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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef ABSTRACTITEMCONTAINER_H
#define ABSTRACTITEMCONTAINER_H
#include <QModelIndex>
#include "gvbwidget.h"
class QGraphicsWidget;
class AbstractItemView;
class AbstractViewItem;
class AbstractItemContainer : public GvbWidget
{
Q_OBJECT
public:
AbstractItemContainer(int bufferSize, QGraphicsWidget *parent=0);
virtual ~AbstractItemContainer();
virtual void addItem(const QModelIndex &index);
virtual void removeItem(const QModelIndex &index);
virtual void setItemView(AbstractItemView *view);
virtual void setItemPrototype(AbstractViewItem *ptype);
virtual void reset();
virtual int itemCount() const;
virtual AbstractViewItem* itemAt(const int row) const;
AbstractViewItem* findItemByIndex(const QModelIndex &index) const;
AbstractViewItem *prototype();
AbstractViewItem *firstItem();
void updateContent();
void themeChange();
int bufferSize() const;
virtual void setTwoColumns(const bool enabled);
bool twoColumns();
void setSubtreeCacheEnabled(const bool enabled);
virtual void setListItemCaching(const bool enabled, const int index) = 0;
protected:
virtual void adjustVisibleContainerSize(const QSizeF &size) = 0;
virtual void addItemToVisibleLayout(int index, AbstractViewItem *item) = 0;
virtual void removeItemFromVisibleLayout(AbstractViewItem *item) = 0;
virtual bool event(QEvent *e);
virtual bool eventFilter(QObject *obj, QEvent *event);
virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
virtual int maxItemCountInItemBuffer() const;
bool itemVisibleInView(AbstractViewItem* item, const QRectF &viewRect, bool fullyVisible = true) const;
protected:
void updateItemBuffer();
void findFirstAndLastVisibleBufferIndex(int &firstVisibleBufferIndex,
int &lastVisibleBufferIndex,
const QRectF &viewRect,
bool fullyVisible) const;
QList<AbstractViewItem*> m_items;
AbstractItemView *m_itemView;
AbstractViewItem *m_prototype;
int m_bufferSize;
private:
void insertItem(int pos, const QModelIndex &index);
bool m_twoColumns;
Q_DISABLE_COPY(AbstractItemContainer)
};
#endif // ABSTRACTITEMCONTAINER_H
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