Application: gvSIG desktop » gvSIG tools: Vector editing

package org.gvsig.vectorediting.lib.prov.editvertex.operation;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

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.primitive.Line;

import org.gvsig.fmap.geom.primitive.PeriEllipse;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.geom.primitive.Primitive;

import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol;

import org.gvsig.vectorediting.lib.spi.DefaultDrawingStatus;

import org.gvsig.vectorediting.lib.spi.EditingProviderLocator;

import org.gvsig.vectorediting.lib.spi.EditingProviderManager;

public class EllipseEditVertexOperation implements EditVertexOperation {

    public EllipseEditVertexOperation() {

        // TODO Auto-generated constructor stub

    }

    public Geometry insertVertex(Primitive geom, int index)

        throws CreateGeometryException {

        return null;

    }

    public Geometry removeVertex(Primitive geom, int index)

        throws CreateGeometryException {

        return null;

    }

    public Geometry moveVertex(Primitive geom, int index, Point point) throws CreateGeometryException, GeometryOperationNotSupportedException, GeometryOperationException {

        GeometryManager geometryManager = GeometryLocator.getGeometryManager();

        PeriEllipse original = (PeriEllipse)geom;

        PeriEllipse result = (PeriEllipse) original.cloneGeometry();

        if(index == 0){

            result.setPoints(point, original.getAxis1End(), original.getAxis2Dist());

        } else if (index == 1){

            result.setPoints(original.getAxis1Start(), point, original.getAxis2Dist());

        } else if (index == 2){

            Point axis1Start = original.getAxis1Start();

            Point axis1End = original.getAxis1End();

            Point center = geometryManager.createPoint(

                (axis1Start.getX()+axis1End.getX())/2,

                (axis1Start.getY()+axis1End.getY())/2,

                geom.getGeometryType().getSubType());

            result.setPoints(original.getAxis1Start(), original.getAxis1End(), center.distance(point));

        }

        return result;

    }

    public List<Point> getVertexesList(Primitive geom) throws CreateGeometryException, GeometryOperationNotSupportedException, GeometryOperationException {

        GeometryManager geometryManager = GeometryLocator.getGeometryManager();

        ArrayList<Point> vertexList = new ArrayList<Point>();

        PeriEllipse ellipse = (PeriEllipse) geom;

        Point axis1Start = ellipse.getAxis1Start();

        vertexList.add(axis1Start);

        Point axis1End = ellipse.getAxis1End();

        vertexList.add(axis1End);

        Point center = geometryManager.createPoint(

            (axis1Start.getX()+axis1End.getX())/2,

            (axis1Start.getY()+axis1End.getY())/2,

            geom.getGeometryType().getSubType());

        double angle = getAngle(axis1Start, axis1End);

        vertexList.add(geometryManager.createPoint(

            center.getX() + ellipse.getAxis2Dist()*Math.cos(angle+Math.PI/2),

            center.getY() + ellipse.getAxis2Dist()*Math.sin(angle+Math.PI/2),

            geom.getGeometryType().getSubType()));

        return vertexList;

    }

    public int getNumVertex(Primitive geom) {

        return 3;

    }

    public boolean canInsertVertex(Primitive geom, int index) {

        return false;

    }

    public boolean canRemoveVertex(Primitive geom, int index) {

        return false;

    }

    public boolean canMoveVertex(int index, Point point) {

        return true;

    }

    public double getAngle(Point start, Point end)

        throws GeometryOperationNotSupportedException,

        GeometryOperationException {

        double angle =

            Math.acos((end.getX() - start.getX()) / start.distance(end));

        if (start.getY() > end.getY()) {

            angle = -angle;

        }

        if (angle < 0) {

            angle += (2 * Math.PI);

        }

        return angle;

    }

    public void addToDrawingStatus(DefaultDrawingStatus drawingStatus,

        Primitive primitive) throws CreateGeometryException, GeometryOperationNotSupportedException, GeometryOperationException {

        GeometryManager geometryManager = GeometryLocator.getGeometryManager();

        EditingProviderManager editingProviderManager =

            EditingProviderLocator.getProviderManager();

        ISymbol auxiliaryLineSymbolEditing =

            editingProviderManager.getSymbol("auxiliary-line-symbol-editing");

        ISymbol lineSymbolEditing =

            editingProviderManager.getSymbol("line-symbol-editing");

        PeriEllipse ellipse = (PeriEllipse)primitive;

        Point axis1Start = ellipse.getAxis1Start();

        Point axis1End = ellipse.getAxis1End();

        Line axis1Line = geometryManager.createLine(primitive.getGeometryType().getSubType());

        axis1Line.setPoints(axis1Start,axis1End);

        drawingStatus.addStatus(axis1Line, auxiliaryLineSymbolEditing, "");

        Line axis2Line = geometryManager.createLine(primitive.getGeometryType().getSubType());

        Point center = geometryManager.createPoint(

            (axis1Start.getX()+axis1End.getX())/2,

            (axis1Start.getY()+axis1End.getY())/2,

            primitive.getGeometryType().getSubType());

        double angle = getAngle(axis1Start, axis1End);

        Point axis2Point1 = geometryManager.createPoint(

        center.getX() + ellipse.getAxis2Dist()*Math.cos(angle+Math.PI/2),

        center.getY() + ellipse.getAxis2Dist()*Math.sin(angle+Math.PI/2),

        primitive.getGeometryType().getSubType());

        Point axis2Point2 = geometryManager.createPoint(

        center.getX() - ellipse.getAxis2Dist()*Math.cos(angle+Math.PI/2),

        center.getY() - ellipse.getAxis2Dist()*Math.sin(angle+Math.PI/2),

        primitive.getGeometryType().getSubType());

        axis2Line.setPoints(axis2Point1,

            axis2Point2);

        drawingStatus.addStatus(axis2Line, auxiliaryLineSymbolEditing, "");

        drawingStatus.addStatus(primitive, lineSymbolEditing, "");

    }

}