idlehomescreen/xmluicontroller/inc/transactionfactory.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:40:49 +0200
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/*
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* Copyright (c) 2005-2007 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:  Transaction factory
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*
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*/
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#ifndef M_TRANSACTIONFACTORY_H
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#define M_TRANSACTIONFACTORY_H
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namespace AiXmlUiController
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    {
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    class MTransaction;
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    class MTransactionElement;
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    }
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class CXnNodeAppIf;
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class CGulIcon;
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class RFile;
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namespace AiXmlUiController
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{
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/**
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*  MTransactionFactory provides life-cycle management of transactions and
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*  transaction elements.
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*
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*  @lib AiXmlUiMain
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*/
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class MTransactionFactory
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    {
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public:
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    // New functions
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    /**
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    * Creates a new transaction.
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    *
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    * @param aTxId the transaction identifier
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    */
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    virtual MTransaction* CreateTransactionL( TInt aTxId ) = 0;
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    /**
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    * Releases a transaction element.
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    *
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    * @param aTransaction the transaction to release
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    */
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    virtual void ReleaseTransaction( MTransaction* aTransaction ) = 0;
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    /**
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    * Creates a new text transaction element.
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    *
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    * @param aTarget the target node of the transaction element
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    * @param aText the text to update 
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    */
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    virtual MTransactionElement*
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        CreateTextTransactionElementL( CXnNodeAppIf& aTarget,
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                                       const TDesC& aText,
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                                       TInt aPriority ) = 0;
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    /**
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    * Creates a new data buffer transaction element.
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    *
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    * @param aTarget the traget node of the transaction element
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    * @param aData the data to update
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    */
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    virtual MTransactionElement*
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        CreateDataBufferTransactionElementL( CXnNodeAppIf& aTarget,
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                                             const TDesC8& aData,
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                                             TInt aPriority ) = 0;
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    /**
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    * Creates a new empty content transaction element.
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    *
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    * @param aTarget the target node of the transaction element
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    * @param aText the text to update 
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    */
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    virtual MTransactionElement*
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        CreateEmptyContentTransactionElementL( CXnNodeAppIf& aTarget,
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                                               TInt aIndex ) = 0;
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    /**
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    * Creates a new image transaction element.
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    *
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    * @param aTarget the target node of the transaction element
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    * @param aIcon the icon to update. Ownership transferred.
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    */
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    virtual MTransactionElement*
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        CreateImageTransactionElementL( CXnNodeAppIf& aTarget,
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                                        CGulIcon* aIcon,
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                                        TInt aPriority ) = 0;
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    /**
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    * Creates a new image transaction element.
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    *
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    * @param aTarget the target node of the transaction element
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    * @param aFile the file to read image data from.
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    */
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    virtual MTransactionElement*
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        CreateImageTransactionElementL( CXnNodeAppIf& aTarget,
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                                        RFile& aFile,
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                                        TInt aPriority ) = 0;
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    /**
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    * Releases a transaction element.
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    *
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    * @param aElement the element to release.
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    */
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    virtual void ReleaseTransactionElement(
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        MTransactionElement* aElement ) = 0;
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    /**
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    * Checks if given content type is supported by target element.
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    *
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    * @param aTarget the target UI element.
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    * @param aContentType the content type
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    * @return ETrue if content type is supported, otherwise EFalse.
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    */
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    virtual TBool IsSupported( CXnNodeAppIf& aTarget,
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                               const TDesC8& aContentType ) = 0;
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protected:
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    ~MTransactionFactory(){};
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    };
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} // namespace AiXmlUiController
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#endif      // M_TRANSACTIONFACTORY_H  
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//  End of File