user/javadoc/com/google/gwt/examples/PopupPanelExample.java

/*
 * Copyright 2006 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.examples;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;

public class PopupPanelExample implements EntryPoint, ClickListener {

  private static class MyPopup extends PopupPanel {

    public MyPopup() {
      // PopupPanel's constructor takes 'auto-hide' as its boolean parameter.
      // If this is set, the panel closes itself automatically when the user
      // clicks outside of it.
      super(true);

      // PopupPanel is a SimplePanel, so you have to set it's widget property to
      // whatever you want its contents to be.
      setWidget(new Label("Click outside of this popup to close it"));
    }
  }

  public void onModuleLoad() {
    Button b = new Button("Click me");
    b.addClickListener(this);

    RootPanel.get().add(b);
  }

  public void onClick(Widget sender) {
    // Instantiate the popup and show it.
    new MyPopup().show();
  }
}