Application: gvSIG desktop

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

 *

 * Copyright (C) 2004 IVER T.I. 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

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.fmap.tools.Behavior;

import com.iver.cit.gvsig.fmap.tools.BehaviorException;

import com.iver.cit.gvsig.fmap.tools.Events.MeasureEvent;

import com.iver.cit.gvsig.fmap.tools.Listeners.PolylineListener;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

/**

 * <p>Behavior that permits user to draw a polygon by its vertexes on the image of the associated

 *  <code>MapControl</code> using a {@link PolylineListener PolylineListener}.</p>

 *

 * @author Vicente Caballero Navarro

 */

public class PolygonBehavior extends PolylineBehavior {

        /**

         * <p>Creates a new behavior for drawing a polygon by its vertexes.</p>

         *

         * @param ali tool listener used to permit this object to work with the associated <code>MapControl</code>

         */

        public PolygonBehavior(PolylineListener ali) {

                super(ali);

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.PolylineBehavior#paintComponent(java.awt.Graphics)

         */

        public void paintComponent(Graphics g) {

                g.drawImage(getMapControl().getImage(), 0, 0, null);

                g.setColor(Color.black);

                if (!arrayX.isEmpty()) {

                        drawPolyLine((Graphics2D) g);

                }

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.PolylineBehavior#mousePressed(java.awt.event.MouseEvent)

         */

        public void mousePressed(MouseEvent E) throws BehaviorException {

                if (E.getClickCount() == 2) {

                        listener.polylineFinished(new MeasureEvent(

                                        (Double[]) arrayX.toArray(new Double[0]),

                                        (Double[]) arrayY.toArray(new Double[0]), E));

                        arrayX.clear();

                        arrayY.clear();

                        isClicked = false;

                } else {

                        isClicked = true;

                        if (arrayX.size() == 0) {

                                addPoint(getMapControl().getViewPort().toMapPoint(E.getPoint()));

                                addPoint(getMapControl().getViewPort().toMapPoint(E.getPoint()));

                                addPoint(getMapControl().getViewPort().toMapPoint(E.getPoint()));

                        } else {

                                addAntPoint(getMapControl().getViewPort().toMapPoint(E.getPoint()));

                        }

                        listener.pointFixed(new MeasureEvent(

                                        (Double[]) arrayX.toArray(new Double[0]),

                                        (Double[]) arrayY.toArray(new Double[0]), E));

                }

        }

        /**

         * <p>Adds a new vertex to the polygon.</p>

         *

         * @param p a new vertex to the polygon

         */

        private void addAntPoint(Point2D p) {

                arrayX.add(arrayX.size() - 1, new Double(p.getX()));

                arrayY.add(arrayY.size() - 1, new Double(p.getY()));

        }

        /**

         * <p>Changes the last vertex added to the polygon.</p>

         *

         * @param p a new vertex to the polygon

         */

        private void changeAntPoint(Point2D p) {

                if (arrayX.size() > 2) {

                        arrayX.set(arrayX.size() - 2, new Double(p.getX()));

                        arrayY.set(arrayY.size() - 2, new Double(p.getY()));

                }

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.PolylineBehavior#mouseMoved(java.awt.event.MouseEvent)

         */

        public void mouseMoved(MouseEvent E) throws BehaviorException {

                if (isClicked) {

                        changeAntPoint(getMapControl().getViewPort().toMapPoint(E.getPoint()));

                        MeasureEvent event = new MeasureEvent((Double[]) arrayX.toArray(

                                                new Double[0]),

                                        (Double[]) arrayY.toArray(new Double[0]), E);

                        listener.points(event);

                        getMapControl().repaint();

                }

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.PolylineBehavior#mouseDragged(java.awt.event.MouseEvent)

         */

        public void mouseDragged(MouseEvent e) throws BehaviorException {

                mouseMoved(e);

        }

}