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.app.project.documents.view.toolListeners;

import java.awt.geom.Point2D;

import java.text.NumberFormat;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.ui.mdiFrame.MainFrame;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.fmap.mapcontrol.tools.AreaListenerImpl;

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

/**

 * <p>Listener for calculating the area of a polygon, defined in the associated {@link MapControl MapControl}

 *  object.</p>

 * <p>Moves the extent of the associated {@link MapControl MapControl} object

 *  according the movement between the initial and final points of the line determined by the movement

 *  dragged with the third button of the mouse.</p>

 *

 * <p>Updates the status bar of the main frame of the application with the current area.</p>

 *

 * @see AreaListenerImpl

 *

 * @author Vicente Caballero Navarro

 */

public class AreaListener extends AreaListenerImpl {

        /**

          * <p>Creates a new listener for calculating the area of a polygon and displaying it at the status bar

          *  of the main frame of the application.</p>

         *

         * @param mc the <code>MapControl</code> where is calculated the area

         */

    public AreaListener(MapControl mc) {

            super(mc);

    }

    /*

     * (non-Javadoc)

     * @see com.iver.cit.gvsig.fmap.tools.AreaListenerImpl#points(com.iver.cit.gvsig.fmap.tools.Events.MeasureEvent)

     */

    public void points(MeasureEvent event) {

        this.event = event;

        double dist = 0;

        double distAll = 0;

        ViewPort vp = mapCtrl.getMapContext().getViewPort();

        for (int i = 0; i < (event.getXs().length - 1); i++) {

            dist = 0;

            Point2D p = new Point2D.Double(event.getXs()[i].doubleValue(), event.getYs()[i].doubleValue());//vp.toMapPoint(new Point(event.getXs()[i].intValue(), event.getYs()[i].intValue()));

            Point2D p2 = new Point2D.Double(event.getXs()[i + 1].doubleValue(), event.getYs()[i + 1].doubleValue());//vp.toMapPoint(new Point(event.getXs()[i + 1].intValue(), event.getYs()[i + 1].intValue()));

            ///dist = vp.toMapDistance((int) p.distance(p2));

            dist = vp.distanceWorld(p,p2);

//            System.out.println("distancia parcial = "+dist);

            distAll += dist;

        }

       // System.out.println("Per?metro = " + distAll + " ?rea = " +

       //     (returnArea(vp.toMapPoint(

       //             new Point2D.Double(

       //                 event.getXs()[event.getXs().length - 2].doubleValue(),

       //                 event.getYs()[event.getYs().length - 2].doubleValue())))));

        NumberFormat nf = NumberFormat.getInstance();

        nf.setMaximumFractionDigits(2);

        MainFrame mF = PluginServices.getMainFrame();

        if (mF != null)

        {

                int distanceUnits=mapCtrl.getViewPort().getDistanceUnits();

                int distanceArea=mapCtrl.getViewPort().getDistanceArea();

            mF.getStatusBar().setMessage("4",

                                "P:" + nf.format(distAll/MapContext.getDistanceTrans2Meter()[distanceUnits]) + "");

                        mF.getStatusBar().setMessage("5",

                                ///"A:" + nf.format(returnArea(vp.toMapPoint(

                    ///        new Point2D.Double(

                    ///                event.getXs()[event.getXs().length - 2].doubleValue(),

                    ///                event.getYs()[event.getYs().length - 2].doubleValue())))/FMap.CHANGEM[mapCtrl.getViewPort().getDistanceUnits()]) + "");

                                        "A:" + nf.format(returnArea(

                                new Point2D.Double(

                                        event.getXs()[event.getXs().length - 2].doubleValue(),

                                        event.getYs()[event.getYs().length - 2].doubleValue()))/Math.pow(MapContext.getAreaTrans2Meter()[distanceArea],2)) + "");

                        mF.getStatusBar().setMessage("distancearea",MapContext.getAreaAbbr()[distanceArea]);

        }

    }

}