/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:     

*

*/

#ifndef HGVGSCROLLBAR_H_

#define HGVGSCROLLBAR_H_

// INCLUDES

#include <ganes/HgScroller.h>

#include <e32base.h>

#include <VG/openvg.h>

#include <gulcolor.h>

// FORWARD DECLARATIONS

class MHgScrollbarObserver;

class CHgScrollbar;

/**

 * Helper class for drawing and interacting scrollbars.

 */

NONSHARABLE_CLASS(CHgVgScrollBar) : CBase

    {

public:

    /**

     * Creates new CHgVGScrollBar.

     *

     * @param aObserver observer for the scrollbar.

     */

    static CHgVgScrollBar* NewL( MHgScrollbarObserver& aObserver, 

            TRect aScrollbarRect,

                        TSize aTotalSize,

                        TSize aViewSize,

                        TBool aLandscapeScrolling,

                        CHgScroller::THgScrollBarType aScrollBarType );

    // Destructor.

    virtual ~CHgVgScrollBar();

public: // METHODS

    void SetViewPosition( TPoint aPosition );

    TBool HandlePointerEventL( const TPointerEvent& aEvent );

    void Draw(const TRect& aWindowRect, TReal aAlpha) const;

    TBool IsEnabled() const;

    void SetEnabled(TBool aEnabled);

    void ResizeL(MHgScrollbarObserver& aObserver, TRect aScrollbarRect,

            TSize aTotalSize,

            TSize aViewSize,

            TBool aLandscapeScrolling,

            CHgScroller::THgScrollBarType aScrollBarType);

protected: // Constructors

    CHgVgScrollBar(  );

    void ConstructL (MHgScrollbarObserver& aObserver, TRect aScrollbarRect,

            TSize aTotalSize,

            TSize aViewSize,

            TBool aLandscapeScrolling,

            CHgScroller::THgScrollBarType aScrollBarType);

protected: // Internal implementation

    void CreateImagesL();

    void DrawImage(const TPoint& aPosition, VGImage aImage, 

            const TSize& aSize, const TRect& aWindowRect, TReal aAlpha) const;

private:

    TBool iEnabled;

    CHgScrollbar* iScrollbar;

    VGImage iScrollbarBg;

    VGImage iScrollbarHandleBg;

    VGImage iScrollbarHandle;

    VGImage iScrollbarBgSelected;

    VGImage iScrollbarHandleSelected;

    };

#endif /* HGVGSCROLLBAR */