idlehomescreen/inc/xnuienginepluginif.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) 2002-2004 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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* Xuikon layout engine plugin interface.
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*
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*/
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#ifndef XNUIENGINEPLUGINIF_H
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#define XNUIENGINEPLUGINIF_H
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// System includes
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#include <e32base.h>
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// User includes
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// Forward declarations
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class CXnUiEngine;
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class CXnProperty;
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class CXnNodePluginIf;
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class CXnDomStringPool;
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class CXnResource;
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class CXnControlAdapter;
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struct TPointerEvent;
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// Class declaration
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/**
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 * Xuikon layout engine plugin interface.
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 *
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 * @ingroup group_xnlayoutengine
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 * @lib xnlayoutengine.lib
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 * @since Series 60 3.1
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 */
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class TXnUiEnginePluginIf
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    {
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public:
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    /**
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     * C++ default constructor.
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     */
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    TXnUiEnginePluginIf( CXnUiEngine& aUiEngine );
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public:
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    // New functions
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    /**
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     * Calculates the layout of the UI
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     *
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     * @since Series 60 3.1
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     * @param aNode Starting point for the layout
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     * @exception KXnErrLoadLayoutFileFailed Loading the layout file failed.
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     */
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    IMPORT_C void RenderUIL( CXnNodePluginIf* aNode = NULL );
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    /**
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     * Gets the root node of the UI. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @return Node
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     */
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    IMPORT_C CXnNodePluginIf& RootNodeL();
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    /**
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     * Find a node by its id. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @param aNodeId Area id
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     * @param aNamespace Namespace
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     * @return Node with the given id
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     */
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    IMPORT_C CXnNodePluginIf* FindNodeByIdL(
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        const TDesC& aNodeId,
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        const TDesC& aNamespace = KNullDesC );
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    /**
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     * Find a node by its id. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @param aNodeId Area id
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     * @param aNamespace Namespace
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     * @return Node with the given id
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     */
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    IMPORT_C CXnNodePluginIf* FindNodeByIdL(
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        const TDesC8& aNodeId,
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        const TDesC8& aNamespace = KNullDesC8 );
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    /**
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     * Find nodes by class. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @param aClassId Class id
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     * @return Nodes belonging to the class
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     */
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    IMPORT_C RPointerArray< CXnNodePluginIf > FindNodeByClassL(
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        const TDesC& aClassId );
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    /**
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     * Find resources (images etc.) of the UI. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @return Resources of the UI
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     */
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    IMPORT_C CArrayPtrSeg< CXnResource >& Resources();
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    /**
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     * Get currently focused node. Ownership is not transferred.
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     *
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     * @since Series 60 3.1
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     * @return Focused node
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     */
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    IMPORT_C CXnNodePluginIf* FocusedNodeL();
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    /**
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     * Set currently focused node
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     *
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     * @since Series 60 3.1
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     * @param aFocusedNode Focused node
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     */
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    IMPORT_C void SetFocusedNode( CXnNodePluginIf* aFocusedNode );
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    /**
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     * Restore focus to previously focused node
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     *
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     * @since Series 60 3.1
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     */
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    IMPORT_C void RestorePreviousFocusedNode();
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    /**
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     * Get the string pool
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     *
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     * @since Series 60 3.1
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     * @return String pool
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     */
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    IMPORT_C CXnDomStringPool& StringPool();
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    /**
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     * Get a numeric value of a property in vertical pixels
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     *
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     * @since Series 60 3.1
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     * @param aValue Property
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     * @param aReferenceValue Value used for percentage calculation
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     * @return Value in vertical pixels
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     */
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    IMPORT_C TInt VerticalPixelValueL(
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        CXnProperty* aValue,
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        TInt aReferenceValue );
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    /**
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     * Get a numeric value of a property in horizontal pixels
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     *
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     * @since Series 60 3.1
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     * @param aValue Property
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     * @param aReferenceValue Value used for percentage calculation
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     * @return Value in horizontal pixels
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     */
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    IMPORT_C TInt HorizontalPixelValueL(
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        CXnProperty* aValue,
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        TInt aReferenceValue );
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    /**
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     * Get a numeric value of a property in vertical twips
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     *
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     * @since Series 60 3.1
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     * @param aValue Property
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     * @param aReferenceValue Value used for percentage calculation
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     * @return Value in vertical twips
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     */
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    IMPORT_C TInt VerticalTwipValueL(
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        CXnProperty* aValue,
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        TInt aReferenceValue );
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    /**
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     * Get a numeric value of a property in horizontal twips
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     *
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     * @since Series 60 3.1
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     * @param aValue Property
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     * @param aReferenceValue Value used for percentage calculation
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     * @return Value in horizontal pixels
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     */
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    IMPORT_C TInt HorizontalTwipValueL(
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        CXnProperty* aValue,
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        TInt aReferenceValue );
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    /**
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     * Activate a view
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     *
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     * @since Series 60 3.1
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     * @param aViewNode View node
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     */
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    IMPORT_C void ActivateViewL( CXnNodePluginIf& aViewNode );
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    /**
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     * Get the size of the current screen device
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     *
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     * @since Series 60 3.1
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     * @return Size of the current screen device
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     */
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    IMPORT_C TSize ScreenDeviceSize();
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    /**
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     * Checks whether the dialog is displaying.
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     *
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     * @since Series 60 3.1
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     * @return ETrue if dialog is displaying.
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     */
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    IMPORT_C TBool IsDialogDisplaying();
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    /**
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     * Sets the given node dirty.
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     *
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     * @since Series 60 3.1
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     * @param aNode A node to be set dirty.
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     */
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    IMPORT_C void AddDirtyNodeL( CXnNodePluginIf& aNode );
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    /**
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     * Checks whether the menu is displaying.
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     *
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     * @since Series 60 3.1
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     * @return ETrue if menu is displaying.
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     */
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    IMPORT_C TBool IsMenuDisplaying();
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    /**
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     * Calculates the layout of the UI.
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     *
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     * @since Series 60 3.1
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     * @param aNode Starting point for the layout
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     */
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    IMPORT_C void LayoutUIL( CXnNodePluginIf* aNode = NULL );
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    /**
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     * Gets the edit mode state from UI Engine.
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     *
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     * @since Series 60 5.0
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     * @return A state of edit mode.
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     */
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    IMPORT_C TInt EditMode();
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    /**
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     * Gets widgets visibilty state
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     *
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     * @since Series 60 5.0
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     * @return ETrue if widgets visible, EFalse otherwise
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     */
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    IMPORT_C TBool WidgetsVisible() const;
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    /**
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     * Gets control defining hit region
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     *
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     * @since Series 60 5.0
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     * @return Control defining the hit region
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     */
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    IMPORT_C CXnControlAdapter* HitRegion() const;
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    /**
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     * Deactivates focused node
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     *
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     * @since Series 60 5.0
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     */
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    IMPORT_C void DeactivateFocusedNodeL();
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    /**
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     * Queries wheter focus is visible
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     *
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     * @since Series 60 5.0
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     * @return ETrue if focus is shown, EFalse otherwise
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     */
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    IMPORT_C TBool ShowFocus();
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    /**
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     * Gets a plugin node which the given node is.
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     *
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     * @since Series 60 5.0
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     * @param aNode Node to start.
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     * @return A Plugin node.
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     */
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    IMPORT_C CXnNodePluginIf& PluginNodeL( CXnNodePluginIf* aNode );
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    /**
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     * Sets focus visibility for active view
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     * @since Series 60 5.0
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     * @param aVisible Visibility state
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     */                
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    IMPORT_C void SetFocusVisibleL( TBool aVisible );
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    /**
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     * Return focus visibility of active view
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     * @since Series 60 5.0
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     * @return ETrue if active view focus is visible, EFalse otherwise
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     */                
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    IMPORT_C TBool FocusVisible();
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    /**
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     * Enables or disables swipe for active view
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     * @since Series 60 5.0
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     * @param aEnable True will enable swipe, false will disable
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     */                
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    IMPORT_C void EnableSwipeL( TBool aEnable );
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    /**
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     * Return whether swipe is enabled or not
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     * @since Series 60 5.0
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     * @return ETrue if swipe is enable, EFalse otherwise
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     */                
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    IMPORT_C TBool SwipeEnabledL();
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    /**
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     * Disables layoyt and redraw, places cleanup item to cleanup stack
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     * for enabling layot and redraw
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     * 
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     * @since Series 60 5.0     
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     */                        
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    IMPORT_C void DisableRenderUiLC();
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private:
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    // Data
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    /**
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     * The layout calculation and ui rendering implementation.
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     * Not own.
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     */
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    CXnUiEngine* iUiEngine;
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    };
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#endif