GeoGWT - MapPanel

Source

Below is all you need to setup the example.

public class Mappanel_div implements EntryPoint {

    /* (non-Javadoc)
     * @see com.google.gwt.core.client.EntryPoint#onModuleLoad()
     */
    public void onModuleLoad() {
        GXT.hideLoadingPanel("loading");

        /**
         * Adding widgets to Viewport panels
         */
        ContentPanel mappanel_div = new ContentPanel();
        mappanel_div.setLayout(new FitLayout());
        mappanel_div.setHeaderVisible(true);
        mappanel_div.setHeading("GeoGWT MapPanel Example");
        mappanel_div.addListener(Events.Resize, new Listener() {

            public void handleEvent(BaseEvent be) {
                Dispatcher.forwardEvent(GeoGWTEvents.UPDATE_MAP_SIZE);
            }
        });
        mappanel_div.addListener(Events.Move, new Listener() {

            public void handleEvent(BaseEvent be) {
                Dispatcher.forwardEvent(GeoGWTEvents.UPDATE_MAP_SIZE);
            }
        });
        mappanel_div.setMonitorWindowResize(true);
        mappanel_div.setLayoutOnChange(true);

        RootPanel.get("mappanel").add(mappanel_div);
        
        // Example initialization with default base layer
        /** Dispatcher.forwardEvent(GeoGWTEvents.INIT_MAPS_UI_MODULE, true); **/

        // Example initialization with map options and a default layer
        /* map options */
        MapOptions mapOptions = new MapOptions();
        mapOptions.setUnits(MapUnits.DEGREES);
        mapOptions.setProjection("EPSG:4326");

        Dispatcher.forwardEvent(GeoGWTEvents.INIT_MAPS_UI_MODULE, mapOptions);
        
        /* base layer */
        WMSParams wmsParams = new WMSParams();
        wmsParams.setFormat("image/png");
        wmsParams.setLayers("GeoSolutions:ne_shaded");
        wmsParams.setStyles("");

        WMSOptions wmsLayerParams = new WMSOptions();
        wmsLayerParams.setTransitionEffect(TransitionEffect.RESIZE);

        WMS layer = new WMS("GeoSolutions Natural Earth", "http://demo1.geo-solutions.it/playground/wms", wmsParams, wmsLayerParams);
        Dispatcher.forwardEvent(GeoGWTEvents.ADD_LAYER, layer);

        
        // Attaching the map to the panel
        Dispatcher.forwardEvent(GeoGWTEvents.ATTACH_MAP_WIDGET, mappanel_div);

        // Adjusting the Zoom level
        // Dispatcher.forwardEvent(GeoGWTEvents.ZOOM_TO_MAX_EXTENT);
        Dispatcher.forwardEvent(GeoGWTEvents.SET_MAP_CENTER, new Double[] {13.0, 42.0});
        Dispatcher.forwardEvent(GeoGWTEvents.ZOOM, 5);
        
        /**
         * Must be done after the dispatch...
         */
        mappanel_div.setWidth(558);
        mappanel_div.setHeight(333);

    }
}