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svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.app / org.gvsig.app.mainplugin / src / main / java / org / gvsig / app / project / documents / view / toolListeners / StatusBarListener.java @ 45732

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/**
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 * gvSIG. Desktop Geographic Information System.
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 *
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 * Copyright (C) 2007-2013 gvSIG Association.
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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 3
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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., 51 Franklin Street, Fifth Floor, Boston,
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 * MA  02110-1301, USA.
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 *
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 * For any additional information, do not hesitate to contact us
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 * at info AT gvsig.com, or visit our website www.gvsig.com.
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 */
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package org.gvsig.app.project.documents.view.toolListeners;
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import java.awt.Image;
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import java.awt.geom.Point2D;
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import java.text.NumberFormat;
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import org.cresques.cts.IProjection;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.gvsig.andami.PluginServices;
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import org.gvsig.andami.ui.mdiFrame.MainFrame;
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import org.gvsig.fmap.geom.GeometryUtils;
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import org.gvsig.fmap.mapcontext.MapContext;
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import org.gvsig.fmap.mapcontrol.MapControl;
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import org.gvsig.fmap.mapcontrol.tools.BehaviorException;
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import org.gvsig.fmap.mapcontrol.tools.Events.PointEvent;
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import org.gvsig.fmap.mapcontrol.tools.Listeners.PointListener;
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/**
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 * <p>Listener that displays at the status bar of the application's main frame, the value of the point coordinates of the mouse's
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 *  cursor on the associated <code>MapControl</code>, just as is received a <code>PointEvent</code> event.</p>
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 *
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 * <p>Calculates the coordinates equivalent to the point according this rules:
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 *  <ul>
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 *   <li>uses <i><code>formatDegrees(p.get{X or Y}()</code></i> if the associated <code>MapControl</code> object isn't projected.</li>
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 *   <li>uses <i><code>formatDegrees({MapControl's projection}.toGeo(p.get{X or Y}())</code></i> if the associated
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 *    <code>MapControl</code> object is projected and its <code>ViewPort</code>'s distance units are in degrees.</li>
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 *   <li>uses <i><code>{NumberFormat according to {@link #setFractionDigits(Point2D) #setFractionDigits(Point2D)}}.format((p.get{X or Y}()/MapContext.CHANGEM[mapControl.getViewPort().getDistanceUnits()])*MapContext.CHANGEM[mapControl.getViewPort().getMapUnits()])</code></i>
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 *    otherwise.</li>
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 *  </ul>
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 * </p>
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 *
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 * <p>The <u>prefix</u> of the coordinate expressions will be:
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 *  <ul>
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 *   <li>Longitude "<i>Long =</i>" and latitude "<i>Lat =</i>", if the associated <i>MapControl</i> object isn't projected, or the current distance unit
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 *    of the <code>MapControl</code>'s view port is in degrees.</li>
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 *   <li>X "<i>X =</i>" and Y "<i>Y =</i>", otherwise.</li>
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 *  </ul>
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 * </p>
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 *
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 * <p>And the <u>sufix</u> value:
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 *  <ul>
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 *   <li>If the associated <i>MapControl</i> object isn't projected, or the current distance unit
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 *    of the <code>MapControl</code>'s view port is in degrees(expected latitude or longitude), according this pattern:<br>
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 *    <code><b><i>S?G? M' S''</i></b></code>, having:<br>
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 *    <ul>
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 *     <li><i>S?</i> : optionally, if the value is negative, sets a "-" symbol.</li>
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 *     <li><i>G</i> : equivalent grades.</li>
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 *     <li><i>M</i> : equivalent minutes.</li>
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 *     <li><i>S</i> : equivalent seconds.</li>
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 *    </ul>
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 *   </li>
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 *   <li>Otherwise a decimal number according this rules:
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 *    <ul>
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 *     <li><i>8 decimals</i>, if is using any of the following geographic coordinate systems:
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 *      <ul>
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 *       <li><i>EPSG:4230 (known as <a href="http://en.wikipedia.org/wiki/ED50">ED50</a>)</i>.</li>
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 *       <li><i>EPSG:4326 (known as <a href="http://en.wikipedia.org/wiki/WGS84">WGS84</a>)</i>.</li>
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 *      </ul>
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 *     <li><i>2 decimals</i>, otherwise.</li>
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 *    </ul>
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 *   </li>
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 *  </ul>
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 * </p>
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 *
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 * @author Vicente Caballero Navarro
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 */
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public class StatusBarListener implements PointListener {
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    private static Logger logger = LoggerFactory.getLogger(StatusBarListener.class);
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    private static final String DEGRESS_FORMAT = "%-%d? %m' %.0s''";
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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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        private MapControl mapControl = null;
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        /**
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         * Format of the coordinates. Is used to set the number of decimals.
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         */
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        private NumberFormat nf = null;
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        private static long lastLogTime = 0;
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        /**
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         * <p>Creates a new <code>StatusBarListener</code> object.</p>
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         *
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         * @param mc the <code>MapControl</code> where will be applied the changes
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         */
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        public StatusBarListener(MapControl mc) {
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                mapControl = mc;
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                nf = NumberFormat.getInstance();
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                nf.setMaximumFractionDigits(2);
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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 null;
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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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         * 050211, jmorell: M?todo modificado para mejorar la manera de mostrar las
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         * coordenadas geod?sicas en la barra de estado. Muestra Lat y Lon y aumenta
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         * el n?mero de decimales para cuando trabajemos en coordenadas geod?sicas.
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         *
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         * (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#point(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)
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         */
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        public void point(PointEvent event) throws BehaviorException {
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                String[] axisText = new String[2];
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                axisText[0] = "X = ";
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                axisText[1] = "Y = ";
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                Point2D p = mapControl.getMapContext().getViewPort().toMapPoint(event.getPoint());
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                setFractionDigits(p);
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                axisText = setCoorDisplayText(axisText);
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                MainFrame mF = PluginServices.getMainFrame();
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                if (mF != null){
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                        mF.getStatusBar().setMessage("units",
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                            PluginServices.getText(this, MapContext.getDistanceNames()[mapControl.getMapContext().getViewPort().getDistanceUnits()]));
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            // No se debe llamar a setControlValue desde aqu?, porque
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            // cambia la escala, y con ella el viewPort (adem?s, de
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            // la vista que no es).
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            // mF.getStatusBar().setControlValue("scale",String.valueOf(mapControl.getMapContext().getScaleView()));
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            // Fin
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            IProjection proj = mapControl.getViewPort().getProjection();
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                        mF.getStatusBar().setMessage("projection", 
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                proj==null? "":proj.getAbrev()
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            );
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                        String[] coords=getCoords(p);
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                        mF.getStatusBar().setMessage("x", axisText[0] + coords[0]);
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                        mF.getStatusBar().setMessage("y", axisText[1] + coords[1]);
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                }
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        }
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        /**
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         * <p>Sets the number of decimals of the coordinates that will be displayed, according the current projection
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         *  of the associated <code>MapControl</code>:
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         *  <ul>
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         *   <li><i>8 decimals</i>, if is using geographical coordinates:
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         *    <ul>
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         *     <li><i>EPSG:4230 (known as <a href="http://en.wikipedia.org/wiki/ED50">ED50</a>)</i>.</li>
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         *     <li><i>EPSG:4326 (known as <a href="http://en.wikipedia.org/wiki/WGS84">WGS84</a>)</i>.</li>
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         *    </ul>
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         *   <li><i>2 decimals</i>, otherwise.</li>
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         *  </ul>
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         * </p>
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         *
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         * @param p unused parameter
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         *
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         * @version 050211
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         * @author jmorell.
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         */
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        public void setFractionDigits(Point2D p) {
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                IProjection iProj = mapControl.getMapContext().getProjection();
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                if (iProj!=null && !iProj.isProjected()) {
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                        nf.setMaximumFractionDigits(8);
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                } else {
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                        nf.setMaximumFractionDigits(2);
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                }
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        }
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        /**
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         * <p>Gets the name of the coordinates:
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         *  <ul>
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         *   <li><i>Longitude</i> and <i>Latitude</i>, if the associated <i>MapControl</i> object isn't projected, or the current distance unit
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         *    of the <code>MapControl</code>'s view port is in degrees.</li>
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         *   <li><i>X</i> and <i>Y</i>, otherwise.</li>
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         *  </ul>
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         * </p>
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         *
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         * @param p array of at least two <code>String</code>, where text will be stored and returned
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         *
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         * @return text describing the coordinate value:
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         *  <ul>
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         *   <li>If isn't projected:
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         *    <ul>
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         *     <li><code>String[0]</code> : "Long = "</li>
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         *     <li><code>String[1]</code> : "Lat = "</li>
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         *    </ul>
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         *   </li>
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         *   <li>Otherwise:
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         *    <ul>
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         *     <li><code>String[0]</code> : "X = "</li>
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         *     <li><code>String[1]</code> : "Y = "</li>
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         *    </ul>
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         *   </li>
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         *  </ul>
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         *
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         * @version 050211
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         * @author jmorell
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         */
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        public String[] setCoorDisplayText(String[] axisText) {
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                IProjection iProj = mapControl.getMapContext().getProjection();
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        if( iProj == null ) {
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                        axisText[0] = "";
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                        axisText[1] = "";
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        } else {
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            if (!iProj.isProjected() || MapContext.getDistanceNames()[mapControl.getMapContext().getViewPort().getDistanceUnits()].equals("Grados")) {
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                axisText[0] = "Lon = ";
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                axisText[1] = "Lat = ";
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            } else {
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                axisText[0] = "X = ";
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                axisText[1] = "Y = ";
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            }
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        }
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                return axisText;
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        }
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//        /**
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//         * <p>Converts a decimal value (expected latitude or longitude) in degrees, and formats it according this pattern:<br>
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//         *  <code><b><i>S?G? M' S''</i></b></code>, having:<br>
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//         *  <ul>
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//         *   <li><i>S?</i> : optionally, if the value is negative, sets a "-" symbol.</li>
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//         *   <li><i>G</i> : equivalent grades.</li>
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//         *   <li><i>M</i> : equivalent minutes.</li>
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//         *   <li><i>S</i> : equivalent seconds.</li>
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//         *  </ul>
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//         * </p>
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//         *
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//         * @param d the latitude or longitude value to convert
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//         *
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//         * @return value formatted in degrees
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//         */
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//        private String formatDegrees(double d) {
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////                String signo = d<0 ? "-" : "";
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////                d = Math.abs(d);
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////                long grado = 0;
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////                double minuto = 0;
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////                double segundo = 0;
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////
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////                grado = (long)(d);
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////                minuto = (d - grado) * 60;
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////                segundo = (minuto - (long) minuto)*60;
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//////                System.out.println("Grados: " + grado);
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//////                System.out.println("Minutos: " + minuto);
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//////                System.out.println("Segundos: " + segundo);
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////                return signo+grado+"? "+(long) minuto+"' "+(long)segundo+"''";
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//                return GeometryUtils.formatCoordinate("%-%d? %m' %s''", d);
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//        }
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        /**
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         * <p>Returns the coordinates equivalent to <code>p</code>:
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         *  <ul>
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         *   <li>Uses <i><code>formatDegrees(p.get{X or Y}()</code></i> if the associated <code>MapControl</code> object isn't projected.</li>
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         *   <li>Uses <i><code>formatDegrees({MapControl's projection}.toGeo(p.get{X or Y}())</code></i> if the associated
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         *    <code>MapControl</code> object is projected and its <code>ViewPort</code>'s distance units are in degrees.</li>
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         *   <li>Uses <i><code>{NumberFormat according to {@link #setFractionDigits(Point2D) #setFractionDigits(Point2D)}}.format((p.get{X or Y}()/MapContext.CHANGEM[mapControl.getViewPort().getDistanceUnits()])*MapContext.CHANGEM[mapControl.getViewPort().getMapUnits()])</code></i>
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         *    otherwise.</li>
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         *  </ul>
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         * </p>
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         *
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         * @param p point 2D to convert in text coordinates according the projection of the associated <code>MapControl</code> and the
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         *  distance units of its <code>ViewPort</code>.
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         *
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         * @return coordinates equivalent to <code>p</code>, according to the algorithm explained up
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         */
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        public String[] getCoords(Point2D p) {
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                String[] coords=new String[2];
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                IProjection iProj = mapControl.getMapContext().getProjection();
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                if (!iProj.isProjected()) {
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                        coords[0]=String.valueOf(GeometryUtils.formatCoordinate(DEGRESS_FORMAT, p.getX()));
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                        coords[1]=String.valueOf(GeometryUtils.formatCoordinate(DEGRESS_FORMAT, p.getY()));
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                } else {
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                        double[] trans2Meter=MapContext.getDistanceTrans2Meter();
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                        if (PluginServices.getText(this,MapContext.getDistanceNames()[mapControl.getViewPort().getDistanceUnits()]).equals(PluginServices.getText(this,"Grados"))) {
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                                Point2D pgeo = null;
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                                try {
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                                    pgeo = iProj.toGeo(p);
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                        coords[0]=String.valueOf(GeometryUtils.formatCoordinate(DEGRESS_FORMAT, pgeo.getX()));
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                        coords[1]=String.valueOf(GeometryUtils.formatCoordinate(DEGRESS_FORMAT, pgeo.getY()));
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                                } catch (Exception exc) {
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                                    if ((System.currentTimeMillis() - lastLogTime) > 5000) {
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                                        /*
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                                         * Prevent too many log lines
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                                         */
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                                        lastLogTime = System.currentTimeMillis(); 
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                                        logger.info("Error: Unable to unproject coordinates: " + p);
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                                    }
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                                    /*
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                                     * Unable to "unproject". This is not necessarily a bug
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                                     * (example: UTM coordinates very far from fuse)
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                                     */
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                        coords[0]= "-";
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                        coords[1]= "-";
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                                }
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                        }else {
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                                if (PluginServices.getText(this,MapContext.getDistanceNames()[mapControl.getViewPort().getMapUnits()]).equals(PluginServices.getText(this,"Grados"))) {
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                                        mapControl.getViewPort().setMapUnits(1);
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                                }
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                                coords[0]=String.valueOf(nf.format((p.getX()/trans2Meter[mapControl.getViewPort().getDistanceUnits()])*trans2Meter[mapControl.getViewPort().getMapUnits()]));
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                                coords[1]=String.valueOf(nf.format((p.getY()/trans2Meter[mapControl.getViewPort().getDistanceUnits()])*trans2Meter[mapControl.getViewPort().getMapUnits()]));
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                        }
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                }
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                return coords;
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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.PointListener#pointDoubleClick(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)
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         */
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        public void pointDoubleClick(PointEvent event) throws BehaviorException {
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                // TODO Auto-generated method stub
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        }
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}