@Override
Component getMap() {
OpenStreetMapLayer osm = new OpenStreetMapLayer();
osm.setDisplayName("OSM Streets Base");
GoogleStreetMapLayer gsm = new GoogleStreetMapLayer();
gsm.setDisplayName("Google Streets Base");
GoogleHybridMapLayer ghm = new GoogleHybridMapLayer();
ghm.setDisplayName("Google Hybrid Base");
map.addLayer(osm);
map.addLayer(gsm);
map.addLayer(ghm);
map.setCenter(-104.9, 38);
map.setZoom(6);
map.setSizeFull();
Label l1 =
new Label(
"The map's base layer state should be synchronized between this OptionGroup and the OL LayerSwitcher.");
l1.setSizeUndefined();
final Layer[] layers = {osm, gsm, ghm};
final List<Layer> layerlist = Arrays.asList(layers);
final OptionGroup baseLayers = new OptionGroup("Base Layers", layerlist);
baseLayers.select(osm.getDisplayName());
baseLayers.setNullSelectionAllowed(false);
baseLayers.setImmediate(true);
baseLayers.addValueChangeListener(
new ValueChangeListener() {
public void valueChange(ValueChangeEvent event) {
Layer newlayer = (Layer) event.getProperty().getValue();
if (!newlayer.equals(map.getBaseLayer())) {
map.setBaseLayer(newlayer);
}
}
});
map.addBaseLayerChangeListener(
new BaseLayerChangeListener() {
public void baseLayerChanged(BaseLayerChangeEvent event) {
Layer newBaseLayer = map.getBaseLayer();
if (!newBaseLayer.equals(baseLayers.getValue())) {
baseLayers.select(newBaseLayer);
}
}
});
VerticalLayout vl = new VerticalLayout();
vl.setSizeFull();
vl.addComponent(l1);
vl.addComponent(baseLayers);
vl.addComponent(map);
vl.setExpandRatio(map, 1f);
return vl;
}
