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Java > Open Source Codes > com > google > gwt > user > client > ui > ChangeListenerCollection


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.ui;
17
18 import java.util.ArrayList JavaDoc;
19 import java.util.Iterator JavaDoc;
20
21 /**
22  * A helper class for implementers of the SourcesChangeEvents interface. This
23  * subclass of {@linkArrayList} assumes that all objects added to it will be of
24  * type {@link com.google.gwt.user.client.ui.ChangeListener}.
25  */
26 public class ChangeListenerCollection extends ArrayList JavaDoc {
27
28   /**
29    * Fires a change event to all listeners.
30    *
31    * @param sender the widget sending the event.
32    */
33   public void fireChange(Widget sender) {
34     for (Iterator JavaDoc it = iterator(); it.hasNext();) {
35       ChangeListener listener = (ChangeListener) it.next();
36       listener.onChange(sender);
37     }
38   }
39 }
40
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