Отложеная подгрузка скрипта

    button3.addClickHandler(new ClickHandler() {

      public void onClick(ClickEvent event) {
        final MyProxy myproxy = new MyProxy();

        AsyncCallback collback = new AsyncCallback() {

          public void onFailure(Throwable caught) {

          }

          public void onSuccess(Object result) {

            Timer timer = new Timer() {

              @Override
              public void run() {
                Button btn = myproxy.getApp().getButton();
                RootPanel.get().add(btn);
              }
            };
            timer.run();
            timer.scheduleRepeating(10);
          }
        };


        myproxy.getInstance(collback);

      }
    });

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/*
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package org.yournamehere.client.util;


import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.ui.Button;

/**
*
* @author salnikov
*/
public interface MyApp extends RemoteService {


  String getWindow();

   public Button getButton();

}

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/*
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* and open the template in the editor.
*/

package org.yournamehere.client.util;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.user.client.rpc.AsyncCallback;

/**
*
* @author salnikov
*/
public class MyProxy {

  private MyApp app;

  public void getInstance( final AsyncCallback collback ) {


    GWT.runAsync(new RunAsyncCallback() {

      public void onFailure(Throwable reason) {
        collback.onFailure(reason);
      }

      public void onSuccess() {
        app = new OrgApp();
        collback.onSuccess(this);
      }
    });


  }

  public MyApp getApp() {
    return app;
  }

  public void setApp(MyApp app) {
    this.app = app;
  }
}

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/*
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* and open the template in the editor.
*/

package org.yournamehere.client.util;

import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;



/**
*
* @author salnikov
*/
public class OrgApp implements MyApp {


private static int counter = 0;
  
  public String getWindow() {
     
    return "window from Proxy";
  }

  public Button getButton() {
    counter++;
    return new Button("num "+counter);
  }

}

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