Added Application Loader

src/main/java/org/gcube/portlets/user/geoportaldataviewer/client/GeoportalDataViewer.java

@@ -32,6 +32,7 @@ import org.gcube.portlets.user.geoportaldataviewer.client.gis.ExtentWrapped;
 import org.gcube.portlets.user.geoportaldataviewer.client.gis.MapUtils;
 import org.gcube.portlets.user.geoportaldataviewer.client.gis.OpenLayerMap;
 import org.gcube.portlets.user.geoportaldataviewer.client.ui.GeonaDataViewMainPanel;
+import org.gcube.portlets.user.geoportaldataviewer.client.util.LoaderIcon;
 import org.gcube.portlets.user.geoportaldataviewer.client.util.URLUtil;
 import org.gcube.portlets.user.geoportaldataviewer.shared.gis.BaseMapLayer;
 import org.gcube.portlets.user.geoportaldataviewer.shared.gis.GeoQuery;
@@ -41,6 +42,10 @@ import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.Scheduler;
 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
 import com.google.gwt.core.client.ScriptInjector;
+import com.google.gwt.dom.client.Style;
+import com.google.gwt.dom.client.Style.Display;
+import com.google.gwt.dom.client.Style.Position;
+import com.google.gwt.dom.client.Style.Unit;
 import com.google.gwt.event.logical.shared.ResizeEvent;
 import com.google.gwt.event.logical.shared.ResizeHandler;
 import com.google.gwt.event.shared.HandlerManager;
@@ -94,7 +99,7 @@ public class GeoportalDataViewer implements EntryPoint {
 
 	int attempt = 0;
 	
-	//private LoaderIcon loaderApp = new LoaderIcon("Loading application....");
+	private LoaderIcon loaderApp = new LoaderIcon("Loading application... please wait");
 	
 	private HTML attributionDiv = new HTML();
 	
@@ -104,11 +109,9 @@ public class GeoportalDataViewer implements EntryPoint {
 	 * This is the entry point method.
 	 */
 	public void onModuleLoad() {
-		
-//		Style style = loaderApp.getElement().getStyle();
-//		style.setZIndex(300);
-//		style.setMarginTop(50,Unit.PX);
-//		style.setMarginLeft(50, Unit.PX);
+
+		loaderApp.getElement().addClassName("loader-gna-app");
+		RootPanel.get(APP_DIV).add(loaderApp);
 		
 		paramWmsRequest = Window.Location.getParameter(GeoportalDataViewerConstants.GET_WMS_PARAMETER);
 		paramGeonaItemType = Window.Location.getParameter(GeoportalDataViewerConstants.GET_GEONA_ITEM_TYPE);
@@ -119,7 +122,7 @@ public class GeoportalDataViewer implements EntryPoint {
 		GWT.log(GeoportalDataViewerConstants.GET_GEONA_ITEM_ID + " = " + paramGeonaItemID);
 		GWT.log(GeoportalDataViewerConstants.GET_LAYER_TITLE + " = " + paramLayerTitle);
 		
-		//RootPanel.get(APP_DIV).add(loaderApp);
+		RootPanel.get(APP_DIV).add(loaderApp);
 		
 		mainPanel = new GeonaDataViewMainPanel(applicationBus, getClientHeight());
 		RootPanel.get(APP_DIV).add(mainPanel);
@@ -134,13 +137,17 @@ public class GeoportalDataViewer implements EntryPoint {
 
 					@Override
 					public void onFailure(Throwable caught) {
-						//RootPanel.get(APP_DIV).remove(loaderApp);
+						RootPanel.get(APP_DIV).remove(loaderApp);
 						Window.alert("Error occurred on instancing the GeoPortale Viewer. Please, contact the support");
 					}
 
 					@Override
 					public void onSuccess(List<BaseMapLayer> listBaseMapLayers) {
-						//RootPanel.get(APP_DIV).remove(loaderApp);
+						try {
+						RootPanel.get(APP_DIV).remove(loaderApp);
+						}catch (Exception e) {
+							loaderApp.setVisible(false);
+						}
 						GeoportalDataViewer.listBaseMapLayers = listBaseMapLayers;
 						//now the map is loaded and I'm sure that I can load the GeonaDataViewer Profile
 						loadGeonaDataViewerProfile();

src/main/webapp/GeoportalDataViewer.css

@@ -443,4 +443,11 @@ body {
     background-color: #f3f3f3 !important;
     text-decoration: none;
 }
+
+.loader-gna-app {
+	z-index: 50;
+	position: absolute;
+	top: 50%;
+	left: 50%;
+}