emailuis/uicomponents/inc/fscontrolbarvisualiser.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:39:21 +0200
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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:  Visualiser class for control bar.
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*
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*/
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#ifndef C_FSCONTROLBARVISUALISER_H
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#define C_FSCONTROLBARVISUALISER_H
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#include <gdi.h>
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class CAlfDeckLayout;
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class CAlfVisual;
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class CAlfLayout;
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class CAlfTexture;
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class CAlfFrameBrush;
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class CAlfImageBrush;
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class CAlfGradientBrush;
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class CAlfTexture;
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class CFsControlBar;
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class CFsControlBarModel;
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/**
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 *  Visualiser class of ControlBar component
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 *
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 *  @code
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 *
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 *  @endcode
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 *
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 *  @lib fs_generic.lib
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 */
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NONSHARABLE_CLASS( CFsControlBarVisualiser ) : public CBase
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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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     * @param aParentControl Parent control.
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     * @param aModel Model of control bar.
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     */
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    static CFsControlBarVisualiser* NewL(
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        CFsControlBar& aParentControl,
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        CFsControlBarModel& aModel );
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    /**
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     * Destructor
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     */
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    virtual ~CFsControlBarVisualiser();
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    /**
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     * Starts redrawing of the control bar.
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     *
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     * @param aScreenSizeChanged Screen size changed -> bar's width
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     * has to be recalculated.
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     */
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    void RefreshL( TBool aScreenSizeChanged = EFalse );
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    /**
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     * Sets bar's background color.
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     *
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     * @param aColor Background color to be set.
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     */
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    void SetBackgroundColor( const TRgb& aColor );
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    /**
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     * Clears bar's background color. Bar is transparent.
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     */
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    IMPORT_C virtual void ClearBackgroundColor();
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    /**
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     * Sets bar's image.
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     *
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     * @param aImage Background image to be set.
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     */
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    void SetBackgroundImageL( CAlfTexture& aImage );
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    /**
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     * Clears bar's background image.
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     */
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    void ClearBackgroundImage();
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    /**
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     * Update the size of the controlbar layout.
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     */
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    void UpdateSizeL();
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    /**
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     * Retrieves layouter of the control bar.
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     *
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     * @return Control bar's layouter.
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     */
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    CAlfDeckLayout* Layout();
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    /**
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     * Sets transition time for selector.
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     *
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     * @param aTransitionTime Transition time in miliseconds.
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     */
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    void SetSelectorTransitionTimeL( TInt aTransitionTime );
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    /**
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     * Set selector image.
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     * Gaines the ownership of the brush.
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     *
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     * @param aSelectorBrush New selector brush.
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     * @param aOpacity Opacity of the selector.
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     */
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    void SetSelectorImageL( CAlfBrush* aSelectorBrush, TReal32 aOpacity );
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    /**
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     * Hides selector. Invoked when bar is focused no more.
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     */
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    void HideSelector();
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    /**
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     * Reorder the visuals. Button visual are build from two separate visual,
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     * background and content. Those are arranged so that the background
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     * visual are set at back and contents are to front. Selector visual is
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     * placed between them.
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     */
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    void ReorderVisuals();
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    /**
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     * Enables selector drawing.
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     * NOTE: Do not change focus state. Item might be focused altough
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     *       selector is not visible.
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     *  @param aShow if ETrue selector can be drawn.
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     *  @param aFromTouch tells that was method called after touch event.
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     */
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    void MakeSelectorVisible( TBool aShow, TBool aFromTouch = EFalse );
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private:
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    /**
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     * Constructor.
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     *
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     * @param aParentControl Parent control.
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     * @param aModel Model of control bar.
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     */
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    CFsControlBarVisualiser( CFsControlBar& aParentControl,
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        CFsControlBarModel& aModel );
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    /**
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     * Second phase constructor.
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     */
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    void ConstructL();
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    /**
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     * Draws selector over selected (focused) button.
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     *
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     * @param aSelectedButtonIndex Index of the button.
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     * @param aFastDraw Updates selector's position without any transition
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     * delay.
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     */
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    void DrawSelectorL( const TInt aSelectedButtonIndex, TBool aFastDraw );
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private: // data
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    /**
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     * Model of control bar.
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     * Not own.
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     */
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    CFsControlBarModel& iModel;
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    /**
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     * Parent control.
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     * Not own.
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     */
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    CFsControlBar& iParent;
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    /**
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     * Layout for control bar.
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     * Not own.
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     */
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    CAlfDeckLayout* iBarLayout;
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    /**
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     * Background layout for control bar.
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     * Not own.
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     */
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    CAlfLayout* iBgLayout;
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    /**
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     * Background color.
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     */
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    CAlfGradientBrush* iBgColor;
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    /**
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     * Brush with the default background image.
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     * Owned.
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     */
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    CAlfFrameBrush* iDefaultBgBrush;
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    /**
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     * Brush with the background image.
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     * Owned.
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     */
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    CAlfImageBrush* iBgImage;
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    /**
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     * Visual for image of selector.
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     * Not own.
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     */
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    CAlfVisual* iSelector;
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    /**
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     * Brush for selector.
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     * Owned.
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     */
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    CAlfBrush* iSelectorBrush;
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    /**
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     * Selector's opacity.
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     */
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    TReal32 iSelectorOpacity;
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    /**
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     * Index of last selected button.
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     */
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    TInt iLastSelectedButton;
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    /**
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     * Flag that states if event was received after touch event.
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     */
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    TBool iTouchPressed;
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    };
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#endif // C_FSCONTROLBARVISUALISER_H