user/src/com/google/gwt/user/client/ui/TreeListener.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.user.client.ui;

import java.util.EventListener;

/**
 * Event listener interface for tree events.
 */
public interface TreeListener extends EventListener {

  /**
   * Fired when a tree item is selected.
   * 
   * @param item the item being selected.
   */
  void onTreeItemSelected(TreeItem item);

  /**
   * Fired when a tree item is opened or closed.
   * 
   * @param item the item whose state is changing.
   */
  void onTreeItemStateChanged(TreeItem item);
}