title: GWT - GXT - How to get Radio Button Value?
body: <p>I am using GWT (Google Web Toolkit) 1.5.3 et GXT (ExtJS) 1.2
  I just want to create a simple form with some radio buttons generated after a RPC call, to get some values</p>
  
  <p>Code:</p>
  
  <pre><code>final FormPanel simple = new FormPanel();
          simple.setFrame(true);
          simple.setWidth(350);
          simple.setHeaderVisible(false);
  
          DateField date = new DateField();
          date.setFieldLabel("Date");
          simple.add(date);
  
          ListFluxServiceAsync service = (ListFluxServiceAsync)
          GWT.create(ListFluxService.class);
          ServiceDefTarget target = (ServiceDefTarget)service;
          String url = GWT.getModuleBaseURL() + "flux.rpc";
          target.setServiceEntryPoint(url);
  
          final RadioGroup radioGroup = new RadioGroup("RadioGroup");
          radioGroup.setFieldLabel("Flux");
          radioGroup.setOrientation(Orientation.VERTICAL);
  
          service.getAllFlux(new AsyncCallback&lt;List&lt;FluxModelData&gt;&gt;(){
  
              public void onFailure(Throwable caught) {
                  GWT.log("flux.rpx::onFailure",  caught);
                  MessageBox.alert("what?", "onFailure :" + caught.getMessage(), null);
              }
  
              public void onSuccess(List&lt;FluxModelData&gt; result) {
  
                  Iterator&lt;FluxModelData&gt; it = result.iterator();
                  while ( it.hasNext() ){
                      FluxModelData fmd = it.next();
                      Radio radio = new Radio();
                      radio.setName("flux");
                      radio.setValue(true);
                      //radio.setRawValue("my very long value");
                      radio.setBoxLabel(fmd.getDescription());
                      radioGroup.add(radio);
                  }
  
                  simple.add(radioGroup);
                  simple.layout(); //we need it to show the radio button
  
              }
          });
  
  
  
          simple.setButtonAlign(HorizontalAlignment.CENTER);
  
          Button button = new Button("Récupérer");
          button.addSelectionListener(new SelectionListener&lt;ButtonEvent&gt;(){
  
              @Override
              public void componentSelected(ButtonEvent ce) {
  
                  MessageBox.alert("what?", radioGroup.getValue().getRawValue() , null);
  
              }});
  
          simple.addButton(button);
  
  
          RootPanel.get().add(simple);
  </code></pre>
  
  <p>My problem is I can't set/get radio button value. 
  If I try the setRawValue("xxxxxxx"), I will get some null errors, while setting setValue(boolean) is working but I was expecting getting the radio value and not the label value.</p>
  
  <p>Any Idea?</p>