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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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 *
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 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
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 *
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 * For more information, contact:
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 *
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 *  Generalitat Valenciana
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 *   Conselleria d'Infraestructures i Transport
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 *   Av. Blasco Ib??ez, 50
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 *   46010 VALENCIA
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 *   SPAIN
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 *
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 *      +34 963862235
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 *   gvsig@gva.es
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 *      www.gvsig.gva.es
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 *
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 *    or
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 *
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 *   IVER T.I. S.A
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 *   Salamanca 50
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 *   46005 Valencia
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 *   Spain
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 *
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 *   +34 963163400
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 *   dac@iver.es
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 */
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package org.gvsig.fmap.mapcontrol.tools;
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import java.awt.Image;
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import java.awt.Point;
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import org.gvsig.fmap.IconThemeHelper;
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import org.gvsig.fmap.mapcontext.ViewPort;
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import org.gvsig.fmap.mapcontrol.MapControl;
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import org.gvsig.fmap.mapcontrol.tools.Events.MeasureEvent;
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import org.gvsig.fmap.mapcontrol.tools.Listeners.PolylineListener;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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 * <p>Listener for calculating the length of the segments of a polyline, defined in the associated {@link MapControl MapControl}
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 *  object.</p>
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 *
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 * @author Vicente Caballero Navarro
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 */
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public class MeasureListenerImpl implements PolylineListener {
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        private static final Logger logger = LoggerFactory.getLogger(MeasureListenerImpl.class);
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        /**
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         * The image to display when the cursor is active.
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         */
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//        private final Image iruler = PluginServices.getIconTheme().get("cursor-query-area").getImage();
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        /**
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         * Reference to the <code>MapControl</code> object that uses.
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         */
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        protected MapControl mapCtrl;
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        /**
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         * <p>Creates a new listener for calculating the length of a polyline.</p>
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         *
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         * @param mc the <code>MapControl</code> where is calculated the length
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         */
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        public MeasureListenerImpl(MapControl mc) {
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                this.mapCtrl = mc;
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        }
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        /*
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PolylineListener#points(com.iver.cit.gvsig.fmap.tools.Events.MeasureEvent)
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         */
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        public void points(MeasureEvent event) {
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                double dist = 0;
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                double distAll = 0;
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                ViewPort vp = mapCtrl.getMapContext().getViewPort();
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                for (int i = 0; i < (event.getXs().length - 1); i++) {
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                        dist = 0;
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                        Point p = new Point(event.getXs()[i].intValue(),
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                                        event.getXs()[i].intValue());
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                        Point p2 = new Point(event.getXs()[i + 1].intValue(),
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                                        event.getXs()[i + 1].intValue());
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                        ///dist = vp.toMapDistance((int) p.distance(p2));
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                        dist = vp.distanceWorld(p, p2);
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                        distAll += dist;
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                }
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                logger.debug("Distancia = {}, Distancia Total = {}.",dist,distAll);
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        }
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        /*
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getImageCursor()
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         */
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        public Image getImageCursor() {
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                return IconThemeHelper.getImage("cursor-query-area");
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        }
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        /*
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PolylineListener#pointFixed(com.iver.cit.gvsig.fmap.tools.Events.MeasureEvent)
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         */
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        public void pointFixed(MeasureEvent event) {
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        }
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        /*
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing()
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         */
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        public boolean cancelDrawing() {
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                return false;
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        }
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        /*
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PolylineListener#polylineFinished(com.iver.cit.gvsig.fmap.tools.Events.MeasureEvent)
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         */
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        public void polylineFinished(MeasureEvent event) {
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        }
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}