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


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
23  * {@link com.google.gwt.user.client.ui.SourcesTabEvents} interface. This
24  * subclass of {@linkArrayList} assumes that all objects added to it will be of
25  * type {@link com.google.gwt.user.client.ui.TabListener}.
26  */
27 public class TabListenerCollection extends ArrayList JavaDoc {
28
29   /**
30    * Fires a beforeTabSelected event to all listeners.
31    *
32    * @param sender the widget sending the event
33    * @param tabIndex the index of the tab being selected
34    */
35   public boolean fireBeforeTabSelected(SourcesTabEvents sender, int tabIndex) {
36     for (Iterator JavaDoc it = iterator(); it.hasNext();) {
37       TabListener listener = (TabListener) it.next();
38       if (!listener.onBeforeTabSelected(sender, tabIndex)) {
39         return false;
40       }
41     }
42     return true;
43   }
44
45   /**
46    * Fires a tabSelected event to all listeners.
47    *
48    * @param sender the widget sending the event
49    * @param tabIndex the index of the tab being selected
50    */
51   public void fireTabSelected(SourcesTabEvents sender, int tabIndex) {
52     for (Iterator JavaDoc it = iterator(); it.hasNext();) {
53       TabListener listener = (TabListener) it.next();
54       listener.onTabSelected(sender, tabIndex);
55     }
56   }
57 }
58
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