/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef QLINE_H#define QLINE_H#include <QtCore/qpoint.h>QT_BEGIN_HEADERQT_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 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 bool QLine::operator==(const QLine &d) const{    return pt1 == d.pt1 && pt2 == d.pt2;}#ifndef QT_NO_DEBUG_STREAMQ_CORE_EXPORT QDebug operator<<(QDebug d, const QLine &p);#endif#ifndef QT_NO_DATASTREAMQ_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QLine &);Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QLine &);#endif/******************************************************************************* * class QLineF *******************************************************************************/class Q_CORE_EXPORT QLineF {public:    enum IntersectType { NoIntersection, BoundedIntersection, UnboundedIntersection };    inline QLineF();    inline QLineF(const QPointF &pt1, const QPointF &pt2);    inline QLineF(qreal x1, qreal y1, qreal x2, qreal y2);    inline QLineF(const QLine &line) : pt1(line.p1()), pt2(line.p2()) { }    bool isNull() const;    inline QPointF p1() const;    inline QPointF p2() const;    inline qreal x1() const;    inline qreal y1() const;    inline qreal x2() const;    inline qreal y2() const;    inline qreal dx() const;    inline qreal dy() const;    qreal length() const;    void setLength(qreal len);    QLineF unitVector() const;    QLineF normalVector() const;    // ### Qt 5: rename intersects() or intersection() and rename IntersectType IntersectionType    IntersectType intersect(const QLineF &l, QPointF *intersectionPoint) const;    qreal angle(const QLineF &l) const;    QPointF pointAt(qreal t) const;    inline void translate(const QPointF &p);    inline void translate(qreal dx, qreal dy);    inline bool operator==(const QLineF &d) const;    inline bool operator!=(const QLineF &d) const { return !(*this == d); }    QLine toLine() const;private:    QPointF pt1, pt2;};Q_DECLARE_TYPEINFO(QLineF, Q_MOVABLE_TYPE);/******************************************************************************* * class QLineF inline members *******************************************************************************/inline QLineF::QLineF(){}inline QLineF::QLineF(const QPointF &apt1, const QPointF &apt2)    : pt1(apt1), pt2(apt2){}inline QLineF::QLineF(qreal x1pos, qreal y1pos, qreal x2pos, qreal y2pos)    : pt1(x1pos, y1pos), pt2(x2pos, y2pos){}inline qreal QLineF::x1() const{    return pt1.x();}inline qreal QLineF::y1() const{    return pt1.y();}inline qreal QLineF::x2() const{    return pt2.x();}inline qreal QLineF::y2() const{    return pt2.y();}inline QPointF QLineF::p1() const{    return pt1;}inline QPointF QLineF::p2() const{    return pt2;}inline qreal QLineF::dx() const{    return pt2.x() - pt1.x();}inline qreal QLineF::dy() const{    return pt2.y() - pt1.y();}inline QLineF QLineF::normalVector() const{    return QLineF(p1(), p1() + QPointF(dy(), -dx()));}inline void QLineF::translate(const QPointF &point){    pt1 += point;    pt2 += point;}inline void QLineF::translate(qreal adx, qreal ady){    this->translate(QPointF(adx, ady));}inline void QLineF::setLength(qreal len){    if (isNull())        return;    QLineF v = unitVector();    pt2 = QPointF(pt1.x() + v.dx() * len, pt1.y() + v.dy() * len);}inline QPointF QLineF::pointAt(qreal t) const{    qreal vx = pt2.x() - pt1.x();    qreal vy = pt2.y() - pt1.y();    return QPointF(pt1.x() + vx * t, pt1.y() + vy * t);}inline QLine QLineF::toLine() const{    return QLine(pt1.toPoint(), pt2.toPoint());}inline bool QLineF::operator==(const QLineF &d) const{    return pt1 == d.pt1 && pt2 == d.pt2;}#ifndef QT_NO_DEBUG_STREAMQ_CORE_EXPORT QDebug operator<<(QDebug d, const QLineF &p);#endif#ifndef QT_NO_DATASTREAMQ_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QLineF &);Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QLineF &);#endifQT_END_HEADER#endif // QLINE_H