How to use

MapWidget

in

org.gwtopenmaps.openlayers.client

  public void execute() {
    getMap().updateSize();
  }
});

/**
 * Programmatically creates the element that will contain the map,
 * with the given width and height.
 *
 * The map itself is instantiated upon calling {@link #getMap()}.
 *
 * @param width - a String with the width of the element that will contain the map in CSS units.
 * @param height - a String with the height of the element that will contain the map in CSS units.
 * @param options - null if no options should be set upon map instantiation
 *      or a MapOptions object that is passed to the map upon instantiation.
 *
 * @since GWT-OL 0.2
 */
public MapWidget(String width, String height, MapOptions options) {
  Element e = DOM.createDiv();
  this.options = options;
  setElement(e);
  setWidth(width);
  setHeight(height);
}

private void initializeMapWidget(String cssHeight) {
  initializeDefaultMapOptions();
  mapWidget = new MapWidget("100%", cssHeight, defaultMapOptions);
  map = mapWidget.getMap();
  addMapControls(defaultMapOptions);
}

public void resizeTo(int width, int height) {
  mapWidget.setHeight(height + "px");
  mapWidget.setWidth(width + "px");
  this.width = width;
  this.height = height;
}

/**
 * Gets the map associated with a MapWidget instance.
 *
 * The map is instantiated when this method is called for the first time.
 *
 * @return Map - see {@link Map}.
 */
public Map getMap() {
  //The preference here is lazy initalization
  if (map == null) {
    if (options == null) {
      map = new Map(getElement());
    } else {
      map = new Map(getElement(), options);
    }
  }
  return map;
}

/**
 * Gets the map associated with a MapWidget instance.
 *
 * The map is instantiated when this method is called for the first time.
 *
 * @return Map - see {@link Map}.
 */
public Map getMap()
{
  //The preference here is lazy initalization
  if (map == null)
  {
    if (options == null)
      map = new Map(getElement());
    else
      map = new Map(getElement(), options);
  }
  return map;
}

/**
 * Programmatically creates the element that will contain the map, with the
 * given width and height.
 *
 * The map itself is instantiated upon calling {@link #getMap()}.
 *
 * @param width - a String with the width of the element that will contain
 * the map in CSS units.
 * @param height - a String with the height of the element that will contain
 * the map in CSS units.
 * @param options - null if no options should be set upon map instantiation
 * or a MapOptions object that is passed to the map upon instantiation.
 *
 * @since GWT-OL 0.2
 */
public MapWidget(String width, String height, MapOptions options) {
  Element e = DOM.createDiv();
  this.options = options;
  setElement(e);
  setWidth(width);
  setHeight(height);
}

  public void onResize() {
    getMap().updateSize();
  }
}

mapWidget = new MapWidget("100%", "100%", defaultMapOptions);
this.map = mapWidget.getMap();

  public void execute() {
    getMap().updateSize();
  }
});

public void onModuleLoad()
 {
   MapOptions mapOptions = new MapOptions();
   MapWidget mapWidget = new MapWidget( "400px", "300px", mapOptions );
   OSM osm_1 = OSM.Mapnik( "Mapnik" );
   OSM osm_2 = OSM.CycleMap( "CycleMap" );
   osm_1.setIsBaseLayer( true );
   osm_2.setIsBaseLayer( true );
   LonLat lonLat = new LonLat( 6.95, 50.94 );
   lonLat.transform( "EPSG:4326", "EPSG:900913" );
   Map map = mapWidget.getMap();
   map.addLayer( osm_1 );
   map.addLayer( osm_2 );
   map.addControl( new LayerSwitcher() );
   map.addControl( new MousePosition() );
   map.setCenter( lonLat, 12 );
   RootPanel.get().add( mapWidget );
 }