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Txq2dLineSeg.h

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//---------------------------------------------------------------------------
//
// File:    Txq2dLineSeg.h
//
// Purpose: Draw a line segment on the Txq2dCanvas

// Version: $Id: Txq2dLineSeg.h,v 1.5 2002/01/17 19:29:21 kgl Exp $
//
// Author:  Kelly G. Luetkemeyer
//
//  modifed from the Txq2dLineSeg.java class:
// Project: Tech-X Foundation Classes
//          David A. Alexander, Svetlana G. Shasharina, John R. Cary
//          Copyright (C) 1998-2000 Tech-X Corporation. All Rights Reserved.
//---------------------------------------------------------------------------


#ifndef TXQ2D_LINESEG_H
#define TXQ2D_LINESEG_H

// std includes
#include <cmath>
#include <cfloat>

// Tx includes
#include "Txq2dSeg.h"

class Txq2dLineSeg: public Txq2dSeg { 

public:

  Txq2dLineSeg();


  Txq2dLineSeg(int x1, int y1, int x2, int y2);
 
  Txq2dLineSeg(QPoint p1, QPoint p2);
 
  Txq2dLineSeg(TxqDoublePoint p1, TxqDoublePoint p2);
 
  Txq2dLineSeg(double x1, double y1, double x2, double y2);

 virtual ~Txq2dLineSeg();

  void calculateParameters();

  void setBoundsToPoints();

  void setPoints(int x1, int y1, int x2, int y2); 

  void setPoints(QPoint p1, QPoint p2); 

  void setPoints(TxqDoublePoint p1, TxqDoublePoint p2); 

  void setPoints(double x1, double y1, double x2, double y2);

  void setStartPoint(TxqDoublePoint sp); 

  void setStartPoint(int x, int y); 

  void setEndPoint(TxqDoublePoint ep); 

  void setEndPoint(int x, int y);

  void setPointAndAngle(TxqDoublePoint sp, double myAngle); 

  void stretchToMax(); 

  void setAngle(double myAngle); 


  void setSlope(double m); 

  double getSlope(); 

  void setIntercept(double b); 

  double getIntercept(); 

  int findY(int x); 

  double findY(double x);

  int findX(int y) ;
  
  double findX(double y);

  TxqDoublePoint intersection(TxqDoublePoint p, double m); 
    
  TxqDoublePoint intersection(Txq2dLineSeg segline); 

  QPoint getPointAtPosition(int pixels); 

  bool inBetweenEnds(TxqDoublePoint p); 

  bool onLineSegment(TxqDoublePoint p); 

  void findCenterFromBounds(); 


  void paint(QPainter* g ); 

  void dump(QTextStream *ts);

protected:

 virtual void initialize();

private:

// Class data members

  double slope;

  double intercept;

  static const double MAX_SIZE;

  int numPoints;
};

#endif

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