/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbWidgets module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#ifndef HBGRIDITEMCONTAINER_P_P_H

#define HBGRIDITEMCONTAINER_P_P_H

#include <hbabstractitemcontainer_p_p.h>

#include <hbgriditemcontainer_p.h>

#include <hbapplication.h>

#include <QPair>

class HbGridLayout;

class HbGridItemContainer;

class HbGridItemContainerPrivate: public HbAbstractItemContainerPrivate

{

    Q_DECLARE_PUBLIC(HbGridItemContainer)

public:

    HbGridItemContainerPrivate();

    virtual ~HbGridItemContainerPrivate();

    void init();

    qreal getDiffWithoutScrollareaCompensation(const QPointF &delta) const;

    qreal recycling(qreal diff);

    qreal farRecycling(const QPointF &delta);

    HbAbstractViewItem *shiftDownItem(bool doEvenBadIndex, bool animate);

    bool shiftDownItem(int pos, bool animate);

    HbAbstractViewItem *shiftDown(bool animate);

    HbAbstractViewItem *shiftUpItem(bool animate);

    HbAbstractViewItem *shiftUp(bool animate);

    void resetBuffer();

    inline qreal getScrollDirectionItemSize();

    void removeItem(const QModelIndex &index, bool animate);

    void scrollToEnsureVisible(const QModelIndex &index);

    void scrollToPositionAtTop(const QModelIndex &index);

    void scrollToPositionAtBottom(const QModelIndex &index);

    void scrollToPositionAtCenter(const QModelIndex &index);

    QModelIndex lastValidItemIndex() const;

    void updateItemBuffer();

    void updateItemBufferContent(int targetCount, const QModelIndex &indexInTheCenter);

    void decreaseBufferSize(int targetCount, int startingIndex);

    void increaseBufferSize(int targetCount, int startingIndex);

    void alignBufferContent(int startingIndex);

    int alignIndexToClosestFirstInRow(int index);

    int mapToLayoutIndex(int index) const;

    HbGridLayout *mLayout;

    mutable int mMinCount;

    mutable int mRowCount;

    mutable int mColumnCount;

    mutable int mItemsPerRow;

    Qt::Orientations mScrollDirection;

    // used by updateItemBuffer to obtain what change and what kind of update is needed

    int mOldItemsPerRow;

    QList< QPair<HbAbstractViewItem *, int> > mAnimatedItems;

};

qreal HbGridItemContainerPrivate::getScrollDirectionItemSize()

{

    // return item size depending on scrolling direction

    return (mScrollDirection == Qt::Vertical) ?

        mLayout->effectiveSizeHint(Qt::MinimumSize).height() 

        : mLayout->effectiveSizeHint(Qt::MinimumSize).width();

}

#endif /*HBGRIDITEMCONTAINER_P_P_H*/