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/*

 * 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.gvsig.dxf.px.dxf;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.GeneralPath;

import java.awt.geom.Point2D;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.cresques.geo.ViewPortData;

import org.cresques.px.Extent;

import org.gvsig.dxf.io.DxfGroup;

/**

 * Entidad LINE de un fichero DXF.

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

 * @author jmorell

 */

public class DxfLine extends DxfEntity {

    final static Color baseColor = new Color(255, 106, 121);

    Point2D[] pts;

    GeneralPath gp = null;

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

    /**

     * Constructor de DxfLine.

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

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

     * @param p1, punto inicial de la l?nea.

     * @param p2, punto final de la l?nea.

     */

    public DxfLine(IProjection proj, DxfLayer layer, Point2D p1, Point2D p2) {

        super(proj, layer);

        extent = new Extent(p1, p2);

        pts = new Point2D[2];

        pts[0] = p1;

        pts[1] = p2;

    }

    /**

     * Devuelve el color de la DxfLine.

     * @return Color

     */

    public Color c() {

        return color;

    }

    /**

     * Establece el color de la DxfLine.

     * @param color

     * @return Color

     */

    public Color c(Color color) {

        this.color = color;

        return color;

    }

    /**

     * Permite reproyectar una DxfLine 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[2];

        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);

            pts[i] = ptDest;

            extent.add(ptDest);

        }

        setProjection(rp.getPDest());

    }

    /**

     * Permite dibujar una DxfLine.

     */

    public void draw(Graphics2D g, ViewPortData vp) {

        if (dxfColor == AcadColor.BYLAYER) {

            g.setColor(layer.getColor());

        } else {

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

        }

        newGP(vp);

        g.draw(gp);

    }

    /**

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

     * DxfLine.

     * @param vp

     */

    private void newGP(ViewPortData vp) {

        //if (gp != null) return;

        Point2D.Double pt0 = new Point2D.Double(0.0, 0.0);

        Point2D.Double pt1 = new Point2D.Double(0.0, 0.0);

        vp.mat.transform((Point2D) pts[0], pt0);

        vp.mat.transform((Point2D) pts[1], pt1);

        gp = new GeneralPath();

        gp.moveTo((float) pt0.getX(), (float) pt0.getY());

        gp.lineTo((float) pt1.getX(), (float) pt1.getY());

    }

    /**

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

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

     * de la DxfLine.

     */

    public String toDxfString() {

        StringBuffer sb = null;

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

        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, "AcDbLine"));

        sb.append(DxfGroup.toString(10, pts[0].getX(), 6));

        sb.append(DxfGroup.toString(20, pts[0].getY(), 6));

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

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

        return sb.toString();

    }

    /**

     * Devuelve el array de puntos que conforman el DxfLine.

     * @return Point2D[], puntos del DxfLine.

     */

    public Point2D[] getPts() {

        return pts;

    }

}