source: trunk/src/corelib/tools/qline.h@ 805

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the QtCore module of the Qt Toolkit.
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** 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
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** 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
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#ifndef QLINE_H
#define QLINE_H

#include <QtCore/qpoint.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

/*******************************************************************************
 * class QLine
 *******************************************************************************/

class Q_CORE_EXPORT QLine
{
public:
    inline QLine();
    inline QLine(const QPoint &pt1, const QPoint &pt2);
    inline QLine(int x1, int y1, int x2, int y2);

    inline bool isNull() const;

    inline QPoint p1() const;
    inline QPoint p2() const;

    inline int x1() const;
    inline int y1() const;

    inline int x2() const;
    inline int y2() const;

    inline int dx() const;
    inline int dy() const;

    inline void translate(const QPoint &p);
    inline void translate(int dx, int dy);

    inline QLine translated(const QPoint &p) const;
    inline QLine translated(int dx, int dy) const;

    inline void setP1(const QPoint &p1);
    inline void setP2(const QPoint &p2);
    inline void setPoints(const QPoint &p1, const QPoint &p2);
    inline void setLine(int x1, int y1, int x2, int y2);

    inline bool operator==(const QLine &d) const;
    inline bool operator!=(const QLine &d) const { return !(*this == d); }

private:
    QPoint pt1, pt2;
};
Q_DECLARE_TYPEINFO(QLine, Q_MOVABLE_TYPE);

/*******************************************************************************
 * class QLine inline members
 *******************************************************************************/

inline QLine::QLine() { }

inline QLine::QLine(const QPoint &pt1_, const QPoint &pt2_) : pt1(pt1_), pt2(pt2_) { }

inline QLine::QLine(int x1pos, int y1pos, int x2pos, int y2pos) : pt1(QPoint(x1pos, y1pos)), pt2(QPoint(x2pos, y2pos)) { }

inline bool QLine::isNull() const
{
    return pt1 == pt2;
}

inline int QLine::x1() const
{
    return pt1.x();
}

inline int QLine::y1() const
{
    return pt1.y();
}

inline int QLine::x2() const
{
    return pt2.x();
}

inline int QLine::y2() const
{
    return pt2.y();
}

inline QPoint QLine::p1() const
{
    return pt1;
}

inline QPoint QLine::p2() const
{
    return pt2;
}

inline int QLine::dx() const
{
    return pt2.x() - pt1.x();
}

inline int QLine::dy() const
{
    return pt2.y() - pt1.y();
}

inline void QLine::translate(const QPoint &point)
{
    pt1 += point;
    pt2 += point;
}

inline void QLine::translate(int adx, int ady)
{
    this->translate(QPoint(adx, ady));
}

inline QLine QLine::translated(const QPoint &p) const
{
    return QLine(pt1 + p, pt2 + p);
}

inline QLine QLine::translated(int adx, int ady) const
{
    return translated(QPoint(adx, ady));
}

inline void QLine::setP1(const QPoint &aP1)
{
    pt1 = aP1;
}

inline void QLine::setP2(const QPoint &aP2)
{
    pt2 = aP2;
}

inline void QLine::setPoints(const QPoint &aP1, const QPoint &aP2)
{
    pt1 = aP1;
    pt2 = aP2;
}

inline void QLine::setLine(int aX1, int aY1, int aX2, int aY2)
{
    pt1 = QPoint(aX1, aY1);
    pt2 = QPoint(aX2, aY2);
}

inline bool QLine::operator==(const QLine &d) const
{
    return pt1 == d.pt1 && pt2 == d.pt2;
}

#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug d, const QLine &p);
#endif

#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QLine &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QLine &);
#endif

/*******************************************************************************
 * class QLineF