--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/engine/effectsrc/shwcrossfadeeffect.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,296 @@
+/*
+* 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:   Header file for crossfade effect
+ *
+*/
+
+
+
+
+//  Include Files
+#include "shwcrossfadeeffect.h"
+
+#include <glxsetvaluelayout.h>
+#include <glxlog.h>
+#include <glxtracer.h>
+
+#include "shwcrossfadelayout.h"
+#include "shwresourceutility.h"
+#include "shwconstants.h"
+
+using namespace NShwSlideshow;
+	
+/**
+ * CShwCrossFadeEffectImpl
+ * Crossfade dependencies
+ * This class makes our clients indepandant of the effect implementation
+ * This gives greater flexibitily in testing as the test suites can just
+ * re-implement all the methods in the real class interface without the 
+ * need to stub all our dependencies. 
+ * If for example TShwCrossFadeLayout was a direct member of
+ * CShwCrossFadeEffect class, all the clients would need to have access 
+ * to TShwCrossFadeLayout constructor and destructor and the test suite
+ * would need to either create a stub implementation for it or include
+ * the real class in the test (and all its dependencies).
+ *
+ * There is however no point of duplicating the whole CShwCrossFadeEffect
+ * interface as it would mean double maintenance
+ * so we use the iImpl pointer when referencing the class members
+ */
+NONSHARABLE_CLASS( CShwCrossFadeEffect::CShwCrossFadeEffectImpl )
+	: public CBase
+	{
+	public:
+		
+		/**
+		 * Constructor
+		 */
+		CShwCrossFadeEffectImpl();
+
+		/**
+		 * Destructor
+		 */
+		~CShwCrossFadeEffectImpl();
+
+	public:
+
+        /// Own: the size of the screen
+        TSize iScreenSize;
+
+		/// Own: the layout objects
+		TGlxSetValueLayout iSizeLayout;
+		TShwCrossFadeLayout iOpacityLayout;
+
+		/// Own: the effect info.
+		TShwEffectInfo iEffectInfo;
+		
+		/// Own: the effect's name
+		HBufC*	iEffectName;
+		
+	};
+
+// -----------------------------------------------------------------------------
+// C++ Constructor. Save a few bits of rom with inlining
+// -----------------------------------------------------------------------------
+inline CShwCrossFadeEffect::CShwCrossFadeEffectImpl::CShwCrossFadeEffectImpl()
+//	: iSizeLayout( TGlxLayoutInfo::ESize )
+	{
+	TRACER("CShwCrossFadeEffect::CShwCrossFadeEffectImpl::CShwCrossFadeEffectImpl()");
+	GLX_LOG_INFO("CShwCrossFadeEffect::CShwCrossFadeEffectImpl::CShwCrossFadeEffectImpl()");
+	// set layout chains, opacity -> size
+	iOpacityLayout.SetNext( &iSizeLayout );
+	iSizeLayout.SetNext( NULL );
+
+	// define initial values
+	iOpacityLayout.Set( KMinOpacity );	// initial value 0%
+	}
+
+// -----------------------------------------------------------------------------
+// Destructor. Save a few bits of rom with inlining
+// -----------------------------------------------------------------------------
+inline CShwCrossFadeEffect::CShwCrossFadeEffectImpl::~CShwCrossFadeEffectImpl()
+	{
+	TRACER("CShwCrossFadeEffect::CShwCrossFadeEffectImpl::~CShwCrossFadeEffectImpl()");
+	GLX_LOG_INFO("CShwCrossFadeEffect::CShwCrossFadeEffectImpl::~CShwCrossFadeEffectImpl()");
+	delete iEffectName;
+	}
+
+// -----------------------------------------------------------------------------
+// C++ Constructor. Save a few bits of rom with inlining
+// -----------------------------------------------------------------------------
+inline CShwCrossFadeEffect::CShwCrossFadeEffect()
+	{
+	}
+
+// -----------------------------------------------------------------------------
+// NewLC. Static construction
+// -----------------------------------------------------------------------------
+CShwCrossFadeEffect* CShwCrossFadeEffect::NewLC()
+	{
+	TRACER("CShwCrossFadeEffect::NewLC");
+	GLX_LOG_INFO("CShwCrossFadeEffect::NewLC");
+	CShwCrossFadeEffect* self = new (ELeave) CShwCrossFadeEffect;
+	CleanupStack::PushL( self );
+
+	// create implementation
+	self->iImpl = new( ELeave ) CShwCrossFadeEffectImpl;
+
+    // Note that only one name is defined for the cross fade so can only
+    // distinguish between normal and zoom effects via the uid
+	self->iImpl->iEffectName = 
+		ShwResourceUtility::LocalisedNameL( R_SHW_EFFECT_CROSS_FADE );
+	if( !self->iImpl->iEffectName )
+		{
+		// Have to use a non-localised version
+		self->iImpl->iEffectInfo.iName = KEffectNameCrossFade;
+		}
+	else
+		{
+		// set the localised version
+		self->iImpl->iEffectInfo.iName = *self->iImpl->iEffectName;
+		}
+
+    // info - uid
+	self->iImpl->iEffectInfo.iId.iPluginUid = KDefaultEffectPluginUid;
+	self->iImpl->iEffectInfo.iId.iIndex 	= KEffectUidXFadeNormal;
+
+	return self;
+	}
+
+// -----------------------------------------------------------------------------
+// Destructor.
+// -----------------------------------------------------------------------------
+CShwCrossFadeEffect::~CShwCrossFadeEffect()
+	{
+	TRACER("CShwCrossFadeEffect::~CShwCrossFadeEffect");
+	GLX_LOG_INFO("CShwCrossFadeEffect::~CShwCrossFadeEffect");
+	delete iImpl;
+	}
+
+// -----------------------------------------------------------------------------
+// CloneLC
+// -----------------------------------------------------------------------------
+MShwEffect* CShwCrossFadeEffect::CloneLC()
+	{
+	TRACER("CShwCrossFadeEffect::CloneLC");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::CloneLC" );
+	// create a copy of the effect
+	CShwCrossFadeEffect* copy = CShwCrossFadeEffect::NewLC();
+	// transfer the member variables, only size has relevant value
+	/*copy->iImpl->iSizeLayout.SetValue( 
+		iImpl->iSizeLayout.TimedPoint().iX.Now(), 
+		iImpl->iSizeLayout.TimedPoint().iY.Now(),
+		0 );*/
+	// copy the screen size
+	copy->iImpl->iScreenSize = iImpl->iScreenSize;
+	return copy;
+	}
+
+// -----------------------------------------------------------------------------
+// InitializeL
+// -----------------------------------------------------------------------------
+void CShwCrossFadeEffect::InitializeL( 
+	CAlfEnv* /*aHuiEnv*/, MGlxVisualList* /*aVisualList*/,
+    MGlxMediaList* /*aMediaList*/, TSize aScreenSize )
+	{
+	TRACER("CShwCrossFadeEffect::InitializeL");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::InitializeL" );
+	// set the screen size
+	iImpl->iScreenSize = aScreenSize;
+	// set the layout full screen (slideshow is always run on landscape)
+//	iImpl->iSizeLayout.SetValue( aScreenSize.iWidth, aScreenSize.iHeight, 0 );
+	}
+
+// -----------------------------------------------------------------------------
+// PrepareViewL
+// -----------------------------------------------------------------------------
+TSize CShwCrossFadeEffect::PrepareViewL( 
+	CAlfVisual* /*aVisual*/, TSize /*aImageSize*/ )
+	{
+	TRACER("CShwCrossFadeEffect::PrepareViewL");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::PrepareViewL" );
+	// visual list takes care of fitting the image and maintains aspect ratio
+	// return the screen size as the thumbnail size
+	return iImpl->iScreenSize;
+	}
+
+// -----------------------------------------------------------------------------
+// EnterViewL.
+// -----------------------------------------------------------------------------
+MGlxLayout* CShwCrossFadeEffect::EnterViewL(
+	CAlfVisual* aVisual/**/, TInt /*aDuration*/, TInt aFadeInDuration )
+	{
+	TRACER("CShwCrossFadeEffect::EnterViewL");
+	GLX_LOG_INFO1(
+		"CShwCrossFadeEffect::EnterViewL( %d )", aFadeInDuration );
+	TAlfTimedValue initialValue(0.0,0);
+	aVisual->SetOpacity(initialValue);
+	TAlfTimedValue tranition(1.0,aFadeInDuration);
+	tranition.SetStyle(EAlfTimedValueStyleLinear);
+	aVisual->SetOpacity(tranition);
+	// set value, 0% -> 100%
+	//iImpl->iOpacityLayout.Set( KMinOpacity );
+	//iImpl->iOpacityLayout.Set( KMaxOpacity, aFadeInDuration );
+	return &iImpl->iOpacityLayout;
+	}
+
+// -----------------------------------------------------------------------------
+// ExitView.
+// -----------------------------------------------------------------------------
+void CShwCrossFadeEffect::ExitView( CAlfVisual* /*aVisual*/ )
+	{
+	TRACER("CShwCrossFadeEffect::ExitView");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::ExitView" );
+	}
+
+// -----------------------------------------------------------------------------
+// EnterTransitionL.
+// -----------------------------------------------------------------------------
+MGlxLayout* CShwCrossFadeEffect::EnterTransitionL(
+	CAlfVisual* /**/aVisual, TInt aDuration )
+	{
+	TRACER("CShwCrossFadeEffect::EnterTransitionL");
+	GLX_LOG_INFO1( "CShwCrossFadeEffect::EnterTransitionL( %d )", aDuration );
+
+	// set value, drop from 100% to 0%
+	//iImpl->iOpacityLayout.Set( KMaxOpacity );
+    //iImpl->iOpacityLayout.Set( KMinOpacity, aDuration );
+	TAlfTimedValue tranition(0.0,aDuration);
+	tranition.SetStyle(EAlfTimedValueStyleLinear);
+	aVisual->SetOpacity(tranition);
+	return &iImpl->iOpacityLayout;
+	}
+
+// -----------------------------------------------------------------------------
+// ExitTransition.
+// -----------------------------------------------------------------------------
+void CShwCrossFadeEffect::ExitTransition( CAlfVisual* /*aVisual*/ )
+	{
+	TRACER("CShwCrossFadeEffect::ExitTransition");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::ExitTransition" );
+	}
+
+// -----------------------------------------------------------------------------
+// PauseL.
+// -----------------------------------------------------------------------------
+void CShwCrossFadeEffect::PauseL()
+	{
+	TRACER("CShwCrossFadeEffect::PauseL");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::PauseL()");
+
+	// pause the opacity, size does not change so no need to pause
+	iImpl->iOpacityLayout.Pause();
+	}
+
+// -----------------------------------------------------------------------------
+// Resume.
+// -----------------------------------------------------------------------------
+void CShwCrossFadeEffect::Resume()
+	{
+	TRACER("CShwCrossFadeEffect::Resume");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::Resume()");
+
+	// resume the opacity layout, size does not change so no need to resume
+	iImpl->iOpacityLayout.Resume();
+	}
+
+// -----------------------------------------------------------------------------
+// EffectInfo.
+// -----------------------------------------------------------------------------
+TShwEffectInfo CShwCrossFadeEffect::EffectInfo()
+	{
+	TRACER("CShwCrossFadeEffect::EffectInfo");
+	GLX_LOG_INFO( "CShwCrossFadeEffect::EffectInfo()");
+	return iImpl->iEffectInfo;
+	}