phonebookui/Phonebook/View/inc/CPbkEmbeddedThumbnail.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 10:12:17 +0200
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/*
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* Copyright (c) 2002 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: 
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*       Phonebook contact item field embedded thumbnail reader.
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*       Reads an database-embedded picture from a field.
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*
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*/
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#ifndef __CPbkEmbeddedThumbnail_H__
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#define __CPbkEmbeddedThumbnail_H__
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//  INCLUDES
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#include "CPbkThumbnailReaderBase.h"
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#include "CPbkThumbnailWriterBase.h"
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// FORWARD DECLARATIONS
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class TPbkContactItemField;
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class TPbkImageLoadParameters;
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class CPbkFFSCheck;
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// CLASS DECLARATION
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/**
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 * Phonebook contact item field embedded thumbnail reader.
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 * Reads an database-embedded picture from a field.
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 */
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NONSHARABLE_CLASS(CPbkEmbeddedThumbnailReader) : 
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        public CPbkThumbnailReaderBase
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    {
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    public: // interface
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        /**
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         * Creates a new instance of this class.
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         *
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         * @param aField    field to read the thumbnail from.
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         * @param aObserver observer to notify about progress of this 
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         *                  operation.
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         */
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        static CPbkEmbeddedThumbnailReader* NewLC
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            (const TPbkContactItemField& aField, 
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            MPbkThumbnailGetObserver& aObserver);
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        /**
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         * Destructor. Cancels any previously executing read operation and
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         * destroys this object.
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         */
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        ~CPbkEmbeddedThumbnailReader();
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    public:  // from MPbkThumbnailReader
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        void StartReadL(const TPbkImageLoadParameters* aParameters = NULL);
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    private: // implementation
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        CPbkEmbeddedThumbnailReader
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            (const TPbkContactItemField& aField, 
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            MPbkThumbnailGetObserver& aObserver);
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        void ConstructL();
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    private: // data members
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        /// Ref: Contact item field
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        const TPbkContactItemField& iField; 
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    };
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/**
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 * Phonebook contact item field embedded thumbnail reader.
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 * Reads an database-embedded thumbnail image from a field.
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 */
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NONSHARABLE_CLASS(CPbkEmbeddedThumbnailImageReader) : 
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        public CPbkThumbnailImageReaderBase
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    {
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    public: // Interface
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        /**
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         * Creates a new instance of this class.
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         *
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         * @param aField    field to read the thumbnail image from.
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         * @param aObserver observer to notify about progress of this 
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         *                  operation.
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         * @return new instance of this class.
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         */
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        static CPbkEmbeddedThumbnailImageReader* NewLC
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            (const TPbkContactItemField& aField, 
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            MPbkThumbnailGetImageObserver& aObserver);
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        /**
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         * Destructor. Cancels any previously executing read operation and
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         * destroys this object.
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         */
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        ~CPbkEmbeddedThumbnailImageReader();
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    public:  // From CPbkThumbnailImageReaderBase
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        void DoStartReadL(const TPbkImageLoadParameters* aParameters = NULL);
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        MPbkImageData* CreateImageDataLC();
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    private: // Implementation
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        CPbkEmbeddedThumbnailImageReader
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            (const TPbkContactItemField& aField, 
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            MPbkThumbnailGetImageObserver& aObserver);
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        void ConstructL();
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        const TDesC8& ImageBuffer() const;
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    private: // data members
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        /// Ref: Contact item field
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        const TPbkContactItemField& iField; 
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    };
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/**
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 * Phonebook contact item field embedded thumbnail writer.
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 * Writes an database-embedded picture to a field.
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 */
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NONSHARABLE_CLASS(CPbkEmbeddedThumbnailWriter) : 
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        public CPbkThumbnailWriterBase 
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    {
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    public: // interface
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        /**
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         * Creates a new instance of this class.
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         *
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         * @param aField    field to write the thumbnail to.
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         * @param aObserver observer to notify about progress of this 
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         *                  operation.
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         */
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        static CPbkEmbeddedThumbnailWriter* NewLC
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            (TPbkContactItemField& aField, 
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            MPbkThumbnailSetObserver& aObserver);
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        /**
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         * Destructor.
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         */
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        ~CPbkEmbeddedThumbnailWriter();
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    private: // from CPbkThumbnailWriterBase
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        CImageEncoder* CreateImageWriterL();
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        void StoreImageL(const MPbkImageData& aImageData);
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        void StoreImageL(CImageEncoder& aImageWriter);
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        void DoCancel();
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        TSize ImageSize() const;
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    private: // implementation
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        CPbkEmbeddedThumbnailWriter
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            (TPbkContactItemField& aField, 
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            MPbkThumbnailSetObserver& aObserver);
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        void ConstructL();
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    private: // data members
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        /// Ref: Contact item field
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        TPbkContactItemField& iField; 
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        /// Own: image buffer
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        HBufC8* iBitmapBlob;
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        /// Own: Critical memory level checker
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        CPbkFFSCheck* iFFSCheck;
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    };
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#endif // __CPbkEmbeddedThumbnail_H__
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// End of File