/*

* 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 RADIOSTRIPBASE_H_

#define RADIOSTRIPBASE_H_

// System includes

#include <HbScrollArea>

// Forward declarations

class HbWidget;

class QAbstractItemModel;

// Class declaration

class RadioStripBase : public HbScrollArea

{

    Q_OBJECT

    Q_PROPERTY( int autoScrollTime READ autoScrollTime WRITE setAutoScrollTime )

public:

    virtual ~RadioStripBase();

    void setAutoScrollTime( const int time );

    int autoScrollTime() const;

    void setModel( QAbstractItemModel* model );

    QAbstractItemModel* model() const;

    void setCyclic( bool isCyclic );

    void setSpacing( qreal spacing );

    void setAutoCenter( bool autoCenter );

    void setItemSize( const QSizeF& size );

    void setIndex( int index, bool animateToCenter );

protected:

// from base class QGraphicsWidget

    void resizeEvent( QGraphicsSceneResizeEvent* event );

// from base class QGraphicsItem

    void mousePressEvent( QGraphicsSceneMouseEvent* event );

    void mouseReleaseEvent( QGraphicsSceneMouseEvent* event );

private slots:

    void scrollPositionChanged( QPointF newPosition );

private:

    Q_DISABLE_COPY( RadioStripBase )

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

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

    void moveAllItemsToPool();

    void populateAndLayout();

    QGraphicsItem* constructItem( int index, bool append );

    QGraphicsItem* getFromPool();

    void returnToPool( QGraphicsItem* item );

    qreal indexToOffset( int index );

    int offsetToIndex( qreal offset );

    void updateItemWithIndex( int index );

    void adjustItems();

protected: // data

    int                     mAutoScrollTime;

private: //data

    HbWidget*               mStripContainer;

    QAbstractItemModel*     mModel;

    bool                    mIsCyclic;

    bool                    mAutoCenter;

    qreal                   mSpacing;

    QSizeF                  mItemSize;

    QList<QGraphicsItem*>   mItemPool;

    QGraphicsWidget*        mItemPoolParent;

    int                     mCurrentIndex;

    int                     mPressedIndex;

    qreal                   mStripLength;

    qreal                   mContentsLength;

    QList<QGraphicsItem*>   mItemAtSlot;

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

};

#endif // RADIOSTRIPBASE_H_