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Java > Open Source Codes > org > apache > cocoon > woody > formmodel > BooleanFieldDefinition


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of 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,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.cocoon.woody.formmodel;
17
18 import org.apache.cocoon.woody.event.WidgetEventMulticaster;
19 import org.apache.cocoon.woody.event.ValueChangedEvent;
20 import org.apache.cocoon.woody.event.ValueChangedListener;
21
22 /**
23  * The {@link WidgetDefinition} part of a BooleanField widget, see {@link BooleanField} for more information.
24  *
25  * @version $Id: BooleanFieldDefinition.java 30932 2004-07-29 17:35:38Z vgritsenko $
26  */
27 public class BooleanFieldDefinition extends AbstractWidgetDefinition {
28     private ValueChangedListener listener;
29
30     public Widget createInstance() {
31         return new BooleanField(this);
32     }
33     
34     public void addValueChangedListener(ValueChangedListener listener) {
35         this.listener = WidgetEventMulticaster.add(this.listener, listener);
36     }
37     
38     public void fireValueChangedEvent(ValueChangedEvent event) {
39         if (this.listener != null) {
40             this.listener.valueChanged(event);
41         }
42     }
43
44     public boolean hasValueChangedListeners() {
45         return listener != null;
46     }
47 }
48
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