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127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
/***************************************************************************
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qgsline.h - description
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A simple line composed of two endpoints
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-------------------
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begin : 2004-10-24
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copyright : (C) 2004 by Gary E.Sherman
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email : sherman at mrcc.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id$ */
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#ifndef QGSLINE_H
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#define QGSLINE_H
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#include <iostream>
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#include <qstring.h>
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#include "qgspoint.h"
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/*! \class QgsLine
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* \brief A simple line object composed of a begin and end point.
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*
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* Comparisons (==, !=) honor the direction of the line. This means that
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* flipped lines with the same coordinates are not considered to be equal.
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*
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* For example, (1,1 2,2) != (2,2 1,1)
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*/
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class QgsLine
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{
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public:
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//! Default constructor
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QgsLine();
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/*! Create a line from two points
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* @param p1 begin point
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* @param p2 end point
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*/
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QgsLine(QgsPoint &p1, QgsPoint &p2);
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//! Destructor
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~QgsLine();
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/*! Sets the begin point of the line
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* @param p1 Beginning point of the line
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*/
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void setBegin(QgsPoint &p1);
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/*! Sets the end point of the line
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* @param p1 End point of the line
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*/
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void setEnd(QgsPoint &p2);
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/*! Get the begin point of the line
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* @return Begin point of the line
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*/
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QgsPoint begin() const;
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/*! Get the end point of the line
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* @return End point of the line
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*/
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QgsPoint end() const;
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//! String representation of the line
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QString stringRep() const;
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//! As above but with precision for string representation of a line
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QString stringRep(int thePrecision) const;
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/*! Return the well known text representation for the line.
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* The wkt is created without an SRID.
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* @return Well known text
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*/
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QString wellKnownText();
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//! Equality operator
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bool operator==(const QgsLine &other);
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//! Inequality operator
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bool operator!=(const QgsLine &other);
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/// Assignment
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QgsLine & operator=(const QgsLine &other);
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private:
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//! Begin point
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QgsPoint mBegin;
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//! End point
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QgsPoint mEnd;
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}; // class QgsLine
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inline bool operator==(const QgsLine &l1, const QgsLine &l2)
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{
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// Note this function assumes that "flipped" lines are not equal,
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// thus preserving the concept of direction
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if((l1.begin() == l2.begin()) && (l1.end() == l2.end()))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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//! Stream operator for writing the line
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inline std::ostream& operator << (std::ostream& os, const QgsLine &l)
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{
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os << l.stringRep();
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return os;
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}
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#endif //QGSLINE_H
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