Application: gvSIG desktop

/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 * 

 * Copyright (C) 2004-5. 

 *

 * 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:

 * 

 * cresques@gmail.com

 */

package org.cresques.cts.gt2;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Point2D;

import org.cresques.cts.IDatum;

import org.cresques.cts.IProjection;

import org.cresques.geo.ViewPortData;

import org.geotools.cs.CoordinateSystem;

import org.geotools.cs.CoordinateSystemFactory;

import org.geotools.cs.GeographicCoordinateSystem;

import org.geotools.cs.ProjectedCoordinateSystem;

/**

 * Sistema de Coordenadas (Proyecci?n).

 * @author "Luis W. Sevilla" <sevilla_lui@gva.es>

 */

public class CoordSys implements IProjection {

        protected CoordinateSystemFactory csFactory = CoordinateSystemFactory.getDefault();

        protected CSDatum datum = null;

        protected GeographicCoordinateSystem geogCS = null;

        protected ProjectedCoordinateSystem projCS = null;

        protected String abrev = "";

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

        Color gridColor = basicGridColor;

        public CoordSys(CSDatum datum) {

                this.datum = datum;

        }

        /**

         * Crea un nuevo CoordSys geogr?fico a partir de uno proyectado.

         * Si el actual es geogr?fico retorna el mismo.

         * @return

         */

        public CoordSys toGeo() {

                CoordSys coordSys = new CoordSys((CSDatum)getDatum());

                if (geogCS != null)

                        coordSys.geogCS = this.geogCS;

                else

                        coordSys.geogCS = projCS.getGeographicCoordinateSystem();

                return coordSys;

        }

        public IDatum getDatum() {

                return datum;

        }

        public CoordinateSystem getCS() {

                if (projCS != null) return projCS;

                return geogCS;

        }

        public CoordinateSystem getGeogCS() {

                if (geogCS != null) return geogCS;

                return projCS.getGeographicCoordinateSystem();

        }

        /* (no Javadoc)

         * @see org.cresques.cts.IProjection#createPoint(double, double)

         */

        public Point2D createPoint(double x, double y) {

                return new Point2D.Double(x,y);

        }

        public String toString() {

                if (projCS != null) return projCS.toString();

                return geogCS.toString();

        }

        public void setAbrev(String abrev) { this.abrev = abrev; }

        public String getAbrev() {         return abrev; }

        /* (no Javadoc)

         * @see org.cresques.cts.IProjection#drawGrid(java.awt.Graphics2D, org.cresques.geo.ViewPortData)

         */

        public void drawGrid(Graphics2D g, ViewPortData vp) {

                // TODO Ap?ndice de m?todo generado autom?ticamente

        }

        public void setGridColor(Color c) { gridColor = c;}

        public Color getGridColor() { return gridColor;        }

        /* (no Javadoc)

         * @see org.cresques.cts.IProjection#toGeo(java.awt.geom.Point2D)

         */

        public Point2D toGeo(Point2D pt) {

                if (getGeogCS() == geogCS) return pt;

                else {

                        CoordTrans ct = new CoordTrans(this, toGeo());

                        return ct.convert(pt, null);

                }

        }

        /* (no Javadoc)

         * @see org.cresques.cts.IProjection#fromGeo(java.awt.geom.Point2D, java.awt.geom.Point2D)

         */

        public Point2D fromGeo(Point2D gPt, Point2D mPt) {

                // TODO Ap?ndice de m?todo generado autom?ticamente

                return null;

        }

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

                double scale = 0D;

                if (projCS == null) { // 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

                        w;                                                                                // pixels

                }

                return scale;

        }

}