Source Code Cross Referenced for AWTEventMulticaster.java in  » Apache-Harmony-Java-SE » java-package » java » awt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.awt 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         */
017:
018:        package java.awt;
019:
020:        import java.awt.event.ActionEvent;
021:        import java.awt.event.ActionListener;
022:        import java.awt.event.AdjustmentEvent;
023:        import java.awt.event.AdjustmentListener;
024:        import java.awt.event.ComponentEvent;
025:        import java.awt.event.ComponentListener;
026:        import java.awt.event.ContainerEvent;
027:        import java.awt.event.ContainerListener;
028:        import java.awt.event.FocusEvent;
029:        import java.awt.event.FocusListener;
030:        import java.awt.event.HierarchyBoundsListener;
031:        import java.awt.event.HierarchyEvent;
032:        import java.awt.event.HierarchyListener;
033:        import java.awt.event.InputMethodEvent;
034:        import java.awt.event.InputMethodListener;
035:        import java.awt.event.ItemEvent;
036:        import java.awt.event.ItemListener;
037:        import java.awt.event.KeyEvent;
038:        import java.awt.event.KeyListener;
039:        import java.awt.event.MouseEvent;
040:        import java.awt.event.MouseListener;
041:        import java.awt.event.MouseMotionListener;
042:        import java.awt.event.MouseWheelEvent;
043:        import java.awt.event.MouseWheelListener;
044:        import java.awt.event.TextEvent;
045:        import java.awt.event.TextListener;
046:        import java.awt.event.WindowEvent;
047:        import java.awt.event.WindowFocusListener;
048:        import java.awt.event.WindowListener;
049:        import java.awt.event.WindowStateListener;
050:        import java.io.IOException;
051:        import java.io.ObjectOutputStream;
052:        import java.lang.reflect.Array;
053:        import java.util.EventListener;
054:        import java.util.LinkedList;
055:
056:        import org.apache.harmony.awt.internal.nls.Messages;
057:
058:        public class AWTEventMulticaster implements  ComponentListener,
059:                ContainerListener, FocusListener, KeyListener, MouseListener,
060:                MouseMotionListener, WindowListener, WindowFocusListener,
061:                WindowStateListener, ActionListener, ItemListener,
062:                AdjustmentListener, TextListener, InputMethodListener,
063:                HierarchyListener, HierarchyBoundsListener, MouseWheelListener {
064:
065:            protected final EventListener a;
066:
067:            protected final EventListener b;
068:
069:            protected static EventListener addInternal(EventListener a,
070:                    EventListener b) {
071:                if (a == null) {
072:                    return b;
073:                } else if (b == null) {
074:                    return a;
075:                } else {
076:                    return new AWTEventMulticaster(a, b);
077:                }
078:            }
079:
080:            protected static EventListener removeInternal(EventListener l,
081:                    EventListener oldl) {
082:                if ((l == oldl) || (l == null)) {
083:                    return null;
084:                } else if (l instanceof  AWTEventMulticaster) {
085:                    return ((AWTEventMulticaster) l).remove(oldl);
086:                } else {
087:                    return l;
088:                }
089:            }
090:
091:            protected static void save(ObjectOutputStream s, String k,
092:                    EventListener l) throws IOException {
093:                s.writeChars(k);
094:                s.writeObject(l);
095:            }
096:
097:            @SuppressWarnings("unchecked")
098:            public static <T extends EventListener> T[] getListeners(
099:                    EventListener l, Class<T> listenerType)
100:                    throws ClassCastException {
101:                if (l == null) {
102:                    return (T[]) Array.newInstance(listenerType, 0);
103:                }
104:                return addListeners(l, listenerType, new LinkedList<T>())
105:                        .toArray((T[]) Array.newInstance(listenerType, 0));
106:            }
107:
108:            @SuppressWarnings("unchecked")
109:            private static <T extends EventListener> LinkedList<T> addListeners(
110:                    EventListener l, Class<T> listenerType, LinkedList<T> list) {
111:                if (l instanceof  AWTEventMulticaster) {
112:                    AWTEventMulticaster ml = (AWTEventMulticaster) l;
113:
114:                    addListeners(ml.a, listenerType, list);
115:                    addListeners(ml.b, listenerType, list);
116:                } else {
117:                    if (l.getClass().isAssignableFrom(listenerType)) {
118:                        list.add((T) l);
119:                    }
120:                }
121:
122:                return list;
123:            }
124:
125:            public static ActionListener add(ActionListener a, ActionListener b) {
126:                return (ActionListener) addInternal(a, b);
127:            }
128:
129:            public static ComponentListener add(ComponentListener a,
130:                    ComponentListener b) {
131:                return (ComponentListener) addInternal(a, b);
132:            }
133:
134:            public static ContainerListener add(ContainerListener a,
135:                    ContainerListener b) {
136:                return (ContainerListener) addInternal(a, b);
137:            }
138:
139:            public static WindowStateListener add(WindowStateListener a,
140:                    WindowStateListener b) {
141:                return (WindowStateListener) addInternal(a, b);
142:            }
143:
144:            public static FocusListener add(FocusListener a, FocusListener b) {
145:                return (FocusListener) addInternal(a, b);
146:            }
147:
148:            public static WindowListener add(WindowListener a, WindowListener b) {
149:                return (WindowListener) addInternal(a, b);
150:            }
151:
152:            public static HierarchyBoundsListener add(
153:                    HierarchyBoundsListener a, HierarchyBoundsListener b) {
154:                return (HierarchyBoundsListener) addInternal(a, b);
155:            }
156:
157:            public static WindowFocusListener add(WindowFocusListener a,
158:                    WindowFocusListener b) {
159:                return (WindowFocusListener) addInternal(a, b);
160:            }
161:
162:            public static HierarchyListener add(HierarchyListener a,
163:                    HierarchyListener b) {
164:                return (HierarchyListener) addInternal(a, b);
165:            }
166:
167:            public static TextListener add(TextListener a, TextListener b) {
168:                return (TextListener) addInternal(a, b);
169:            }
170:
171:            public static InputMethodListener add(InputMethodListener a,
172:                    InputMethodListener b) {
173:                return (InputMethodListener) addInternal(a, b);
174:            }
175:
176:            public static MouseWheelListener add(MouseWheelListener a,
177:                    MouseWheelListener b) {
178:                return (MouseWheelListener) addInternal(a, b);
179:            }
180:
181:            public static ItemListener add(ItemListener a, ItemListener b) {
182:                return (ItemListener) addInternal(a, b);
183:            }
184:
185:            public static MouseMotionListener add(MouseMotionListener a,
186:                    MouseMotionListener b) {
187:                return (MouseMotionListener) addInternal(a, b);
188:            }
189:
190:            public static KeyListener add(KeyListener a, KeyListener b) {
191:                return (KeyListener) addInternal(a, b);
192:            }
193:
194:            public static MouseListener add(MouseListener a, MouseListener b) {
195:                return (MouseListener) addInternal(a, b);
196:            }
197:
198:            public static AdjustmentListener add(AdjustmentListener a,
199:                    AdjustmentListener b) {
200:                return (AdjustmentListener) addInternal(a, b);
201:            }
202:
203:            public static MouseListener remove(MouseListener l,
204:                    MouseListener oldl) {
205:                return (MouseListener) removeInternal(l, oldl);
206:            }
207:
208:            public static ItemListener remove(ItemListener l, ItemListener oldl) {
209:                return (ItemListener) removeInternal(l, oldl);
210:            }
211:
212:            public static MouseMotionListener remove(MouseMotionListener l,
213:                    MouseMotionListener oldl) {
214:                return (MouseMotionListener) removeInternal(l, oldl);
215:            }
216:
217:            public static InputMethodListener remove(InputMethodListener l,
218:                    InputMethodListener oldl) {
219:                return (InputMethodListener) removeInternal(l, oldl);
220:            }
221:
222:            public static MouseWheelListener remove(MouseWheelListener l,
223:                    MouseWheelListener oldl) {
224:                return (MouseWheelListener) removeInternal(l, oldl);
225:            }
226:
227:            public static HierarchyListener remove(HierarchyListener l,
228:                    HierarchyListener oldl) {
229:                return (HierarchyListener) removeInternal(l, oldl);
230:            }
231:
232:            public static TextListener remove(TextListener l, TextListener oldl) {
233:                return (TextListener) removeInternal(l, oldl);
234:            }
235:
236:            public static HierarchyBoundsListener remove(
237:                    HierarchyBoundsListener l, HierarchyBoundsListener oldl) {
238:                return (HierarchyBoundsListener) removeInternal(l, oldl);
239:            }
240:
241:            public static WindowFocusListener remove(WindowFocusListener l,
242:                    WindowFocusListener oldl) {
243:                return (WindowFocusListener) removeInternal(l, oldl);
244:            }
245:
246:            public static FocusListener remove(FocusListener l,
247:                    FocusListener oldl) {
248:                return (FocusListener) removeInternal(l, oldl);
249:            }
250:
251:            public static WindowListener remove(WindowListener l,
252:                    WindowListener oldl) {
253:                return (WindowListener) removeInternal(l, oldl);
254:            }
255:
256:            public static ContainerListener remove(ContainerListener l,
257:                    ContainerListener oldl) {
258:                return (ContainerListener) removeInternal(l, oldl);
259:            }
260:
261:            public static WindowStateListener remove(WindowStateListener l,
262:                    WindowStateListener oldl) {
263:                return (WindowStateListener) removeInternal(l, oldl);
264:            }
265:
266:            public static ComponentListener remove(ComponentListener l,
267:                    ComponentListener oldl) {
268:                return (ComponentListener) removeInternal(l, oldl);
269:            }
270:
271:            public static ActionListener remove(ActionListener l,
272:                    ActionListener oldl) {
273:                return (ActionListener) removeInternal(l, oldl);
274:            }
275:
276:            public static AdjustmentListener remove(AdjustmentListener l,
277:                    AdjustmentListener oldl) {
278:                return (AdjustmentListener) removeInternal(l, oldl);
279:            }
280:
281:            public static KeyListener remove(KeyListener l, KeyListener oldl) {
282:                return (KeyListener) removeInternal(l, oldl);
283:            }
284:
285:            protected AWTEventMulticaster(EventListener a, EventListener b) {
286:                // awt.74=Input parameters a and b should not be null
287:                assert (a != null) && (b != null) : Messages
288:                        .getString("awt.74"); //$NON-NLS-1$
289:
290:                this .a = a;
291:                this .b = b;
292:            }
293:
294:            protected EventListener remove(EventListener oldl) {
295:                if (b == oldl) {
296:                    return a;
297:                } else if (a == oldl) {
298:                    return b;
299:                } else {
300:                    return this ;
301:                }
302:            }
303:
304:            protected void saveInternal(ObjectOutputStream s, String k)
305:                    throws IOException {
306:                s.writeChars(k);
307:                s.writeObject(a);
308:                s.writeObject(b);
309:            }
310:
311:            public void actionPerformed(ActionEvent e) {
312:                if ((a != null) && (a instanceof  ActionListener)) {
313:                    ((ActionListener) a).actionPerformed(e);
314:                }
315:                if ((b != null) && (b instanceof  ActionListener)) {
316:                    ((ActionListener) b).actionPerformed(e);
317:                }
318:            }
319:
320:            public void adjustmentValueChanged(AdjustmentEvent e) {
321:                if ((a != null) && (a instanceof  AdjustmentListener)) {
322:                    ((AdjustmentListener) a).adjustmentValueChanged(e);
323:                }
324:                if ((b != null) && (b instanceof  AdjustmentListener)) {
325:                    ((AdjustmentListener) b).adjustmentValueChanged(e);
326:                }
327:            }
328:
329:            public void ancestorMoved(HierarchyEvent e) {
330:                if ((a != null) && (a instanceof  HierarchyBoundsListener)) {
331:                    ((HierarchyBoundsListener) a).ancestorMoved(e);
332:                }
333:                if ((b != null) && (b instanceof  HierarchyBoundsListener)) {
334:                    ((HierarchyBoundsListener) b).ancestorMoved(e);
335:                }
336:            }
337:
338:            public void ancestorResized(HierarchyEvent e) {
339:                if ((a != null) && (a instanceof  HierarchyBoundsListener)) {
340:                    ((HierarchyBoundsListener) a).ancestorResized(e);
341:                }
342:                if ((b != null) && (b instanceof  HierarchyBoundsListener)) {
343:                    ((HierarchyBoundsListener) b).ancestorResized(e);
344:                }
345:            }
346:
347:            public void caretPositionChanged(InputMethodEvent e) {
348:                if ((a != null) && (a instanceof  InputMethodListener)) {
349:                    ((InputMethodListener) a).caretPositionChanged(e);
350:                }
351:                if ((b != null) && (b instanceof  InputMethodListener)) {
352:                    ((InputMethodListener) b).caretPositionChanged(e);
353:                }
354:            }
355:
356:            public void componentAdded(ContainerEvent e) {
357:                if ((a != null) && (a instanceof  ContainerListener)) {
358:                    ((ContainerListener) a).componentAdded(e);
359:                }
360:                if ((b != null) && (b instanceof  ContainerListener)) {
361:                    ((ContainerListener) b).componentAdded(e);
362:                }
363:            }
364:
365:            public void componentHidden(ComponentEvent e) {
366:                if ((a != null) && (a instanceof  ComponentListener)) {
367:                    ((ComponentListener) a).componentHidden(e);
368:                }
369:                if ((b != null) && (b instanceof  ComponentListener)) {
370:                    ((ComponentListener) b).componentHidden(e);
371:                }
372:            }
373:
374:            public void componentMoved(ComponentEvent e) {
375:                if ((a != null) && (a instanceof  ComponentListener)) {
376:                    ((ComponentListener) a).componentMoved(e);
377:                }
378:                if ((b != null) && (b instanceof  ComponentListener)) {
379:                    ((ComponentListener) b).componentMoved(e);
380:                }
381:            }
382:
383:            public void componentRemoved(ContainerEvent e) {
384:                if ((a != null) && (a instanceof  ContainerListener)) {
385:                    ((ContainerListener) a).componentRemoved(e);
386:                }
387:                if ((b != null) && (b instanceof  ContainerListener)) {
388:                    ((ContainerListener) b).componentRemoved(e);
389:                }
390:            }
391:
392:            public void componentResized(ComponentEvent e) {
393:                if ((a != null) && (a instanceof  ComponentListener)) {
394:                    ((ComponentListener) a).componentResized(e);
395:                }
396:                if ((b != null) && (b instanceof  ComponentListener)) {
397:                    ((ComponentListener) b).componentResized(e);
398:                }
399:            }
400:
401:            public void componentShown(ComponentEvent e) {
402:                if ((a != null) && (a instanceof  ComponentListener)) {
403:                    ((ComponentListener) a).componentShown(e);
404:                }
405:                if ((b != null) && (b instanceof  ComponentListener)) {
406:                    ((ComponentListener) b).componentShown(e);
407:                }
408:            }
409:
410:            public void focusGained(FocusEvent e) {
411:                if ((a != null) && (a instanceof  FocusListener)) {
412:                    ((FocusListener) a).focusGained(e);
413:                }
414:                if ((b != null) && (b instanceof  FocusListener)) {
415:                    ((FocusListener) b).focusGained(e);
416:                }
417:            }
418:
419:            public void focusLost(FocusEvent e) {
420:                if ((a != null) && (a instanceof  FocusListener)) {
421:                    ((FocusListener) a).focusLost(e);
422:                }
423:                if ((b != null) && (b instanceof  FocusListener)) {
424:                    ((FocusListener) b).focusLost(e);
425:                }
426:            }
427:
428:            public void hierarchyChanged(HierarchyEvent e) {
429:                if ((a != null) && (a instanceof  HierarchyListener)) {
430:                    ((HierarchyListener) a).hierarchyChanged(e);
431:                }
432:                if ((b != null) && (b instanceof  HierarchyListener)) {
433:                    ((HierarchyListener) b).hierarchyChanged(e);
434:                }
435:            }
436:
437:            public void inputMethodTextChanged(InputMethodEvent e) {
438:                if ((a != null) && (a instanceof  InputMethodListener)) {
439:                    ((InputMethodListener) a).inputMethodTextChanged(e);
440:                }
441:                if ((b != null) && (b instanceof  InputMethodListener)) {
442:                    ((InputMethodListener) b).inputMethodTextChanged(e);
443:                }
444:            }
445:
446:            public void itemStateChanged(ItemEvent e) {
447:                if ((a != null) && (a instanceof  ItemListener)) {
448:                    ((ItemListener) a).itemStateChanged(e);
449:                }
450:                if ((b != null) && (b instanceof  ItemListener)) {
451:                    ((ItemListener) b).itemStateChanged(e);
452:                }
453:            }
454:
455:            public void keyPressed(KeyEvent e) {
456:                if ((a != null) && (a instanceof  KeyListener)) {
457:                    ((KeyListener) a).keyPressed(e);
458:                }
459:                if ((b != null) && (b instanceof  KeyListener)) {
460:                    ((KeyListener) b).keyPressed(e);
461:                }
462:            }
463:
464:            public void keyReleased(KeyEvent e) {
465:                if ((a != null) && (a instanceof  KeyListener)) {
466:                    ((KeyListener) a).keyReleased(e);
467:                }
468:                if ((b != null) && (b instanceof  KeyListener)) {
469:                    ((KeyListener) b).keyReleased(e);
470:                }
471:            }
472:
473:            public void keyTyped(KeyEvent e) {
474:                if ((a != null) && (a instanceof  KeyListener)) {
475:                    ((KeyListener) a).keyTyped(e);
476:                }
477:                if ((b != null) && (b instanceof  KeyListener)) {
478:                    ((KeyListener) b).keyTyped(e);
479:                }
480:            }
481:
482:            public void mouseClicked(MouseEvent e) {
483:                if ((a != null) && (a instanceof  MouseListener)) {
484:                    ((MouseListener) a).mouseClicked(e);
485:                }
486:                if ((b != null) && (b instanceof  MouseListener)) {
487:                    ((MouseListener) b).mouseClicked(e);
488:                }
489:            }
490:
491:            public void mouseDragged(MouseEvent e) {
492:                if ((a != null) && (a instanceof  MouseMotionListener)) {
493:                    ((MouseMotionListener) a).mouseDragged(e);
494:                }
495:                if ((b != null) && (b instanceof  MouseMotionListener)) {
496:                    ((MouseMotionListener) b).mouseDragged(e);
497:                }
498:            }
499:
500:            public void mouseEntered(MouseEvent e) {
501:                if ((a != null) && (a instanceof  MouseListener)) {
502:                    ((MouseListener) a).mouseEntered(e);
503:                }
504:                if ((b != null) && (b instanceof  MouseListener)) {
505:                    ((MouseListener) b).mouseEntered(e);
506:                }
507:            }
508:
509:            public void mouseExited(MouseEvent e) {
510:                if ((a != null) && (a instanceof  MouseListener)) {
511:                    ((MouseListener) a).mouseExited(e);
512:                }
513:                if ((b != null) && (b instanceof  MouseListener)) {
514:                    ((MouseListener) b).mouseExited(e);
515:                }
516:            }
517:
518:            public void mouseMoved(MouseEvent e) {
519:                if ((a != null) && (a instanceof  MouseMotionListener)) {
520:                    ((MouseMotionListener) a).mouseMoved(e);
521:                }
522:                if ((b != null) && (b instanceof  MouseMotionListener)) {
523:                    ((MouseMotionListener) b).mouseMoved(e);
524:                }
525:            }
526:
527:            public void mousePressed(MouseEvent e) {
528:                if ((a != null) && (a instanceof  MouseListener)) {
529:                    ((MouseListener) a).mousePressed(e);
530:                }
531:                if ((b != null) && (b instanceof  MouseListener)) {
532:                    ((MouseListener) b).mousePressed(e);
533:                }
534:            }
535:
536:            public void mouseReleased(MouseEvent e) {
537:                if ((a != null) && (a instanceof  MouseListener)) {
538:                    ((MouseListener) a).mouseReleased(e);
539:                }
540:                if ((b != null) && (b instanceof  MouseListener)) {
541:                    ((MouseListener) b).mouseReleased(e);
542:                }
543:            }
544:
545:            public void mouseWheelMoved(MouseWheelEvent e) {
546:                if ((a != null) && (a instanceof  MouseWheelListener)) {
547:                    ((MouseWheelListener) a).mouseWheelMoved(e);
548:                }
549:                if ((b != null) && (b instanceof  MouseWheelListener)) {
550:                    ((MouseWheelListener) b).mouseWheelMoved(e);
551:                }
552:            }
553:
554:            public void textValueChanged(TextEvent e) {
555:                if ((a != null) && (a instanceof  TextListener)) {
556:                    ((TextListener) a).textValueChanged(e);
557:                }
558:                if ((b != null) && (b instanceof  TextListener)) {
559:                    ((TextListener) b).textValueChanged(e);
560:                }
561:            }
562:
563:            public void windowActivated(WindowEvent e) {
564:                if ((a != null) && (a instanceof  WindowListener)) {
565:                    ((WindowListener) a).windowActivated(e);
566:                }
567:                if ((b != null) && (b instanceof  WindowListener)) {
568:                    ((WindowListener) b).windowActivated(e);
569:                }
570:            }
571:
572:            public void windowClosed(WindowEvent e) {
573:                if ((a != null) && (a instanceof  WindowListener)) {
574:                    ((WindowListener) a).windowClosed(e);
575:                }
576:                if ((b != null) && (b instanceof  WindowListener)) {
577:                    ((WindowListener) b).windowClosed(e);
578:                }
579:            }
580:
581:            public void windowClosing(WindowEvent e) {
582:                if ((a != null) && (a instanceof  WindowListener)) {
583:                    ((WindowListener) a).windowClosing(e);
584:                }
585:                if ((b != null) && (b instanceof  WindowListener)) {
586:                    ((WindowListener) b).windowClosing(e);
587:                }
588:            }
589:
590:            public void windowDeactivated(WindowEvent e) {
591:                if ((a != null) && (a instanceof  WindowListener)) {
592:                    ((WindowListener) a).windowDeactivated(e);
593:                }
594:                if ((b != null) && (b instanceof  WindowListener)) {
595:                    ((WindowListener) b).windowDeactivated(e);
596:                }
597:            }
598:
599:            public void windowDeiconified(WindowEvent e) {
600:                if ((a != null) && (a instanceof  WindowListener)) {
601:                    ((WindowListener) a).windowDeiconified(e);
602:                }
603:                if ((b != null) && (b instanceof  WindowListener)) {
604:                    ((WindowListener) b).windowDeiconified(e);
605:                }
606:            }
607:
608:            public void windowGainedFocus(WindowEvent e) {
609:                if ((a != null) && (a instanceof  WindowFocusListener)) {
610:                    ((WindowFocusListener) a).windowGainedFocus(e);
611:                }
612:                if ((b != null) && (b instanceof  WindowFocusListener)) {
613:                    ((WindowFocusListener) b).windowGainedFocus(e);
614:                }
615:            }
616:
617:            public void windowIconified(WindowEvent e) {
618:                if ((a != null) && (a instanceof  WindowListener)) {
619:                    ((WindowListener) a).windowIconified(e);
620:                }
621:                if ((b != null) && (b instanceof  WindowListener)) {
622:                    ((WindowListener) b).windowIconified(e);
623:                }
624:            }
625:
626:            public void windowLostFocus(WindowEvent e) {
627:                if ((a != null) && (a instanceof  WindowFocusListener)) {
628:                    ((WindowFocusListener) a).windowLostFocus(e);
629:                }
630:                if ((b != null) && (b instanceof  WindowFocusListener)) {
631:                    ((WindowFocusListener) b).windowLostFocus(e);
632:                }
633:            }
634:
635:            public void windowOpened(WindowEvent e) {
636:                if ((a != null) && (a instanceof  WindowListener)) {
637:                    ((WindowListener) a).windowOpened(e);
638:                }
639:                if ((b != null) && (b instanceof  WindowListener)) {
640:                    ((WindowListener) b).windowOpened(e);
641:                }
642:            }
643:
644:            public void windowStateChanged(WindowEvent e) {
645:                if ((a != null) && (a instanceof  WindowStateListener)) {
646:                    ((WindowStateListener) a).windowStateChanged(e);
647:                }
648:                if ((b != null) && (b instanceof  WindowStateListener)) {
649:                    ((WindowStateListener) b).windowStateChanged(e);
650:                }
651:            }
652:        }
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