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Java > Open Source Codes > com > google > gwt > user > client > HistoryListener


1 /*
2  * Copyright 2007 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 package com.google.gwt.user.client;
17
18 /**
19  * Implement this interface to receive notification of changes to the browser
20  * history state. It is used with {@link com.google.gwt.user.client.History}.
21  */
22 public interface HistoryListener extends java.util.EventListener JavaDoc {
23
24   /**
25    * Fired when the user clicks the browser's 'back' or 'forward' buttons.
26    *
27    * @param historyToken the token representing the current history state
28    */
29   void onHistoryChanged(String JavaDoc historyToken);
30 }
31
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