Application: gvSIG desktop

/* 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 es.gva.cit.gvsig.gazetteer.loaders;

import java.awt.Color;

import java.awt.Toolkit;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.fmap.MapContext;

import com.iver.cit.gvsig.fmap.ViewPort;

import com.iver.cit.gvsig.fmap.core.FPoint2D;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.core.ShapeFactory;

import com.iver.cit.gvsig.fmap.core.v02.FConstant;

import com.iver.cit.gvsig.fmap.core.v02.FSymbol;

import com.iver.cit.gvsig.fmap.crs.CRSFactory;

import com.iver.cit.gvsig.fmap.layers.GraphicLayer;

import com.iver.cit.gvsig.fmap.rendering.FGraphicLabel;

import com.iver.cit.gvsig.project.documents.view.gui.View;

import es.gva.cit.gazetteer.querys.Feature;

import es.gva.cit.gazetteer.querys.GazetteerQuery;

import es.gva.cit.gvsig.gazetteer.DeleteSearchesExtension;

/**

 * This class is used to load a new feature like a layer in gvSIG

 * 

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 */

public class FeatureLoader {     

        /**

         * Coordinates Transformer

         */

        private ICoordTrans coordTrans;        

        /**

         * @param projection

         * Server projection

         */

        public FeatureLoader(String sProjection){

                View activeView = 

                        (View) PluginServices.getMDIManager().getActiveWindow();

                IProjection projection = CRSFactory.getCRS(sProjection);

                if (projection == null){

                        projection = activeView.getMapControl().getViewPort().getProjection();

                }

                coordTrans=  projection.getCT(activeView.getMapControl().getViewPort().getProjection());

        }

        /**

         * It makes a zoom in gvSIG

         * @param

         * feature

         * @param

         * query

         * Query that contains advanced options to search and

         * to show the results

         * @return

         * true or false if fail

         */

        public boolean load(Feature feature,GazetteerQuery query) {

                addAndDrawLabel(feature,

                                query.getOptions().getAspect().isKeepOld(),

                                query.getOptions().getAspect().isPaintCurrent());

                if (query.getOptions().getAspect().isGoTo()){

                        focusCenter(feature);

                }        

                return true;

        }    

        /**

         * This method focus the toponim in the center of the view 

         * @param feature

         * Feature that contains the coordinates

         */

        private void focusCenter(Feature feature){

                View activeView = 

                        (View) PluginServices.getMDIManager().getActiveWindow();

                IProjection projection = activeView.getProjection();

                ViewPort viewPort = activeView.getMapControl().getViewPort();

                Point2D point = getReprojectedPoint(feature.getCoordinates());

                Rectangle2D zoomExtent = null;

                if (viewPort.getAdjustedExtent() == null){

                }else{

                        Toolkit kit = Toolkit.getDefaultToolkit();

                        double dpi = kit.getScreenResolution();

                        Rectangle2D extent = projection.getExtent(viewPort.getAdjustedExtent(),

                                        new Double(25000).doubleValue(),

                                        new Double(viewPort.getImageWidth()).doubleValue(),

                                        new Double(viewPort.getImageHeight()).doubleValue(),

                                        MapContext.CHANGE[viewPort.getMapUnits()],

                                        MapContext.CHANGE[viewPort.getDistanceUnits()],

                                        dpi);                                

                        zoomExtent = new Rectangle2D.Double(point.getX() - extent.getWidth()/2,

                                        point.getY() - extent.getHeight()/2,

                                        extent.getWidth(),

                                        extent.getHeight());

                        activeView.getMapControl().getMapContext().zoomToExtent(zoomExtent);

                }

        } 

        /**

         * It adds a new Label to the current view

         * @param feature

         * To obtain the coordinates and the toponim name

         * @param isRemoveOldClicked

         * To remove or keep the old searches

         */

        private void addAndDrawLabel(Feature feature,boolean isRemoveOldClicked,boolean isMarkedPlaceClicked){

                View activeView = 

                        (View) PluginServices.getMDIManager().getActiveWindow();

                GraphicLayer lyr = activeView.getMapControl().getMapContext().getGraphicsLayer();

                if (isRemoveOldClicked){

                        lyr.clearAllGraphics();

                }        

                if (isMarkedPlaceClicked){

                        int idSymbol = lyr.addSymbol(getSymbol());                        

                        IGeometry geom = ShapeFactory.createPoint2D(new FPoint2D(getReprojectedPoint(feature.getCoordinates())));

                        FGraphicLabel theLabel = new FGraphicLabel(geom, idSymbol, feature.getName());

                        lyr.addGraphic(theLabel);

                        DeleteSearchesExtension.setVisible();

                        PluginServices.getMainFrame().enableControls();

                }                        

                activeView.getMapControl().drawGraphics();

                //This line could look stupid, but is necessary because grawGraphics does't

                //remove the old Graphics searched

                activeView.getMapControl().getViewPort().setExtent(activeView.getMapControl().getViewPort().getExtent());

        }

        /**

         * Creates a FSymbol

         * @return

         * FSymbol

         */

        private FSymbol getSymbol(){

                FSymbol theSymbol = new FSymbol(FConstant.SYMBOL_TYPE_TEXT); 

                theSymbol.setColor(Color.RED);

                theSymbol.setStyle(FConstant.SYMBOL_STYLE_MARKER_CIRCLE);

                theSymbol.setFontColor(Color.BLACK);

                theSymbol.setSizeInPixels(true);

                theSymbol.setSize(10);

                return theSymbol;

        }

        /**

         * Reprojects the new point

         * @param ptOrig

         * Origin point

         * @return

         * FPoint2D

         */

        private Point2D getReprojectedPoint(Point2D ptOrigin){

                Point2D ptDest = null;

                return getCoordTrans().convert(ptOrigin, ptDest);

        }

        /**

         * @return the coordTrans

         */

        public ICoordTrans getCoordTrans() {

                return coordTrans;

        }

}