org.onebusaway.webapp.gwt.position_map.IndexPage.java Source code

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Here is the source code for org.onebusaway.webapp.gwt.position_map.IndexPage.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.position_map;

import org.onebusaway.geospatial.model.CoordinateBounds;
import org.onebusaway.geospatial.model.CoordinatePoint;
import org.onebusaway.transit_data.model.ListBean;
import org.onebusaway.transit_data.model.RouteBean;
import org.onebusaway.transit_data.model.trips.TripBean;
import org.onebusaway.transit_data.model.trips.TripDetailsBean;
import org.onebusaway.transit_data.model.trips.TripStatusBean;
import org.onebusaway.transit_data.model.trips.TripsForBoundsQueryBean;
import org.onebusaway.webapp.gwt.common.MapOverlayManager;
import org.onebusaway.webapp.gwt.common.PageException;
import org.onebusaway.webapp.gwt.common.context.Context;
import org.onebusaway.webapp.gwt.common.context.ContextManager;
import org.onebusaway.webapp.gwt.common.widgets.DivWidget;
import org.onebusaway.webapp.gwt.where_library.pages.WhereCommonPage;
import org.onebusaway.webapp.gwt.where_library.rpc.WebappServiceAsync;

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.LargeMapControl;
import com.google.gwt.maps.client.control.MapTypeControl;
import com.google.gwt.maps.client.control.ScaleControl;
import com.google.gwt.maps.client.event.MapMoveEndHandler;
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.FlowPanel;
import com.google.gwt.user.client.ui.Widget;

public class IndexPage extends WhereCommonPage {

    private static PositionMapCssResource _css = PositionMapResources.INSTANCE.getCSS();

    private static LatLng _center = LatLng.newInstance(47.601533, -122.32933);

    private static int _zoom = 11;

    private MapWidget _map;

    private MapOverlayManager _overlayManager;

    private TripPositionHandler _handler = new TripPositionHandler();

    public IndexPage(ContextManager contextManager) {

    }

    public Widget create(final Context context) throws PageException {
        _map = new MapWidget(_center, _zoom);
        _map.addStyleName(_css.map());
        _map.addControl(new LargeMapControl());
        _map.addControl(new MapTypeControl());
        _map.addControl(new ScaleControl());
        _map.setScrollWheelZoomEnabled(true);
        _map.addMapMoveEndHandler(new OurMapMoveHandler());

        _overlayManager = new MapOverlayManager(_map);

        return _map;
    }

    @Override
    public Widget update(Context context) throws PageException {
        return null;
    }

    private void refreshView() {
        _overlayManager.clear();
        if (_map.getZoomLevel() < 16)
            return;
        LatLngBounds llBounds = _map.getBounds();
        LatLng a = llBounds.getNorthEast();
        LatLng b = llBounds.getSouthWest();
        CoordinateBounds bounds = new CoordinateBounds(a.getLatitude(), a.getLongitude(), b.getLatitude(),
                b.getLongitude());

        TripsForBoundsQueryBean query = new TripsForBoundsQueryBean();
        query.setBounds(bounds);
        query.setTime(System.currentTimeMillis());
        query.getInclusion().setIncludeTripBean(true);

        WebappServiceAsync service = WebappServiceAsync.SERVICE;
        service.getTripsForBounds(query, _handler);
    }

    private class OurMapMoveHandler implements MapMoveEndHandler {

        @Override
        public void onMoveEnd(MapMoveEndEvent event) {
            refreshView();
        }
    }

    private class TripPositionHandler implements AsyncCallback<ListBean<TripDetailsBean>> {

        @Override
        public void onSuccess(ListBean<TripDetailsBean> result) {

            for (final TripDetailsBean bean : result.getList()) {
                TripStatusBean status = bean.getStatus();
                CoordinatePoint position = status.getLocation();
                final LatLng point = LatLng.newInstance(position.getLat(), position.getLon());
                Marker marker = new Marker(point);

                _overlayManager.addOverlay(marker);

                marker.addMarkerClickHandler(new MarkerClickHandler() {
                    @Override
                    public void onClick(MarkerClickEvent event) {
                        FlowPanel panel = new FlowPanel();

                        TripBean trip = bean.getTrip();
                        RouteBean route = trip.getRoute();

                        panel.add(new DivWidget("Route: " + route.getShortName()));
                        panel.add(new DivWidget("Trip: " + trip.getId()));
                        panel.add(new DivWidget("Destination: " + bean.getTrip().getTripHeadsign()));

                        InfoWindow window = _map.getInfoWindow();
                        window.open(point, new InfoWindowContent(panel));
                    }
                });

            }
        }

        @Override
        public void onFailure(Throwable caught) {

        }
    }

}