25.3. Hooking up a GWT widget to the Seam component

private MyServiceAsync getService() {       
  String endpointURL = GWT.getModuleBaseURL() + "seam/resource/gwt";      
      
  MyServiceAsync svc = (MyServiceAsync) GWT.create(MyService.class);
  ((ServiceDefTarget) svc).setServiceEntryPoint(endpointURL);
  return svc;     
}

public class AskQuestionWidget extends Composite {
  private AbsolutePanel panel = new AbsolutePanel();
   
  public AskQuestionWidget() {      
    Label lbl = new Label("OK, what do you want to know?");
    panel.add(lbl);
    final TextBox box = new TextBox();
    box.setText("What is the meaning of life?");
    panel.add(box);
    Button ok = new Button("Ask");
    
    ok.addClickListener(new ClickListener() {
    
      public void onClick(Widget w) {
        ValidationUtility valid = new ValidationUtility();
        if (!valid.isValid(box.getText())) {
          Window.alert("A question has to end with a '?'");
        } else {
          askServer(box.getText());
        } 
      }
    });
    panel.add(ok);
      
    initWidget(panel);
  }

  private void askServer(String text) {
    getService().askIt(text, new AsyncCallback() {
    public void onFailure(Throwable t) {
      Window.alert(t.getMessage());
    }

    public void onSuccess(Object data) {
      Window.alert((String) data);
    }         
  });      
}
   
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