01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package javax.swing;
19:
20: import javax.swing.event.ChangeEvent;
21: import javax.swing.event.ChangeListener;
22: import javax.swing.event.EventListenerList;
23:
24: public abstract class AbstractSpinnerModel implements SpinnerModel {
25: protected EventListenerList listenerList = new EventListenerList();
26: private ChangeEvent changeEvent;
27:
28: public void addChangeListener(final ChangeListener l) {
29: listenerList.add(ChangeListener.class, l);
30: }
31:
32: public void removeChangeListener(final ChangeListener l) {
33: listenerList.remove(ChangeListener.class, l);
34: }
35:
36: public ChangeListener[] getChangeListeners() {
37: return listenerList.getListeners(ChangeListener.class);
38: }
39:
40: protected void fireStateChanged() {
41: ChangeListener[] list = getChangeListeners();
42: if (list.length == 0) {
43: return;
44: }
45: if (changeEvent == null) {
46: changeEvent = new ChangeEvent(this );
47: }
48: for (int i = 0; i < list.length; i++) {
49: list[i].stateChanged(changeEvent);
50: }
51: }
52:
53: public <T extends java.util.EventListener> T[] getListeners(
54: final Class<T> listenerType) {
55: return listenerList.getListeners(listenerType);
56: }
57: }
|