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 RADIOSTRIPBASE_H_

    19 #define RADIOSTRIPBASE_H_

    20 

    21 // System includes

    22 #include <HbScrollArea>

    23 

    24 // Forward declarations

    25 class HbWidget;

    26 class QAbstractItemModel;

    27 

    28 // Class declaration

    29 class RadioStripBase : public HbScrollArea

    30 {

    31     Q_OBJECT

    32     Q_PROPERTY(int autoScrollTime READ autoScrollTime WRITE setAutoScrollTime)

    33 

    34 public:

    35 

    36     virtual ~RadioStripBase();

    37 

    38     void setAutoScrollTime( const int time );

    39     int autoScrollTime() const;

    40 

    41     void setModel( QAbstractItemModel* model );

    42     QAbstractItemModel* model() const;

    43 

    44     void setCyclic( bool isCyclic );

    45     void setOverlap( qreal overlap );

    46     void setAutoCenter( bool autoCenter );

    47     void setItemSize( const QSizeF& size );

    48     void setIndex( int index, bool animateToCenter );

    49 

    50 protected:

    51 

    52     RadioStripBase( QGraphicsItem* parent = 0 );

    53 

    54 // from base class QGraphicsWidget

    55 

    56     void resizeEvent( QGraphicsSceneResizeEvent* event );

    57 

    58 // from base class QGraphicsItem

    59 

    60     void mousePressEvent( QGraphicsSceneMouseEvent* event );

    61     void mouseReleaseEvent( QGraphicsSceneMouseEvent* event );

    62 

    63 private:

    64 

    65     Q_DISABLE_COPY( RadioStripBase )

    66 

    67 // from base class HbScrollArea

    68 

    69     bool scrollByAmount( const QPointF& delta );

    70 

    71     virtual void updateItemPrimitive( QGraphicsItem* itemToUpdate, int itemIndex ) = 0;

    72     virtual QGraphicsItem* createItemPrimitive( QGraphicsItem *parent ) = 0;

    73 

    74     virtual void scrollPosChanged() = 0;

    75 

    76     void moveAllItemsToPool();

    77 

    78     void populateAndLayout();

    79 

    80     QGraphicsItem* constructItem( int index, bool append );

    81 

    82     QGraphicsItem* getFromPool();

    83 

    84     void returnToPool( QGraphicsItem* item );

    85 

    86     qreal indexToOffset( int index );

    87 

    88     int offsetToIndex( qreal offset );

    89 

    90     void updateItemWithIndex( int index );

    91 

    92     void adjustItems();

    93 

    94 protected: // data

    95 

    96     int                     mAutoScrollTime;

    97 

    98 private: //data

    99 

   100     HbWidget*               mStripContainer;

   101 

   102     QAbstractItemModel*     mModel;

   103 

   104     bool                    mIsCyclic;

   105     bool                    mAutoCenter;

   106 

   107     qreal                   mOverlap;

   108 

   109     QSizeF                  mItemSize;

   110 

   111     QList<QGraphicsItem*>   mItemPool;

   112     QGraphicsWidget*        mItemPoolParent;

   113 

   114     int                     mCurrentIndex;

   115     int                     mPressedIndex;

   116 

   117     qreal                   mStripLength;

   118     qreal                   mContentsLength;

   119 

   120     QList<QGraphicsItem*>   mItemAtSlot;

   121     QList<int>              mIndexAtSlot; // Can be bigger than rowcount if cyclic is used

   122 

   123 };

   124 

   125 

   126 #endif // RADIOSTRIPBASE_H_