Focusable.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 org.waveprotocol.wave.client.wavepanel.event;

/**
 * Something that can gain and lose keyboard focus.
 *
 */
public interface Focusable extends KeySignalHandler {

  /** Notifies this focusable that it has gained application focus. */
  void onFocus();

  /** Notifies this focusable that it has lost application focus. */
  void onBlur();
}