| 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.gui.cad.tools;

import java.awt.Graphics;

import java.awt.event.InputEvent;

import java.awt.geom.Point2D;

import java.util.ArrayList;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.CADExtension;

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

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

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

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

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

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

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

import com.iver.cit.gvsig.gui.cad.DefaultCADTool;

import com.iver.cit.gvsig.gui.cad.exception.CommandException;

import com.iver.cit.gvsig.gui.cad.tools.smc.EquidistanceCADToolContext;

import com.iver.cit.gvsig.gui.cad.tools.smc.EquidistanceCADToolContext.EquidistanceCADToolState;

import com.iver.cit.gvsig.layers.VectorialLayerEdited;

import com.vividsolutions.jts.algorithm.CGAlgorithms;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.GeometryFactory;

import com.vividsolutions.jts.geom.LineString;

import com.vividsolutions.jts.geom.LinearRing;

import com.vividsolutions.jts.geom.Point;

import com.vividsolutions.jts.simplify.TopologyPreservingSimplifier;

/**

 * Herramienta para crear una geometr?a equidistante a otra.

 *

 * @author Vicente Caballero Navarro

 */

public class EquidistanceCADTool extends DefaultCADTool {

    protected EquidistanceCADToolContext _fsm;

    protected Point2D firstPoint=new Point2D.Double(800000,4500000);

    protected Point2D secondPoint=new Point2D.Double(810000,4500000);

        protected double distance=10;

        private double distancePos=java.lang.Double.MAX_VALUE;

        private LineString distanceLine;

        /**

     * Crea un nuevo EquidistanceCADTool.

     */

    public EquidistanceCADTool() {

    }

    /**

     * M?todo de inicio, para poner el c?digo de todo lo que se requiera de una

     * carga previa a la utilizaci?n de la herramienta.

     */

    public void init() {

        _fsm = new EquidistanceCADToolContext(this);

    }

    private Coordinate[] getParallel(Point2D[] points,double distance) {

            Point2D[] pper=new Point2D[2];

            double angle=Math.toRadians(90)+UtilFunctions.getAngle(points[0],points[1]);

            pper[0]=UtilFunctions.getPoint(points[0],angle,distance);

            pper[1]=UtilFunctions.getPoint(points[1],angle,distance);

            Coordinate[] result=new Coordinate[2];

            result[0]=new Coordinate(pper[0].getX(),pper[0].getY());

            result[1]=new Coordinate(pper[1].getX(),pper[1].getY());

            return result;

    }

   /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.CADTool#transition(com.iver.cit.gvsig.fmap.layers.FBitSet, double, double)

     */

    public void transition(double x, double y, InputEvent event) {

        _fsm.addPoint(x, y, event);

    }

    /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.CADTool#transition(com.iver.cit.gvsig.fmap.layers.FBitSet, double)

     */

    public void transition(double d) {

        _fsm.addValue(d);

    }

    /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.CADTool#transition(com.iver.cit.gvsig.fmap.layers.FBitSet, java.lang.String)

     */

    public void transition(String s) throws CommandException {

            if (!super.changeCommand(s)){

                    _fsm.addOption(s);

            }

    }

    /**

     * DOCUMENT ME!

     */

    public void selection() {

       ArrayList selectedRows=getSelectedRows();

        if (selectedRows.size() == 0 && !CADExtension.getCADTool().getClass().getName().equals("com.iver.cit.gvsig.gui.cad.tools.SelectionCADTool")) {

            CADExtension.setCADTool("_selection",false);

            ((SelectionCADTool) CADExtension.getCADTool()).setNextTool(

                "_Equidistance");

        }

    }

    /**

     * Equivale al transition del prototipo pero sin pasarle como par?metro el

     * editableFeatureSource que ya estar? creado.

     *

     * @param x par?metro x del punto que se pase en esta transici?n.

     * @param y par?metro y del punto que se pase en esta transici?n.

     */

    public void addPoint(double x, double y,InputEvent event) {

            EquidistanceCADToolState actualState = (EquidistanceCADToolState) _fsm.getPreviousState();

            String status = actualState.getName();

            if (status.equals("Equidistance.Distance")) {

                    firstPoint = new Point2D.Double(x, y);

            } else if (status.equals("Equidistance.SecondPointDistance")) {

                    secondPoint = new Point2D.Double(x,y);

                    distance=secondPoint.distance(firstPoint);

            } else if (status.equals("Equidistance.Position")) {

                    ArrayList selectedRow = getSelectedRows();

                    ArrayList selectedRowAux=new ArrayList();

                    VectorialLayerEdited vle = getVLE();

                    VectorialEditableAdapter vea = vle.getVEA();

                    PluginServices.getMDIManager().setWaitCursor();

                    vea.startComplexRow();

                    for (int i = 0; i < selectedRow.size(); i++) {

                            DefaultRowEdited row = (DefaultRowEdited) selectedRow

                            .get(i);

                            DefaultFeature fea = (DefaultFeature) row.getLinkedRow()

                            .cloneRow();

                            IGeometry geometry=compute(fea,new Point2D.Double(x,y));

                            addGeometry(geometry);

                    }

                    vea.endComplexRow(getName());

                    vle.setSelectionCache(VectorialLayerEdited.SAVEPREVIOUS, selectedRowAux);

                    //clearSelection();

                    //selectedRow.addAll(selectedRowAux);

                    PluginServices.getMDIManager().restoreCursor();

            }

    }

    protected IGeometry compute(DefaultFeature fea, Point2D position){

                IGeometry geometry = fea.getGeometry();

                int typeGeometry = geometry.getGeometryType();

                Geometry g = geometry.toJTSGeometry();

                GeometryFactory factory=g.getFactory();

            Coordinate[] c2 = new Coordinate[2];

                Geometry g2 = null;

                Coordinate coordinatePosition=new Coordinate(position.getX(),position.getY());

                Point pPos=factory.createPoint(coordinatePosition);

                switch (typeGeometry) {

                case FShape.LINE:

                        LineString lR =factory.createLineString(g.getCoordinates());

                        g = TopologyPreservingSimplifier.simplify(lR, 10d);

                        Geometry gLine = g.getGeometryN(0);

                        Coordinate[] coordinatesLine = gLine.getCoordinates();

                        int numPointsLine = gLine.getNumPoints();

                        if (numPointsLine < 1)

                                return null;

                        LineString[] lineStrings = new LineString[numPointsLine - 1];

                        for (int j = 1; j < numPointsLine; j = j + 1) {

                                c2[0] = coordinatesLine[j - 1];

                                c2[1] = coordinatesLine[j];

                                LineString lS=factory.createLineString(c2);

                                if (lS.distance(pPos)<distancePos) {

                                        distancePos=lS.distance(pPos);

                                        distanceLine=(LineString)factory.createGeometry(lS);

                                }

                        }

                        setDistanceLine(coordinatePosition);

                        for (int j = 1; j < numPointsLine; j = j + 1) {

                                c2[0] = coordinatesLine[j - 1];

                                c2[1] = coordinatesLine[j];

                                Point2D[] points = new Point2D[2];

                                points[0] = new Point2D.Double(c2[0].x, c2[0].y);

                                points[1] = new Point2D.Double(c2[1].x, c2[1].y);

                                lineStrings[j - 1] = factory.createLineString(

                                                getParallel(points, distance));

                        }

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

                                Coordinate coord = lineStrings[i].getCoordinateN(0);

                                Point2D p1 = new Point2D.Double(coord.x, coord.y);

                                coord = lineStrings[i].getCoordinateN(1);

                                Point2D p2 = new Point2D.Double(coord.x, coord.y);

                                coord = lineStrings[i + 1].getCoordinateN(0);

                                Point2D p3 = new Point2D.Double(coord.x, coord.y);

                                coord = lineStrings[i + 1].getCoordinateN(1);

                                Point2D p4 = new Point2D.Double(coord.x, coord.y);

                                Point2D intersection = UtilFunctions.getIntersection(p1, p2,

                                                p3, p4);

                                Coordinate[] coords1 = new Coordinate[2];

                                coords1[0] = lineStrings[i].getCoordinateN(0);

                                coords1[1] = new Coordinate(intersection.getX(), intersection

                                                .getY());

                                lineStrings[i] = factory.createLineString(coords1);

                                Coordinate[] coords2 = new Coordinate[2];

                                coords2[0] = coords1[1];

                                coords2[1] = lineStrings[i + 1].getCoordinateN(1);

                                lineStrings[i + 1] = factory.createLineString(

                                                coords2);

                        }

                        g2 = factory.createMultiLineString(lineStrings);

                        return FConverter.jts_to_igeometry(g2);

                case FShape.POLYGON:

                case FShape.CIRCLE:

                case FShape.ELLIPSE:

                        g = TopologyPreservingSimplifier.simplify(g, 10d);

                        Geometry gPolygon = g.getGeometryN(0);

                        setDistancePolygon(gPolygon,pPos);

                        Coordinate[] coordinates = gPolygon.getCoordinates();

                        int numPointsPolygon = gPolygon.getNumPoints();

                        if (numPointsPolygon < 2)

                                return null;

                        LineString[] polygonStrings = new LineString[numPointsPolygon];

                        for (int j = 1; j < numPointsPolygon; j = j + 1) {

                                c2[0] = coordinates[j - 1];

                                c2[1] = coordinates[j];

                                Point2D[] points = new Point2D[2];

                                points[0] = new Point2D.Double(c2[0].x, c2[0].y);

                                points[1] = new Point2D.Double(c2[1].x, c2[1].y);

                                polygonStrings[j - 1] = factory.createLineString(

                                                getParallel(points, distance));

                        }

                        for (int i = 0; i < polygonStrings.length - 2; i++) {

                                Coordinate coord = polygonStrings[i].getCoordinateN(0);

                                Point2D p1 = new Point2D.Double(coord.x, coord.y);

                                coord = polygonStrings[i].getCoordinateN(1);

                                Point2D p2 = new Point2D.Double(coord.x, coord.y);

                                coord = polygonStrings[i + 1].getCoordinateN(0);

                                Point2D p3 = new Point2D.Double(coord.x, coord.y);

                                coord = polygonStrings[i + 1].getCoordinateN(1);

                                Point2D p4 = new Point2D.Double(coord.x, coord.y);

                                Point2D intersection = UtilFunctions.getIntersection(p1, p2,

                                                p3, p4);

                                Coordinate[] coords1 = new Coordinate[2];

                                coords1[0] = polygonStrings[i].getCoordinateN(0);

                                coords1[1] = new Coordinate(intersection.getX(), intersection

                                                .getY());

                                polygonStrings[i] = factory.createLineString(

                                                coords1);

                                Coordinate[] coords2 = new Coordinate[2];

                                coords2[0] = coords1[1];

                                coords2[1] = polygonStrings[i + 1].getCoordinateN(1);

                                polygonStrings[i + 1] = factory.createLineString(

                                                coords2);

                        }

                        // /////////////

                        Coordinate coord = polygonStrings[0].getCoordinateN(0);

                        Point2D p1 = new Point2D.Double(coord.x, coord.y);

                        coord = polygonStrings[0].getCoordinateN(1);

                        Point2D p2 = new Point2D.Double(coord.x, coord.y);

                        coord = polygonStrings[polygonStrings.length - 2].getCoordinateN(0);

                        Point2D p3 = new Point2D.Double(coord.x, coord.y);

                        coord = polygonStrings[polygonStrings.length - 2].getCoordinateN(1);

                        Point2D p4 = new Point2D.Double(coord.x, coord.y);

                        Point2D intersection = UtilFunctions

                                        .getIntersection(p1, p2, p3, p4);

                        Coordinate[] coords1 = new Coordinate[2];

                        coords1[0] = polygonStrings[polygonStrings.length - 2]

                                        .getCoordinateN(1);

                        coords1[1] = new Coordinate(intersection.getX(), intersection

                                        .getY());

                        polygonStrings[polygonStrings.length - 1] = factory

                                        .createLineString(coords1);

//                        LineString[] pol=new LineString[polygonStrings.length-1];

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

//                                pol[i]=polygonStrings[i];

//                        }

                        Coordinate[] coords2 = new Coordinate[2];

                        coords2[0] = coords1[1];

                        coords2[1] = polygonStrings[0].getCoordinateN(1);

                        polygonStrings[0] = factory.createLineString(coords2);

                        // ////////////////////////////////

                        Geometry geometryCollection = factory

                                        .createGeometryCollection(polygonStrings);

                        LinearRing linearRing = factory.createLinearRing(

                                        geometryCollection.getCoordinates());

                        LinearRing[] holes = new LinearRing[1];

                        holes[0] = factory.createLinearRing(new Coordinate[0]);

                        g2 = factory.createPolygon(linearRing, holes);

                        return FConverter.jts_to_igeometry(g2);

                case FShape.MULTIPOINT:

                case FShape.POINT:

                        break;

                default:

                        break;

                }

                return null;

        }

    private void setDistanceLine(Coordinate position) {

            Coordinate pStart=distanceLine.getCoordinateN(0);

            Coordinate pEnd=distanceLine.getCoordinateN(distanceLine.getNumPoints()-1);

            int pos=CGAlgorithms.computeOrientation(pStart,pEnd,position);

                   if (pos>0)

                            distance=Math.abs(distance);

                    else

                            distance=-Math.abs(distance);

                   distancePos=java.lang.Double.MAX_VALUE;

                   distanceLine=null;

        }

        private void setDistancePolygon(Geometry polygon, Geometry position) {

                boolean intersects=polygon.intersects(position);

                if (intersects)

                        distance=-Math.abs(distance);

                else

                        distance=Math.abs(distance);

        }

        /**

     * M?todo para dibujar la lo necesario para el estado en el que nos

     * encontremos.

     *

     * @param g Graphics sobre el que dibujar.

     * @param x par?metro x del punto que se pase para dibujar.

     * @param y par?metro x del punto que se pase para dibujar.

     */

    public void drawOperation(Graphics g, double x, double y) {

    }

    /**

         * Add a diferent option.

         *

         * @param s

         *            Diferent option.

         */

    public void addOption(String s) {

//            EquidistanceCADToolState actualState = (EquidistanceCADToolState) _fsm

//                                .getPreviousState();

//                String status = actualState.getName();

//                if (status.equals("Equidistance.Distance")) {

//                        distance=java.lang.Double.parseDouble(s);

//                }

    }

    /*

         * (non-Javadoc)

         *

         * @see com.iver.cit.gvsig.gui.cad.CADTool#addvalue(double)

         */

    public void addValue(double d) {

            EquidistanceCADToolState actualState = (EquidistanceCADToolState) _fsm

                .getPreviousState();

            String status = actualState.getName();

            if (status.equals("Equidistance.Distance")) {

                    distance=d;

            }

    }

        public String getName() {

                return PluginServices.getText(this,"Equidistance_");

        }

        public String toString() {

                return "_Equidistance";

        }

        public boolean isApplicable(int shapeType) {

                if (shapeType==FShape.POINT ||

                                shapeType==FShape.MULTIPOINT) {

                        return false;

                }

                return true;

        }

}