/*

* 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:    Layout that performs crossfade

 *

*/

//  Include Files

#include "shwcrossfadelayout.h"

#include <glxlog.h>

#include <glxtracer.h>

#include "shwconstants.h"

using namespace NShwSlideshow;

// -----------------------------------------------------------------------------

// Constructor

// -----------------------------------------------------------------------------

TShwCrossFadeLayout::TShwCrossFadeLayout()

	{

	TRACER("TShwCrossFadeLayout::TShwCrossFadeLayout");

	GLX_LOG_INFO("TShwCrossFadeLayout::TShwCrossFadeLayout");

	__DEBUG_ONLY( _iName = _L("TShwCrossfadeLayout") );

	// default values

	// style is linear

	iOpacity.SetStyle( EAlfTimedValueStyleLinear );

	}

// -----------------------------------------------------------------------------

// Destructor

// -----------------------------------------------------------------------------

TShwCrossFadeLayout::~TShwCrossFadeLayout()

	{

	TRACER("TShwCrossFadeLayout::~TShwCrossFadeLayout");

	GLX_LOG_INFO("TShwCrossFadeLayout::~TShwCrossFadeLayout");

	// Do nothing

	}

// -----------------------------------------------------------------------------

// Set

// -----------------------------------------------------------------------------

void TShwCrossFadeLayout::Set( TReal32 aOpacity, TInt aDuration )

	{

	TRACER("TShwCrossFadeLayout::Set");

	GLX_LOG_INFO("TShwCrossFadeLayout::Set");

	iOpacity.Set( aOpacity, aDuration );

	}

// -----------------------------------------------------------------------------

// Pause

// -----------------------------------------------------------------------------

void TShwCrossFadeLayout::Pause()

	{

	TRACER("TShwCrossFadeLayout::Pause");

	GLX_LOG_INFO("TShwCrossFadeLayout::Pause");

	iOpacity.Pause();

	}

// -----------------------------------------------------------------------------

// Resume

// -----------------------------------------------------------------------------

void TShwCrossFadeLayout::Resume()

	{

	TRACER("TShwCrossFadeLayout::Resume");

	GLX_LOG_INFO("TShwCrossFadeLayout::Resume");

	iOpacity.Resume();

	}

// -----------------------------------------------------------------------------

// DoSetLayoutValues

// -----------------------------------------------------------------------------

void TShwCrossFadeLayout::DoSetLayoutValues( TGlxLayoutInfo& aInfo )

	{

	TRACER("TShwCrossFadeLayout::DoSetLayoutValues");

	GLX_LOG_INFO("TShwCrossFadeLayout::DoSetLayoutValues");

	// get new opacity

	TReal32 opacity = iOpacity.Now();

	// ensure value is inside maximum and minimum opacity

    opacity = Min( opacity, KMaxOpacity );

    opacity = Max( opacity, KMinOpacity );

	// set value to the info

	//aInfo.iOpacity = opacity;

	}

// -----------------------------------------------------------------------------

// DoChanged

// -----------------------------------------------------------------------------

TBool TShwCrossFadeLayout::DoChanged() const

	{

	TRACER("TShwCrossFadeLayout::DoChanged");

	GLX_LOG_INFO("TShwCrossFadeLayout::DoChanged");

	return iOpacity.Changed();

	}

// -----------------------------------------------------------------------------

// DoClearChanged

// -----------------------------------------------------------------------------

void TShwCrossFadeLayout::DoClearChanged() 

	{

	TRACER("TShwCrossFadeLayout::DoClearChanged");

	GLX_LOG_INFO("TShwCrossFadeLayout::DoClearChanged");

	iOpacity.ClearChanged();

	}