/*

* Copyright (c) 2010 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 HGWIDGET_P_H

#define HGWIDGET_P_H

#include <hgwidgets/hgwidgets.h>

#include <QTimer>

#include <QTime>

class QAbstractItemModel;

class HgContainer;

class HgScrollBufferManager;

class QGraphicsLinearLayout;

class HgIndexFeedback;

class HgWidgetPrivate

{

    Q_DECLARE_PUBLIC(HgWidget)

public:

    HgWidgetPrivate();

    virtual ~HgWidgetPrivate();

    void init(HgContainer *container);

    void setModel(QAbstractItemModel *model);

    void setSelectionModel(QItemSelectionModel *selectionModel);

    QItemSelectionModel *selectionModel() const;

    void setSelectionMode(HgWidget::SelectionMode mode, bool resetSelection);

    HgWidget::SelectionMode selectionMode() const;

    void selectAll();

    void clearSelection();

    QModelIndex currentIndex() const;

    void setCurrentIndex(const QModelIndex &index,

        QItemSelectionModel::SelectionFlags selectionFlag=QItemSelectionModel::NoUpdate);

    void scrollTo(const QModelIndex &index);

    bool getItemOutline(const QModelIndex& index, QPolygonF& points);

    void aboutToChangeOrientation();

    virtual void orientationChanged(Qt::Orientation orientation);

    QList<QModelIndex> getVisibleItemIndices() const;

    Qt::Orientation scrollDirection() const;

    void setIndexFeedbackPolicy( HgWidget::IndexFeedbackPolicy policy);

    HgWidget::IndexFeedbackPolicy indexFeedbackPolicy() const;

    void setDefaultImage(QImage defaultImage);

    void setItemSizePolicy(HgWidget::ItemSizePolicy policy);

    HgWidget::ItemSizePolicy itemSizePolicy() const;

    void setItemSize(const QSizeF& size);

    QSizeF itemSize() const;

    void setItemSpacing(const QSizeF& size);

    QSizeF itemSpacing() const;

    void setHandleLongPress(bool handleLongPress);

    bool handleLongPress() const;

    virtual void handleThemeChanged();

    HgWidget *q_ptr;

private:

    void clearCurrentModel();

    void initializeNewModel();

    void adjustGeometry();

    void createScrollBar(Qt::Orientation orientation);

    void setScrollBarPolicy(HgWidget::ScrollBarPolicy policy);

    void replaceScrollBar(HbScrollBar *scrollBar);

    virtual void updateScrollMetrics( qreal pos = 0 );

    void prepareScrollBars( qreal pos = 0);

    virtual void updateScrollBar(qreal pos = 0);

    void displayScrollBar(qreal pos = 0);

    void setScrollBarMetrics(qreal pos = 0);

    void lostForeground();

    void gainedForeground();

    virtual void updateCurrentItem(const QModelIndex &currentItem);

    // private slot functions

    void _q_scrollPositionChanged(qreal index, bool scrollBarAnimation);

    void _q_releaseItems( int releaseStart, int releaseEnd );

    void _q_requestItems( int requestStart, int requestEnd );

    void _q_hideScrollBars();

    void _q_thumbPositionChanged(qreal value, Qt::Orientation orientation);

    void _q_insertRows(const QModelIndex &parent, int start, int end);

    void _q_removeRows(const QModelIndex &parent, int start, int end);

    void _q_moveRows(const QModelIndex &sourceParent, int sourceStart,

                     int sourceEnd, const QModelIndex &destinationParent,

                     int destinationRow);

    void _q_modelReset();

    void _q_groovePressed(qreal value, Qt::Orientation orientation);

    void _q_updateCurrentItem(const QModelIndex &current, const QModelIndex &previous);

    void _q_themeChanged();

    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);

    void initBufferManager(int itemCount);

protected:

    HgContainer *mContainer;

    HgScrollBufferManager *mBufferManager;

    QAbstractItemModel *mModel;

    QItemSelectionModel *mDefaultSelectionModel;

    HbScrollBar *mScrollBar;

    HgWidget::ScrollBarPolicy mScrollBarPolicy;

    bool mAbleToScroll;

    QTimer* mScrollBarHideTimer;

    bool mHandleLongPress;

    bool mForeground;

    int mBufferSize;

    bool mStaticScrollDirection;

};

#endif  //HGWIDGET_p_H