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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef ABSTRACTSCROLLAREA_H
#define ABSTRACTSCROLLAREA_H
#include "gvbwidget.h"
class ScrollBar;
class QGraphicsGridLayout;
class AbstractScrollArea : public GvbWidget
{
Q_OBJECT
public:
AbstractScrollArea(QGraphicsWidget *parent = 0);
~AbstractScrollArea();
public:
void setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy policy);
void setVerticalScrollBarPolicy(Qt::ScrollBarPolicy policy);
Qt::ScrollBarPolicy verticalScrollBarPolicy() const;
Qt::ScrollBarPolicy horizontalScrollBarPolicy() const;
QGraphicsWidget *viewport() const;
void setViewport(QGraphicsWidget *viewport);
ScrollBar *verticalScrollBar() const;
ScrollBar *horizontalScrollBar() const;
signals:
void viewportChanged(QGraphicsWidget *viewport);
protected:
virtual bool event(QEvent *e);
virtual void scrollContentsBy(qreal dx, qreal dy);
private slots:
void verticalScrollStart();
void verticalScroll(qreal);
void horizontalScrollStart();
void horizontalScroll(qreal);
private:
void adjustScrollBars();
QGraphicsWidget *m_viewport;
ScrollBar *m_horizontalScrollBar;
ScrollBar *m_verticalScrollBar;
Qt::ScrollBarPolicy m_verticalScrollBarPolicy;
Qt::ScrollBarPolicy m_horizontalScrollBarPolicy;
qreal m_prevHorizontalValue;
qreal m_prevVerticalValue;
};
#endif // ABSTRACTSCROLLAREA_H
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