Application: gvSIG desktop

package com.iver.cit.gvsig.project.documents.view.snapping.snappers;

import java.awt.Graphics;

import java.awt.geom.Point2D;

import com.iver.andami.PluginServices;

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

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

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

import com.iver.cit.gvsig.project.documents.view.snapping.AbstractSnapper;

import com.iver.cit.gvsig.project.documents.view.snapping.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, IGeometry geom,

        double tolerance, Point2D lastPointEntered) {

        Point2D resul = null;

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

        double minDist = tolerance;

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

            if (handlers[j] instanceof ICenterHandler) {

                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 PluginServices.getText(this, "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());

    }

}