| gvSIG desktop 1

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

 *

 * Copyright (C) 2004 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.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.graph;

import java.io.File;

import javax.swing.JOptionPane;

import com.iver.andami.PluginServices;

import com.iver.andami.plugins.Extension;

import com.iver.andami.ui.mdiManager.IWindow;

import com.iver.cit.gvsig.ProjectExtension;

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

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

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

import com.iver.cit.gvsig.fmap.core.FShape;

import com.iver.cit.gvsig.fmap.edition.EditionException;

import com.iver.cit.gvsig.fmap.edition.writers.dbf.DbfWriter;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

import com.iver.cit.gvsig.fmap.layers.SingleLayerIterator;

import com.iver.cit.gvsig.graph.core.NetworkLoader;

import com.iver.cit.gvsig.graph.core.NetworkWriter;

import com.iver.cit.gvsig.project.Project;

import com.iver.cit.gvsig.project.documents.table.ProjectTable;

import com.iver.cit.gvsig.project.documents.view.IProjectView;

import com.iver.cit.gvsig.project.documents.view.gui.IView;

import com.iver.cit.gvsig.project.documents.view.gui.View;

import edu.uci.ics.jung.graph.Graph;

public class NetworkExtension extends Extension {

//        private String fieldType;

//        private String fieldDist;

//        private String fieldSense;

        public void initialize() {

        }

        public void execute(String actionCommand) {

                IView view = (View) PluginServices.getMDIManager().getActiveWindow();

                MapControl mapControl = view.getMapControl();

                MapContext map = mapControl.getMapContext();

                SingleLayerIterator lyrIterator = new SingleLayerIterator(map

                                .getLayers());

                while (lyrIterator.hasNext()) {

                        FLayer lyr = lyrIterator.next();                        

                        if ((lyr.isActive()) && (lyr instanceof FLyrVect))

                        {

                                FLyrVect lyrVect = (FLyrVect) lyr;

                                int shapeType;

                                try {

                                        shapeType = lyrVect.getShapeType();

                                        if (shapeType == FShape.LINE)

                                        {

                                                if (actionCommand.equalsIgnoreCase("GENERAR_RED")) {

                                                        generateNetwork(lyrVect);

                                                }

                                                if (actionCommand.equalsIgnoreCase("LOAD_RED")) {

                                                        loadNetwork(lyrVect);

                                                }                                                

                                        }

                                } catch (DriverException e) {

                                        // TODO Auto-generated catch block

                                        e.printStackTrace();

                                }

                        }

                }

        }

        /**

         * Suponemos que en el proyecto hay 2 tablas, una con los nodos

         * y otro con los edges.

         * Cargamos la red a partir de esas tablas y se la 

         * asociamos a la capa. A partir de ah?, nuestras

         * herramientas pueden ver si la capa activa tiene

         * asociada o no una red y ponerse visibles / invisibles

         * Otra posible soluci?n es llevar nuestra propia lista de capas

         * con red (que ser? peque?ita), y as?, en lugar de recorrer

         * el MapContext, recorremos nuestra lista para ver la

         * capa que est? activa y con red. Me empieza a preocupar

         * que todas las herramientas iteren por la colecci?n de

         * capas para habilitarse/deshabilitarse:

         * 100 herramientas * 100 capas = 10.000 comprobaciones

         * Si comprobar algo cuesta 1 mseg => 10 segundos!!! 

         * @param lyrVect

         */

        private void loadNetwork(FLyrVect lyrVect) {

                // Aqu? mostrar un di?lgo para seleccionar las tablas

                // de nodos y edges

                // y hacer un mapping (si es necesario) entre los 

                // nombres de campos

                String tableNodes = "Nodes";

                String tableEdges = "Edges";

                ProjectExtension projectExt = (ProjectExtension) PluginServices.getExtension(ProjectExtension.class);

                ProjectTable ptNodes = projectExt.getProject().getTable(tableNodes);

                ProjectTable ptEdges = projectExt.getProject().getTable(tableEdges);

                SelectableDataSource sdsNodes = ptNodes.getModelo().getRecordset();

                SelectableDataSource sdsEdges = ptEdges.getModelo().getRecordset();        

                NetworkLoader netLoader = new NetworkLoader();

                netLoader.setNodeReader(sdsNodes);

                netLoader.setEdgeReader(sdsEdges);

                Graph g = netLoader.loadNetwork();

                System.out.println("Num nodos=" + g.numVertices() + " numEdges = " + g.numEdges());

                lyrVect.setProperty("network", g);

        }

        private void generateNetwork(FLyrVect lyr) {

                NetworkWriter netBuilder = new NetworkWriter();

                // Por ahora, a pelo, pero hay que sacar un cuadro

                // de di?logo para hecer el mapping.

                // Tambi?n un cuadro de di?logo para seleccionar

                // en qu? tablas quiere escribir, y su formato

                // (dbf, postgres, etc)

                String fieldType = "tipored"; String fieldDist = "length"; String fieldSense = "sen";

                try {

                        netBuilder.setLayer(lyr, fieldType, fieldDist, fieldSense);

                        DbfWriter nodeWriter = new DbfWriter();

                        nodeWriter.setFile(new File("c:/nodes.dbf"));

                        DbfWriter edgeWriter = new DbfWriter();

                        edgeWriter.setFile(new File("c:/edges.dbf"));

                        netBuilder.setEdgeWriter(edgeWriter);

                        netBuilder.setNodeWriter(nodeWriter);

                        netBuilder.writeNetwork();

                } catch (DriverException e1) {

                        // TODO Auto-generated catch block

                        e1.printStackTrace();

                } catch (EditionException e1) {

                        // TODO Auto-generated catch block

                        e1.printStackTrace();

                }

                JOptionPane.showMessageDialog(null, "Hecho. ");

        }

        public boolean isEnabled() {

                return true;

        }

        public boolean isVisible() {

                IWindow f = PluginServices.getMDIManager().getActiveWindow();

                if (f == null) {

                        return false;

                }

                if (f instanceof View) {

                        View vista = (View) f;

                        IProjectView model = vista.getModel();

                        MapContext mapa = model.getMapContext();

                        FLayer[] activeLayers = mapa.getLayers().getActives();

                        if (activeLayers.length > 0)

                                if (activeLayers[0] instanceof FLyrVect)

                                        return true;

                }

                return false;

        }

}