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

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Here is the source code for com.google.maps.gwt.samples.overlays.client.PolygonArrays.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.safehtml.shared.SafeHtmlBuilder;
import com.google.maps.gwt.client.GoogleMap;
import com.google.maps.gwt.client.InfoWindow;
import com.google.maps.gwt.client.LatLng;
import com.google.maps.gwt.client.MVCArray;
import com.google.maps.gwt.client.MapOptions;
import com.google.maps.gwt.client.MapTypeId;
import com.google.maps.gwt.client.MouseEvent;
import com.google.maps.gwt.client.Polygon;
import com.google.maps.gwt.client.PolygonOptions;
import com.google.maps.gwt.client.Polygon.ClickHandler;

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

    private static final LatLng CENTER = LatLng.create(24.886436490787712, -70.2685546875);
    private GoogleMap map;
    private Polygon bermudaTriangle;
    private static final MVCArray<MVCArray<LatLng>> triangleCoords = MVCArray.create();
    private InfoWindow infowindow;

    static {
        MVCArray<LatLng> path = MVCArray.create();
        path.push(LatLng.create(25.774252, -80.190262));
        path.push(LatLng.create(18.466465, -66.118292));
        path.push(LatLng.create(32.321384, -64.75737));
        triangleCoords.push(path);
    }

    @Override
    public void onModuleLoad() {
        MapOptions mapOpts = MapOptions.create();
        mapOpts.setZoom(5);
        mapOpts.setCenter(CENTER);
        mapOpts.setMapTypeId(MapTypeId.TERRAIN);
        map = GoogleMap.create(Document.get().getElementById("map_canvas"), mapOpts);

        // Construct the polygon
        // Note that we do specify an array of arrays.
        PolygonOptions polyOpts = PolygonOptions.create();

        polyOpts.setPaths(triangleCoords);
        polyOpts.setStrokeColor("#FF0000");
        polyOpts.setStrokeOpacity(0.6);
        polyOpts.setStrokeWeight(3);
        polyOpts.setFillColor("#FF0000");
        polyOpts.setFillOpacity(0.35);

        bermudaTriangle = Polygon.create(polyOpts);

        bermudaTriangle.setMap(map);
        bermudaTriangle.addClickListener(new ClickHandler() {
            public void handle(MouseEvent event) {
                showArrays(event);
            }
        });
        infowindow = InfoWindow.create();
    }

    private void showArrays(MouseEvent event) {
        // Since this Polygon only has one path, we can call getPath()
        // to return the MVCArray of LatLngs
        MVCArray<LatLng> vertices = bermudaTriangle.getPath();

        SafeHtmlBuilder contentString = new SafeHtmlBuilder();
        contentString.appendHtmlConstant("<b>Bermuda Triangle Polygon</b><br />");

        contentString.appendHtmlConstant("Clicked Location: <br />");
        contentString.append(event.getLatLng().lat());
        contentString.appendHtmlConstant(",");
        contentString.append(event.getLatLng().lng());
        contentString.appendHtmlConstant("<br />");

        // Iterate over the vertices.
        for (int i = 0; i < vertices.getLength(); i++) {
            LatLng xy = vertices.getAt(i);
            contentString.appendHtmlConstant("<br /> Coordinate: ");
            contentString.append(i);
            contentString.appendHtmlConstant("<br />");
            contentString.append(xy.lat());
            contentString.appendHtmlConstant(",");
            contentString.append(xy.lng());
        }

        // Replace our Info Window's content and position
        infowindow.setContent(contentString.toSafeHtml().asString());
        infowindow.setPosition(event.getLatLng());

        infowindow.open(map);
    }
}