| gvSIG desktop 1

/* 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 java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.event.MouseEvent;

import java.awt.geom.Arc2D;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

import com.iver.cit.gvsig.fmap.ViewPort;

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.CircleListener;

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

/**

 * <p>Behavior that allows user to draw a circle on the image of the associated

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

 *

 * @author Laura

 * @author Pablo Piqueras Bartolom?

 */

public class CircleBehavior extends Behavior {

        /**

         * First point set, that represents the center of the circle.

         */

        private Point2D m_FirstPoint;

        /**

         * Second point set, that permits calculate the radius of the circle.

         */

        private Point2D m_LastPoint;

        /**

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

         * 

         * @see #getListener()

         * @see #setListener(ToolListener)

         */

        private CircleListener listener;

        /**

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

         */

        protected boolean isClicked = false;

        /**

          * <p>Creates a new behavior for selecting circle areas.</p>

          *

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

         */

        public CircleBehavior(CircleListener zili) {

                listener = zili;

        }

        /*

         * (non-Javadoc)

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

         */

        public void paintComponent(Graphics g) {

                double radio;

                BufferedImage img = getMapControl().getImage();

                g.drawImage(img, 0, 0, null);

                g.setColor(Color.black);

                g.setXORMode(Color.white);

                if ((m_FirstPoint != null) && (m_LastPoint != null)) {

                        radio = m_LastPoint.distance(m_FirstPoint);

                        Arc2D.Double arc = new Arc2D.Double(m_FirstPoint.getX()-radio,

                                                                                                m_FirstPoint.getY()-radio,

                                                                                                2*radio,

                                                                                                2*radio, 0, 360, Arc2D.OPEN);

                        ((Graphics2D) g).draw(arc);

                }

        }

        /*

         * (non-Javadoc)

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

         */

        public void mousePressed(MouseEvent e) {

                if (e.getButton() == MouseEvent.BUTTON1) {

                        m_FirstPoint = e.getPoint();

                        isClicked = true;

                        getMapControl().repaint();

                }

                if (listener.cancelDrawing()) {

                        getMapControl().cancelDrawing();

                        isClicked = false;

                        getMapControl().repaint();

                }

        }

        /*

         * (non-Javadoc)

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

         */

        public void mouseReleased(MouseEvent e) throws BehaviorException {

                m_FirstPoint = null;

                m_LastPoint = null;

                isClicked = false;

        }

        /*

         * (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);

        }

        /*

         * (non-Javadoc)

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

         */

        public void mouseMoved(MouseEvent e)  throws BehaviorException {

            if (m_FirstPoint == null) return;

            m_LastPoint = e.getPoint();

                ViewPort vp = getMapControl().getMapContext().getViewPort();

                Point2D p1 = vp.toMapPoint(m_FirstPoint);

                Point2D p2 = vp.toMapPoint(m_LastPoint);

                //        Fijamos el nuevo extent

                Rectangle2D.Double r = new Rectangle2D.Double();

                r.setFrameFromDiagonal(p1, p2);

                Rectangle2D rectPixel = new Rectangle();

                rectPixel.setFrameFromDiagonal(m_FirstPoint, m_LastPoint);

                Double[] x = new Double[2];

                Double[] y = new Double[2];

                x[0] = new Double(p1.getX());

                x[1] = new Double(p2.getX());

                y[0] = new Double(p1.getY());

                y[1] = new Double(p2.getY());

                MeasureEvent event = new MeasureEvent(x, y, e);

                listener.circle(event);

                getMapControl().repaint();

        }

        /**

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

         * 

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

         */

        public void setListener(ToolListener listener) {

                this.listener = (CircleListener)listener;

        }

        /*

         * (non-Javadoc)

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

         */

        public ToolListener getListener() {

                return listener;

        }

}