---

TxqViewPort.h

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//--------------------------------------------------------------------
//
// File:    TxqViewPort.h
//
// Purpose: Interface class to define the pixel to XY coordinate 
//          transformations and scale
//
// Version: $Id: TxqViewPort.h,v 1.14 2001/10/12 18:51:23 kgl Exp $
//
// Author:  Kelly G. Luetkemeyer
//
// Copyright (c) 2000 by Tech-X Corporation.  All rights reserved.
//---------------------------------------------------------------------------

#ifndef TXQ_VIEWPORT_H
#define TXQ_VIEWPORT_H

// system includes
#if defined(_MSC_VER)
#include <limits>
#else
#include <limits.h>
#endif

// Qt includes
#include <qpoint.h>
#include <qrect.h>

class TxqViewPort 
{

public:

  TxqViewPort();

  virtual double getXmin(); 
 
  virtual double getXmax(); 
 
  virtual double getYmin(); 
 
  virtual double getYmax(); 
 
  virtual double pixelToX( const QPoint & p)=0;
 
  virtual double pixelToY( const QPoint & p)=0;
 
  virtual QPoint xyToPixel( double x, double y );
 
  virtual short xToPixel( double x )=0;
 
  virtual short yToPixel( double y )=0;

  virtual void setXmin(double val)=0; 
 
  virtual void setXmax(double val)=0; 
 
  virtual void setYmin(double val)=0; 
 
  virtual void setYmax(double val)=0; 
 
   virtual void setBounds(double plxmin, double plymin, 
                  double plxmax, double plymax,
                  int cwidth,     int cheight ); 

   virtual void setBounds(double plxmin, double plymin,
                  double plxmax, double plymax,
                  int transx,     int transy,
                  int cwidth,     int cheight ); 
   virtual void setBounds(double plxmin, double plymin,
                  double plxmax, double plymax ); 

   virtual void setPlotRegion( int transx, int transy,
                      int cwidth, int cheight ); 

  virtual QRect getPlotRegion();

  virtual int width(); 

  virtual int getWidth(); 

  virtual int height(); 

  virtual int getHeight(); 

   virtual void setScreenCoordinates(bool b);
 
   virtual bool isScreenCoordinates();

 virtual ~TxqViewPort();

protected:

  double xmin;
  double xmax;
  double ymin;
  double ymax;

   int xwidth;

   int  yheight;

  QRect plotRect;

  bool scFlag;

private:


};
#endif

Copyright Tech-X Corporation, all rights reserved.