DDDRectangle.h

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//# DDDRectangle.h: implementation of rectangular DDDObject
//# Copyright (C) 1999,2000,2002
//# 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_DDDRECTANGLE_H
#define TRIALDISPLAY_DDDRECTANGLE_H

#include <casa/aips.h>
#include <casa/Arrays/Vector.h>
#include <casa/Containers/Record.h>
#include <display/DisplayDatas/DDDObject.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Implementation of a rectangular object for DrawingDisplayData class.
// </summary>

// <synopsis>
// This class implements the interface defined by DDDObject, to provide
// a rectangle object for registration with DrawingDisplayData objects.
// </synopsis>

class DDDRectangle : public DDDObject {

 public:

  // Constructor taking a Record description.  Fields in the record,
  // on top of what is consumed by the DDDObject constructor, are:
  // <src>blc</src> and <src>trc</src>.
  DDDRectangle(const Record &description, DrawingDisplayData *owner);

  // Destructor.
  virtual ~DDDRectangle();

  
  // Draw this rectangle object for the given reason on the provided
  // WorldCanvas.
  virtual void draw(const Display::RefreshReason &reason, 
                    WorldCanvas *worldcanvas);
  
  // Return a record describing this object.
  virtual Record description();

  // Update this object based on the information in the provided
  // Record.
  virtual void setDescription(const Record &rec);
  
  // Event handlers.  The parent DrawingDisplayData will distribute
  // events as necessary to the various DDDObjects which comprise it.
  // <group>
  virtual void operator()(const WCRefreshEvent &/*ev*/) {;};
  virtual void operator()(const WCPositionEvent &ev);
  virtual void operator()(const WCMotionEvent &ev);
  // </group>

 protected:

  // (Required) default constructor.
  DDDRectangle();

  // (Required) copy constructor.
  DDDRectangle(const DDDRectangle &other);

  // (Required) copy assignment.
  void operator=(const DDDRectangle &other);
  
 private:

  // Blc and trc of rectangle in world coordinates.
  Vector<Double> itsBlc, itsTrc;

  // Handle coordinates.
  Vector<Int> itsHX, itsHY;

  // Mode.
  DDDObject::Mode itsMode;

  // Store for movement bases.
  Int itsBaseMoveX, itsBaseMoveY;

  // is it a left handle?  a bottom handle?
  Bool itsLeftHandle, itsBottomHandle;

};


} //# NAMESPACE CASA - END

#endif