Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* 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., 51 Franklin Street, Fifth Floor, Boston, 

* MA  02110-1301, USA.

* 

*/

package org.gvsig.raster.wcs.app.wcsclient.gui.toc;

import java.awt.Cursor;

import java.awt.Image;

import java.awt.Point;

import java.awt.Toolkit;

import java.awt.geom.Point2D;

import org.gvsig.andami.IconThemeHelper;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.exception.CreateEnvelopeException;

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

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.layers.FLayer;

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 org.gvsig.raster.wcs.app.wcsclient.layer.FLyrWCS;

/**

 * <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 {

        private static final GeometryManager         geomManager                                 = GeometryLocator.getGeometryManager();

        /**

         * 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 = IconThemeHelper.getImageIcon("view-previsualize-area").getImage();

        /**

         * The cursor used to work with this tool listener.

         * 

         * @see #getCursor()

         */ 

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

        /**

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

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

        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();

                Envelope ext = null;

                try {

                        ext = actives[0].getFullEnvelope();

                } catch (ReadException e) {

                        throw new BehaviorException(e.getMessage());

                }

                  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;

                      Envelope rect;

                        try {

                                rect = geomManager.createEnvelope(

                                                wcDstMinX, wcDstMinY, wcDstMinX + wcDstWidth, wcDstMinY - wcDstHeight, SUBTYPES.GEOM2D);

                        } catch (CreateEnvelopeException e) {

                                throw new BehaviorException(e.getMessage());

                        }

                         mapCtrl.getMapContext().getViewPort().setEnvelope(rect);

                  }

        }

        /*

         * (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 {

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.mapcontrol.tools.Listeners.ToolListener#getImageCursor()

         */

        public Image getImageCursor() {

                return img;

        }

}