Polygon.h

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//# polygon.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_POLYGON_H_
#define REGION_POLYGON_H_

#include <display/region/Region.qo.h>
#include <display/region/QtRegionSource.qo.h>
#include <casa/BasicSL/String.h>
#include <vector>

namespace casa {

        class AnnotationBase;
        class DisplayData;

        namespace viewer {

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

                class Polygon : public Region {
                public:
                        typedef std::pair<double,double> pt;
                        typedef std::vector<pt> point_list;

                        Polygon( WorldCanvas *wc, QtRegionDock *d, double x1, double y1 );
                        Polygon( WorldCanvas *wc, QtRegionDock *d, const std::vector<std::pair<double,double> > &pts );
                        // carry over from QtRegion... hopefully, removed soon...
                        Polygon( QtRegionSourceKernel *, WorldCanvas *wc,
                                 const std::vector<std::pair<double,double> > &pts,
                                 bool hold_signals=false );
                        Polygon( QtRegionSourceKernel *rs, WorldCanvas *wc, double x1,
                                 double y1, bool hold_signals=false );


                        ~Polygon( ) { }

                        bool clickWithin( double x, double y ) const;
                        int clickHandle( double x, double y ) const;
                        // for rectangles, resizing can change the handle...
                        // for rectangles, moving a handle is resizing...
                        int moveHandle( int handle, double x, double y );
                        void move( double dx, double dy );
                        void resize( double /*width_delta*/, double /*height_delta*/ );
                        bool valid_translation( double dx, double dy, double width_delta, double height_delta );

                        // returns point state (Region::PointLocation)
                        region::PointInfo checkPoint( double x, double y ) const;

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

                        void linearCenter( double &x, double &y ) const;
                        void pixelCenter( double &x, double &y ) const;

                        void closeFigure( bool signal_complete=true );
                        void polygonComplete( );

                        void addVertex( double x, double y, bool rewrite_last_point=false );

                        AnnotationBase *annotation( ) const;

                        // return the *drawing* bounding rectangle...
                        // in "linear" coordinates...
                        void boundingRectangle( double &blcx, double &blcy, double &trcx, double &trcy ) const;

                        int numVertices( ) const {
                                return drawing_points( ).size( );
                        }

                        void output( ds9writer &out ) const;

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

                protected:
                        unsigned int check_handle( double x, double y ) const;

                        enum YScaleTo { ScaleTop, ScaleBottom };
                        enum XScaleTo { ScaleLeft, ScaleRight };
                        enum Tranformations { FLIP_X = 1 << 0, FLIP_Y = 1 << 1 };
                        std::list<std::tr1::shared_ptr<RegionInfo> > *generate_dds_centers( );
                        ImageRegion *get_image_region( DisplayData* ) const;

                        void drawRegion( bool );

                        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;

                        const point_list &drawing_points( ) const {
                                return _drawing_points_;
                        }

                private:
                        bool within_vertex_handle( double x, double y ) const;

                        int move_sizing_rectangle_handle( int handle, double x, double y );
                        int move_vertex( int handle, double x, double y );

                        void update_drawing_bounds_rectangle( );
                        void update_reference_bounds_rectangle( );

                        void update_drawing_state( );
                        void update_reference_state( int transformations, int handle, int new_handle );

                        virtual void setCenter(double &x, double &y, double &deltx, double &delty) {
                                _center_x=x;
                                _center_y=y;
                                _center_delta_x=deltx;
                                _center_delta_y=delty;
                        };

                        double handle_delta_x, handle_delta_y;

                        point_list _ref_points_;
                        double _ref_blc_x_, _ref_blc_y_;
                        double _ref_trc_x_, _ref_trc_y_;
                        double _ref_width_, _ref_height_;

                        point_list _drawing_points_;
                        double _drawing_blc_x_, _drawing_blc_y_;
                        double _drawing_trc_x_, _drawing_trc_y_;
                        double _drawing_width_, _drawing_height_;

                        double _center_x, _center_y;
                        double _center_delta_x, _center_delta_y;

                        XScaleTo _x_origin_;
                        YScaleTo _y_origin_;
                };
        }
}

#endif