org.onebusaway.webapp.gwt.agencies_map.AgenciesMap.java Source code

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Here is the source code for org.onebusaway.webapp.gwt.agencies_map.AgenciesMap.java

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/**
 * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.onebusaway.webapp.gwt.agencies_map;

import java.util.List;

import org.onebusaway.transit_data.model.AgencyBean;
import org.onebusaway.transit_data.model.AgencyWithCoverageBean;
import org.onebusaway.webapp.gwt.common.widgets.DivPanel;
import org.onebusaway.webapp.gwt.where_library.rpc.WebappServiceAsync;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.StyleInjector;
import com.google.gwt.maps.client.InfoWindow;
import com.google.gwt.maps.client.InfoWindowContent;
import com.google.gwt.maps.client.MapWidget;
import com.google.gwt.maps.client.control.MapTypeControl;
import com.google.gwt.maps.client.control.ScaleControl;
import com.google.gwt.maps.client.control.SmallMapControl;
import com.google.gwt.maps.client.event.MarkerClickHandler;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.maps.client.geom.LatLngBounds;
import com.google.gwt.maps.client.overlay.Marker;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.RootPanel;

public class AgenciesMap implements EntryPoint {

    private static AgencyMapResources _resources = GWT.create(AgencyMapResources.class);

    private static AgencyMapCssResource _css = _resources.getCss();

    @Override
    public void onModuleLoad() {

        RootPanel panel = RootPanel.get("agencies_map");
        if (panel == null) {
            System.out.println("you didn't include a div with the id of \"agencies_map\"");
            return;
        }

        MapWidget map = new MapWidget();
        map.addControl(new SmallMapControl());
        map.addControl(new MapTypeControl());
        map.addControl(new ScaleControl());
        map.setScrollWheelZoomEnabled(true);
        panel.add(map);

        StyleInjector.inject(_css.getText());

        WebappServiceAsync service = WebappServiceAsync.SERVICE;
        service.getAgencies(new AgencyHandler(map));
    }

    private static class AgencyHandler implements AsyncCallback<List<AgencyWithCoverageBean>> {

        private MapWidget _map;

        public AgencyHandler(MapWidget map) {
            _map = map;
        }

        @Override
        public void onSuccess(List<AgencyWithCoverageBean> agencies) {

            LatLngBounds bounds = LatLngBounds.newInstance();
            for (AgencyWithCoverageBean agencyWithCoverage : agencies) {

                final AgencyBean agency = agencyWithCoverage.getAgency();
                final LatLng point = LatLng.newInstance(agencyWithCoverage.getLat(), agencyWithCoverage.getLon());
                bounds.extend(point);

                Marker marker = new Marker(point);
                marker.addMarkerClickHandler(new MarkerClickHandler() {
                    @Override
                    public void onClick(MarkerClickEvent event) {
                        InfoWindow window = _map.getInfoWindow();
                        DivPanel panel = new DivPanel();

                        DivPanel rowA = new DivPanel(_css.paragraph());
                        panel.add(rowA);
                        rowA.add(new Anchor(agency.getName(), agency.getUrl()));

                        DivPanel rowB = new DivPanel(_css.paragraph());
                        panel.add(rowB);
                        rowB.add(new Anchor("jump to map", "index.html#m(location)lat(" + point.getLatitude()
                                + ")lon(" + point.getLongitude() + ")accuracy(4)"));
                        window.open(point, new InfoWindowContent(panel));
                    }
                });

                _map.addOverlay(marker);
            }

            if (!bounds.isEmpty())
                _map.setCenter(bounds.getCenter(), _map.getBoundsZoomLevel(bounds) - 1);
        }

        @Override
        public void onFailure(Throwable arg0) {
            // TODO Auto-generated method stub

        }
    }
}