1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:     

    15 *

    16 */

    17 

    18 #ifndef HGVGSCROLLBAR_H_

    19 #define HGVGSCROLLBAR_H_

    20 

    21 // INCLUDES

    22 #include <ganes/HgScroller.h>

    23 #include <e32base.h>

    24 #include <VG/openvg.h>

    25 #include <gulcolor.h>

    26 

    27 // FORWARD DECLARATIONS

    28 

    29 class MHgScrollbarObserver;

    30 class CHgScrollbar;

    31 

    32 /**

    33  * Helper class for drawing and interacting scrollbars.

    34  */

    35 NONSHARABLE_CLASS(CHgVgScrollBar) : CBase

    36     {

    37 public:

    38 

    39     /**

    40      * Creates new CHgVGScrollBar.

    41      *

    42      * @param aObserver observer for the scrollbar.

    43      */

    44     static CHgVgScrollBar* NewL( MHgScrollbarObserver& aObserver, 

    45             TRect aScrollbarRect,

    46                         TSize aTotalSize,

    47                         TSize aViewSize,

    48                         TBool aLandscapeScrolling,

    49                         CHgScroller::THgScrollBarType aScrollBarType );

    50             

    51     // Destructor.

    52     virtual ~CHgVgScrollBar();

    53 

    54 public: // METHODS

    55     

    56     void SetViewPosition( TPoint aPosition );

    57     

    58     TBool HandlePointerEventL( const TPointerEvent& aEvent );

    59 

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

    61     

    62     TBool IsEnabled() const;

    63     

    64     void SetEnabled(TBool aEnabled);

    65     

    66     void ResizeL(MHgScrollbarObserver& aObserver, TRect aScrollbarRect,

    67             TSize aTotalSize,

    68             TSize aViewSize,

    69             TBool aLandscapeScrolling,

    70             CHgScroller::THgScrollBarType aScrollBarType);

    71 

    72 protected: // Constructors

    73     CHgVgScrollBar(  );

    74 

    75     void ConstructL (MHgScrollbarObserver& aObserver, TRect aScrollbarRect,

    76             TSize aTotalSize,

    77             TSize aViewSize,

    78             TBool aLandscapeScrolling,

    79             CHgScroller::THgScrollBarType aScrollBarType);

    80 

    81 protected: // Internal implementation

    82 

    83     void CreateImagesL();

    84 

    85     void DrawImage(const TPoint& aPosition, VGImage aImage, 

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

    87     

    88 private:

    89     TBool iEnabled;

    90     

    91     CHgScrollbar* iScrollbar;

    92 

    93     VGImage iScrollbarBg;

    94     VGImage iScrollbarHandleBg;

    95     VGImage iScrollbarHandle;

    96     VGImage iScrollbarBgSelected;

    97     VGImage iScrollbarHandleSelected;

    98                     

    99     };

   100 

   101 #endif /* HGVGSCROLLBAR */