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.project.documents.view.toolListeners;

import java.awt.Cursor;

import java.awt.Image;

import java.awt.Point;

import java.awt.Toolkit;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import javax.swing.ImageIcon;

import org.gvsig.fmap.geom.primitive.DefaultEnvelope;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.fmap.mapcontrol.tools.BehaviorException;

import org.gvsig.fmap.mapcontrol.tools.Events.PointEvent;

import org.gvsig.fmap.mapcontrol.tools.Listeners.PointListener;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.project.documents.view.MapOverview;

/**

 * <p>Listener for changes of the zoom caused by selecting a point on the associated {@link MapOverview MapOverview} object

 *  by a single click of the button 1 of the mouse.</p>

 *

 * <p>Updates the extent of its <code>ViewPort</code> with a <i>zoom out</i> operation, and enables/disables controls for

 *  managing the data.</p>

 *

 * @see ViewPort

 *

 * @author Vicente Caballero Navarro

 */

public class MapOverviewListener implements PointListener {

        /**

         * The image to display when the cursor is active.

         */

        private final Image izoomout = PluginServices.getIconTheme().get("crux-cursor").getImage();

        /**

         * The cursor used to work with this tool listener.

         *

         * @see #getCursor()

         */

        private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(izoomout,

                        new Point(16, 16), "");

        /**

         * Reference to the <code>MapControl</code> object that uses.

         */

        protected MapOverview mapControl;

        /**

          * <p>Creates a new listener for zooming out the extent of the associated {@link MapOverview MapOverview} object.</p>

         *

         * @param mapControl the <code>MapControl</code> object which represents the <code>MapOverview</code>

         */

        public MapOverviewListener(MapOverview mapControl) {

                this.mapControl = mapControl;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#point(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)

         */

        public void point(PointEvent event) {

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

                if (vp.getExtent() != null &&

                                mapControl.getAssociatedMapContext().getViewPort().getExtent()!=null) {

                        Point2D p = vp.toMapPoint(event.getPoint());

                        Rectangle2D r = (Rectangle2D) mapControl.getAssociatedMapContext()

                                                                                   .getViewPort().getExtent().clone();

                        r.setRect(p.getX() - (r.getWidth() / 2),

                                p.getY() - (r.getHeight() / 2), r.getWidth(), r.getHeight());

                        if (event.getEvent().getButton()!=MouseEvent.BUTTON1) {

                                ((MapOverview) this.mapControl).getAssociatedMapContext()

                                        .getViewPort().setEnvelope(new DefaultEnvelope(2,new double[]{r.getX(),r.getY()},new double[]{r.getMaxX(),r.getMaxY()}));

                                PluginServices.getMainFrame().enableControls();

                        }

                }

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getCursor()

         */

        public Cursor getCursor() {

                return cur;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing()

         */

        public boolean cancelDrawing() {

                return true;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#pointDoubleClick(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)

         */

        public void pointDoubleClick(PointEvent event) throws BehaviorException {

                // TODO Auto-generated method stub

        }

}