com.google.maps.gwt.samples.overlays.client.MarkerAnimationsIteration.java Source code

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Here is the source code for com.google.maps.gwt.samples.overlays.client.MarkerAnimationsIteration.java

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/*
 * Copyright 2011 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.maps.gwt.samples.overlays.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.dom.client.Document;
import com.google.gwt.user.client.Timer;
import com.google.maps.gwt.client.Animation;
import com.google.maps.gwt.client.GoogleMap;
import com.google.maps.gwt.client.LatLng;
import com.google.maps.gwt.client.MapOptions;
import com.google.maps.gwt.client.MapTypeId;
import com.google.maps.gwt.client.Marker;
import com.google.maps.gwt.client.MarkerOptions;

import java.util.ArrayList;
import java.util.List;

/**
 * Java/GWT-binding version of sample at
 * http://code.google.com/apis/maps/documentation/javascript/examples/marker-animations-iteration.html
 *
 * @author dcarlson@google.com (David Carlson)
 */
public class MarkerAnimationsIteration implements EntryPoint {

    private static final LatLng BERLIN = LatLng.create(52.520816, 13.410186);

    private static final LatLng[] NEIGHBORHOODS = new LatLng[] { LatLng.create(52.511467, 13.447179),
            LatLng.create(52.549061, 13.422975), LatLng.create(52.497622, 13.396110),
            LatLng.create(52.517683, 13.394393) };

    private List<Marker> markers = new ArrayList<Marker>();

    private GoogleMap map;

    @Override
    public void onModuleLoad() {
        MapOptions mapOpts = MapOptions.create();
        mapOpts.setZoom(12);
        mapOpts.setMapTypeId(MapTypeId.ROADMAP);
        mapOpts.setCenter(BERLIN);
        map = GoogleMap.create(Document.get().getElementById("map_canvas"), mapOpts);
        registerCallback();
    }

    public native void registerCallback() /*-{
                                          // localThis captures this for use within closure
                                          var localThis = this;
                                          $wnd['drop'] = function() {
                                          $entry(localThis.@com.google.maps.gwt.samples.overlays.client.MarkerAnimationsIteration::drop()());
                                          };
                                          }-*/;

    public void drop() {
        deleteOverlays();
        for (int i = 0; i < NEIGHBORHOODS.length; i++) {
            final int idx = i;
            new Timer() {
                public void run() {
                    addMarker(idx);
                }
            }.schedule((i + 1) * 200);
        }
    }

    private void deleteOverlays() {
        if (markers != null) {
            for (Marker marker : markers) {
                marker.setMap((GoogleMap) null);
            }
            markers.clear();
        }
    }

    private void addMarker(int idx) {
        MarkerOptions markerOpts = MarkerOptions.create();
        markerOpts.setPosition(NEIGHBORHOODS[idx]);
        markerOpts.setMap(map);
        markerOpts.setDraggable(false);
        markerOpts.setAnimation(Animation.DROP);
        Marker marker = Marker.create(markerOpts);
        markers.add(marker);
    }
}