Application: gvSIG desktop » gvSIG data provider for DXF

/*

 * 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.Graphics2D;

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 POINT de un fichero DXF.

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

 * @author jmorell

 */

public class DxfPoint extends DxfEntity {

    private Point2D pt;

    /**

     * Constructor de DxfPoint.

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

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

     */

    public DxfPoint(IProjection proj, DxfLayer layer) {

        super(proj, layer);

        extent = new Extent();

        pt = new Point2D.Double();

    }

    /**

     * Establece el punto de inserci?n del DxfPoint.

     * @param pt, punto de inserci?n.

     */

    public void setPt(Point2D pt) {

        this.pt = pt;

        extent.add(pt);

    }

    /**

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

     * @param rp, coordenadas de transformaci?n.

     */

    public void reProject(ICoordTrans rp) {

        Point2D savePt = pt;

        pt = new Point2D.Double();

        extent = new Extent();

        Point2D ptDest = rp.getPDest().createPoint(0.0, 0.0);

        if (savePt == null) {

            ptDest = null;

        } else {

            ptDest = rp.convert((Point2D) savePt, ptDest);

            extent.add(ptDest);

        }

        pt = ptDest;

        setProjection(rp.getPDest());

    }

    /**

     * Permite dibujar un DxfPoint.

     */

    public void draw(Graphics2D g, ViewPortData vp) {

        //AffineTransform msave=g.getTransform();

        //g.setTransform(vp.mat);

        if (dxfColor == AcadColor.BYLAYER) {

            g.setColor(layer.getColor());

        } else {

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

        }

        Point2D ptT = new Point2D.Double(0, 0);

        vp.mat.transform(ptT, ptT);

        ptT.setLocation(pt.getX(), pt.getY());

        vp.mat.transform(ptT, ptT);

        g.drawLine((int) ptT.getX(), (int) ptT.getY(), (int) ptT.getX(),

                   (int) ptT.getY());

        //g.setTransform(msave);

    }

    /**

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

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

     * del DxfPoint.

     */

    public String toDxfString() {

        StringBuffer sb = null;

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

        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, "AcDbPoint"));

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

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

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

        return sb.toString();

    }

    /**

     * @return Returns the pt.

     */

    public Point2D getPt() {

        return pt;

    }

}