| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.editing.gui.cad.tools;

import java.awt.event.InputEvent;

import java.awt.geom.Point2D;

import java.util.ArrayList;

import com.vividsolutions.jts.algorithm.CGAlgorithms;

import com.vividsolutions.jts.geom.Coordinate;

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;

import org.gvsig.andami.PluginServices;

import org.gvsig.editing.CADExtension;

import org.gvsig.editing.gui.cad.DefaultCADTool;

import org.gvsig.editing.gui.cad.exception.CommandException;

import org.gvsig.editing.gui.cad.tools.smc.EquidistanceCADToolContext;

import org.gvsig.editing.gui.cad.tools.smc.EquidistanceCADToolContext.EquidistanceCADToolState;

import org.gvsig.editing.layers.VectorialLayerEdited;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureSelection;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.operation.tojts.ToJTS;

import org.gvsig.fmap.geom.util.Converter;

import org.gvsig.fmap.geom.util.UtilFunctions;

import org.gvsig.fmap.mapcontrol.MapControlDrawer;

import org.gvsig.tools.dispose.DisposableIterator;

/**

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

 * 

 * @author Vicente Caballero Navarro

 */

public class EquidistanceCADTool extends DefaultCADTool {

    private EquidistanceCADToolContext _fsm;

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

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

    private 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() {

        FeatureSet selection = null;

        try {

            selection = (FeatureSet) getVLE().getFeatureStore().getSelection();

            if (selection.getSize() == 0

                && !CADExtension

                    .getCADTool()

                    .getClass()

                    .getName()

                    .equals("com.iver.cit.gvsig.gui.cad.tools.SelectionCADTool")) {

                CADExtension.setCADTool("_selection", false);

                ((SelectionCADTool) CADExtension.getCADTool())

                    .setNextTool("_Equidistance");

            }

        } catch (ReadException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (DataException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    /**

     * 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")) {

                    VectorialLayerEdited vle = getVLE();

                    FeatureStore featureStore = null;

                    try {

                        featureStore = vle.getFeatureStore();

                    } catch (ReadException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                    }

                    ArrayList selectedRowAux = new ArrayList();

                    DisposableIterator iterator = null;

                    try {

                        iterator =

                            ((FeatureSelection) featureStore.getSelection())

                                .iterator();

                        PluginServices.getMDIManager().setWaitCursor();

                        featureStore.beginEditingGroup(getName());

                        while (iterator.hasNext()) {

                            Feature feature = (Feature) iterator.next();

                            Geometry geometry =

                                compute(feature, new Point2D.Double(x, y));

                            insertAndSelectGeometry(geometry);

                        }

                        featureStore.endEditingGroup();

                    } catch (DataException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                    } catch (CreateGeometryException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                    } finally {

                        if (iterator != null) {

                            iterator.dispose();

                        }

                    }

                    PluginServices.getMDIManager().restoreCursor();

                }

    }

    private Geometry compute(Feature fea, Point2D position)

        throws CreateGeometryException {

        Geometry geometry = (fea.getDefaultGeometry()).cloneGeometry();

        int typeGeometry = geometry.getType();

        com.vividsolutions.jts.geom.Geometry g = null;

        try {

            g =

                (com.vividsolutions.jts.geom.Geometry) geometry

                    .invokeOperation(ToJTS.CODE, null);

        } catch (GeometryOperationNotSupportedException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (GeometryOperationException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        // com.vividsolutions.jts.geom.Geometry g = geometry.toJTSGeometry();

        GeometryFactory factory = g.getFactory();

        Coordinate[] c2 = new Coordinate[2];

        com.vividsolutions.jts.geom.Geometry g2 = null;

        Coordinate coordinatePosition =

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

        Point pPos = factory.createPoint(coordinatePosition);

        switch (typeGeometry) {

        case Geometry.TYPES.CURVE:

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

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

            com.vividsolutions.jts.geom.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 Converter.jtsToGeometry(g2);

        case Geometry.TYPES.SURFACE:

        case Geometry.TYPES.CIRCLE:

        case Geometry.TYPES.ELLIPSE:

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

            com.vividsolutions.jts.geom.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);

            Coordinate[] coords2 = new Coordinate[2];

            coords2[0] = coords1[1];

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

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

            com.vividsolutions.jts.geom.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 Converter.jtsToGeometry(g2);

        case Geometry.TYPES.MULTIPOINT:

        case Geometry.TYPES.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(

        com.vividsolutions.jts.geom.Geometry polygon,

        com.vividsolutions.jts.geom.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(MapControlDrawer renderer, 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 == Geometry.TYPES.POINT

            || shapeType == Geometry.TYPES.MULTIPOINT) {

            return false;

        }

        return true;

    }

}