| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 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.

 */

package org.gvsig.georeferencing.gui.listeners;

import java.awt.Component;

import java.awt.geom.Point2D;

import javax.swing.JOptionPane;

import org.gvsig.georeferencing.gui.dialog.GeoreferencingDialog;

import com.iver.andami.PluginServices;

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

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

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

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

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

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

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

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

import com.iver.cit.gvsig.project.documents.view.gui.View;

/**

 * <p>Extensi?n de la clase GeorefPointerListenerImpl de FMap para poder llamar a m?todos de

 * andami o de gvSIG.</p>

 * <p>Este listener mueve puntos desde una vista correspondientes a la capa de puntos.</p>

 * 

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

 */

public class GeorefMovePointListener extends GeorefDraggListenerImpl {

        private GeoreferencingDialog dialog = null;

        private FLyrPoints lyrPoints = null;

        private FLyrGeoRaster lyrGeoRaster = null;

        private View theView = null;

        private ViewPort viewPort = null;

        /**

         * Posici?n del punto a ser seleccionado. 

         */

        private int posPoint = -1;

        /**

         * Es true si el punto que se ha movido corresponde con el pixel 

         * de la imagen y false si corresponde con el punto de la vista

         */

        private boolean isPixel = true;

        /**

         * Constructor

         *

         * @param mapCtrl

         */

        public GeorefMovePointListener(GeoreferencingDialog dialog) {

                super();

                this.dialog = dialog;

        }

        /**

         * Captura de puntos sobre una capa FlyrPoint

         *

         * @param event Evento de un punto sobre la vista

         *

         * @throws BehaviorException

         */

        public void press(PointEvent event) throws BehaviorException {

                super.press(event);

                try{

                        theView = (View)PluginServices.getMDIManager().getActiveWindow();

                }catch(ClassCastException exc){

                        return;

                }

                viewPort = theView.getMapControl().getMapContext().getViewPort();

                FLayers flayers = theView.getMapControl().getMapContext().getLayers();

                //Obtenci?n de la capa de puntos.

                for(int i=0;i<flayers.getLayersCount();i++){

                    FLayer lyr = flayers.getLayer(i);

                    if(lyr instanceof FLyrGeoRaster)

                            lyrGeoRaster = (FLyrGeoRaster)lyr;

                   }

                lyrPoints = lyrGeoRaster.getFLyrPoints();

                   if(lyrGeoRaster == null || lyrPoints == null)

                           return;

                //Hallamos el punto m?s cercano a donde hemos pinchado

                Point2D init = viewPort.toMapPoint(event.getPoint());

                double distance = Double.MAX_VALUE;

                for(int i=0;i<lyrPoints.length();i++){

                        Point2D pixel = lyrGeoRaster.img2World(lyrPoints.getPoint(i).pixelPoint);

                        Point2D map = lyrPoints.getPoint(i).mapPoint;

                        double d1 = init.distance(pixel.getX(), pixel.getY());

                        if(d1 < distance){

                                distance = d1;

                                posPoint = i;

                                isPixel = true;

                        }

                        d1 = init.distance(map.getX(), map.getY());

                        if(d1 < distance){

                                distance = d1;

                                posPoint = i;

                                isPixel = false;

                        }

                }

        }

        /**

         * Reimplementaci?n del m?todo mouseReleased de Behavior.

         *

         * @param e MouseEvent

         *

         * @throws BehaviorException Excepci?n lanzada cuando el Maptool.

         */

        public void release(PointEvent e) throws BehaviorException {

                if(posPoint != -1){

                        //Seleccionamos en el dialogo el punto que se est? moviendo

                        ((GeoreferencingDialog)lyrGeoRaster.getGeoDialog()).getSelectPointsPanel().changePoint(true, posPoint);

                        if(isPixel){

                                //Comprobamos que el punto siga dentro de la imagen

                                Point2D pixelPoint = lyrGeoRaster.world2Img(viewPort.toMapPoint(e.getPoint()));

                                if(pixelPoint == null){

                                        JOptionPane.showMessageDialog((Component)PluginServices.getMainFrame(),

                                                        PluginServices.getText(this, "fuera_de_extent"));

                                        return;

                                }

                                if(theView != null && lyrGeoRaster != null && lyrPoints != null)

                                        lyrGeoRaster.getFLyrPoints().getPointManager().

                                                        updateData(posPoint + 1,

                                                                                pixelPoint, 

                                                                                null, 

                                                                                lyrGeoRaster.getGeoDialog(),

                                                                                theView);

                        }else{

                                 Point2D mapPoint = viewPort.toMapPoint(e.getPoint());

                                if(theView != null && lyrGeoRaster != null && lyrPoints != null)

                                        lyrGeoRaster.getFLyrPoints().getPointManager().

                                                        updateData(posPoint + 1,

                                                                                null, 

                                                                                mapPoint, 

                                                                                lyrGeoRaster.getGeoDialog(),

                                                                                theView);

                        }

                }

        }

}