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.fmap.mapcontrol.tools.Behavior;

import java.awt.Color;

import java.awt.Rectangle;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

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

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontrol.MapControlDrawer;

import org.gvsig.fmap.mapcontrol.tools.BehaviorException;

import org.gvsig.fmap.mapcontrol.tools.Events.MeasureEvent;

import org.gvsig.fmap.mapcontrol.tools.Listeners.AbstractCircleListener;

import org.gvsig.fmap.mapcontrol.tools.Listeners.PolylineListener;

import org.gvsig.fmap.mapcontrol.tools.Listeners.ToolListener;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * <p>

 * Behavior that allows user to draw a circle on the image of the associated

 * <code>MapControl</code> using a

 * {@link PolylineListener PolylineListener}.</p>

 *

 * @author Laura

 * @author Pablo Piqueras Bartolom?

 */

public class CircleBehavior extends Behavior {

    private static final Logger logger = LoggerFactory.getLogger(CircleBehavior.class);

    /**

     * First point set, that represents the center of the circle.

     */

    protected Point2D m_FirstPoint;

    /**

     * Second point set, that permits calculate the radius of the circle.

     */

    protected Point2D m_LastPoint;

    /**

     * Tool listener used to work with the <code>MapControl</code> object.

     *

     * @see #getListener()

     * @see #setListener(ToolListener)

     */

    private AbstractCircleListener listener;

    /**

     * Determines if user setting the radius of the circle (with one click of

     * the button 1 of the mouse), or not.

     */

    protected boolean isClicked = false;

    /**

     * <p>

     * Creates a new behavior for selecting circle areas.</p>

     *

     * @param zili listener used to permit this object to work with the

     * associated <code>MapControl</code>

     */

    public CircleBehavior(AbstractCircleListener zili) {

        listener = zili;

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#paintComponent(java.awt.Graphics)

     */

    @Override

    public void paintComponent(MapControlDrawer mapControlDrawer) {

        double radio;

        mapControlDrawer.setColor(Color.black);

        if ((m_FirstPoint != null) && (m_LastPoint != null)) {

            ViewPort vp = getMapControl().getMapContext().getViewPort();

            Point2D p1 = vp.toMapPoint(m_FirstPoint);

            Point2D p2 = vp.toMapPoint(m_LastPoint);

            radio = p1.distance(p2);

            if (radio > 0.0) {

                Arc arc = null;

                arc = createArc(p1.getX(), p1.getY(),

                        radio, 0, Math.PI * 2);

                if (arc != null) {

                    mapControlDrawer.draw(arc);

                }

            }

        }

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#mousePressed(java.awt.event.MouseEvent)

     */

    @Override

    public void mousePressed(MouseEvent e) {

        if (this.isMyButton(e)) {

            m_FirstPoint = e.getPoint();

            isClicked = true;

            getMapControl().repaint();

            if (listener.cancelDrawing()) {

                getMapControl().cancelDrawing();

                isClicked = false;

                getMapControl().repaint();

            }

        }

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#mouseReleased(java.awt.event.MouseEvent)

     */

    @Override

    public void mouseReleased(MouseEvent e) throws BehaviorException {

        if (m_FirstPoint == null) {

            return;

        }

        m_LastPoint = e.getPoint();

        ViewPort vp = getMapControl().getMapContext().getViewPort();

        Point2D p1 = vp.toMapPoint(m_FirstPoint);

        Point2D p2 = vp.toMapPoint(m_LastPoint);

        Double[] x = new Double[2];

        Double[] y = new Double[2];

        x[0] = p1.getX();

        x[1] = p2.getX();

        y[0] = p1.getY();

        y[1] = p2.getY();

        MeasureEvent event = new MeasureEvent(x, y, e);

        listener.circleFinished(event);

        if (this.isMyButton(e)) {

            m_FirstPoint = null;

            m_LastPoint = null;

            isClicked = false;

        }

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#mouseDragged(java.awt.event.MouseEvent)

     */

    @Override

    public void mouseDragged(MouseEvent e) throws BehaviorException {

        mouseMoved(e);

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#mouseMoved(java.awt.event.MouseEvent)

     */

    @Override

    public void mouseMoved(MouseEvent e) throws BehaviorException {

        if (m_FirstPoint == null) {

            return;

        }

        m_LastPoint = e.getPoint();

        ViewPort vp = getMapControl().getMapContext().getViewPort();

        Point2D p1 = vp.toMapPoint(m_FirstPoint);

        Point2D p2 = vp.toMapPoint(m_LastPoint);

        //        Fijamos el nuevo extent

        Rectangle2D.Double r = new Rectangle2D.Double();

        r.setFrameFromDiagonal(p1, p2);

        Rectangle2D rectPixel = new Rectangle();

        rectPixel.setFrameFromDiagonal(m_FirstPoint, m_LastPoint);

        Double[] x = new Double[2];

        Double[] y = new Double[2];

        x[0] = p1.getX();

        x[1] = p2.getX();

        y[0] = p1.getY();

        y[1] = p2.getY();

        MeasureEvent event = new MeasureEvent(x, y, e);

        listener.circle(event);

        getMapControl().repaint();

    }

    /**

     * <p>

     * Sets a tool listener to work with the <code>MapControl</code> using this

     * behavior.</p>

     *

     * @param listener a <code>CircleListener</code> object for this behavior

     */

    public void setListener(ToolListener listener) {

        this.listener = (AbstractCircleListener) listener;

    }

    /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Behavior.Behavior#getListener()

     */

    @Override

    public ToolListener getListener() {

        return listener;

    }

}