| gvSIG desktop 1

/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib��ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.project.documents.view.toolListeners;

import java.awt.Image;

import java.awt.event.InputEvent;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

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

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

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontrol.MapControl;

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

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

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

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.project.documents.view.MapOverview;

/**

 * <p>Listener for moving the extent of the associated {@link MapOverview MapOverview} object

 *  according the movement between the initial and final points of line determined by the movement

 *  dragging with the third button of the mouse.</p>

 *

 * <p>Updates the extent of its <code>ViewPort</code> with the new position.</p>

 *

 * @author Vicente Caballero Navarro

 */

public class MapOverviewPanListener implements PanListener {

        /**

         * The image to display when the cursor is active.

         */

        private final Image icursor = PluginServices

                .getIconTheme().get("crux-cursor").getImage();

        /**

         * The cursor used to work with this tool listener.

         *

         * @see #getCursor()

         */

//        private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(icursor,

//                        new Point(16, 16), "");

        /**

         * Reference to the <code>MapControl</code> object that uses.

         */

        protected MapControl mapControl;

        /**

          * <p>Creates a new listener for changing the position of the extent of the associated {@link MapOverview MapOverview} object.</p>

         *

         * @param mapControl the <code>MapControl</code> object which represents the <code>MapOverview</code>

         */

        public MapOverviewPanListener(MapControl mapControl) {

                this.mapControl = mapControl;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getImageCursor()

         */

        public Image getImageCursor() {

                return icursor;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing()

         */

        public boolean cancelDrawing() {

                return true;

        }

        /*

        public void move(MoveEvent event) throws BehaviorException {

                if (!checkModifiers(event.getEvent().getModifiers())){

                        return;

                }

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

                MapOverview mov=(MapOverview) this.mapControl;

                ViewPort vpView=mov.getAssociatedMapContext().getViewPort();

                if (vp.getExtent() != null) {

                        Point2D p = vp.toMapPoint(event.getTo());

                        Rectangle2D r = (Rectangle2D) vpView.getExtent().clone();

                        r.setRect(p.getX() - (r.getWidth() / 2),

                                p.getY() - (r.getHeight() / 2), r.getWidth(), r.getHeight());

                        //vpView.setExtent(r);

                        double scale;

                        double escalaX;

                        double escalaY;

                        double newHeight;

                        double newWidth;

                        double xCenter = r.getCenterX();

                        double yCenter = r.getCenterY();

                        escalaX = mapControl.getWidth() / r.getWidth();

                        escalaY = mapControl.getHeight() / r.getHeight();

                        Rectangle2D adjustedExtent = new Rectangle2D.Double();

                        if (escalaX < escalaY) {

                                scale = escalaX;

                                newHeight = mapControl.getHeight() / scale;

                                adjustedExtent.setRect(xCenter - (r.getWidth() / 2.0),

                                        yCenter - (newHeight / 2.0), r.getWidth(), newHeight);

                        } else {

                                scale = escalaY;

                                newWidth = mapControl.getWidth() / scale;

                                adjustedExtent.setRect(xCenter - (newWidth / 2.0),

                                        yCenter - (r.getHeight() / 2.0), newWidth,

                                        r.getHeight());

                        }

                        mov.refreshOverView(adjustedExtent);

                }

        }

        */

        /*

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.PanListener#move(MoveEvent)

         */

        public void move(MoveEvent event) throws BehaviorException {

                if (!checkModifiers(event.getEvent())){

                        return;

                }

                System.out.println("mapOvervierPan");

                MapOverview mov=(MapOverview) this.mapControl;

                ViewPort vp = mov.getViewPort();

                ViewPort vpView=mov.getAssociatedMapContext().getViewPort();

                if (vp.getExtent() != null && vpView.getExtent() != null) {

                        // recogemos la forma de la vista actual

                        Envelope curEnvelope = vpView.getAdjustedExtent();

                        // traducimos las coordenadas en px de la ultima posicion del raton

                        // a coordenadas de la vista

                        Point2D thePoint= vp.toMapPoint( event.getTo());

                        double diffx =

                                (curEnvelope.getMaximum(0) - curEnvelope.getMinimum(0)) / 2;

                        double diffy =

                                (curEnvelope.getMaximum(1) - curEnvelope.getMinimum(1)) / 2;

                        // Creamos un envelope del mismo tama�o

                        // con la coordenadas del punto del raton,

                        // teniendo en cuenta que estas sera el

                        // centro del recuadro

                        Envelope envelope = new DefaultEnvelope(

                                        thePoint.getX() - diffx,

                                        thePoint.getY() - diffy,

                                        thePoint.getX() + diffx,

                                        thePoint.getY()        + diffy

                        );

                        // cambiamos la posicion

                        mov.refreshOverView(envelope);

                        vpView.setEnvelope(envelope);

                        mov.getAssociatedMapContext().invalidate();

                }

        }

        /**

         * Determines if has pressed the button 3 of the mouse.

         */

        private boolean checkModifiers(MouseEvent event) {

                int modifiers = event.getModifiers();

                /*

                int keyPressedMask = InputEvent.BUTTON2_MASK;

                *** No se porque el boton derecho del raton devuelve

                *** un modificador 'Meta + BUTTON3'. Pensaba que deberia

                *** devolver 'BUTTON2' ????

                */

                int keyPressedMask = InputEvent.BUTTON3_MASK;

                return ((modifiers & keyPressedMask) == keyPressedMask);

        }

}