Application: gvSIG desktop

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

 *

 * Copyright (C) 2007 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.rastertools.geolocation.listener;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.geom.AffineTransform;

import java.awt.geom.Rectangle2D;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.EventObject;

import javax.swing.JFileChooser;

import org.gvsig.fmap.raster.layers.FLyrRasterSE;

import org.gvsig.gui.beans.datainput.DataInputContainerListener;

import org.gvsig.raster.datastruct.Extent;

import org.gvsig.raster.util.Historical;

import org.gvsig.raster.util.RasterToolsUtil;

import org.gvsig.rastertools.geolocation.ui.GeoLocationPanel;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.addlayer.fileopen.FileOpenWizard;

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

/**

 * Listener para el panel de geolocalizaci?n.

 * @version 31/07/2007

 * @author Nacho Brodin (nachobrodin@gmail.com)

 *

 */

public class GeoLocationPanelListener implements ActionListener, DataInputContainerListener {

        private GeoLocationPanel        panel = null;

        private boolean             enableValueChangeEvent = false;

        /**

         * Crea un nuevo <code>GeoLocationPanelListener</code> 

         * @param panel

         */

        public GeoLocationPanelListener(GeoLocationPanel panel) {

                this.panel = panel;

        }

        /**

         * M?todo que se invoca cuando se disparan los eventos de los botones

         */

        public void actionPerformed(ActionEvent e) {

                if(e.getSource() == panel.getSaveButton()) {

                        if(RasterToolsUtil.messageBoxYesOrNot(PluginServices.getText(this,"aviso_write_transform"), panel)) {

                                try {

                                        panel.getLayer().saveGeoToRmf();

                                        panel.activeButtons();

                                } catch (IOException e1) {

                                        RasterToolsUtil.messageBoxError(PluginServices.getText(this,"error_salvando_rmf"), panel);

                                }

                                panel.setModify(false);

                        }

                        return;

                }

                //Asignamos la georreferenciaci?n que hay en ese momento en el dialogo

                if(e.getSource() == panel.getApplyButton()) {

                        try {

                                double ulx = Double.parseDouble(panel.getUlx().getValue());

                                double uly = Double.parseDouble(panel.getUly().getValue());

                                double psx = Double.parseDouble(panel.getPsx().getValue());

                                double psy = Double.parseDouble(panel.getPsy().getValue());

                                double rotx = Double.parseDouble(panel.getRotx().getValue());

                                double roty = Double.parseDouble(panel.getRoty().getValue());

                                AffineTransform at = new AffineTransform(psx, roty, rotx, psy, ulx, uly);

                                panel.getLayer().setAffineTransform(at);

                                panel.getMapCtrl().getMapContext().invalidate();

                                return;

                        } catch(NumberFormatException ex) {

                                RasterToolsUtil.messageBoxError(PluginServices.getText(this,"error_transformacion"), panel);

                                return;

                        }

                }

                Historical hist = panel.getHistorical();

                if(hist == null)

                        return;

                AffineTransform at = null;

                //Cargamos la primera transformaci?n

                if(e.getSource() == panel.getFirstButton()) 

                        at = (AffineTransform)hist.getFirst();

                //Cargamos la transformaci?n anterior

                if(e.getSource() == panel.getBackButton()) 

                        at = (AffineTransform)hist.getBack();

                ////Cargamos la transformaci?n siguiente

                if(e.getSource() == panel.getNextButton())

                        at = (AffineTransform)hist.getNext();

                //Cargamos la georreferenciaci?n del raster

                if(e.getSource() == panel.getResetButton())

                        at = panel.getLayer().getDataSource().getOwnAffineTransform();

                //Cargar la georreferenciaci?n desde tfw

                if(e.getSource() == panel.getTfwLoad()) {

                        JFileChooser chooser = new JFileChooser(FileOpenWizard.getLastPath());

                        chooser.setDialogTitle(PluginServices.getText(this, "seleccionar_fichero"));

                        chooser.addChoosableFileFilter(new GeorreferencingFileFilter("tfw"));

                        chooser.addChoosableFileFilter(new GeorreferencingFileFilter("wld"));

                        int returnVal = chooser.showOpenDialog(panel);

                        if (returnVal == JFileChooser.APPROVE_OPTION) {

                                String fName = chooser.getSelectedFile().toString();

                                at = readTfw(fName);

                        }

                }

                //Centrar el raster en la vista

                if(e.getSource() == panel.getCenterToView()) {

                        Extent extentView = calcCenterExtent(panel.getViewPort());

                        double x = extentView.minX();

                        double y = extentView.maxY();

                        double psX = extentView.width() / ((FLyrRasterSE)panel.getLayer()).getPxWidth();

                        double psY = -(extentView.height() / ((FLyrRasterSE)panel.getLayer()).getPxHeight());

                        at = new AffineTransform(psX, 0, 0, psY, x, y);

                        panel.setModify(true);

                }

                //Entrar? en el caso de que se haya seleccionado alguna transformaci?n

                if(at != null) {

                        panel.getLayer().setAT(at);

                        panel.loadTransform(at);

                        panel.activeButtons();

                        panel.getMapCtrl().getMapContext().invalidate();

                }

        }

        /**

         * Control del cambio de valor dentro de las cajas de texto. Cuando esto ocurre tiene

         * el mismo efecto que el bot?n "Aplicar"

         * @param e EventObject

         */

        public void actionValueChanged(EventObject e) {

                if(isEnableValueChangeEvent()) {

                        ActionEvent ev = new ActionEvent(panel.getApplyButton(), 0, null);

                        actionPerformed(ev);

                }

        }

        /**

         * Obtiene el valor de la variable que informa sobre la activaci?n y desactivaci?n del evento de cambio de valor

         * dentro de un campo de texto

         * @return enableValueChangeEvent

         */

        public boolean isEnableValueChangeEvent() {

                return enableValueChangeEvent;

        }

        /**

         * Asigna el valor para la activaci?n y desactivaci?n del evento de cambio de valor

         * dentro de un campo de texto

         * @param enableValueChangeEvent

         */

        public void setEnableValueChangeEvent(boolean enableValueChangeEvent) {

                this.enableValueChangeEvent = enableValueChangeEvent;

        }

        /**

         * Centra el raster asociado a la capa en al extent del viewport pasado 

         * por par?metro. 

         * @param vp ViewPort

         * @return        Extent para la imagen

         */

        private Extent calcCenterExtent(ViewPort vp) {

                Extent tempExtent = null;

                double widthPxImg, heightPxImg;

                widthPxImg = ((FLyrRasterSE)panel.getLayer()).getPxWidth();

                heightPxImg = ((FLyrRasterSE)panel.getLayer()).getPxHeight();

                if(vp == null || vp.getAdjustedExtent() == null) {

                        vp = new ViewPort(null);

                        Rectangle2D r2d = new Rectangle2D.Double(0, 0, widthPxImg, heightPxImg);

                        vp.setExtent(r2d);

                        tempExtent = new Extent(0, 0, widthPxImg, heightPxImg);

                } else

                        tempExtent = new Extent(vp.getAdjustedExtent());

                double ulX = 0D, ulY = 0D, lrX = 0D, lrY = 0D;

                if(widthPxImg > heightPxImg) {

                        double widthView = tempExtent.maxX() - tempExtent.minX();

                        ulX = tempExtent.minX() + (widthView / 4);

                        lrX = ulX + (widthView / 2);

                        double newAlto = ((heightPxImg * (widthView / 2)) / widthPxImg);

                        double centroY = tempExtent.minY()+((tempExtent.maxY() - tempExtent.minY())/2);

                        ulY = centroY - (newAlto / 2);

                        lrY = centroY + (newAlto / 2);

                } else {

                        double heightView = tempExtent.maxY() - tempExtent.minY();

                        ulY = tempExtent.minY() + (heightView / 4);

                        lrY = ulY + (heightView / 2);

                        double newAncho = ((widthPxImg * (heightView / 2)) / heightPxImg);

                        double centroX = tempExtent.minX()+((tempExtent.maxX() - tempExtent.minX())/2);

                        ulX = centroX - (newAncho / 2);

                        lrX = centroX + (newAncho / 2);

                }

                return new Extent(ulX, ulY, lrX, lrY);

        }

        /**

         * Lee las coordenadas de un fichero de tfw con una transformaci?n y 

         * devuelve la clase AffineTransform con dicha transformaci?n. Esta llamada gestiona los

         * errores producidos actuando en consecuencia. Muestra los mensajes al usuario y retorna

         * null en caso de tener problemas.

         * @param fName Nombre del fichero tfw

         * @return AffineTransform

         */

        private AffineTransform readTfw(String fName) {

                BufferedReader inGrf = null;

                double[] result = new double[6];

                try {

                        inGrf = new BufferedReader(new InputStreamReader(new FileInputStream(fName)));

                        String str = inGrf.readLine();

                        int count = 0;

                        while(str != null && count < 6) {

                                try {

                                        Double value =  new Double(str);

                                        result[count] = value.doubleValue();

                                } catch (NumberFormatException ex) {

                                        RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_file_not_valid"), panel, ex);

                                        return null;

                                }

                                str = inGrf.readLine();

                                count ++;

                        }

                } catch (FileNotFoundException e) {

                        RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_file_not_found"), panel, e);

                        return null;

                } catch (IOException ex) {

                        RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_lectura"), panel, ex);

                        return null;

                }

                return new AffineTransform(result[0], result[1], result[2], result[3], result[4], result[5]);

        }

        /**

         * Filtro para el selector de formatos de georreferenciaci?n

         * @author Nacho Brodin (nachobrodin@gmail.com)

         */

        class GeorreferencingFileFilter extends javax.swing.filechooser.FileFilter {

                private String                                filter;

                public GeorreferencingFileFilter(String fil) {

                        this.filter = fil;

                }

                public boolean accept(File f) {

                        return f.isDirectory() || f.getName().toLowerCase().endsWith("." + filter);

                }

                public String getDescription() {

                        return "." + filter;

                }

        }

}