inc/alf/alfimagevisualattributesetter.h
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:23:18 +0100
branchRCL_3
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/*
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* Copyright (c) 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:   Image visual attribute setter Header.
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*
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*/
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#ifndef ALFIMAGEVISUALATTRIBUTESETTER_H
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#define ALFIMAGEVISUALATTRIBUTESETTER_H
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#include <osn/osndefines.h>
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#include "alf/alfcommonvisualattributesetter.h"
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class CAlfImageVisual;
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namespace Alf
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    {
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class AlfImageVisualAttributeSetterImpl;
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class IAlfVariantType;
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class ResourcePool;
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/**
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 *  @class AlfImageVisualAttributeSetter alfimagevisualattributesetter.h "alf/alfimagevisualattributesetter.h"
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 *  The implementation of the attribute setter for setting image visual attributes.
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 *  @see IAlfAttributeSetter
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 *
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 *  @lib alfwidgetmodel.lib
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 *  @since S60 ?S60_version
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 *  @status Draft
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 *  @interfaces IAlfAttributeSetter
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 */
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class AlfImageVisualAttributeSetter : public AlfCommonVisualAttributeSetter
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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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     * @param aType Type of the attribute setter.
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     */
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    OSN_IMPORT AlfImageVisualAttributeSetter();
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    /**
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     * Destructor.
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     */
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    OSN_IMPORT virtual ~AlfImageVisualAttributeSetter();
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    /**
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     * Sets the attribute values to the target visual.
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     * @exception osncore::AlfVisualException Thrown with error code osncore::EInvalidVisual if aVisual 
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     *                                        is not an image visual.
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     * @exception osncore::AlfDataException   Thrown with error code osncore::EInvalidAttribute if the data field  
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     *                                        for data attributes is 0.
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     * @exception osncore::AlfDataException   Thrown with error code osncore::EInvalidVariantDataType if aData  
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     *                                        for data attributes is 0.
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     * @exception osncore::AlfDataException   Thrown with error code osncore::EIncompleteAttributeValues if an  
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     *                                        attempt is made to set a color attribute with insufficient data. 
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     *                                        See language specification on how to create this attribute.
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     * @exception osncore::AlfDataException   Thrown with error code osncore::EInvalidAttribute if an  
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     *                                        attempt is made to set a color attribute with incompatible data types. 
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     *                                        See language specification on how to create this attribute.
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     * @exception osncore::AlfDataException   Thrown with error code osncore::EInvalidAttribute if an  
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     *                                        attempt is made to set a drop shadow attribute with incompatible data. 
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     *                                        See language specification on how to create this attribute.
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     * @exception osncore::AlfDataException   Thrown with Symbian error code if the skin animation ID cannot be retreived 
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     *                                        while setting an animated skin image.
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     * @exception osncore::AlfDataException   Thrown with Symbian error code if the skin frame ID cannot be retreived 
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     *                                        while setting an skin frame image.
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     * @exception osncore::ThemeException     Thrown when skinid is not found.
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     *
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     * @since S60 ?S60_version
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     * @param aVisual The target visual. Doesn't take ownership.
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     * @param aContainer The container holding the value of the attributes.
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     *        Ownership of the object is not transferred.
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     * @param aData Used with data attributes to fetch the data.
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     */
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    OSN_IMPORT virtual void setAttributeValue (
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        CAlfVisual &aVisual,
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        AlfAttributeContainer* aContainer,
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        IAlfMap* aData );
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    /**
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     * Creates a command to change the value of an attribute in the target visual gradually with a transition.
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aContainer The container holding the new value of the attribute. Ownership of the object is not transferred.
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     * @param aData Not used currently.
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     * @param aTransitionTime Time used for the transition.
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     * @param aRefVisual Optional reference visual. If not NULL, the target value of the attribute is defined by adding
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     * the value specific by aContainer to the corresponding attribute value in the reference visual.
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     * @ret The command to gradually change the attribute in the target visual.
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     */
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    OSN_IMPORT virtual TAlfCommand* createCommand(
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        CAlfVisual& aVisual,
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        AlfAttributeContainer* aContainer,
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        IAlfMap* aData,
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        int aTransitionTime = 0,
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        CAlfVisual* aRefVisual = NULL );
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    /**
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     * Creates commands to change the given attribute values in the target visual gradually with a transition.
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     * Then sends the commands via the ALF environment.
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aContainer The attribute container holding the attribute value(s)
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     * used by the attribute setter. Ownership is not transferred. The container
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     * can hold new values for multiple different attributes, in which case several
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     * commands are executed.
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     * @param aRefVisual Optional reference visual. If not NULL, the target value of the attribute is defined by adding
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     * the value specific by aContainer to the corresponding attribute value in the reference visual.
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     */
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    OSN_IMPORT virtual void createAndSendCommands(
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        CAlfVisual& aVisual,
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        AlfAttributeContainer* aContainer,
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        CAlfVisual* aRefVisual = NULL );
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protected:
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    /**
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     * From AlfCommonVisualAttributeSetter
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     * Sets an value of a static attribute to target visual immediately without a transition.
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aAttr The attribute to process. Doesn't take ownership
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     * @param aContainer The container holding attributes. Ownership of the object is not transferred.
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     * @param aData Contains data.Ownership of the object is not transferred.
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     */
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    virtual void handleStaticAttribute(CAlfVisual &aVisual, AlfAttribute& aAttr, AlfAttributeContainer& aContainer);
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    /**
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     * From AlfCommonVisualAttributeSetter
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     * Sets an dynamic attribute value in the target visual using transitions defined in attributes
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aAttr The attribute to process. Doesn't take ownership
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     * @param aContainer The container holding attributes. Ownership of the object is not transferred.
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     * @param aData Contains data.Ownership of the object is not transferred.
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     */
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    virtual void handleDynamicAttribute(CAlfVisual &aVisual, AlfAttribute& aAttr, AlfAttributeContainer& aContainer);
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    /**
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     * From AlfCommonVisualAttributeSetter
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     * Sets an value for static attribute in the target visual immediately without a transition using data in map.
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aAttr The attribute to process. Doesn't take ownership
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     * @param aContainer The container holding attributes. Ownership of the object is not transferred.
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     * @param aData Contains data.Ownership of the object is not transferred.
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     */
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    virtual void handleStaticDataAttribute(CAlfVisual &aVisual, AlfAttribute& aAttr, AlfAttributeContainer& aContainer, IAlfMap* aData);
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    /**
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     * From AlfCommonVisualAttributeSetter
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     * Sets an value for dynamic attribute value in the target visual using transitions and data in map.
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aAttr The attribute to process. Doesn't take ownership
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     * @param aContainer The container holding attributes. Ownership of the object is not transferred.
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     * @param aData Contains data.Ownership of the object is not transferred.
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     */
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    virtual void handleDynamicDataAttribute(CAlfVisual &aVisual, AlfAttribute& aAttr, AlfAttributeContainer& aContainer, IAlfMap* aData);
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private:
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    /**
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     * Sets FrameImage for aVisual using the frame skin id stored in aAttr
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     *
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     * @param aVisual The target visual. Doesn't take ownership
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     * @param aSkinFrameImage LogicalName for the frame image. Ownership of the object is not transferred
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	 * @param aContainer The container holding attributes. Ownership of the object is not transferred.
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	 * @param aData datamap used in staticdata case. Ownership of the object is not transferred.
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	 *
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	 * @exception osncore::ThemeException  Thrown when SkinId is not found. 
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     */
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    void setFrameImage(CAlfVisual& aVisual,const Utf8* aSkinFrameID, const AlfAttributeContainer& aContainer,IAlfMap* aData=NULL);
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    /**
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     * Gets the attribute value based on whether attribute type is static or staticdata.
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	 *
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     * @param aAttr The attribute to process. Doesn't take ownership.
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     * @param aData datamap used in staticdata case. Doesn't take ownership
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     *
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     * @return returns the attributeValue.. 	 
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     */ 
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    int getValueFromAttribute(const AlfAttribute& aAttr,IAlfMap* aData) const;
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    void HandleImagePathAttribute(
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        const TPtrC8& aStringValue,
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        CAlfImageVisual* aImageVisual,
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        bool aPrimary );
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private: // data
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    auto_ptr<AlfImageVisualAttributeSetterImpl> mImpl;
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    };
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    } // namespace Alf
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#endif // ALFIMAGEVISUALATTRIBUTESETTER_H
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