GPGeocodingEventHandler.java

/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   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 3 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, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.client.widget.map;

import org.geosdi.geoplatform.gui.client.widget.map.event.geocoding.GeocodingEventHandler;
import org.geosdi.geoplatform.gui.client.widget.map.feature.GeocodingVectorFeature;
import org.geosdi.geoplatform.gui.client.widget.map.marker.advanced.GeocodingVectorMarker;
import org.geosdi.geoplatform.gui.configuration.map.client.GPCoordinateReferenceSystem;
import org.geosdi.geoplatform.gui.impl.map.GeoPlatformMap;
import org.geosdi.geoplatform.gui.model.IGeoPlatformLocation;
import org.geosdi.geoplatform.gui.puregwt.GPToolbarActionHandlerManager;
import org.geosdi.geoplatform.gui.puregwt.event.UpdateModelAndButtonEvent;
import org.geosdi.geoplatform.gui.puregwt.geocoding.GPGeocodingHandlerManager;
import org.gwtopenmaps.openlayers.client.LonLat;
import org.gwtopenmaps.openlayers.client.Projection;
import org.gwtopenmaps.openlayers.client.feature.VectorFeature;
import org.gwtopenmaps.openlayers.client.geometry.Geometry;
import org.gwtopenmaps.openlayers.client.geometry.MultiPolygon;

/**
 *
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
public class GPGeocodingEventHandler implements GeocodingEventHandler {

    private final GeoPlatformMap mapWidget;
    private VectorFeature vectorFeature;
    private boolean activated;
    /**
     * TODO : Think a way to have this in configuration *
     */
    private final GeocodingVectorMarker geocoderMarker;
    private final GeocodingVectorFeature geocoderFeature = new GeocodingVectorFeature();

    public GPGeocodingEventHandler(GeoPlatformMap theMapWidget) {
        this.mapWidget = theMapWidget;
        this.geocoderMarker = new GeocodingVectorMarker(this.mapWidget.getMap(),
                "GPGeocoding-Marker-Vector-Layer");
        GPGeocodingHandlerManager.addHandler(GeocodingEventHandler.TYPE, this);
    }

    @Override
    public void register() {
        if (!activated) {
            this.mapWidget.getMap().addLayer(geocoderMarker.getMarkerLayer());
            this.mapWidget.getMap().addLayer(geocoderFeature.geFeatureLayer());
            this.activated = true;
        }
        this.geocoderMarker.addControl();
    }

    @Override
    public void unregister() {
        this.geocoderMarker.removeControl();
        this.geocoderMarker.removeMarker();
        this.geocoderFeature.removeFeature();
//        this.mapWidget.getMap().removeLayer(this.geocoderMarker.getMarkerLayer());
//        this.mapWidget.getMap().removeLayer(
//                this.geocoderFeature.geFeatureLayer());
    }

    @Override
    public void onRegisterGeocodingLocation(IGeoPlatformLocation bean,
            GPCoordinateReferenceSystem crs, Object provider,
            boolean isSetCenter) {
        LonLat center = new LonLat(bean.getLon(), bean.getLat());

        if (this.mapWidget.getMap().getProjection().equals(
                GPCoordinateReferenceSystem.GOOGLE_MERCATOR.getCode())) {
            center.transform(crs.getCode(),
                    GPCoordinateReferenceSystem.EPSG_GOOGLE.getCode());
        }

        this.geocoderMarker.setProvider(provider);
        this.geocoderMarker.addMarker(center, isSetCenter);
        GPToolbarActionHandlerManager.fireEvent(new UpdateModelAndButtonEvent(
                bean));
    }

    @Override
    public void onRegisterGeocodingFeature(IGeoPlatformLocation bean,
            GPCoordinateReferenceSystem crs, Object provider) {

        this.geocoderMarker.removeMarker();

        this.mapWidget.getMap().addLayer(this.geocoderFeature.geFeatureLayer());
        MultiPolygon geom = MultiPolygon.narrowToMultiPolygon(Geometry.fromWKT(
                bean.getWkt()).getJSObject());

        if (this.mapWidget.getMap().getProjection().equals(
                GPCoordinateReferenceSystem.GOOGLE_MERCATOR.getCode())) {
            geom.transform(new Projection(crs.getCode()), new Projection(
                    GPCoordinateReferenceSystem.EPSG_GOOGLE.getCode()));
        }

        this.geocoderFeature.setProvider(provider);

        vectorFeature = new VectorFeature(geom);
        vectorFeature.setFeatureId("geocoding-" + bean.getCity());
        this.geocoderFeature.addFeature(vectorFeature, this.mapWidget.getMap());
    }

    @Override
    public void removeMarker() {
        this.geocoderFeature.removeFeature();
        this.geocoderMarker.removeMarker();
    }

    @Override
    public void activateComponent(boolean flag) {
        if (flag) {
            register();
        } else {
            unregister();
        }
    }

}