com.google.gwt.maps.sample.hellomaps.client.EarthPluginDemo.java Source code

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Here is the source code for com.google.gwt.maps.sample.hellomaps.client.EarthPluginDemo.java

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/*
 * 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.JavaScriptObject;
import com.google.gwt.maps.client.MapType;
import com.google.gwt.maps.client.MapWidget;
import com.google.gwt.maps.client.control.SmallMapControl;
import com.google.gwt.maps.client.event.EarthInstanceHandler;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Panel;

/**
 * Demo the Google Earth Plugin.
 */
public class EarthPluginDemo extends MapsDemo {

    private static HTML descHTML = null;

    private static final String descString = "<p>"
            + "Creates a 500 x 500 pixel map viewport centered on the Googleplex in Mountain View, CA USA. "
            + "Attempts to invoke the Google Earth plugin (not available on all browsers.)</p>";

    public static MapsDemoInfo init() {
        return new MapsDemoInfo() {
            @Override
            public MapsDemo createInstance() {
                return new EarthPluginDemo();
            }

            @Override
            public HTML getDescriptionHTML() {
                if (descHTML == null) {
                    descHTML = new HTML(descString);
                }
                return descHTML;
            }

            @Override
            public String getName() {
                return "Earth Plugin";
            }
        };
    }

    private MapWidget map;

    public EarthPluginDemo() {
        Panel panel = new FlowPanel();
        map = new MapWidget(LatLng.newInstance(37.42317, -122.08364), 16);
        map.setSize("500px", "500px");
        map.addControl(new SmallMapControl());
        map.addMapType(MapType.getEarthMap());
        map.setCurrentMapType(MapType.getEarthMap());
        panel.add(map);
        initWidget(panel);
        map.getEarthInstance(new EarthInstanceHandler() {

            public void onEarthInstance(EarthInstanceEvent event) {
                final JavaScriptObject earth = event.getEarthInstance();
                if (earth == null) {
                    Window.alert("Failed to init earth plugin");
                } else {
                    /*
                     * Create a marker. The timer is set to give the earth plugin a chance
                     * to position to the proper point on the map.
                     */
                    new Timer() {

                        @Override
                        public void run() {
                            createPlacemark(earth);
                        }
                    }.schedule(1000);
                }
            }
        });
    }

    /**
     * Part of a sample ripped out of the Google Earth documentation. See {@link
     * "http://code.google.com/apis/earth/documentation/introduction.html"}.
     * 
     * @param ge The Google Earth Instance
     */
    private native void createPlacemark(JavaScriptObject ge) /*-{
                                                             var placemark = ge.createPlacemark('');
                                                             placemark.setName("You are at Google");
                                                             ge.getFeatures().appendChild(placemark);
                                                                 
                                                             // Create style map for placemark
                                                             var normal = ge.createIcon('');
                                                             normal.setHref('http://maps.google.com/mapfiles/kml/paddle/red-circle.png');
                                                             var iconNormal = ge.createStyle('');
                                                             iconNormal.getIconStyle().setIcon(normal);
                                                             var highlight = ge.createIcon('');
                                                             highlight.setHref('http://maps.google.com/mapfiles/kml/paddle/red-circle.png');
                                                             var iconHighlight = ge.createStyle('');
                                                             iconHighlight.getIconStyle().setIcon(highlight);
                                                             var styleMap = ge.createStyleMap('');
                                                             styleMap.setNormalStyle(iconNormal);
                                                             styleMap.setHighlightStyle(iconHighlight);
                                                             placemark.setStyleSelector(styleMap);
                                                                 
                                                             // Create point     
                                                             var la = ge.getView().copyAsLookAt(ge.ALTITUDE_RELATIVE_TO_GROUND);
                                                             var point = ge.createPoint('');
                                                             point.setLatitude(la.getLatitude());
                                                             point.setLongitude(la.getLongitude());
                                                             placemark.setGeometry(point);
                                                             }-*/;
}