Java tutorial
/* * Copyright 2008 Google Inc. * * 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 com.google.gwt.maps.sample.hellomaps.client; import com.google.gwt.core.client.GWT; import com.google.gwt.maps.client.MapWidget; import com.google.gwt.maps.client.control.LargeMapControl; import com.google.gwt.maps.client.geocode.DirectionQueryOptions; import com.google.gwt.maps.client.geocode.DirectionResults; import com.google.gwt.maps.client.geocode.Directions; import com.google.gwt.maps.client.geocode.DirectionsCallback; import com.google.gwt.maps.client.geocode.DirectionsPanel; import com.google.gwt.maps.client.geocode.Placemark; import com.google.gwt.maps.client.geocode.Route; import com.google.gwt.maps.client.geocode.StatusCodes; import com.google.gwt.maps.client.geocode.Waypoint; import com.google.gwt.maps.client.geom.LatLng; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.HasVerticalAlignment; import java.util.List; /** * This demo extends the simple demo, by adding waypoints to the requested * directions. * * For full documentation of the various objects, methods and events in the * Directions API package, consult the API Reference at * {@link "http://code.google.com/apis/maps"} */ public class RoutedDirectionsDemo extends MapsDemo { private static final LatLng ATLANTA = LatLng.newInstance(33.7814790, -84.3880580); // Points of interest along the map. private static final LatLng STONE_MOUNTAIN_PARK = LatLng.newInstance(33.80653802509606, -84.15252685546875); // Cyclorama private static final LatLng CYCLORAMA = LatLng.newInstance(33.741185330333956, -84.35834884643555); // Georgia Aquarium private static final LatLng GEORGIA_AQUARIUM = LatLng.newInstance(33.761443931868925, -84.39432263374329); // Underground Atlanta private static final LatLng UNDERGROUND_ATLANTA = LatLng.newInstance(33.75134645137294, -84.39026713371277); // The Dwarf House Restaurant in Hapeville private static final String DWARF_HOUSE = "461 N Central Ave Hapeville, GA"; private static HTML descHTML = null; private static final String descString = "<p>Displays a map centered on" + " Atlanta, GA USA</p>" + " <p>Queries the Google Directions service and displays a polyline," + " markers on the map, and textual directions on the right. The" + " directions are for a leisurely route from Midtown Atlanta to the" + " Atlanta Airport through various waypoints.</p>\n"; private static Waypoint waypoints[] = { new Waypoint("10 10th St NE, Atlanta, GA 30309"), // Midtown Atlanta new Waypoint(GEORGIA_AQUARIUM), // new Waypoint(UNDERGROUND_ATLANTA), // new Waypoint(CYCLORAMA), // new Waypoint(STONE_MOUNTAIN_PARK), // new Waypoint(DWARF_HOUSE), // new Waypoint("N Terminal Pkwy, Atlanta, GA 30320") // The Airport }; public static MapsDemoInfo init() { return new MapsDemoInfo() { @Override public MapsDemo createInstance() { return new RoutedDirectionsDemo(); } @Override public HTML getDescriptionHTML() { if (descHTML == null) { descHTML = new HTML(descString); } return descHTML; } @Override public String getName() { return "Routed Directions"; } }; } private MapWidget map; public RoutedDirectionsDemo() { final Grid grid = new Grid(1, 2); grid.setWidth("100%"); grid.getCellFormatter().setWidth(0, 0, "64%"); grid.getCellFormatter().setVerticalAlignment(0, 0, HasVerticalAlignment.ALIGN_TOP); grid.getCellFormatter().setWidth(0, 1, "34%"); grid.getCellFormatter().setVerticalAlignment(0, 1, HasVerticalAlignment.ALIGN_TOP); map = new MapWidget(ATLANTA, 15); map.setHeight("480px"); map.addControl(new LargeMapControl()); grid.setWidget(0, 0, map); DirectionsPanel directionsPanel = new DirectionsPanel(); grid.setWidget(0, 1, directionsPanel); directionsPanel.setSize("100%", "100%"); initWidget(grid); DirectionQueryOptions opts = new DirectionQueryOptions(map, directionsPanel); // Create directions from Midtown Atlanta to the Airport with a *few* // stops along the way. Directions.loadFromWaypoints(waypoints, opts, new DirectionsCallback() { public void onFailure(int statusCode) { Window.alert( "Failed to load directions: Status " + StatusCodes.getName(statusCode) + " " + statusCode); } public void onSuccess(DirectionResults result) { GWT.log("Successfully loaded directions.", null); // A little exercise of the route API List<Route> routes = result.getRoutes(); for (Route r : routes) { Placemark start = r.getStartGeocode(); GWT.log("start of route: " + start.getAddress(), null); Placemark end = r.getEndGeocode(); GWT.log("end of route: " + end.getAddress(), null); } } }); } }