Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.fmap.mapcontrol.tools;

import java.awt.Image;

import java.awt.geom.Point2D;

import org.gvsig.fmap.IconThemeHelper;

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

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureSelection;

import org.gvsig.fmap.dal.feature.FeatureSet;

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

import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect;

import org.gvsig.fmap.mapcontrol.MapControl;

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

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

import org.gvsig.tools.dispose.DisposableIterator;

/**

 * <p>Listener that selects all features of the active, and vector layers of the associated <code>MapControl</code>

 *  that their area intersects with the point selected by a single click of any button of the mouse.</p>

 *

 * @author Vicente Caballero Navarro

 */

public class PointSelectionListener implements PointListener {

        /**

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

         */

        protected MapControl mapCtrl;

        /**

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

         *

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

         */

        public PointSelectionListener(MapControl mc) {

                this.mapCtrl = mc;

        }

        public void point(PointEvent event) throws BehaviorException {

                try {

            Point2D p = event.getPoint();

            Point2D mapPoint = mapCtrl.getViewPort().toMapPoint((int) p.getX(), (int) p.getY());

            // Tolerancia de 3 pixels

            double tol = mapCtrl.getViewPort().toMapDistance(3);

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

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

                if (actives[i] instanceof FLyrVect) {

                    FLyrVect lyrVect = (FLyrVect) actives[i];

                                        FeatureSet newSelection = null;

                                        try {

                                                newSelection = lyrVect.queryByPoint(

                                                                                mapPoint, tol,

                                                                                lyrVect.getFeatureStore().getDefaultFeatureType());

                                                if (event.getEvent().isControlDown()) {

                                                        FeatureSelection currentSelection = (FeatureSelection)lyrVect.getDataStore().getSelection();

                                                        DisposableIterator it = newSelection.fastIterator();

                                                        while(it.hasNext()) {

                                                                Object obj = it.next();

                                                                if(obj instanceof Feature) {

                                                                        Feature feat = ((Feature)obj);

                                                                        if(currentSelection.isSelected(feat))

                                                                                currentSelection.deselect(feat);

                                                                        else

                                                                                currentSelection.select(feat);

                                                                }

                                                        }

                                                } else {

                                                        lyrVect.getFeatureStore()

                                                                        .setSelection(newSelection);

                                                }

                                        } finally {

                                                if (newSelection!=null){

                                                        newSelection.dispose();

                                                }

                    }

                    mapCtrl.drawMap(false); // FIXME Esto deber?a sobrar (la capa deber?a de ser observada)

                }

            }

                } catch (DataException e) {

                        throw new BehaviorException("No se pudo hacer la selecci?n", e);

                }

        }

        public Image getImageCursor() {

                return IconThemeHelper.getImage("cursor-select-by-point");

        }

        public boolean cancelDrawing() {

                return false;

        }

        public void pointDoubleClick(PointEvent event) throws BehaviorException {

        }

}