camerauis/cameraapp/generic/inc/CamImageSaveActive.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:18:56 +0200
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/*
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* Copyright (c) 2007-2009 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:  Active object that manages saving and deletion of images*
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*/
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#ifndef CAMIMAGESAVEACTIVE_H
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#define CAMIMAGESAVEACTIVE_H
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//  INCLUDES
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#include <e32base.h>
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#include <badesca.h>
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#include <f32file.h>
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#include <thumbnailmanager.h>
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#include <thumbnailmanagerobserver.h>
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#if defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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#include <harvesterclient.h>
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#endif // defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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// DATA TYPES
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/**
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* Save event type
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*/
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enum TCamSaveEvent
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    {
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    ECamSaveEventStarted,
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    ECamSaveEventComplete,
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    ECamSaveEventBurstComplete,
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    ECamSaveEventUserCancelled,
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    ECamSaveEventDeleted,
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    ECamSaveEventSaveError, 
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    ECamSaveEventCriticalError
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    };
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// CONSTANTS
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#ifdef _DEBUG
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const TUint16* const KCamSaveEventNames[] =
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  {
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  (const TUint16* const)_S16("ECamSaveEventStarted"),
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  (const TUint16* const)_S16("ECamSaveEventComplete"),
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  (const TUint16* const)_S16("ECamSaveEventBurstComplete"),
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  (const TUint16* const)_S16("ECamSaveEventUserCancelled"),
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  (const TUint16* const)_S16("ECamSaveEventDeleted")
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  };
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#endif
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// FORWARD DECLARATIONS
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class CAknProgressDialog;
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class CEikProgressInfo;
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class CCamBufferShare;
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class CCamAppController;
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class CCamBurstCaptureArray;
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// CLASS DECLARATIONS
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/**
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* Abstract API for image save observer. 
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* Provides an asynchronous 'callback' method to inform derived classes
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* that the save operation has been completed.
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*
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*  @since 2.8
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*/
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class MCamImageSaveObserver
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    {
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    public:
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        /**
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        * The image saving operation has completed
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        * @since 2.8
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        * @param aEvent the type of event
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        */
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        virtual void HandleSaveEvent( TCamSaveEvent aEvent ) = 0;
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        /**
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        *
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        */
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        virtual void HandleFileHarvestingComplete() = 0;
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    };
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/**
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*  Class to manage the asynchronous saving and synchronous deletion 
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*  of images.
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*  @since 2.8
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*/
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class CCamImageSaveActive : public CActive
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#if defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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                            ,private MHarvestObserver
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#endif // defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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                            , public MThumbnailManagerObserver
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    {
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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        * @since 2.8
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        * @param aObserver Informed when image saving has completed
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        */
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        static CCamImageSaveActive* NewL( MCamImageSaveObserver& aObserver, 
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                                          CCamAppController&  aController );
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        /**
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        * Destructor.
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        */
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        virtual ~CCamImageSaveActive();
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    public: // Functions from base classes
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        /**
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        * From CActive, cancels the active object
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        * Deletes all files remaining in the save arrays except any currently
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        * saving file. If currently saving, the active object waits until the 
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        * save completes then performs cleanup.. This method is synchronous 
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        * even when it involves a wait for save completion.
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        * @since 2.8
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        */
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        void Cancel();
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    public: // New functions
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        /**
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        * A request for a file to be saved asynchronously, will be scheduled 
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        * immediately if no other save is current, otherwise the save is queued
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        * @since 2.8
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        * @param aFilename the full path and filename to save the image to
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        * @param aImageData the image data to save
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        * @return Whether or not the image data has been successfully added
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        * to the pending save list.
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        */
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        TBool AddToSave( const TDesC&     aFilename, 
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                         CCamBufferShare* aImageData );
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        /**
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        * A request for a file to be deleted. Will prevent any pending save. 
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        * If the file to delete is currently saving the deletion will occur
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        * when the save operation completes.
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        * @since 2.8
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        * @param aFilename the full path and name of the file to be deleted
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        * @param aSaveRequested whether or not a previous request to save this file
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        *                     has been made.
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        * @return System wide error code to indicate success or failure of the deletion
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        */
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        TInt DeleteFile( const TDesC& aFilename, TBool aSaveRequested );
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        /**
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        * Returns whether a particular file has already been saved.
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        * @since 2.8
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        * @param aFilename the name of the file to check.
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        * @return ETrue if the file has been saved.
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        */   
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        TBool AlreadySavedFile( const TDesC& aFilename ) const;
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        /**
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        * Returns whether a particular file is in the process of being saved.
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        * @since 2.8
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        * @param aFilename the name of the file to check.
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        * @return ETrue if the file is in the process of being saved.
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        */   
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        TBool CurrentlySavingFile( const TDesC& aFilename ) const;
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        /**
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        * A request for the progress note to be displayed
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        * @since 2.8
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        * @param aExpectedImages the number of images to be saved
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        */
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        void DisplayProgressNote( TInt aExpectedImages );
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        /**
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        * A request for the progress note to be dismissed when the save completes
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        * @since 2.8
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        */
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        void DismissProgressNote();
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        /**
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        * Set the "Add to album" setting for photos
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        * determines whether or not photos are added to the default capture album
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        * after a successful save
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        * @since 2.8
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        * @param aAdding ETrue if "Add to album" is on, otherwise EFalse
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        */
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        void SetAddImageToAlbum( const TBool aAdding, 
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                                 const TUint32 aDefaultAlbumId );
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        /**
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        * Add the specified file to the default capture album
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        * Called internally for images when save completes. Called externally for
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        * videos as video saving is handled elsewhere. Calls AddToAlbumL().
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        * @since 2.8
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        * @param aFilename The photo or video to add to the capture album
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        * @param aPhoto Indicates if the specified file is a photo or video
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        */
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        void AddToAlbum( const TDesC& aFilename, 
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                         const TBool aPhoto, 
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                         const TUint32 aDefaultAlbumId );
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        /**
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        * The number of items in the saving arrays
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        * @since 2.8
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        * @return A count of items
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        */
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        TInt Count() const;
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        /**
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        * Retrieves the file size of the specified file.        
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        * @since 3.0
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        * @param aFilename The file to return the size of.
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        * @return The size of the file in bytes, or KErrNotFound
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        */                
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        TInt FileSize( const TDesC& aFilename ) const;
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        /**
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        * Stores filename and snapshot handle for thumbnail creation
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        */
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        void CreateThumbnailsL( const CCamBurstCaptureArray& aArray );
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        /**
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        * Calls thumbnailmanager to create thumbnails
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        */
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        void DoCreateThumbnailL();
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        /**
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         * Cancels thumbnail creation for a given snapshot.
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         * @param aSnapshotIndex Index of the snapshot in burst array.
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         */
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        void CancelThumbnail( TInt aSnapshotIndex );
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        void ForceCancel();
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        /**
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        *  From MThumbnailManagerObserver, not used
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        */
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        void ThumbnailPreviewReady( MThumbnailData& aThumbnail, 
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                                    TThumbnailRequestId aId );
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        /**
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        *  From MThumbnailManagerObserver, not used
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        */  
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        void ThumbnailReady( TInt aError, 
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                             MThumbnailData& aThumbnail, 
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                             TThumbnailRequestId aId );
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#if defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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        /*
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        * RegisterForHarvesterEvents
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        */
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        void RegisterForHarvesterEvents();
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        /*
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        * DeRegisterHarverterClientEvents
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        */
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        void DeRegisterHarverterClientEvents();
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    private: // From MHarvestObserver
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        /*
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        * HarvestingComplete
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        */
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        void HarvestingComplete( TDesC& aURI
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#ifdef RD_MDS_2_5             
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                               , TInt aError
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#endif //RD_MDS_2_5                                 
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                                );
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#endif // defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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    private:
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        /**
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        * Constructor
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        * @since 2.8
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        * @param aObserver Informed when image saving has completed
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        */
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        CCamImageSaveActive( MCamImageSaveObserver& aObserver,  
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                             CCamAppController&  aController );
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        /**
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        * 2nd phase construction
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        * @since 2.8
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        */
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        void ConstructL();
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        /**
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        * Schedule to run immediately
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        * @since 2.8
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        */
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        void SetActiveAndCompleteRequest();
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        /**
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        * Cancels the active object
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        * @since 2.8
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        */
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        void DoCancel();
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        /**
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        * Perform the next scheduled task
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        * @since 2.8
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        */
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        void RunL();
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        /**
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        * Handle leave in RunL.
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        * @param aError The error (leave) code from RunL.
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        */
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        TInt RunError( TInt aError );
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        /**
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        * Tidy up after a previous save has completed
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		* @param aDoFlush Should an asyncrhonous flush be done
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        * @since 2.8
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        */
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        void CompleteSaveOperation( TBool aDoFlush );
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        /**
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        * Carry out the next pending save operation
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        * @since 2.8
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        */
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        void DoSaveL();
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        /**
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        * Display the progress note
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        * @since 2.8
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        */
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        void DoDisplayProgressNoteL();
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        /**
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        * Dismiss the progress note when the saves have completed
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        * @since 2.8
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        */
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        void DoDismissProgressNote();
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        /**
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        * Indicate to observers that saving has completed
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        * @param aEvent the cause of completion
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        * @since 2.8
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        */
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        void ReportToObserver( TCamSaveEvent aEvent );
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        /**
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        * Helper method to release all the shared buffers in the array.
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        */
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        void ReleaseAllAndDestroy( RPointerArray<CCamBufferShare>& aArray );
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    private:
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        MCamImageSaveObserver& iObserver; // informed when image saving has completed      
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        CCamAppController& iController;
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   360
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        CDesCArray* iSaveArray;                     // reserved filenames 
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        RPointerArray<CCamBufferShare> iImageArray; // image data (order reflects iSaveArray)
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        CDesCArray* iNameArray;                     // filenames for thumbnail creation
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        RPointerArray<CFbsBitmap> iSnapArray;       // snapshots for thumbnail creation
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        CThumbnailManager* iManager;                // TN manager
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        RFile iFile;                  // Handle to a file object
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        TBool iSaveCurrent;           // Indicates if a saving operation is ongoing
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        TBool iDeleteCurrent;         // If the currently saving file needs deleting
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        TBool iDoCancel;              // If further saves should be cancelled
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        TBool iShowNote;              // If the progress note should be displayed
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        TBool iDismissNote;           // If the progress note should be dismissed 
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                                      // when all saves complete
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        TInt iExpectedImages;         // The number of images expected for progress info
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        TInt iSaveProgressCount;      // The count of images saved for this progress
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        TBool iCompletedBurst;        // If a set of burst images has completed
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        CActiveSchedulerWait iWait;   // To make asychronous synchronous during cancellation
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        // Progress note shown when the applicaiton must wait for saving to complete
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        CAknProgressDialog* iSaveProgressDialog;
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        // The progress bar shown in iSaveProgressDialog
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        CEikProgressInfo* iSaveProgressInfo;
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        TBool iAddImageToAlbum;       // Whether or not images should be added to album
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        TUint32 iDefaultAlbumId;      // To store the default album id from appcontroller
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        TBool iFlushing;
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        RArray<TThumbnailRequestId> iThumbnailRequests; // thumbnail request ids
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   386
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#if defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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        RHarvesterClient iHarvesterClient;
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        TBool iRegisteredForHarvesterEvents;
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        TBool iHarvesterClientConnected;
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#endif // defined(RD_MDS_2_5) && !defined(__WINSCW__) && !defined(__WINS__)
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    };
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#endif      // CAMIMAGESAVEACTIVE_H
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// End of File