01 /*
02 * Copyright 2008-2017 the original author or authors.
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
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 griffon.javafx.collections;
17
18 import com.sun.javafx.collections.SetListenerHelper;
19 import javafx.beans.InvalidationListener;
20 import javafx.collections.ObservableSet;
21 import javafx.collections.SetChangeListener;
22
23 import java.util.AbstractSet;
24
25 /**
26 * @author Andres Almiray
27 * @since 2.9.0
28 */
29 public abstract class ObservableSetBase<E> extends AbstractSet<E> implements ObservableSet<E> {
30 private SetListenerHelper<E> listenerHelper;
31
32 @Override
33 public final void addListener(InvalidationListener listener) {
34 listenerHelper = SetListenerHelper.addListener(listenerHelper, listener);
35 }
36
37 @Override
38 public final void removeListener(InvalidationListener listener) {
39 listenerHelper = SetListenerHelper.removeListener(listenerHelper, listener);
40 }
41
42 @Override
43 public final void addListener(SetChangeListener<? super E> listener) {
44 listenerHelper = SetListenerHelper.addListener(listenerHelper, listener);
45 }
46
47 @Override
48 public final void removeListener(SetChangeListener<? super E> listener) {
49 listenerHelper = SetListenerHelper.removeListener(listenerHelper, listener);
50 }
51
52 protected final void fireChange(SetChangeListener.Change<? extends E> change) {
53 SetListenerHelper.fireValueChangedEvent(listenerHelper, change);
54 }
55
56 /**
57 * Returns true if there are some listeners registered for this list.
58 */
59 protected final boolean hasListeners() {
60 return SetListenerHelper.hasListeners(listenerHelper);
61 }
62 }
|