Application: gvSIG desktop

/* 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.awt.Color;

import java.text.NumberFormat;

import java.util.ArrayList;

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.fmap.MapContext;

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

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

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

import com.iver.cit.gvsig.fmap.core.v02.FConstant;

import com.iver.cit.gvsig.fmap.core.v02.FLabel;

import com.iver.cit.gvsig.fmap.core.v02.FSymbol;

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

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

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

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

import com.iver.cit.gvsig.fmap.rendering.FGraphic;

import com.iver.cit.gvsig.fmap.rendering.FGraphicLabel;

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

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

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

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

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

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

import com.iver.cit.gvsig.graph.solvers.EdgesMemoryDriver;

import com.iver.cit.gvsig.graph.solvers.OneToManySolver;

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

/**

 * @author fjp

 * 

 * Extension to perform ServiceArea calculations. Here you will find code to:

 * 1.- See the distances to every node on the network to one or many point

 * sources. 2.- TODO: Calculate a polyline layer with costs and length

 * calculated to nearest source point. 3.- TODO: Calculate polygons covering

 * those service areas.

 */

public class ServiceAreaExtension extends Extension {

        private int idSymbolLine = -1;

        public void initialize() {

        }

        public void execute(String actionCommand) {

                View v = (View) PluginServices.getMDIManager().getActiveWindow();

                MapControl mapCtrl = v.getMapControl();

                MapContext map = mapCtrl.getMapContext();

                SingleLayerIterator it = new SingleLayerIterator(map.getLayers());

                if (actionCommand.equals("LABEL_NODE_DISTANCES")) {

                        while (it.hasNext()) {

                                FLayer aux = it.next();

                                if (!aux.isActive())

                                        continue;

                                Network net = (Network) aux.getProperty("network");

                                if (net != null) {

                                        GvFlag[] flags = net.getFlags();

                                        if (flags.length == 0) {

                                                JOptionPane.showMessageDialog(null,

                                                                "Primero carga las paradas.");

                                                return;

                                        }

//                                        setVelocities(net);

                                        try {

                                                OneToManySolver solver = new OneToManySolver();

                                                solver.setNetwork(net);

                                                solver.putDestinationsOnNetwork();

                                                GraphicLayer graphicLayer = mapCtrl.getMapContext()

                                                                .getGraphicsLayer();

                                                removeOldLabels(graphicLayer);

                                                for (int i = 0; i < flags.length; i++) {

                                                        solver.setSourceFlag(flags[i]);

                                                        long t1 = System.currentTimeMillis();

                                                        solver.setExploreAllNetwork(true);

                                                        solver.calculate();

                                                        long t2 = System.currentTimeMillis();

                                                        System.out.println("Punto " + i + " de "

                                                                        + flags.length + ". " + (t2 - t1)

                                                                        + " msecs.");

                                                        // Despu?s de esto, los nodos de la red est?n

                                                        // etiquetados con los costes al nodo or?gen

                                                        EdgesMemoryDriver driver = new EdgesMemoryDriver(net);

                                                        FLayer lyr = LayerFactory.createLayer("Edges", driver, null);

                                                        map.getLayers().addLayer(lyr);

                                                        // doLabeling(mapCtrl, net, flags[i]);

                                                }

                                                solver.removeDestinationsFromNetwork();

                                        } catch (GraphException e) {

                                                // TODO Auto-generated catch block

                                                e.printStackTrace();

                                        }

                                        return;

                                }

                        }

                }

        }

        private FSymbol getTextSymbol() {

                FSymbol theSymbol = new FSymbol(FConstant.SYMBOL_TYPE_TEXT);

                theSymbol.setColor(Color.RED);

                theSymbol.setStyle(FConstant.SYMBOL_STYLE_MARKER_CIRCLE);

                theSymbol.setFontColor(Color.BLACK);

                theSymbol.setSizeInPixels(true);

                theSymbol.setSize(9);

                return theSymbol;

        }

        private void removeOldLabels(GraphicLayer gLyr) {

                for (int i = gLyr.getNumGraphics() - 1; i >= 0; i--) {

                        FGraphic gr = gLyr.getGraphic(i);

                        if (gr.equals("N"))

                                gLyr.removeGraphic(i);

                }

        }

        private void doLabeling(MapControl mapControl, Network net, GvFlag flag) {

                GraphicLayer graphicLayer = mapControl.getMapContext()

                                .getGraphicsLayer();

                IGraph g = net.getGraph();

                int idSymbol = graphicLayer.addSymbol(getTextSymbol());

                String tag = "N";

                for (int i = 0; i < g.numVertices(); i++) {

                        GvNode node = g.getNodeByID(i);

                        IGeometry geom = ShapeFactory.createPoint2D(node.getX(), node

                                        .getY());

                        NumberFormat nf = NumberFormat.getInstance();

                        nf.setMaximumFractionDigits(1);

                        String aux = "\u221E"; // infinito

                        if (node.getBestCost() < Double.MAX_VALUE)

                                aux = nf.format(node.getBestCost()) + " - " + nf.format(node.getAccumulatedLength());

                        FGraphicLabel theGLabel = new FGraphicLabel(geom, idSymbol, aux);

                        theGLabel.setObjectTag(tag);

                        theGLabel.getLabel().setJustification(FLabel.CENTER_TOP);

                        graphicLayer.addGraphic(theGLabel);

                }

                mapControl.drawGraphics();

        }

        public boolean isEnabled() {

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

                if (window instanceof View)

                {

                        View v = (View) window;

                MapControl mapCtrl = v.getMapControl();

                        MapContext map = mapCtrl.getMapContext();

                        SingleLayerIterator it = new SingleLayerIterator(map.getLayers());

                        while (it.hasNext())

                        {

                                FLayer aux = it.next();

                                if (!aux.isActive())

                                        continue;

                                Network net = (Network) aux.getProperty("network");

                                if ( net != null)

                                {

                                        return true;

                                }

                        }

                }

                return false;

        }

        public boolean isVisible() {

                IWindow f = PluginServices.getMDIManager()

                 .getActiveWindow();

                if (f == null) {

                    return false;

                }

                if (f instanceof View) {

                        return true;

                }

                return false;

        }

}