GWT UiBinder で Button を使う

<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
  xmlns:g="urn:import:com.google.gwt.user.client.ui">
  <ui:style>
  
  </ui:style>
  <g:HTMLPanel>
    <g:HorizontalPanel spacing="10">
      <g:Button ui:field="button">Normal Button</g:Button>
      <g:Button enabled="false">Disabled Button</g:Button>
    </g:HorizontalPanel>
  </g:HTMLPanel>
</ui:UiBinder> 

package yanzm.example.hellowtgt.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Widget;

public class BasicButton extends Composite {

  private static BasicButtonUiBinder uiBinder = GWT
    .create(BasicButtonUiBinder.class);

    interface BasicButtonUiBinder extends UiBinder<Widget, BasicButton> {
  }

  @UiField
  public Button button; 

  public BasicButton() {
    initWidget(uiBinder.createAndBindUi(this));
    button.addClickHandler(new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        Window.alert("Clicked!");
      }   
    }); 
  }
}

■ その他
・Java code による実装例 (Showcase)
・com.google.gwt.user.client.ui.Button