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.px.dxf;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.GeneralPath;

import java.awt.geom.Point2D;

import org.gvsig.projection.cts.ICoordTrans;

import org.gvsig.projection.cts.IProjection;

import org.gvsig.projection.geo.ViewPortData;

import org.cresques.io.DxfGroup;

import org.gvsig.projection.px.Extent;

/**

 * Entidad ELLIPSE de un fichero DXF.

 * @author jmorell

 */

public class DxfEllipse extends DxfEntity {

    final static Color baseColor = new Color(69, 106, 121);

    //Vector points = null;

    GeneralPath gp = null;

    boolean closed = true;

    Point2D[] pts;

    private double minorAxisLength;

    private Point2D center;

    private double minorToMajorAxisRatio;

    private Color color = baseColor; //Color(255,214,132,255);

    /**

     * Constructor de DxfEllipse.

     * @param proj, proyecci?n cartogr?fica en la que se encuentra el DxfEllipse.

     * @param layer, capa del DXF en la que se encuentra el DxfEllipse.

     * @param pt1, primer punto del semieje mayor.

     * @param pt2, segundo punto del semieje mayor.

     * @param minorAxisLength, longitud del semieje menor.

     */

    public DxfEllipse(IProjection proj, DxfLayer layer, Point2D pt1,

                      Point2D pt2, double minorAxisLength) {

        super(proj, layer);

        pts = new Point2D[2];

        pts[0] = pt1;

        pts[1] = pt2;

        this.minorAxisLength = minorAxisLength;

        extent = new Extent();

        for (int i = 0; i < pts.length; i++) {

            extent.add(pts[i]);

        }

        center = new Point2D.Double((pts[0].getX() + pts[1].getX()) / 2.0,

                                    (pts[0].getY() + pts[1].getY()) / 2.0);

        double majorAxisLength = pt1.distance(pt2);

        //System.out.println("minorAxisLength = " + minorAxisLength);

        //System.out.println("majorAxisLength = " + majorAxisLength);

        minorToMajorAxisRatio = minorAxisLength / majorAxisLength;

    }

    /**

     * Devuelve el color del DxfEllipse.

     * @return Color

     */

    public Color c() {

        return color;

    }

    /**

     * Establece el color del DxfEllipse.

     * @param color

     * @return Color

     */

    public Color c(Color color) {

        this.color = color;

        return color;

    }

    /**

     * Permite reproyectar un DxfEllipse dado un conjunto de coordenadas de transformaci?n.

     * @param rp, coordenadas de transformaci?n.

     */

    public void reProject(ICoordTrans rp) {

        Point2D[] savePts = pts;

        pts = new Point2D[savePts.length];

        extent = new Extent();

        Point2D ptDest = null;

        for (int i = 0; i < savePts.length; i++) {

            ptDest = rp.getPDest().createPoint(0.0, 0.0);

            ptDest = rp.convert((Point2D) savePts[i], ptDest);

            this.pts[i] = ptDest;

            extent.add(ptDest);

        }

        setProjection(rp.getPDest());

    }

    /**

     * Permite dibujar un DxfEllipse.

     */

    public void draw(Graphics2D g, ViewPortData vp) {

        //System.out.println("Va a pintar un circle");

        Color color = null;

        if (dxfColor == AcadColor.BYLAYER) {

            //g.setColor(layer.getColor());

            color = layer.getColor();

        } else {

            //g.setColor(AcadColor.getColor(dxfColor));

            color = AcadColor.getColor(dxfColor);

        }

        newGP(vp);

        if (closed) {

            g.setColor(new Color(color.getRed(), color.getBlue(),

                                 color.getGreen(), 0x80));

            g.fill(gp);

        }

        g.setColor(color);

        g.draw(gp);

    }

    /**

     * Permite generar un GeneralPath partiendo del array de Point2D que conforma el

     * DxfEllipse.

     * @param vp

     */

    private void newGP(ViewPortData vp) {

        //if (gp != null) return;

        gp = new GeneralPath();

        Point2D pt0 = null;

        Point2D pt = null;

        Point2D pt1 = null;

        Point2D.Double ptTmp = new Point2D.Double(0.0, 0.0);

        //System.out.println("pts.length = " + pts.length);

        for (int i = 0; i < pts.length; i++) {

            pt1 = (Point2D) pts[i];

            vp.mat.transform(pt1, ptTmp);

            if (pt0 == null) {

                pt0 = ptTmp;

                gp.moveTo((float) ptTmp.getX(), (float) ptTmp.getY());

            } else {

                gp.lineTo((float) ptTmp.getX(), (float) ptTmp.getY());

            }

        }

        if (closed) {

            gp.closePath();

        }

    }

    /**

     * Permite la escritura de entidades DxfEllipse en un fichero DXF2000.

     * @return String, la cadena que se escribir? en el fichero con la informaci?n

     * del DxfEllipse.

     */

    public String toDxfString() {

        StringBuffer sb = null;

        sb = new StringBuffer(DxfGroup.toString(0, "ELLIPSE"));

        sb.append(DxfGroup.toString(5, getHandle()));

        sb.append(DxfGroup.toString(100, "AcDbEntity"));

        sb.append(DxfGroup.toString(8, layer.getName()));

        sb.append(DxfGroup.toString(62, dxfColor));

        sb.append(DxfGroup.toString(100, "AcDbEllipse"));

        sb.append(DxfGroup.toString(10, getCenter().getX(), 6));

        sb.append(DxfGroup.toString(20, getCenter().getY(), 6));

        sb.append(DxfGroup.toString(30, 0.0, 6));

        sb.append(DxfGroup.toString(11, pts[1].getX() - getCenter().getX(), 6));

        sb.append(DxfGroup.toString(21, pts[1].getY() - getCenter().getY(), 6));

        sb.append(DxfGroup.toString(31, 0.0, 6));

        sb.append(DxfGroup.toString(40, getMinorToMajorAxisRatio(), 6));

        sb.append(DxfGroup.toString(41, 0.0, 6));

        sb.append(DxfGroup.toString(42, 2 * Math.PI, 6));

        return sb.toString();

    }

    /**

     * Devuelve el array de puntos que conforman el DxfEllipse.

     * @return Point2D[], puntos del DxfEllipse.

     */

    public Point2D[] getPts() {

        return pts;

    }

    /**

     * Devuelve el GeneralPath qie conforma el DxfEllipse.

     * @return GeneralPath del DxfEllipse.

     */

    /*public GeneralPath getGeneralPath(ViewPort vp) {

            newGP(vp);

            return (GeneralPath) gp.clone();

    }*/

    /**

     * @return Returns the minorAxisLength.

     */

    public double getMinorAxisLength() {

        return minorAxisLength;

    }

    /**

     * @param minorAxisLength The minorAxisLength to set.

     */

    public void setMinorAxisLength(double minorAxisLength) {

        this.minorAxisLength = minorAxisLength;

    }

    /**

     * @param pts The pts to set.

     */

    public void setPts(Point2D[] pts) {

        this.pts = pts;

    }

    /**

     * @return Returns the center.

     */

    public Point2D getCenter() {

        return center;

    }

    /**

     * @param center The center to set.

     */

    public void setCenter(Point2D center) {

        this.center = center;

    }

    /**

     * @return Returns the majorToMinorAxisRatio.

     */

    public double getMinorToMajorAxisRatio() {

        return minorToMajorAxisRatio;

    }

    /**

     * @param majorToMinorAxisRatio The majorToMinorAxisRatio to set.

     */

    public void setMinorToMajorAxisRatio(double majorToMinorAxisRatio) {

        this.minorToMajorAxisRatio = majorToMinorAxisRatio;

    }

}