Application: gvSIG desktop » gvSIG raster

/* 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.raster.tools.app.basic.tool.rasterresolution;

import java.awt.Cursor;

import java.awt.Image;

import java.awt.Point;

import java.awt.Toolkit;

import java.awt.geom.Point2D;

import java.util.ArrayList;

import org.gvsig.andami.IconThemeHelper;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.fmap.dal.exception.ReadException;

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.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontrol.MapControl;

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

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

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

import org.gvsig.raster.fmap.layers.FLyrRaster;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Listener para la tool de zoom a la resoluci?n del raster. Este es el encargado de recibir

 * la petici?n desde la vista y calcular las coordenadas del raster.

 *

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class ZoomPixelCursorListener implements PointListener {

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

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

        private Image                                                 img                         = null;

        private Cursor                                                         cur                         = null;

        private MapControl                                                 mapCtrl;

        /**

         * Constructor. Asigna el MapControl

         * @param mc

         */

        public ZoomPixelCursorListener(MapControl mc) {

                this.mapCtrl = mc;

        }

        /**

         * Evento de selecci?n de punto sobre la vista. Aquin se calcular?n las coordenadas

         * y dimensiones de la petici?n centrando la petici?n en el punto pinchado en la vista.

         */

        @SuppressWarnings("deprecation")

        public void point(PointEvent event) throws BehaviorException {

                Point2D pReal = mapCtrl.getMapContext().getViewPort().toMapPoint(event.getPoint());

                //Point imagePoint = new Point((int) event.getPoint().getX(), (int) event.getPoint().getY());

                ViewPort v = mapCtrl.getMapContext().getViewPort();

                FLayer[] actives = mapCtrl.getMapContext().getLayers().getActives();

                Envelope ext = null;

                try {

                        ext = actives[0].getFullEnvelope();

                } catch (ReadException e1) {

                        NotificationManager.addError("Error al obtener el extent", e1);

                }

                ArrayList<Object> attr = ((FLyrRaster)actives[0]).getAttributes();

                int width = 0, height = 0;

                for (int i=0; i<attr.size(); i++) {

                        Object[] a = (Object []) attr.get(i);

                        if (a[0].toString().equals("Width"))

                                width = ((Integer)a[1]).intValue();

                        if (a[0].toString().equals("Height"))

                                height = ((Integer)a[1]).intValue();

                }

                if(        ext != null &&

                                width != 0 &&

                                height != 0){

                        double wcOriginCenterX = pReal.getX();

                        double wcOriginCenterY = pReal.getY();

                        //Hallamos la relaci?n entre el pixel y las WC a partir de la imagen de la capa

                        double relacionPixelWcWidth =  (ext.getMaximum(0) - ext.getMinimum(0))/width;

                        double relacionPixelWcHeight = (ext.getMaximum(1) - ext.getMinimum(1))/height;

                        //double desplazamientoX = ext.getMinX();

                        //double desplazamientoY = ext.getMinY();

                        double wcOriginX = wcOriginCenterX - ((v.getImageWidth()*relacionPixelWcWidth)/2);

                        double wcOriginY = wcOriginCenterY - ((v.getImageHeight()*relacionPixelWcHeight)/2);

                        double wcDstMinX = wcOriginX;

                        double wcDstMinY = wcOriginY;

                        double wcDstMaxX = wcDstMinX + (v.getImageWidth()*relacionPixelWcWidth);

                        double wcDstMaxY = wcDstMinY + (v.getImageHeight()*relacionPixelWcHeight);

                        double wcDstWidth = wcDstMaxX - wcDstMinX;

                        double wcDstHeight = wcDstMaxY - wcDstMinY;

                        try {

                                ext = geomManager.createEnvelope(wcDstMinX, wcDstMinY, wcDstMinX

                                                + wcDstWidth, wcDstMinY + wcDstHeight, SUBTYPES.GEOM2D);

                        } catch (CreateEnvelopeException e) {

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

                        }

                        mapCtrl.getMapContext().getViewPort().setEnvelope(ext);

                }

        }

        /**

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

         */

        public Cursor getCursor() {

                if(cur == null)

                        cur = Toolkit.getDefaultToolkit().createCustomCursor(getImageCursor(), new Point(16, 16), "");

                return cur;

        }

        /**

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

         */

        public boolean cancelDrawing() {

                return false;

        }

        public void pointDoubleClick(PointEvent event) throws BehaviorException {

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.mapcontrol.tools.Listeners.ToolListener#getImageCursor()

         */

        public Image getImageCursor() {

                if(img == null)

                        img = IconThemeHelper.getImage("zoom-pixel-cursor");

                return img;

        }

}