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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef ABSTRACTITEMVIEW_H
#define ABSTRACTITEMVIEW_H

#include <QAbstractItemModel>
#include <QGraphicsSceneResizeEvent>
#include <QPersistentModelIndex>
#include <QItemSelection>

#include "listitemcontainer.h"
#include "abstractscrollarea.h"
#include "scroller.h"

class QItemSelectionModel;

class AbstractItemView : public AbstractScrollArea
{
    Q_OBJECT
public:
    AbstractItemView(QGraphicsWidget *parent = 0);
    virtual ~AbstractItemView();
    virtual void setContainer(AbstractItemContainer *container);
    virtual void setModel(QAbstractItemModel *model, AbstractViewItem *prototype);
    virtual QAbstractItemModel* model() const;
    virtual void setItemPrototype(AbstractViewItem* prototype);

    void setSelectionModel(QItemSelectionModel *smodel);

    virtual QModelIndex nextIndex(const QModelIndex &index) const;
    virtual QModelIndex previousIndex(const QModelIndex &index) const;

    virtual int indexCount() const;

    void refreshContainerGeometry(); // TODO Can this be moved to scroll area?

    void updateViewContent();
    virtual void scrollContentsBy(qreal dx, qreal dy);

    virtual bool listItemCaching() const = 0;
    virtual void setListItemCaching(bool enabled) = 0;

protected:
    virtual bool event(QEvent *e);
    void changeTheme();

public slots:
    virtual void setRootIndex(const QModelIndex &index);
    void setCurrentIndex(const QModelIndex &index,
                         QItemSelectionModel::SelectionFlags selectionFlag = QItemSelectionModel::NoUpdate);
protected slots:
    virtual void currentIndexChanged(const QModelIndex &current, const QModelIndex &previous);
    virtual void currentSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
    virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
    virtual void rowsAboutToBeInserted(const QModelIndex &index, int start, int end);
    virtual void rowsInserted(const QModelIndex &parent, int start, int end);
    virtual void rowsAboutToBeRemoved(const QModelIndex &index,int start, int end);
    virtual void rowsRemoved(const QModelIndex &parent,int start, int end);
    virtual void modelDestroyed();
    virtual void layoutChanged();
    virtual void reset();

protected:

    QAbstractItemModel *m_model;
    QPersistentModelIndex m_rootIndex;
    AbstractItemContainer *m_container;
    QItemSelectionModel *m_selectionModel;
    QPersistentModelIndex m_currentIndex;

private:
    Q_DISABLE_COPY(AbstractItemView)
    Scroller m_scroller;
};


#endif // ABSTRACTITEMVIEW_H