DSScreenArrow.h

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//# DSScreenArrow.h : Implementation of a relative screen pos DSArrow
//# Copyright (C) 1998,1999,2000,2001,2002
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
//#                        520 Edgemont Road
//#                        Charlottesville, VA 22903-2475 USA
//#
//# $Id: 

#ifndef TRIALDISPLAY_DSSCREENARROW_H
#define TRIALDISPLAY_DSSCREENARROW_H

#include <casa/aips.h>
#include <casa/Arrays/Vector.h> 
#include <casa/Arrays/Matrix.h>

#include <casa/Quanta/Quantum.h>
#include <casa/Quanta/QuantumHolder.h>
#include <display/Display/PanelDisplay.h>

#include <display/DisplayShapes/DSArrow.h>
#include <display/DisplayShapes/DisplayShapeWithCoords.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Implementation of a relative screen pos DSArrow
// </summary>

class PixelCanvas;
class DSPixelArrow;
class DSWorldArrow;

class DSScreenArrow : public DSArrow , public DisplayShapeWithCoords{

public:

  DSScreenArrow();
  DSScreenArrow(const Record& settings, PixelCanvas* pc);
  DSScreenArrow(DSPixelArrow& other, PixelCanvas* pc);
  DSScreenArrow(DSWorldArrow& other);

  virtual ~DSScreenArrow();
  
  virtual void recalculateScreenPosition();
  
  // So we can update our Screen pos (relative)
  // <group>
  virtual void move(const Float& dX, const Float& dY);
  virtual void setCenter(const Float& xPos, const Float& yPos);
  virtual void rotate(const Float& angle);
  virtual void scale(const Float& scaleFactor);
  virtual void setStartPoint(const Vector<Float>& startPoint);
  virtual void setEndPoint(const Vector<Float>& endPoint);
  virtual void changePoint(const Vector<Float>&pos, const Int n);
  virtual void changePoint(const Vector<Float>& pos);
  // </group>

  virtual Bool setOptions(const Record& settings);
  virtual Record getOptions();
  
  virtual Record getRawOptions() {
    return DSArrow::getOptions();
  }
  
private:

  // The pixelcanvas we are using
  PixelCanvas* itsPC;

  // The center of the marker in world co-ords.
  Vector<Float> itsRelativeStart;
  Vector<Float> itsRelativeEnd;
  
  void updateRelative();
};

} //# NAMESPACE CASA - END

#endif