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.MoveEvent;

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

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

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Point;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

/**

 * <p>Behavior that permits user to drag the image of the associated

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

 *

 * @author Vicente Caballero Navarro

 */

public class DraggerBehavior extends Behavior {

        /**

         * First point of the path in image coordinates.

         */

        private Point2D m_FirstPoint;

        private Point2D m_LastPoint;

        /**

         * Auxiliary point that represents a corner selected in image coordinates.

         */

        private Point2D m_PointAnt;

        /**

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

         * 

         * @see #getListener()

         * @see #setListener(ToolListener)

         */

        private PanListener listener;

        /**

          * <p>Creates a new behavior for dragging the mouse.</p>

          *

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

         */

        public DraggerBehavior(PanListener pli) {

                listener = pli;

        }

        /*

         * (non-Javadoc)

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

         */

        public void paintComponent(Graphics g) {

        }

        /*

         * (non-Javadoc)

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

         */

        public void mousePressed(MouseEvent e) {

                Point pScreen = e.getPoint();

                m_PointAnt = pScreen;

                m_FirstPoint = m_PointAnt;

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

                        m_PointAnt = pScreen;

                        m_FirstPoint = m_PointAnt;

                }

                if (listener.cancelDrawing()) {

                        getMapControl().cancelDrawing();

                }

        }

        /*

         * (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;

        }

        /*

         * (non-Javadoc)

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

         */

        public void mouseDragged(MouseEvent e) throws BehaviorException {

                m_LastPoint = e.getPoint();

                MoveEvent event = new MoveEvent(m_FirstPoint, e.getPoint(), e);

                listener.move(event);

                getMapControl().repaint();

        }

        /**

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

         * 

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

         */

        public void setListener(ToolListener listener) {

                this.listener = (PanListener) listener;

        }

        /*

         * (non-Javadoc)

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

         */

        public ToolListener getListener() {

                return listener;

        }

}