observer.as

精通Actionscript 3.0 书籍源代码 非常实用

package util {
  /**
   * The interface that must be implemented by all observers of an
   * Observable object.
   */
  public interface Observer {
    /**
     * Invoked automatically by an observed object when it changes.
     * 
     * @param   o   The observed object (an instance of Observable).
     * @param   infoObj   An arbitrary data object sent by 
     *                    the observed object.
     */
    function update(o:Observable, infoObj:Object):void;
  }
}