Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.app.project.documents.view.toolListeners.snapping.snappers;

import java.awt.geom.Point2D;

import org.gvsig.fmap.geom.Geometry;

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

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

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

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

import org.gvsig.fmap.mapcontrol.PrimitivesDrawer;

import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.ISnapperVectorial;

import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.impl.AbstractSnapper;

import org.gvsig.i18n.Messages;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Central point snapper.

 *

 * @author Vicente Caballero Navarro

 */

public class CentroidPointSnapper extends AbstractSnapper

    implements ISnapperVectorial {

    private static final Logger LOGGER = LoggerFactory.getLogger(CentroidPointSnapper.class);

    @Override

    public Point2D getSnapPoint(Point2D point, Geometry geom,

        double tolerance, Point2D lastPointEntered) {

        Point2D resul = null;

        Point centroid;

        try {

            centroid = geom.centroid();

            Point2D.Double pointCentroid = new Point2D.Double(centroid.getX(),centroid.getY());

            double dist = pointCentroid.distance(point);

            if ((dist < tolerance)) {

                resul = pointCentroid;

            }

        } catch (Exception ex) {

            LOGGER.warn("Can't get centroid.", ex);

        }

        return resul;

    }

    @Override

    public String getToolTipText() {

        return Messages.getText("_Centroid_point");

    }

    @Override

    public void draw(PrimitivesDrawer primitivesDrawer, Point2D pPixels) {

            primitivesDrawer.setColor(getColor());

        int half = getSizePixels() / 2;

        primitivesDrawer.drawOval((int) (pPixels.getX() - half),

            (int) (pPixels.getY() - half), getSizePixels(), getSizePixels());

    }

}