/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 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, 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.
**
** 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QWINDOWSURFACE_P_H
#define QWINDOWSURFACE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/qwidget.h>

QT_BEGIN_NAMESPACE

class QPaintDevice;
class QRegion;
class QRect;
class QPoint;
class QImage;
class QWindowSurfacePrivate;

class Q_GUI_EXPORT QWindowSurface
{
public:
    QWindowSurface(QWidget *window);
    virtual ~QWindowSurface();

    QWidget *window() const;

    virtual QPaintDevice *paintDevice() = 0;
    virtual void flush(QWidget *widget, const QRegion &region,
                       const QPoint &offset) = 0;
    virtual void setGeometry(const QRect &rect);
    QRect geometry() const;

    virtual bool scroll(const QRegion &area, int dx, int dy);

    virtual void beginPaint(const QRegion &);
    virtual void endPaint(const QRegion &);

    virtual QImage* buffer(const QWidget *widget);
    virtual QPixmap grabWidget(const QWidget *widget, const QRect& rectangle = QRect()) const;

    virtual QPoint offset(const QWidget *widget) const;
    inline QRect rect(const QWidget *widget) const;

    bool hasStaticContentsSupport() const;

    void setStaticContents(const QRegion &region);
    QRegion staticContents() const;

protected:
    bool hasStaticContents() const;
    void setStaticContentsSupport(bool enable);

private:
    QWindowSurfacePrivate *d_ptr;
};

inline QRect QWindowSurface::rect(const QWidget *widget) const
{
    return widget->rect().translated(offset(widget));
}

QT_END_NAMESPACE

#endif // QWINDOWSURFACE_P_H