| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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 2

 * 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.

 * 

 */

package org.gvsig.fmap.mapcontrol.tools.Behavior;

import java.awt.Color;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import org.gvsig.fmap.mapcontrol.MapControlDrawer;

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

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

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

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

/**

 * <p>

 * Behavior that permits user to move the image of the associated

 * <code>MapControl</code> using a {@link PanListener PanListener}.

 * </p>

 * 

 * @author Vicente Caballero Navarro

 * @author Pablo Piqueras Bartolom?

 */

public class MoveBehavior extends Behavior {

    /**

     * First point of the path in image coordinates.

     */

    private Point2D m_FirstPoint;

    /**

     * Last point of the path in image coordinates.

     */

    private Point2D m_LastPoint;

    /**

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

     * 

     * @see #getListener()

     * @see #setListener(ToolListener)

     */

    private PanListener listener;

    private boolean isButton1;

    /**

     * <p>

     * Creates a new behavior for moving the mouse.

     * </p>

     * 

     * @param pli

     *            listener used to permit this object to work with the

     *            associated <code>MapControl</code>

     */

    public MoveBehavior(PanListener pli) {

        listener = pli;

    }

    public void paintComponent(MapControlDrawer renderer) {

        Color theBackColor =

            getMapControl().getMapContext().getViewPort().getBackColor();

        if (theBackColor == null) {

            renderer.setColor(Color.WHITE);

        } else {

            renderer.setColor(theBackColor);

        }

        renderer.fillRect(0, 0, getMapControl().getWidth(), getMapControl()

            .getHeight());

        if (getMapControl().getImage() != null) {

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

                renderer.drawImage(getMapControl().getImage(),

                    (int) (m_LastPoint.getX() - m_FirstPoint.getX()),

                    (int) (m_LastPoint.getY() - m_FirstPoint.getY()));

            } else {

                super.paintComponent(renderer);

            }

        }

    }

    public void mousePressed(MouseEvent e) {

        if (e.getButton() == MouseEvent.BUTTON1) {

            isButton1 = true;

            m_FirstPoint = e.getPoint();

        } else {

            isButton1 = false;

        }

        if (listener.cancelDrawing()) {

            getMapControl().cancelDrawing();

        }

    }

    public void mouseReleased(MouseEvent e) throws BehaviorException {

        if (e.getButton() == MouseEvent.BUTTON1 && m_FirstPoint != null) {

            MoveEvent event = new MoveEvent(m_FirstPoint, e.getPoint(), e);

            listener.move(event);

            // System.out.println("mouseReleased");

            getMapControl().drawMap(true);

        }

        m_FirstPoint = null;

    }

    public void mouseDragged(MouseEvent e) {

        if (isButton1) {

            m_LastPoint = e.getPoint();

            getMapControl().repaint();

        }

    }

    /**

     * <p>

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

     * behavior.

     * </p>

     * 

     * @param listener

     *            a <code>PanListener</code> object for this behavior

     */

    public void setListener(ToolListener listener) {

        this.listener = (PanListener) listener;

    }

    public ToolListener getListener() {

        return listener;

    }

}