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/*
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* Copyright (c) 2008-2009 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: Definition of CGlxZoomControl
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*
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*/
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#ifndef C_GLXZOOMCONTROL_H
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#define C_GLXZOOMCONTROL_H
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// INCLUDES
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#include <w32std.h> // For TEventCode
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#include <alf/alfcontrol.h>
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#include <alf/ialfwidgeteventhandler.h>
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#include <gestureobserver.h>
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#include <gesturehelper.h>
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#include <mglxtextureobserver.h>
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#include <mglxmedialist.h>
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#include <mglxzoomeventhandlers.h>
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#include <glxfullscreenview.hrh>
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#include <glxzoomeventhandler.h>
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#include <mglxtvobserver.h> // for inteface MGlxTvObserver
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#include "glxrequestfreegoom.h"
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//Gesture Helper namespace
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namespace GestureHelper
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{
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class CGestureHelper;
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}
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namespace Alf
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{
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class IAlfViewWidget;
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class IMulSliderWidget;
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class IMulSliderModel;
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class IAlfWidgetEventHandler;
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}
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// FORWARD DECLARATIONS
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class CGlxDefaultAttributeContext;
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class CGlxUiUtility;
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class MGlxUiCommandHandler;
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class CAlfImageVisual;
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class CAlfViewportLayout;
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class TAlfImage;
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class CEikButtonGroupContainer;
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class CGlxTextureManager;
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class CGestureHelper;
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class MGestureObserver;
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class CGlxTv;
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using namespace Alf;
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// Commands sent to the view in response to zoom keys
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const TInt KGlxZoomInCommand = 1 ;
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const TInt KGlxZoomOutCommand = 2 ;
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const TInt KGlxZoomOrientationChange =3;
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const TInt KGlxVerticalImageOrientationThreshold = 4 ;
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/**
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* Control for zooming in the FullScreen view.
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* @ingroup glx_view_zoomed_view
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*/
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class CGlxZoomControl : public CAlfControl,
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public IAlfWidgetEventHandler,
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public MGlxTextureObserver,
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public MGlxZoomEventHandlers,
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public GestureHelper::MGestureObserver,
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public MGlxTvObserver,
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public MGoomNotifierObserver
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{
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public:
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// Constructors and destructor
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/**
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* Two-phased constructor.
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* @param aCommandHandler: Handler for commands.
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* @param aMediaList : Reference to media list.
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* @param aZoomKeys : Reference to Back Key.
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* @param aSliderWidget : Reference to slider widget created in fullscreen view.
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*/
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IMPORT_C static CGlxZoomControl* NewL(
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MGlxUiCommandHandler& aCommandHandler,
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MGlxMediaList& aMediaList,CEikButtonGroupContainer& aZoomKeys,
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IMulSliderWidget& aSliderWidget, GestureHelper::CGestureHelper* aGestureHelper);
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/**
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* Destructor.
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*/
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~CGlxZoomControl();
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/**
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* Show the control and begin zooming in.
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* @param aIntialZoomLevel:The Initial Zoom Level shown when zoom is active from full screen view.
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* @param aTap :if the zoom was launched by tapping or by pressing volume key.
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* @param aViewingMode :if the image is opened from imgviewer or not
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*/
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IMPORT_C void ActivateL(TInt aIntialZoomRatio,TZoomStartMode aStartMode,TInt aFocusIndex,
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TGlxMedia& aItem, TPoint* aZoomFocus = NULL
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,TBool aViewingMode = EFalse);
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/**
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* Hide the control and disable zooming.
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*/
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IMPORT_C void Deactivate();
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/**
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* to check if the zoom control is activated?
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*/
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IMPORT_C TBool Activated();
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/**
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* Zoom Foreground event handling function
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* @param aForeground: value signify if it is in foreground or not.
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*/
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IMPORT_C void HandleZoomForegroundEvent(TBool aForeground);
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void UpdateViewPort(
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TPoint& aViewPortTopLeft ,
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TInt aTransitionTime ,
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TSize *apViewPortDimension = NULL,
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TInt aPrimarySliderLevel = -1);
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/**
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* Retrieve the UI State of the Zoom view
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*/
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IMPORT_C TUiState ZoomUiState();
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private:// From MGlxTvObserver
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virtual void HandleTvStatusChangedL ( TTvChangeType aChangeType );
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private: // From CAlfControl
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TBool OfferEventL(const TAlfEvent &aEvent);
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void VisualLayoutUpdated(CAlfVisual &aVisual);
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private: //From IAlfWidgetEventHandler
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AlfEventStatus offerEvent( CAlfWidgetControl& /*aControl*/, const TAlfEvent& aEvent );
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bool accept( CAlfWidgetControl& aControl, const TAlfEvent& aEvent ) const;
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void setEventHandlerData( const AlfWidgetEventHandlerInitData& aData );
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AlfWidgetEventHandlerInitData* eventHandlerData();
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void setActiveStates( unsigned int aStates );
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IAlfInterfaceBase* makeInterface( const IfId& aType );
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AlfEventHandlerType eventHandlerType() ;
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AlfEventHandlerExecutionPhase eventExecutionPhase() ;
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private: // From MGlxTextureObserver
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void TextureContentChangedL( TBool aHasContent , CAlfTexture* aNewTexture);
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private: // From MGlxZoomEventHandlers
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void HandleViewPortParametersChanged(TPoint& aViewPortTopLeft ,
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TInt aTransitionTime ,
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TSize *apViewPortDimension = NULL,
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TInt aPrimarySliderLevel = -1);
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void HandleShowUi(TBool aShow= EFalse) ;
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void HandleZoomOutL(TInt aCommandId);
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private:
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/*
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* Call back function for the CPeriodic
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*/
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static TInt TimeOut(TAny* aSelf);
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void ActivateFullscreen();
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void StartZoomAnimation(TZoomStartMode aStartMode);
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private:
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/**
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* C++ default constructor.
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*/
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CGlxZoomControl(MGlxUiCommandHandler& aCommandHandler,
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MGlxMediaList& aMediaList,CEikButtonGroupContainer& aZoomKeys,
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IMulSliderWidget& aSliderWidget, GestureHelper::CGestureHelper* aGestureHelper);
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/**
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* Does the necessary Initialization of iUiUtility,control group and the Media list.
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*/
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void ConstructL();
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/**
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* Creation of zoomvisual:creates the zoom visual and sets the Black Background behind the image
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* and also sets the ViewPort Layout.
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*/
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void CreateZoomVisualL();
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/**
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* Turn the UI/Screen Furniture[Back Key/Slider] on
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*/
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void ShowUi(TBool aShow);
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/**
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* Cleanup function resets all the memeber variable on deactivating the ZoomControl
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*/
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void CleanUpVisual();
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/*
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* Get Orientation of the file ,
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* This code is DUPLICATE and second copy implemented in bitmapdecoder,
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* Got to plan for removing this duplicacy
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*/
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TUint16 GetOrientationL(const TDesC& aFileName) ;
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/*
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* This Function Shows/Hides the zoom
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* by setting the level of Opacity
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*/
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void ShowZoom(TBool aShow);
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/*
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* Retrieves the Screensize with the help of Alf utility
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*/
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TSize ScreenSize();
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void HandleGestureL( const GestureHelper::MGestureEvent& aEvent );
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TBool HandlePointerEventsL(const TAlfEvent &aEvent);
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TReal32 GetInitialZoomLevel(TSize& aSize );
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/*
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* Does the zoom out on pinch released event
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*/
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void HandleHDMIGestureReleased();
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/*
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* @ Notification from MGoomNotifierObserver
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*/
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void HandleGoomMemoryReleased(TInt aStatus);
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private: // Data
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CAlfEnv* iEnv; // AlfEnv
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MGlxMediaList& iMediaList; // Medialist (not owned)
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GestureHelper::CGestureHelper* iGestureHelper; // Attribute context for image dimensions
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IMulSliderModel* iZoomSliderModel; // Zoom slider model
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IMulSliderWidget& iZoomSliderWidget; // Zoom slider Widget
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CEikButtonGroupContainer* iZoomBackKey; // Back zoom soft key(not owned)
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CGlxDefaultAttributeContext* iAttributeContext; // Attribute context for image dimensions
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CAlfDisplay* iDisplay; // Alf Display
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CGlxUiUtility* iUiUtility; // UI utility
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CGlxTextureManager* iTextureMgr; // TextureManager
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CAlfControlGroup* iControlGroup; // Control group for the Zoom control
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CAlfViewportLayout* iViewPort; // Parent Layout for Zooming/Panning
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CAlfImageVisual* iImageVisual; // Child visual for normal image items (not owned)
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CAlfTexture* iImageTexture; // Texture to be zoomed
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TBool iIsdrag; // To determine if drag occured to evaluate the single tap
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TBool iZoomActive; // This variable is updated when Zoom is activated.
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TSize iOriginalDimensions;
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MGlxUiCommandHandler& iCommandHandler; // For Handling ZoomOut commands
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CGlxZoomPanEventHandler* iEventHandler; // The event handler for the Zoom Pan Engine
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TSize iScreenSize;
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TBool iMultiTouchGestureOngoing;
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CGlxTv* iGlxTvOut;
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CPeriodic* iTimer;
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TBool iZoomIn;
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CGlxRelaseGPUMemory* iGPUMemMonitor;
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};
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#endif // C_GLXZOOMCONTROL_H
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// End of File
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