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.gui.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 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.FLyrWCS;

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 that executes a <i>zoom in</i> operation in the associated <code>MapControl</code>,

 *  having as center the point selected.</p>

 * 

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

 * 

 * <p>The <i>zoom in</i> factor will depend on the maximum resolution of the <i>WCS</i> layers in

 *  the <code>MapControl</code>.</p>

 *

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

 */

public class WCSZoomPixelCursorListener implements PointListener {

        /**

         * Object used to log messages for this listener.

         */

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

        /**

         * The image to display when the cursor is active.

         */

        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>WCSZoomPixelCursorListener</code> object.</p>

         * 

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

         */

        public WCSZoomPixelCursorListener(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();

                }

                  if(        ext != null ){

                      double w2 = v.getImageWidth()/2D;

                      double h2 = v.getImageHeight()/2D;

                      double wcOriginX = pReal.getX();

                      double wcOriginY = pReal.getY();

                      Point2D maxRes = ((FLyrWCS)actives[0]).getMaxResolution();

                      double wcDstMinX = wcOriginX-w2*maxRes.getX();

                      double wcDstMinY = wcOriginY-h2*maxRes.getY();

                      double wcDstWidth = w2*maxRes.getX()*2D;

                      double wcDstHeight = h2*maxRes.getY()*2D;

                      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

        }

}