GisGeometry.h

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#ifndef GisGeometry_h
#define GisGeometry_h

// GEOSGeometry, GEOSPreparedGeometry types
#include <geos_c.h>

// Qt library
#include <QMetaType>
#include <QSharedPointer>

class QString;

namespace Isis {

  class Cube;
  class GisGeometry {
  
    public:
      enum Type { 
          None,     
          WKT,      
          WKB,      
          IsisCube, 
          GeosGis   
      };

      GisGeometry();
      GisGeometry(const double xlongitude, const double ylatitude);
      GisGeometry(Cube &cube);
      GisGeometry(const QString &gisSource, const Type t);
      GisGeometry(const GisGeometry &geom);
      GisGeometry(GEOSGeometry *geom);
      GisGeometry &operator=(GisGeometry const &geom);
      virtual ~GisGeometry();
  
      void setGeometry(GEOSGeometry *geom);
      
      bool isDefined() const;
      bool isValid() const;
      QString isValidReason() const;
      bool isEmpty() const;
      Type type() const;
      static Type type(const QString &gtype);
      static QString typeToString(const Type &type);
  
      const GEOSGeometry *geometry() const;
      const GEOSPreparedGeometry *preparedGeometry() const;
  
      GisGeometry *clone() const;
  
      // Useful operations
      double area() const;
      double length() const;
      double distance(const GisGeometry &target) const;
      int    points() const;
  
      bool intersects(const GisGeometry &target) const;
      bool contains(const GisGeometry &target) const;
      bool disjoint(const GisGeometry &target) const;
      bool overlaps(const GisGeometry &target) const;
      bool equals(const GisGeometry &target) const;
  
      double intersectRatio(const GisGeometry &geom) const;
  
      GisGeometry *envelope( ) const;
      GisGeometry *convexHull( ) const;
      GisGeometry *simplify(const double &tolerance) const;
  
      GisGeometry *intersection(const GisGeometry &geom) const;
      GisGeometry *g_union(const GisGeometry &geom) const;
  
      GisGeometry *centroid() const;
      bool centroid(double &xlongitude, double &ylatitude) const;
  
    private:
      GEOSGeometry *makePoint(const double x, const double y) const;
      GEOSGeometry *fromCube(Cube &cube) const;
      GEOSPreparedGeometry const *makePrepared(const GEOSGeometry *geom) const;
      void destroy();

      Type                 m_type;  
      GEOSGeometry         *m_geom; 
      GEOSPreparedGeometry const *m_preparedGeom; 
  
  };

  typedef QSharedPointer<GisGeometry> SharedGisGeometry;

} // Namespace Isis

// Declaration so this type can be used in Qt's QVariant class
Q_DECLARE_METATYPE(Isis::SharedGisGeometry);

#endif