Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 Instituto de Desarrollo Regional and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)

 *   Campus Universitario s/n

 *   02071 Alabacete

 *   Spain

 *

 *   +34 967 599 200

 */

package org.gvsig.crs;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IDatum;

import org.cresques.cts.IProjection;

import org.cresques.geo.ViewPortData;

import org.gvsig.crs.proj.CrsProj;

import org.gvsig.crs.proj.CrsProjException;

import org.gvsig.crs.proj.JNIBaseCrs;

import org.gvsig.crs.proj.OperationCrsException;

import org.idr.geotools.metadata.iso.citation.Citations;

import org.idr.geotools.referencing.crs.AbstractDerivedCRS;

import org.idr.geotools.referencing.crs.AbstractSingleCRS;

import org.idr.geotools.referencing.datum.DefaultGeodeticDatum;

import org.opengis.referencing.crs.CoordinateReferenceSystem;

/**

 * Clase que representa un CRS basado en GeoTools/GeoApi.

 * 

 * @author Diego Guerrero Sevilla (diego.guerrero@uclm.es)

 *

 */

public class CrsGT implements ICrs {

        private static final Color basicGridColor = new Color(64, 64, 64, 128);

        /**

         * CRS GeoApi. Nucleo de la clare CrsGT.

         */

        private CoordinateReferenceSystem         crsGT                        = null;

        private boolean                                         targetNad                 = false;

        /**

         *Cadena proj4

         */

        private String                                                 proj4                         = null;

        private Color                                                 gridColor                 = basicGridColor;

        /**

         * Par?metro nadgrid para proj4.

         */

        private String                                                 nad                                = null;

        /**

         * CRS operable con proj4.

         */

        private CrsProj                                         crsProj                        = null;

        /**

         * CRS Base operable con proj4.

         */

        private CrsProj                                         crsProjBase                = null;

        /**

         * Provisional, hasta que se elimine getCrsWkt de ICrs.

         */

        private CrsWkt                                                 crsWkt                        = null;

        /**

         * Constructor a partir de un CoordinateReferenceSystem

         * 

         * @param crsGT

         * @throws CrsProjException 

         */

        public CrsGT(CoordinateReferenceSystem crsGT){

                this.crsGT = crsGT;

                Proj4 proj4;

                try {

                        proj4 = new Proj4();

                        crsProj = new CrsProj(proj4.exportToProj4(crsGT));

                        if (crsGT instanceof AbstractDerivedCRS){

                                AbstractDerivedCRS derivedCRS = (AbstractDerivedCRS)crsGT;

                                crsProjBase = new CrsProj(proj4.exportToProj4(derivedCRS.getBaseCRS()));

                        }

                } catch (CrsException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                crsWkt = new CrsWkt(crsGT);

        }

        public int getCode() {

                return Integer.valueOf(getAbrev().split(":")[1]).intValue();

        }

        public CrsWkt getCrsWkt() {

                return crsWkt;

        }

        public String getWKT() {

                return crsGT.toWKT();

        }

        public void setNadGrid(String nad) {

                this.nad = nad;

        }

        public void setNadInTarget(boolean targetNad) {

                // TODO Auto-generated method stub

        }

        public Point2D createPoint(double x, double y) {

                // TODO Auto-generated method stub

                return null;

        }

        public void drawGrid(Graphics2D g, ViewPortData vp) {

                // TODO Auto-generated method stub

        }

        public Point2D fromGeo(Point2D gPt, Point2D mPt) {

                // TODO Auto-generated method stub

                return null;

        }

        public String getAbrev() {

                AbstractSingleCRS crs = (AbstractSingleCRS)crsGT;

                String authority = crs.getName().toString().split(":")[0];

                return ((AbstractSingleCRS)crsGT).getIdentifier(Citations.fromName(authority)).toString();

        }

        public ICoordTrans getCT(IProjection dest) {

                COperation operation = null;

                CrsGT crsDest = (CrsGT)dest;

                try {

                        operation = new COperation(this, (ICrs)dest);

                } catch (CrsException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                if (!getNadGrid().equals("")){

                        if (isTargetNad())

                                operation.setNadCrsProj(new CrsProj(crsDest.getProj4()+getNadGrid()), true);

                        else

                                operation.setNadCrsProj(new CrsProj(getProj4()+getNadGrid()), false);

                        return operation;

                }

                return operation;                

        }

        public IDatum getDatum() {

                DefaultGeodeticDatum datumGT = (DefaultGeodeticDatum)((AbstractSingleCRS)crsGT).getDatum();

                CRSDatum datum = new CRSDatum(datumGT.getEllipsoid().getSemiMajorAxis(),datumGT.getEllipsoid().getInverseFlattening());

                return datum;

        }

        public Rectangle2D getExtent(Rectangle2D extent, double scale,

                        double wImage, double hImage, double changeUnits, double dpi) {

                // TODO Auto-generated method stub

                return null;

        }

        public Color getGridColor() {

                return gridColor;

        }

        public double getScale(double minX, double maxX, double width, double dpi) {

                double scale = 0D;

        if (!isProjected()) { // Es geogr?fico; calcula la escala.

            scale = ((maxX - minX) * // grados

            // 1852.0 metros x minuto de meridiano

            (dpi / 2.54 * 100.0 * 1852.0 * 60.0)) / // px / metro

                    width; // pixels

        }

        else{

                 scale = ((maxX - minX) * // metros

                    (dpi / 2.54 * 100.0)) / // px / metro

                    width; // pixels

        }

        return scale;

        }

        public boolean isProjected() {

                if (crsGT instanceof AbstractDerivedCRS){

                        return true;

                }else

                        return false;

        }

        public void setGridColor(Color c) {

                gridColor = c;

        }

        public Point2D toGeo(Point2D pt) {

                if (isProjected()){

                        double x[] = {pt.getX()};

                        double y[] = {pt.getY()};

                        double z[] = {0D};

                        try {

                                JNIBaseCrs.operate( x , y, z,

                                                crsProj,crsProjBase);

                        } catch (OperationCrsException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        } catch (CrsProjException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        }

                        return new Point2D.Double(x[0],y[0]);

                }

                else

                        return pt;

        }

        public String getNadGrid() {

                return nad;

        }

        /**

         * @return

         */

        public boolean isTargetNad() {

                return targetNad;

        }

        /**

         * 

         * @return

         */

        public String getProj4() {

                return proj4;

        }

        public CoordinateReferenceSystem getCrsGT() {

                return crsGT;

        }

}