/

#ifndef __SHWCROSSFADEEFFECT_H__

#define __SHWCROSSFADEEFFECT_H__

// INCLUDES

#include <e32std.h>

#include <e32base.h>

#include <alf/alfvisual.h>

#include <alf/alfenv.h>

#include "shweffect.h"

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

 * CShwCrossFadeEffect, the crossfade effect.

 * Shows images in full screen in view mode and performs smooth crossfade in transition.

 *

 * @lib shwslideshowengine.lib

 * @internal reviewed 07/06/2007 by Loughlin

 */

NONSHARABLE_CLASS( CShwCrossFadeEffect )

	: public CBase, public MShwEffect

	{

	public:

		/**

		 * Contructor.

		 */

		static CShwCrossFadeEffect* NewLC();

		/**

		 * Destructor.

		 */

		~CShwCrossFadeEffect();

	private:

		/**

		 * C++ contructor.

		 */

		CShwCrossFadeEffect();

	public: // from MShwEffect

		/// @ref MShwEffect::CloneLC

		MShwEffect* CloneLC();

		/// @ref MShwEffect::InitializeL

		void InitializeL( 

    		CAlfEnv* aHuiEnv, MGlxVisualList* aVisualList,

		    MGlxMediaList* aMediaList, TSize aScreenSize );

		/// @ref MShwEffect::PrepareViewL

		TSize PrepareViewL( CAlfVisual* aVisual, TSize aImageSize );

		/// @ref MShwEffect::EnterViewL

		MGlxLayout* EnterViewL( 

			CAlfVisual* aVisual, TInt aDuration, TInt aFadeInDuration );

		/// @ref MShwEffect::ExitView

		void ExitView( CAlfVisual* aVisual );

		/// @ref MShwEffect::EnterTransitionL

		MGlxLayout* EnterTransitionL( CAlfVisual* aVisual, TInt aDuration );

		/// @ref MShwEffect::ExitTransition

		void ExitTransition( CAlfVisual* aVisual );

		/// @ref MShwEffect::PauseL

		void PauseL();

		/// @ref MShwEffect::Resume

		void Resume();

        /// @ref MShwEffect:EffectInfo

        TShwEffectInfo EffectInfo();

	private:

		/// Own: the implementation

		class CShwCrossFadeEffectImpl;

		CShwCrossFadeEffectImpl* iImpl;

	};

#endif // __SHWCROSSFADEEFFECT_H__