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//
//  Licensed to the Apache Software Foundation (ASF) under one or more
//  contributor license agreements.  See the NOTICE file distributed with
//  this work for additional information regarding copyright ownership.
//  The ASF licenses this file to You 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.
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////////////////////////////////////////////////////////////////////////////////

package mx.states
{

import mx.core.UIComponent;

/**
 *  The IOverride interface is used for view state overrides.
 *  All entries in the State class <code>overrides</code>
 *  property array must implement this interface.
 *
 *  @see mx.states.State
 *  
 *  @langversion 3.0
 *  @playerversion Flash 9
 *  @playerversion AIR 1.1
 *  @productversion Flex 3
 */
public interface IOverride
{
	/**
	 *  Initializes the override.
	 *  Flex calls this method before the first call to the
	 *  <code>apply()</code> method, so you put one-time initialization
	 *  code for the override in this method.
 	 *
	 *  <p>Flex calls this method automatically when the state is entered.
	 *  It should not be called directly.</p>
    *  
    *  @langversion 3.0
    *  @playerversion Flash 9
    *  @playerversion AIR 1.1
    *  @productversion Flex 3
    */
    function initialize():void

	/**
	 *  Applies the override. Flex retains the original value, so that it can 
	 *  restore the value later in the <code>remove()</code> method.
	 *
	 *  <p>This method is called automatically when the state is entered.
	 *  It should not be called directly.</p>
	 *
	 *  @param parent The parent of the state object containing this override.
	 *  The override should use this as its target if an explicit target was
	 *  not specified.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 9
	 *  @playerversion AIR 1.1
	 *  @productversion Flex 3
	 */
	function apply(parent:UIComponent):void;

	/**
	 *  Removes the override. The value remembered in the <code>apply()</code>
	 *  method is restored.
	 *
	 *  <p>This method is called automatically when the state is entered.
	 *  It should not be called directly.</p>
	 *
	 *  @param parent The parent of the state object containing this override.
	 *  The override should use this as its target if an explicit target was
	 *  not specified.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 9
	 *  @playerversion AIR 1.1
	 *  @productversion Flex 3
	 */
	function remove(parent:UIComponent):void;
}
}