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.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.util.ArrayList;

import javax.swing.ImageIcon;

import org.apache.log4j.Logger;

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

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

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.FLyrRaster;

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

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

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

/**

 * <p>Listener for doing a <i>zoom in</i> operation, centering the extent of the <code>ViewPort</code>

 *  of the associated {@link MapControl MapControl} around the pixel selected by the <code>PointEvent</code>'s

 *  point coordinates.</p>

 *

 * <p>Listens a single click of any mouse's button.</p>

 *

 * @author Nacho Brodin (brodin_ign@gva.es)

 */

public class ZoomPixelCursorListener implements PointListener {

        /**

         * Object used to log messages for this listener.

         */

        private static Logger         logger = Logger.getLogger(ZoomPixelCursorListener.class.getName());

        /**

         * Object used to log messages for this listener.

         */

        private final Image         img = new ImageIcon(MapControl.class.getResource(

                                                                            "images/ZoomPixelCursor.gif")).getImage();

        /**

         * The cursor used to work with this tool listener.

         * 

         * @see #getCursor()

         */

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

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

        /**

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

         */

        private MapControl                 mapCtrl;

        /**

          * <p>Creates a new <code>ZoomPixelCursorListener</code> object.</p>

         *

         * @param mc the <code>MapControl</code> where will be applied the changes

         */

        public ZoomPixelCursorListener(MapControl mc) {

                this.mapCtrl = mc;

        }

        /*

         * (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) throws BehaviorException {

                Point2D pReal = mapCtrl.getMapContext().getViewPort().toMapPoint(event.getPoint());

                Point imagePoint = new Point((int) event.getPoint().getX(), (int) event.getPoint().getY());

                ViewPort v = mapCtrl.getMapContext().getViewPort();

                FLayer[] actives = mapCtrl.getMapContext().getLayers().getActives();

                Rectangle2D ext = null;

                try{

                        ext = actives[0].getFullExtent();

                } catch (com.iver.cit.gvsig.fmap.DriverException e1) {

                        e1.printStackTrace();

                }

            ArrayList attr = ((FLyrRaster)actives[0]).getSource().getAttributes();

            int width = 0, height = 0;

                   for (int i=0; i<attr.size(); i++) {

                        Object[] a = (Object []) attr.get(i);

                        if (a[0].toString().equals("Width"))

                                width = ((Integer)a[1]).intValue();

                        if (a[0].toString().equals("Height"))

                                height = ((Integer)a[1]).intValue();

                }

                   if(        ext != null &&

                           width != 0 &&

                        height != 0){

                double wcOriginCenterX = pReal.getX();

                double wcOriginCenterY = pReal.getY();

                //Hallamos la relaci?n entre el pixel y las WC a partir de la imagen de la capa

                        double relacionPixelWcWidth =  (ext.getMaxX() - ext.getMinX())/width;

                        double relacionPixelWcHeight = (ext.getMaxY() - ext.getMinY())/height;

                        double desplazamientoX = ext.getMinX();

                        double desplazamientoY = ext.getMinY();

                        double wcOriginX = wcOriginCenterX - ((v.getImageWidth()*relacionPixelWcWidth)/2);

                        double wcOriginY = wcOriginCenterY - ((v.getImageHeight()*relacionPixelWcHeight)/2);

                        double wcDstMinX = wcOriginX;

                        double wcDstMinY = wcOriginY;

                        double wcDstMaxX = wcDstMinX + (v.getImageWidth()*relacionPixelWcWidth);

                        double wcDstMaxY = wcDstMinY + (v.getImageHeight()*relacionPixelWcHeight);

                        double wcDstWidth = wcDstMaxX - wcDstMinX;

                        double wcDstHeight = wcDstMaxY - wcDstMinY;

                        ext = new Rectangle2D.Double(wcDstMinX, wcDstMinY, wcDstWidth, wcDstHeight);

                mapCtrl.getMapContext().getViewPort().setExtent(ext);

                   }

        }

        /*

         * (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 false;

        }

        /*

         * (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

        }

}