DSScreenText.h

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//# DSScreenText : Implementation of a relative screen pos. DSText
//# 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_DSSCREENTEXT_H
#define TRIALDISPLAY_DSSCREENTEXT_H

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

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

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Implementation of a relative screen pos. DSText
// </summary>

class PixelCanvas;
class DSWorldText;
class DSPixelText;
class Record;

class DSScreenText : public DSText , public DisplayShapeWithCoords {
  
public:
  
  DSScreenText();
  DSScreenText(const Record& settings, PixelCanvas* pc);
  DSScreenText(DSPixelText& other, PixelCanvas* pc);
  DSScreenText(DSWorldText& other);
  
  virtual ~DSScreenText();

  virtual void recalculateScreenPosition();
  virtual Bool setOptions(const Record& settings);
  virtual Record getOptions();

  // These are so we can monitor if the text is moved and update our
  // relative position
  virtual void move(const Float& dX, const Float& dY);
  virtual void setCenter(const Float& xPos, const Float& yPos);

  virtual Record getRawOptions() {
    return DSText::getOptions();
  }
private:
  
  PixelCanvas* itsPC;
  Vector<Float> itsRelativeCenter;
  
  virtual Vector<Float> relToScreen(const Vector<Float>& rel);
  virtual Vector<Float> screenToRel(const Vector<Float>& screen);
  virtual void updateRC();
};

} //# NAMESPACE CASA - END

#endif