Java/GWT/Widget

Get Widget Absolute Position

package com.jexp.gwt.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.HTML;
public class GWTClient implements EntryPoint {
  public void onModuleLoad() {
    Button b = new Button("Click me", new ClickListener() {
      public void onClick(Widget sender) {
        MyPopup p = new MyPopup();
        int left = sender.getAbsoluteLeft() + 10;
        int top = sender.getAbsoluteTop() + 10;
        p.setPopupPosition(left, top);
        p.show();
      }
    });
    RootPanel.get().add(b);
  }
}
class MyPopup extends PopupPanel {
  public MyPopup() {
    super(true);
    HTML contents = new HTML("Click anywhere outside this popup to make it disappear.");
    contents.setWidth("128px");
    setWidget(contents);
    setStyleName("popups-Popup");
  }
}