--- a/flys-client/src/main/java/de/intevation/flys/client/client/ui/ParameterList.java	Wed Jul 18 09:57:21 2012 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/ui/ParameterList.java	Wed Jul 18 12:12:46 2012 +0000
@@ -330,6 +330,7 @@
 
         handler.addStepForwardHandler(new StepForwardHandler() {
             public void onStepForward(StepForwardEvent event) {
+                lockUI();
                 Data[] data = event.getData();
 
                 DataItem[] moduleItems = data[0].getItems();
@@ -340,6 +341,7 @@
 
                 if (module == null) {
                     // TODO throw / show error!
+                    unlockUI();
                     return;
                 }
 
@@ -355,6 +357,7 @@
                     locale, module.toLowerCase(), null,
                     new AsyncCallback<Artifact>() {
                         public void onFailure(Throwable caught) {
+                            unlockUI();
                             GWT.log("Could not create the new artifact.");
                             SC.warn(MSG.getString(caught.getMessage()));
                         }
@@ -365,6 +368,7 @@
                             forwardService.go(locale, artifact, feedData,
                             new AsyncCallback<Artifact>() {
                                 public void onFailure(Throwable caught) {
+                                    unlockUI();
                                     GWT.log("Could not feed the artifact.");
                                     SC.warn(caught.getMessage());
                                 }
@@ -374,6 +378,7 @@
                                     old.clear();
                                     cView.addArtifactToCollection(artifact);
                                     setArtifact(artifact);
+                                    unlockUI();
                                 }
                             });
                         }
@@ -582,6 +587,7 @@
      */
     public void onStepForward(StepForwardEvent event) {
         GWT.log("CollectionView - onStepForward()");
+        lockUI();
 
         Config config = Config.getInstance();
         String locale = config.getLocale();
@@ -589,6 +595,7 @@
         forwardService.go(locale, artifact, event.getData(),
             new AsyncCallback<Artifact>() {
                 public void onFailure(Throwable caught) {
+                    unlockUI();
                     GWT.log("Could not feed the artifact.");
                     SC.warn(MSG.getString(caught.getMessage()));
                 }
@@ -598,6 +605,7 @@
                     old.clear();
 
                     setArtifact(artifact, true);
+                    unlockUI();
                 }
         });
     }
@@ -610,6 +618,7 @@
      * @param e The StepBackEvent that holds the identifier of the target state.
      */
     public void onStepBack(StepBackEvent e) {
+        lockUI();
         final String target    = e.getTarget();
 
         Config config          = Config.getInstance();
@@ -618,6 +627,7 @@
         advanceService.advance(locale, artifact, target,
             new AsyncCallback<Artifact>() {
                 public void onFailure(Throwable caught) {
+                    unlockUI();
                     GWT.log("Could not go back to '" + target + "'");
                     SC.warn(MSG.getString(caught.getMessage()));
                 }
@@ -628,6 +638,7 @@
                     old.clear();
 
                     setArtifact(artifact, false);
+                    unlockUI();
                 }
             }
         );
@@ -874,5 +885,15 @@
     public void registerCollectionViewTabHandler (TabSelectedHandler tsh) {
         this.cView.registerTabHandler (tsh);
     }
+
+
+    protected void lockUI() {
+        cView.lockUI();
+    }
+
+
+    protected void unlockUI() {
+        cView.unlockUI();
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :