2.1/user/src/com/google/gwt/user/client/ui/RequiresResize.java

/*
 * Copyright 2009 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;

/**
 * This interface designates that its implementor needs to be informed whenever
 * its size is modified.
 * 
 * <p>
 * Widgets that implement this interface should only be added to those that
 * implement {@link ProvidesResize}. Failure to do so will usually result in
 * {@link #onResize()} not being called.
 * </p>
 */
public interface RequiresResize {

  /**
   * This method must be called whenever the implementor's size has been
   * modified.
   */
  void onResize();
}