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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: The zoom and pan effect
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*
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*/
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// Include Files
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#include "shwzoomandpaneffect.h"
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#include <glxsetvaluelayout.h>
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#include <alf/alfvisual.h>
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#include <alf/alfcurvepath.h>
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#include <alf/alftimedvalue.h>
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#include "shwresourceutility.h"
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#include "shwzoomandpanlayout.h"
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#include "shwcurvefactory.h"
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#include "shwconstants.h"
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#include "shwslideshowenginepanic.h"
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#include "shwcrossfadelayout.h"
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#include "shwtimer.h"
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#include "shwcallback.h"
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#include "shwgeometryutilities.h"
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#include <glxlog.h>
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using namespace NShwSlideshow;
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/**
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* CShwZoomAndPanEffectImpl
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* Zoom and pan dependencies
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* This class makes our clients indepandant of the effect implementation
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* This gives greater flexibitily in testing as the test suites can just
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* re-implement all the methods in the real class interface without the
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* need to stub all our real dependencies.
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* If for example TShwCrossFadeLayout was a direct member of
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* CShwZoomAndPanEffect class, all the clients would need to have access
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* to TShwCrossFadeLayout constructor and destructor and the test suite
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* would need to either create a stub implementation for it or include
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* the real class in the test (and all its dependencies)
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*
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* There is however no point of duplicating the whole CShwZoomAndPanEffect
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* interface as it would mean double maintenance
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* so we use the iImpl pointer when referencing the class members
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*/
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NONSHARABLE_CLASS( CShwZoomAndPanEffect::CShwZoomAndPanEffectImpl )
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: public CBase
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{
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public:
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/**
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* Constructor
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*/
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inline CShwZoomAndPanEffectImpl();
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/**
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* Destructor
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*/
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inline ~CShwZoomAndPanEffectImpl();
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/**
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* 2nd phase constructor
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*/
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inline void ConstructL();
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public: // Data
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/// Own: the size of the screen
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TSize iScreenSize;
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/// Own: the maximum thumbnail size
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TSize iMaxThumbnailSize;
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/// Own: the opacity layout
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TShwCrossFadeLayout iOpacityLayout;
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/// Own: the zoom and pan layout
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TShwZoomAndPanLayout iZoomAndPanLayout;
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/// Own: the pan curve
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CAlfCurvePath* iCurve;
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/// Own: Zoom and pan loop timer
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CShwTimer* iLoopTimer;
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/// Own: flag that defines if the image is large enough for zoom&pan
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TBool iShouldZoom;
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/// Own: Count to change the zoom direction
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TInt iCount;
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/// Own: the effect's info.
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TShwEffectInfo iEffectInfo;
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};
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// -----------------------------------------------------------------------------
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// C++ Constructor. Save a few bits of rom with inlining
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// -----------------------------------------------------------------------------
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inline CShwZoomAndPanEffect::CShwZoomAndPanEffectImpl::CShwZoomAndPanEffectImpl()
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{
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// CBase clears the values
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// set layout chain
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iOpacityLayout.SetNext( &iZoomAndPanLayout );
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}
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// -----------------------------------------------------------------------------
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// Destructor. Save a few bits of rom with inlining
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// -----------------------------------------------------------------------------
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inline CShwZoomAndPanEffect::CShwZoomAndPanEffectImpl::~CShwZoomAndPanEffectImpl()
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{
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delete iCurve;
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delete iLoopTimer;
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}
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// -----------------------------------------------------------------------------
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// 2nd phase constructor for the implementation
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// -----------------------------------------------------------------------------
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inline void CShwZoomAndPanEffect::CShwZoomAndPanEffectImpl::ConstructL()
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{
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// timer for zoom and pan looping
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iLoopTimer = CShwTimer::NewL( CActive::EPriorityStandard );
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// load string for effect name, no need to cleanup stack
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// as no leaves between here and delete
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HBufC* effectName =
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ShwResourceUtility::LocalisedNameL( R_SHW_EFFECT_ZOOM_AND_PAN );
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if( !effectName )
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{
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// have to use a non-localised version
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iEffectInfo.iName = KEffectNameZoomAndPan;
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}
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else
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{
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// set the localised version
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iEffectInfo.iName = *effectName;
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}
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// info - uid
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iEffectInfo.iId.iPluginUid = KDefaultEffectPluginUid;
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iEffectInfo.iId.iIndex = KEffectUidZoomAndPan;
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// delete the local string
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delete effectName;
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}
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// -----------------------------------------------------------------------------
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// C++ Constructor. Save a few bits of rom with inlining
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// -----------------------------------------------------------------------------
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inline CShwZoomAndPanEffect::CShwZoomAndPanEffect()
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{
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}
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// -----------------------------------------------------------------------------
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// NewLC. Static construction
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// -----------------------------------------------------------------------------
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CShwZoomAndPanEffect* CShwZoomAndPanEffect::NewLC()
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{
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CShwZoomAndPanEffect* self = new (ELeave) CShwZoomAndPanEffect;
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CleanupStack::PushL( self );
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// create the implementation class
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self->iImpl = new( ELeave ) CShwZoomAndPanEffectImpl;
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// do the second phase, if it leaves impl will be deleted
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self->iImpl->ConstructL();
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return self;
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}
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// -----------------------------------------------------------------------------
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// Destructor
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// -----------------------------------------------------------------------------
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CShwZoomAndPanEffect::~CShwZoomAndPanEffect()
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{
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delete iImpl;
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}
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// -----------------------------------------------------------------------------
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// CloneLC
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// -----------------------------------------------------------------------------
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MShwEffect* CShwZoomAndPanEffect::CloneLC()
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::CloneLC" );
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// create a copy
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CShwZoomAndPanEffect* copy = CShwZoomAndPanEffect::NewLC();
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// transfer the member variables, only screen
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// size has relevant value this point
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copy->iImpl->iScreenSize = iImpl->iScreenSize;
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// set count to be one greater so it has a different zoom direction
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copy->iImpl->iCount = iImpl->iCount + 1;
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// copy the max thumbnail size
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copy->iImpl->iMaxThumbnailSize = iImpl->iMaxThumbnailSize;
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// return the clone
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return copy;
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}
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// -----------------------------------------------------------------------------
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// InitializeL
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// -----------------------------------------------------------------------------
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void CShwZoomAndPanEffect::InitializeL(
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CAlfEnv* /*aHuiEnv*/, MGlxVisualList* /*aVisualList*/,
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MGlxMediaList* /*aMediaList*/, TSize aScreenSize )
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::SetHuiEnv" );
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// set the screen size
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iImpl->iScreenSize = aScreenSize;
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// zoom and pan wants at least triple the screen size thumbnails
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TInt width = iImpl->iScreenSize.iWidth;
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TInt height = iImpl->iScreenSize.iHeight;
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// set the maximum thumbnail size, we need to optimize memory usage
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// so dont load more pixels than KMaxThumbnailSize x Screen size thumbnail
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iImpl->iMaxThumbnailSize.iWidth = width * KMaxThumbnailSize;
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iImpl->iMaxThumbnailSize.iHeight = height * KMaxThumbnailSize;
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}
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// -----------------------------------------------------------------------------
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// PrepareViewL
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// -----------------------------------------------------------------------------
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TSize CShwZoomAndPanEffect::PrepareViewL(
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CAlfVisual* /*aVisual*/, TSize aImageSize )
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::PrepareViewL()" );
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// use the namespace for coord utilities
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using namespace NShwGeometryUtilities;
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TSize originalImageSize = aImageSize;
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// take a local copy of the size
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TSize thumbnailSize = aImageSize;
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// check that size was really found
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if( ( aImageSize.iWidth == KErrNotFound )||
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( aImageSize.iHeight == KErrNotFound ) )
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{
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// size attribute not available so use screen size
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thumbnailSize = iImpl->iScreenSize;
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// need to also adjust aImageSize as its used further to make sure
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// we dont load too big thumbnail; in this case we load screen size
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originalImageSize = iImpl->iScreenSize;
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}
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// calculate zoom first as after that we know the real panning
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// optimist assumes we can zoom every image
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iImpl->iShouldZoom = ETrue;
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// set the sizes for layout chain, return value is the zoom factor
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TReal32 zoomFactor =
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iImpl->iZoomAndPanLayout.SetSizes(
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iImpl->iScreenSize, thumbnailSize, iImpl->iMaxThumbnailSize );
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// if the zoomfactor is smaller than minimal desired, dont zoom&pan
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if( zoomFactor < KMinZoomAndPanFactor )
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{
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iImpl->iShouldZoom = EFalse;
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}
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// ask for the maximum size from the layout
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TSize maxSize = iImpl->iZoomAndPanLayout.MaximumSize();
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// make sure we don't load the image larger than maximum size
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thumbnailSize = maxSize;
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// thumbnail is never loaded larger than image size,
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// either in image size or smaller... zooming may go past image size though
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FitInsideBox(
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thumbnailSize.iWidth, thumbnailSize.iHeight,
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originalImageSize.iWidth, originalImageSize.iHeight );
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// calculate the area for the curve using the maximum size
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// it must not cause the panning to get outside screen so need to calculate
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// the delta box. We dont allow negative pan,
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// however we need to support panning only in either direction.
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// Note that curve will have negative values, its just curve -defining
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// box that we make positive as negative value means too small image to pan
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TInt curveWidth = Max(
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( maxSize.iWidth - iImpl->iScreenSize.iWidth ) / 2,
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0 );
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TInt curveHeight = Max(
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( maxSize.iHeight - iImpl->iScreenSize.iHeight ) / 2,
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0 );
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// delete old curve and set to NULL to prevent double delete
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delete iImpl->iCurve;
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iImpl->iCurve = NULL;
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// if both are zero, dont bother creating curve
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if( ( curveWidth > 0 ) || ( curveHeight > 0 ) )
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{
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// create size
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TSize curvearea( curveWidth, curveHeight );
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// construct new curve inside TRAP, if it fails we just dont pan
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TRAP_IGNORE(
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{
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CAlfCurvePath* curve =
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NShwCurveFactory::CreateEllipsisL(
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curvearea, KZoomAndPanCurveLength );
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// set new curve
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iImpl->iCurve = curve;
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} );
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}
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// return the calculated thumbnail size
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return thumbnailSize;
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}
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// -----------------------------------------------------------------------------
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// EnterViewL
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// -----------------------------------------------------------------------------
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MGlxLayout* CShwZoomAndPanEffect::EnterViewL(
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CAlfVisual* /*aVisual*/, TInt aDuration, TInt aFadeInDuration )
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{
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GLX_LOG_INFO1(
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"CShwZoomAndPanEffect::EnterViewL( %d )", aDuration );
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// calculate zoom&pan length
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// minimum length is the view duration and transition duration * 2
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// this is because there is transition, view and transition while
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// this visual is visible (at least partially)
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TInt zoom_and_pan_dur = aDuration + aFadeInDuration * 2;
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// set value, 0% -> 100%
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iImpl->iOpacityLayout.Set( KMinOpacity );
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iImpl->iOpacityLayout.Set( KMaxOpacity, aFadeInDuration );
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// check if the image was large enough for zooming
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if( iImpl->iShouldZoom )
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{
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// start with zoom in
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TShwZoomAndPanLayout::TZoomDirection zoomdir =
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TShwZoomAndPanLayout::EZoomIn;
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if( iImpl->iCount % 2 )
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{
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zoomdir = TShwZoomAndPanLayout::EZoomOut;
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}
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// start zoom
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// minimum length is the view duration and transition duration * 2
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// this is because there is transition, view and transition while
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// this visual is visible (at least partially)
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iImpl->iZoomAndPanLayout.StartZoom(
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zoomdir, zoom_and_pan_dur );
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// need to start a timer to invert the zoom in case image load
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// takes longer than view mode lasts
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iImpl->iLoopTimer->Start(
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zoom_and_pan_dur,
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zoom_and_pan_dur,
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TShwCallBack<
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TShwZoomAndPanLayout,
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&TShwZoomAndPanLayout::InvertZoom >(
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&iImpl->iZoomAndPanLayout ) );
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}
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else
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{
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// reset the size to minimum
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iImpl->iZoomAndPanLayout.ResetSizeToMinimum();
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// cancel loop timer in case it is running, if not then
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// this is a no-op
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iImpl->iLoopTimer->Cancel();
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}
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// return layout chain
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return &iImpl->iOpacityLayout;
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}
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// -----------------------------------------------------------------------------
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// ExitView
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// -----------------------------------------------------------------------------
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void CShwZoomAndPanEffect::ExitView( CAlfVisual* /*aVisual*/ )
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::ExitView" );
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// Cancel the loop timer as we are already going to the
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// next effect and visual
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iImpl->iLoopTimer->Cancel();
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}
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// -----------------------------------------------------------------------------
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// EnterTransitionL
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// -----------------------------------------------------------------------------
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MGlxLayout* CShwZoomAndPanEffect::EnterTransitionL(
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CAlfVisual* /*aVisual*/, TInt aDuration )
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{
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GLX_LOG_INFO1( "CShwZoomAndPanEffect::EnterTransitionL( %d )", aDuration );
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// increase count, so every other time we can zoom in and out but only if we
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// really got to transition
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iImpl->iCount++;
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// set value, drop from 100% to 0%
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iImpl->iOpacityLayout.Set( KMaxOpacity );
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iImpl->iOpacityLayout.Set( KMinOpacity, aDuration );
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return &iImpl->iOpacityLayout;
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}
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// -----------------------------------------------------------------------------
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// ExitTransition
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// -----------------------------------------------------------------------------
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void CShwZoomAndPanEffect::ExitTransition( CAlfVisual* /*aVisual*/ )
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::ExitTransition" );
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}
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// -----------------------------------------------------------------------------
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// PauseL
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// -----------------------------------------------------------------------------
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void CShwZoomAndPanEffect::PauseL()
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{
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GLX_LOG_INFO( "CShwZoomAndPanEffect::PauseL" );
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// need to pause the layouts, start with opacity
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iImpl->iOpacityLayout.Pause();
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// freeze zoom and pan layout
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iImpl->iZoomAndPanLayout.Pause();
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// pause loop timer, it is safe to pause the timer even if its not active
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iImpl->iLoopTimer->Pause();
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}
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// -----------------------------------------------------------------------------
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419 |
// Resume
|
|
420 |
// -----------------------------------------------------------------------------
|
|
421 |
void CShwZoomAndPanEffect::Resume()
|
|
422 |
{
|
|
423 |
GLX_LOG_INFO( "CShwZoomAndPanEffect::Resume" );
|
|
424 |
// resume layouts
|
|
425 |
// start with opacity
|
|
426 |
iImpl->iOpacityLayout.Resume();
|
|
427 |
// resume zoom and pan layout
|
|
428 |
iImpl->iZoomAndPanLayout.Resume();
|
|
429 |
// resume loop timer
|
|
430 |
iImpl->iLoopTimer->Resume();
|
|
431 |
}
|
|
432 |
|
|
433 |
// -----------------------------------------------------------------------------
|
|
434 |
// EffectInfo.
|
|
435 |
// -----------------------------------------------------------------------------
|
|
436 |
TShwEffectInfo CShwZoomAndPanEffect::EffectInfo()
|
|
437 |
{
|
|
438 |
return iImpl->iEffectInfo;
|
|
439 |
}
|