idlehomescreen/inc/xneditmode.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: Edit mode for widget drag and drop.
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*
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*/
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#ifndef XNEDITMODE_H
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#define XNEDITMODE_H
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// System includes
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#include <coecntrl.h>
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// Forward declarations
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class CXnUiEngine;
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class CXnViewManager;
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class CXnNode;
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class CFbsBitGc;
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class CFbsBitmap;
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class CFbsBitmapDevice;
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class CWindowToBitmapMappingGc;
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// Class declaration
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/**
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 * Edit mode. Enables widget drag and drop.
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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 5.1
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 */
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NONSHARABLE_CLASS( CXnEditMode ) : public CCoeControl  
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    {
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public:
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    // Data types
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    enum TEditState
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        {
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        ENone = 0x00,
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        EWaitDrag = 0x01,        
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        EShootContent = 0x02,
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        EDragging = 0x04,
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        EDragAndDrop = 0x08,
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        EKeyMove = 0x10
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        };
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public:
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    /**
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     * Two-phased constructor.
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     */
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    static CXnEditMode* NewL( CXnUiEngine& aUiEngine );
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    /**
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     * Destructor.
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     */
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    ~CXnEditMode();
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private:
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    // from CCoeControl
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    /**
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     * @see CCoeControl
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     */
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    void Draw( const TRect& aRect ) const;
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    /**
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     * @see CCoeControl
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     */    
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    void MakeVisible( TBool aVisible );
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    /**
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     * @see CCoeControl
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     */        
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    void HandlePointerEventL( const TPointerEvent& aPointerEvent );
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    /**
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     * @see CCoeControl
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     */        
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    TKeyResponse OfferKeyEventL( const TKeyEvent& aKeyEvent, 
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            TEventCode aType );
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    /**
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     * @see CCoeControl
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     */            
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    void SizeChanged();
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public:
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    // New functions
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    /**
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     * Changes the state of edit mode.
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     *
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     * @since Series 60 5.0
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     * @param aSet The state of edit mode.     
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     */
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    void SetEditModeL( CXnEditMode::TEditState aSet );
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    /**
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     * Gets the status of the edit mode.
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     *
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     * @since Series 60 5.0
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     * @return Edit mode state.
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     */
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    CXnEditMode::TEditState EditState() const;
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    /**
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     * This is for to re-initializing the double buffer when the orientations
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     * is changed
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     *
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     * @since Series 60 5.0
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     */
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    void HandleScreenDeviceChangedL();
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private:
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    // new functions
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    /**
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     * Organizing starts using drag and drop.
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     *
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     * @since Series 60 5.0
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     * @param aNode Node to drag.
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     */
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    void StartDragL( CXnNode& aNode );
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    /**
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     * Reset the dragging state and deletes screenshot bitmaps.
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     *
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     * @since Series 60 5.0
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     */
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    void StopDragL();
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    /**
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     * Updates invalid parts of the screen. Calls internally DrawNow
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     *
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     * @since Series 60 5.0     
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     */
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    void UpdateScreen();
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    /**
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     * Sets the title for status pane
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     *
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     * @since Series 60 5.0
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     */
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    void SetStatusPaneTitleL();
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private:    
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    // Constructors
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    /**
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     * C++ default constructor.
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     */
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    CXnEditMode( CXnUiEngine& aEngine );
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    /**
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     * 2nd phase constructor.
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     */    
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    void ConstructL();
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private:
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    // Data
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    /**
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     * UI engine
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     * Not own.
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     */
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    CXnUiEngine& iUiEngine;
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    /**
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     * View manager
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     * Not own.
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     */
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    CXnViewManager& iViewManager;
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    /**
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     * Screenshot of part of mainpane
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     * Owned
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     */    
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    CFbsBitmap* iMainpane;
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    /**
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     * Screenshot of widget
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     * Owned
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     */
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    CFbsBitmap* iWidget;
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    /**
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     * Mapping Gc
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     * Owned
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     */
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    CWindowToBitmapMappingGc* iMapGc;
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    /**
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     * Bmp device
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     * Owned
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     */
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    CFbsBitmapDevice* iBmpDevice;
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    /**
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     * Bmp Gc
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     * Owned
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     */
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    CFbsBitGc* iBmpGc;          
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    /**
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     * A pointer to the node that is being dragged.
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     * Not own.
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     */
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    CXnNode* iDraggingNode;
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    /**
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     * A pointer to the node that is underneath of the dragging node.
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     * Not own.
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     */
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    CXnNode* iTargetNode;
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    /**
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     * State of edit mode
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     */
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    CXnEditMode::TEditState iState;
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    /**
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     * A point where dragging started from.
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     */
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    TPoint iStylusDownPos;
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    /**
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     * A point where drawing was done last time.
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     */
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    TPoint iPreviousPos;
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   239
               
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    /**
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     * Screenshot draw position
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     */
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    TPoint iDrawPos;
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    /**
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     * Last redraw rect
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     */
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    TRect iLastDrawRect;
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    /**
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     * Flag determine whether drag is occured
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     */
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    TBool iDragged;
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    };
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#endif