Ellipse.h

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//# ellipse.h: base class for statistical regions
//# Copyright (C) 2011
//# 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 REGION_ELLIPSE_H_
#define REGION_ELLIPSE_H_

#include <display/region/Rectangle.h>
#include <casa/BasicSL/String.h>
#include <list>

namespace casa {

        class PanelDisplay;
        class AnnRegion;

        namespace viewer {

                // carry over from QtRegion... hopefully, removed soon...
                class QtRegionSourceKernel;

                // All regions are specified in "linear coordinates", not "pixel coordinates". This is necessary
                // because "linear coordinates" scale with zooming whereas "pixel coordinates" do not. Unfortunately,
                // this means that coordinate transformation is required each time the region is drawn.
                class Ellipse : public Rectangle {
                public:
                        ~Ellipse( );
                        Ellipse( WorldCanvas *wc, QtRegionDock *d, double x1, double y1, double x2, double y2);

                        // carry over from QtRegion... hopefully, removed soon...
                        Ellipse( QtRegionSourceKernel *factory, WorldCanvas *wc, double x1, double y1, double x2, double y2, bool hold_signals=false );

                        // returns mouse movement state
                        unsigned int mouseMovement( double x, double y, bool other_selected );

                        AnnotationBase *annotation( ) const;

                        bool flag( MSAsRaster * ) {
                                return false;
                        }

                        // fetch region type...
                        region::RegionTypes type( ) const {
                                return region::EllipseRegion;
                        }

                protected:
                        std::list<SHARED_PTR<RegionInfo> > *generate_dds_centers(  );
                        ImageRegion *get_image_region( DisplayData* ) const;
                        // Ellipse is derived from Rectangle, but we have no way to generate ellipse
                        // statistics for a measurement set (our only non-image display data)... so
                        // we have to define this to prevent MS info being reported for the bounding
                        // rectangle of an Ellipse...
                        void generate_nonimage_statistics( DisplayData*, std::list<RegionInfo> * ) { }

                        virtual void fetch_region_details( region::RegionTypes &type, std::vector<std::pair<int,int> > &pixel_pts,
                                                           std::vector<std::pair<double,double> > &world_pts ) const;

                        void drawRegion( bool );
                        /* void drawHandles( ); */

                private:
                        std::pair<Vector<Quantity>,Vector<Quantity> > posAndRadii( ) const;
                        bool output_region( ds9writer &out, WorldCanvas *wc, const std::vector<std::pair<double,double> > &pts ) const;

                };
        }
}

#endif