/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module 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.
**
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** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QMARGINS_H
#define QMARGINS_H

#include <QtCore/qnamespace.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class QMargins
{
public:
    Q_DECL_CONSTEXPR QMargins();
    Q_DECL_CONSTEXPR QMargins(int left, int top, int right, int bottom);

    Q_DECL_CONSTEXPR bool isNull() const;

    Q_DECL_CONSTEXPR int left() const;
    Q_DECL_CONSTEXPR int top() const;
    Q_DECL_CONSTEXPR int right() const;
    Q_DECL_CONSTEXPR int bottom() const;

    void setLeft(int left);
    void setTop(int top);
    void setRight(int right);
    void setBottom(int bottom);

private:
    int m_left;
    int m_top;
    int m_right;
    int m_bottom;

    friend Q_DECL_CONSTEXPR inline bool operator==(const QMargins &, const QMargins &);
    friend Q_DECL_CONSTEXPR inline bool operator!=(const QMargins &, const QMargins &);
};

Q_DECLARE_TYPEINFO(QMargins, Q_MOVABLE_TYPE);

/*****************************************************************************
  QMargins stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QMargins &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QMargins &);
#endif

/*****************************************************************************
  QMargins inline functions
 *****************************************************************************/

Q_DECL_CONSTEXPR inline QMargins::QMargins() : m_left(0), m_top(0), m_right(0), m_bottom(0) {}

Q_DECL_CONSTEXPR inline QMargins::QMargins(int aleft, int atop, int aright, int abottom)
    : m_left(aleft), m_top(atop), m_right(aright), m_bottom(abottom) {}

Q_DECL_CONSTEXPR inline bool QMargins::isNull() const
{ return m_left==0 && m_top==0 && m_right==0 && m_bottom==0; }

Q_DECL_CONSTEXPR inline int QMargins::left() const
{ return m_left; }

Q_DECL_CONSTEXPR inline int QMargins::top() const
{ return m_top; }

Q_DECL_CONSTEXPR inline int QMargins::right() const
{ return m_right; }

Q_DECL_CONSTEXPR inline int QMargins::bottom() const
{ return m_bottom; }


inline void QMargins::setLeft(int aleft)
{ m_left = aleft; }

inline void QMargins::setTop(int atop)
{ m_top = atop; }

inline void QMargins::setRight(int aright)
{ m_right = aright; }

inline void QMargins::setBottom(int abottom)
{ m_bottom = abottom; }

Q_DECL_CONSTEXPR inline bool operator==(const QMargins &m1, const QMargins &m2)
{
    return
            m1.m_left == m2.m_left &&
            m1.m_top == m2.m_top &&
            m1.m_right == m2.m_right &&
            m1.m_bottom == m2.m_bottom;
}

Q_DECL_CONSTEXPR inline bool operator!=(const QMargins &m1, const QMargins &m2)
{
    return
            m1.m_left != m2.m_left ||
            m1.m_top != m2.m_top ||
            m1.m_right != m2.m_right ||
            m1.m_bottom != m2.m_bottom;
}

#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug, const QMargins &);
#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif // QMARGINS_H