Application: gvSIG desktop

/**

 *

 */

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

import java.awt.Image;

import java.awt.event.InputEvent;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import org.gvsig.andami.PluginServices;

import org.gvsig.app.gui.styling.SymbolSelector;

import org.gvsig.app.project.documents.view.MapOverview;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.exception.CreateEnvelopeException;

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

import org.gvsig.fmap.geom.util.UtilFunctions;

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.EnvelopeEvent;

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

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

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

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * <p>Listener for changes of the zoom caused by selecting a rectangular area on the associated

 *  {@link MapOverview MapOverview} object with the first button of the mouse.</p>

 *

 * <p>If the kind of action was a movement on the associated object,

 *  updates the <i>extent</i> of its rectangular area.</p>

 *

 * <p>If the kind of action is the selection of a rectangular area, and is bigger than 3x3 pixels,

 *  applies a <i>zoom in</i> operation centering its <code>ViewPort</code> according the equivalent <i>extent</i>

 *  in map coordinates.</p>

 *

 * @see ViewPort

 *

 * @author jmvivo

 */

public class MapOverviewChangeZoomListener implements RectangleListener, PanListener {

        private static final GeometryManager geomManager = GeometryLocator.getGeometryManager();

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

        /**

         * The image to display when the cursor is active.

         */

        private final Image izoomin = PluginServices.getIconTheme()

                .get("cursor-zoom-in").getImage();

        /**

         * The cursor used to work with this tool listener.

         *

         * @see #getCursor()

         */

//        private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(izoomin,new Point(16, 16), "");

        /**

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

         */

        protected MapControl mapControl;

        /**

         * <p>Creates a new listener for changes of zoom at the associated {@link MapOverview MapOverview} object.</p>

         *

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

         */

        public MapOverviewChangeZoomListener(MapControl mapControl) {

                this.mapControl=mapControl;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.tools.Listeners.RectangleListener#rectangle(com.iver.cit.gvsig.fmap.tools.Events.RectangleEvent)

         */

        public void rectangle(EnvelopeEvent event) throws BehaviorException {

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

                        return;

                }

                MapOverview mov=(MapOverview) this.mapControl;

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

                ViewPort vp = mov.getViewPort();

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

                        // Recuperamos las coordenadas del evento en px

                        Rectangle2D pxRectangle = event.getPixelCoordRect();

                        // Recuperamos las coordenadas del evento en coordenadas de la vista de localizador

                        Envelope realRectangle = event.getWorldCoordRect();

                        if ((pxRectangle.getWidth() < 3) && (pxRectangle.getHeight() < 3))

                        {

                                // rectangulo < 3 px no hacemos nada

                                return;

                        } else {

                                // Cambiamos la extension de la vista asociada al localizador

                                vpView.setEnvelope(realRectangle);

                                mov.getAssociatedMapContext().invalidate();

                                vpView.setEnvelope(realRectangle);

                        }

                }

        }

        /*

         * (non-Javadoc)

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

         */

        public Image getImageCursor() {

                return izoomin;

        }

        /* (non-Javadoc)

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

         */

        public boolean cancelDrawing() {

                return true; //???

        }

        /*

         * (non-Javadoc)

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

         */

        public void move(MoveEvent event) throws BehaviorException {

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

                        return;

                }

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

                MapOverview mov=(MapOverview) this.mapControl;

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

                ViewPort vp = mov.getViewPort();

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

                        // Creamos un recuadro con las coordenadas del raton

                        // traducidas a la del mapa

//                        Rectangle2D realRectangle = new Rectangle2D.Double();

                        Point2D p1=vp.toMapPoint(event.getFrom());

                        Point2D p2=vp.toMapPoint(event.getTo());

                        Envelope realRectangle = null;

                        double x=0;

                        double y=0;

                        double xMax=0;

                        double yMax=0;

                        if (p1.getX()<p2.getX()){

                                x=p1.getX();

                                xMax=p2.getX();

                        }else{

                                x=p2.getX();

                                xMax=p1.getX();

                        }

                        if (p1.getY()<p2.getY()){

                                y=p1.getY();

                                yMax=p2.getY();

                        }else{

                                y=p2.getY();

                                yMax=p1.getY();

                        }

                                try {

                                        realRectangle = geomManager.createEnvelope(x,y,xMax,yMax, SUBTYPES.GEOM2D);

                                } catch (CreateEnvelopeException e) {

                                        logger.error("Error creating the envelope", e);

                                }

                        //                        realRectangle.setFrameFromDiagonal(vp.toMapPoint(event.getFrom()),vp.toMapPoint(event.getTo()));

                        // Establecemos la forma

                        mov.refreshOverView(realRectangle);

                }

        }

        /**

         * Determines if has pressed the button 1 of the mouse.

         */

        private boolean checkModifiers(MouseEvent event) {

                int modifiers = event.getModifiers();

                int keyPressedMask = InputEvent.BUTTON1_MASK;

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

        }

}