AcceptsOneWidget.java

/*
 * Copyright 2010 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;

/**
 * Implemented by displays that can be given accept an {@link IsWidget}
 * to show.
 */
public interface AcceptsOneWidget {

  /**
   * Set the only widget of the receiver, replacing the previous
   * widget if there was one.
   *
   * @param w the widget, or <code>null</code> to remove the widget
   *
   * @see SimplePanel
   */
  void setWidget(IsWidget w);
}