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.core.GeneralPathX;

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 com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.util.ArrayList;

/**

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

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

 *

 * @author Vicente Caballero Navarro

 */

public class PolylineBehavior extends Behavior {

        /**

         * The abscissa coordinate of all vertexes of the polyline. 

         */

        protected ArrayList arrayX = new ArrayList();

        /**

         * The ordinate coordinate of all vertexes of the polyline. 

         */

        protected ArrayList arrayY = new ArrayList();

        /**

         * Determines if user is setting the vertexes (with one click of the button 1 of the mouse), or not.

         */

        protected boolean isClicked = false;

        /**

         * Tool listener used to work with the <code>MapControl</code> object.

         * 

         * @see #getListener()

         * @see #setListener(ToolListener)

         */

        protected PolylineListener listener;

        /**

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

         *

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

         */

        public PolylineBehavior(PolylineListener mli) {

                listener = mli;

        }

        /*

         * (non-Javadoc)

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

         */

        public void mousePressed(MouseEvent E) throws BehaviorException {

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

                        //System.err.println("dobleclick");

                        //Point2D p1=getMapControl().getViewPort().toMapPoint();

                        listener.polylineFinished(new MeasureEvent(

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

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

                        arrayX.clear();

                        arrayY.clear();

                        isClicked = false;

                } else {

                        //System.err.println("simpleclick");

                        isClicked = true;

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

                        if (arrayX.size() < 2) {

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

                        }

                        listener.pointFixed(new MeasureEvent(

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

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

                }

        }

        /*

         * (non-Javadoc)

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

         */

        public void mouseDragged(MouseEvent e) throws BehaviorException {

                mouseMoved(e);

        }

        /**

         * <p>Changes the last point added of the polyline.</p>

         *

         * @param p a point which will replace the last added to the polyline

         */

        protected void changeLastPoint(Point2D p) {

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

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

        }

        /*

         * (non-Javadoc)

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

         */

        public void mouseMoved(MouseEvent E) throws BehaviorException {

                //System.err.println("moved antes de click");

                if (isClicked) {

                        //System.err.println("moved despues de click");

                        changeLastPoint(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();

                }

        }

        /**

         * <p>Draws the polyline in the <code>Graphics2D</code> of the associated <code>MapControl</code>.</p>

         *

         * @param g2 the 2D context that allows draw the polyline

         */

        protected void drawPolyLine(Graphics2D g2) {

                GeneralPathX polyline = new GeneralPathX(GeneralPathX.WIND_EVEN_ODD,

                                arrayX.size());

                Point2D pScreen0=getMapControl().getViewPort().fromMapPoint(new Point2D.Double(((Double) arrayX.get(0)).doubleValue(),

                                ((Double) arrayY.get(0)).doubleValue()));

                polyline.moveTo(pScreen0.getX(),

                                pScreen0.getY());

                for (int index = 1; index < arrayX.size(); index++) {

                        Point2D pScreen=getMapControl().getViewPort().fromMapPoint(new Point2D.Double(((Double) arrayX.get(index)).doubleValue(),

                                        ((Double) arrayY.get(index)).doubleValue()));

                        polyline.lineTo(pScreen.getX(),pScreen.getY());

                }

                g2.draw(polyline);

        }

        /**

         * <p>Adds a new point to the polyline.</p>

         *

         * @param p a new point to the polyline

         */

        protected void addPoint(Point2D p) {

                arrayX.add(new Double(p.getX()));

                arrayY.add(new Double(p.getY()));

        }

        /**

         * <p>Sets a tool listener to work with the <code>MapControl</code> using this behavior.</p>

         * 

         * @param listener a <code>PolylineListener</code> object for this behavior

         */

        public void setListener(ToolListener listener) {

                this.listener = (PolylineListener) listener;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#getListener()

         */

        public ToolListener getListener() {

                return listener;

        }

}