| gvSIG desktop 1

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

import java.awt.Graphics;

import java.awt.geom.Point2D;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.handler.CenterHandler;

import org.gvsig.fmap.geom.handler.Handler;

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

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

/**

 * Central point snapper.

 *

 * @author Vicente Caballero Navarro

 */

public class CentralPointSnapper extends AbstractSnapper

    implements ISnapperVectorial {

        /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.snapping.ISnapper#getSnapPoint(Point2D point,

     * IGeometry geom,double tolerance, Point2D lastPointEntered)

     */

        public Point2D getSnapPoint(Point2D point, Geometry geom,

        double tolerance, Point2D lastPointEntered) {

        Point2D resul = null;

        Handler[] handlers = geom.getHandlers(Geometry.SELECTHANDLER);

        double minDist = tolerance;

        for (int j = 0; j < handlers.length; j++) {

            if (handlers[j] instanceof CenterHandler) {

                Point2D handlerPoint = handlers[j].getPoint();

                double dist = handlerPoint.distance(point);

                if ((dist < minDist)) {

                    resul = handlerPoint;

                    minDist = dist;

                }

            }

        }

        return resul;

    }

        /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.snapping.ISnapper#getToolTipText()

     */

    public String getToolTipText() {

        return "central_point";

    }

    /* (non-Javadoc)

     * @see com.iver.cit.gvsig.gui.cad.snapping.ISnapper#draw(java.awt.Graphics, java.awt.geom.Point2D)

     */

    public void draw(Graphics g, Point2D pPixels) {

        g.setColor(getColor());

        int half = getSizePixels() / 2;

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

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

    }

}