com.google.livingstories.client.lsp.views.contentitems.LocationView.java Source code

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Here is the source code for com.google.livingstories.client.lsp.views.contentitems.LocationView.java

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/**
 * Copyright 2010 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.livingstories.client.lsp.views.contentitems;

import com.google.livingstories.client.Location;
import com.google.livingstories.client.util.LivingStoryData;
import com.google.gwt.ajaxloader.client.AjaxLoader;
import com.google.gwt.ajaxloader.client.AjaxLoader.AjaxLoaderOptions;
import com.google.gwt.core.client.GWT;
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.SmallMapControl;
import com.google.gwt.maps.client.event.MarkerClickHandler;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.maps.client.overlay.Marker;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * Renders a map view with a 'Location' header.
 */
public class LocationView extends Composite {
    private static LocationViewUiBinder uiBinder = GWT.create(LocationViewUiBinder.class);

    interface LocationViewUiBinder extends UiBinder<Widget, LocationView> {
    }

    private static final int MAPS_WIDTH = 240;
    private static final int MAPS_HEIGHT = 240;
    private static final int MAPS_ZOOM = 10;

    @UiField
    SimplePanel content;

    private Location location;

    public LocationView(Location location) {
        this.location = location;

        initWidget(uiBinder.createAndBindUi(this));

        AjaxLoaderOptions options = AjaxLoaderOptions.newInstance();
        options.setOtherParms(LivingStoryData.getMapsKey() + "&sensor=false");

        // Instantiating the map via a runnable breaks horribly on firefox, for reasons
        // that are still mysterious to us. If we introduce some delay, though,
        // it works fine, and doesn't greatly hurt overall page functionality.
        AjaxLoader.loadApi("maps", "2", new Runnable() {
            @Override
            public void run() {
                new Timer() {
                    @Override
                    public void run() {
                        content.add(createMap());
                    }
                }.schedule(1000);
            }
        }, options);
    }

    private MapWidget createMap() {
        final String description = location.getDescription();
        LatLng latLng = LatLng.newInstance(location.getLatitude(), location.getLongitude());

        final MapWidget map = new MapWidget(latLng, MAPS_ZOOM);
        map.setSize(MAPS_WIDTH + "px", MAPS_HEIGHT + "px");
        map.addControl(new SmallMapControl());
        map.setDoubleClickZoom(true);
        map.setDraggable(true);
        map.setScrollWheelZoomEnabled(true);
        if (!description.isEmpty()) {
            final Marker marker = new Marker(latLng);
            map.addOverlay(marker);
            final InfoWindowContent iwc = new InfoWindowContent(description);
            marker.addMarkerClickHandler(new MarkerClickHandler() {
                @Override
                public void onClick(MarkerClickEvent event) {
                    InfoWindow infoWindow = map.getInfoWindow();
                    if (infoWindow.isVisible()) {
                        infoWindow.close();
                    } else {
                        infoWindow.open(marker, iwc);
                    }
                }
            });
            map.setTitle(description);
        }
        return map;
    }
}