1 /*
2 * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package sun.awt.windows;
26
27 import java.awt.*;
28 import java.awt.event.*;
29 import java.awt.image.*;
30 import java.awt.peer.*;
31
32 import java.beans.*;
33
34 import java.util.*;
35 import java.util.List;
36 import sun.util.logging.PlatformLogger;
37
38 import sun.awt.*;
39
40 import sun.java2d.pipe.Region;
41
42 public class WWindowPeer extends WPanelPeer implements WindowPeer,
43 DisplayChangedListener
44 {
45
46 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.windows.WWindowPeer");
47 private static final PlatformLogger screenLog = PlatformLogger.getLogger("sun.awt.windows.screen.WWindowPeer");
48
49 // we can't use WDialogPeer as blocker may be an instance of WPrintDialogPeer that
50 // extends WWindowPeer, not WDialogPeer
51 private WWindowPeer modalBlocker = null;
52
53 private boolean isOpaque;
54
55 private TranslucentWindowPainter painter;
56
57 /*
58 * A key used for storing a list of active windows in AppContext. The value
59 * is a list of windows, sorted by the time of activation: later a window is
60 * activated, greater its index is in the list.
61 */
62 private static final StringBuffer ACTIVE_WINDOWS_KEY =
63 new StringBuffer("active_windows_list");
64
65 /*
66 * Listener for 'activeWindow' KFM property changes. It is added to each
67 * AppContext KFM. See ActiveWindowListener inner class below.
68 */
69 private static PropertyChangeListener activeWindowListener =
70 new ActiveWindowListener();
71
72 /*
73 * The object is a listener for the AppContext.GUI_DISPOSED property.
74 */
75 private static final PropertyChangeListener guiDisposedListener =
76 new GuiDisposedListener();
77
78 /*
79 * Called (on the Toolkit thread) before the appropriate
80 * WindowStateEvent is posted to the EventQueue.
81 */
82 private WindowListener windowListener;
83
84 /**
85 * Initialize JNI field IDs
86 */
87 private static native void initIDs();
88 static {
89 initIDs();
90 }
91
92 // WComponentPeer overrides
93 @Override
94 @SuppressWarnings("unchecked")
95 protected void disposeImpl() {
96 AppContext appContext = SunToolkit.targetToAppContext(target);
97 synchronized (appContext) {
98 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY);
99 if (l != null) {
100 l.remove(this);
101 }
102 }
103
104 // Remove ourself from the Map of DisplayChangeListeners
105 GraphicsConfiguration gc = getGraphicsConfiguration();
106 ((Win32GraphicsDevice)gc.getDevice()).removeDisplayChangedListener(this);
107
108 synchronized (getStateLock()) {
109 TranslucentWindowPainter currentPainter = painter;
110 if (currentPainter != null) {
111 currentPainter.flush();
112 // don't set the current one to null here; reduces the chances of
113 // MT issues (like NPEs)
114 }
115 }
116
117 super.disposeImpl();
118 }
119
120 // WindowPeer implementation
121
122 @Override
123 public void toFront() {
124 updateFocusableWindowState();
125 _toFront();
126 }
127 private native void _toFront();
128
129 @Override
130 public native void toBack();
131
132 private native void setAlwaysOnTopNative(boolean value);
133
134 public void setAlwaysOnTop(boolean value) {
135 if ((value && ((Window)target).isVisible()) || !value) {
136 setAlwaysOnTopNative(value);
137 }
138 }
139
140 @Override
141 public void updateAlwaysOnTopState() {
142 setAlwaysOnTop(((Window)target).isAlwaysOnTop());
143 }
144
145 @Override
146 public void updateFocusableWindowState() {
147 setFocusableWindow(((Window)target).isFocusableWindow());
148 }
149 native void setFocusableWindow(boolean value);
150
151 // FramePeer & DialogPeer partial shared implementation
152
153 public void setTitle(String title) {
154 // allow a null title to pass as an empty string.
155 if (title == null) {
156 title = "";
157 }
158 _setTitle(title);
159 }
160 private native void _setTitle(String title);
161
162 public void setResizable(boolean resizable) {
163 _setResizable(resizable);
164 }
165
166 private native void _setResizable(boolean resizable);
167
168 // Toolkit & peer internals
169
170 WWindowPeer(Window target) {
171 super(target);
172 }
173
174 @Override
175 void initialize() {
176 super.initialize();
177
178 updateInsets(insets_);
179
180 if (!((Window) target).isFontSet()) {
181 ((Window) target).setFont(defaultFont);
182 setFont(defaultFont);
183 }
184 if (!((Window) target).isForegroundSet()) {
185 ((Window) target).setForeground(SystemColor.windowText);
186 }
187 if (!((Window) target).isBackgroundSet()) {
188 ((Window) target).setBackground(SystemColor.window);
189 }
190
191 // Express our interest in display changes
192 GraphicsConfiguration gc = getGraphicsConfiguration();
193 ((Win32GraphicsDevice)gc.getDevice()).addDisplayChangedListener(this);
194
195 initActiveWindowsTracking((Window)target);
196
197 updateIconImages();
198
199 Shape shape = ((Window)target).getShape();
200 if (shape != null) {
201 applyShape(Region.getInstance(shape, null));
202 }
203
204 float opacity = ((Window)target).getOpacity();
205 if (opacity < 1.0f) {
206 setOpacity(opacity);
207 }
208
209 synchronized (getStateLock()) {
210 // default value of a boolean field is 'false', so set isOpaque to
211 // true here explicitly
212 this.isOpaque = true;
213 setOpaque(((Window)target).isOpaque());
214 }
215 }
216
217 native void createAwtWindow(WComponentPeer parent);
218
219 private volatile Window.Type windowType = Window.Type.NORMAL;
220
221 // This method must be called for Window, Dialog, and Frame before creating
222 // the hwnd
223 void preCreate(WComponentPeer parent) {
224 windowType = ((Window)target).getType();
225 }
226
227 @Override
228 void create(WComponentPeer parent) {
229 preCreate(parent);
230 createAwtWindow(parent);
231 }
232
233 @Override
234 final WComponentPeer getNativeParent() {
235 final Container owner = ((Window) target).getOwner();
236 return (WComponentPeer) WToolkit.targetToPeer(owner);
237 }
238
239 // should be overriden in WDialogPeer
240 protected void realShow() {
241 super.show();
242 }
243
244 @Override
245 public void show() {
246 updateFocusableWindowState();
247
248 boolean alwaysOnTop = ((Window)target).isAlwaysOnTop();
249
250 // Fix for 4868278.
251 // If we create a window with a specific GraphicsConfig, and then move it with
252 // setLocation() or setBounds() to another one before its peer has been created,
253 // then calling Window.getGraphicsConfig() returns wrong config. That may lead
254 // to some problems like wrong-placed tooltips. It is caused by calling
255 // super.displayChanged() in WWindowPeer.displayChanged() regardless of whether
256 // GraphicsDevice was really changed, or not. So we need to track it here.
257 updateGC();
258
259 realShow();
260 updateMinimumSize();
261
262 if (((Window)target).isAlwaysOnTopSupported() && alwaysOnTop) {
263 setAlwaysOnTop(alwaysOnTop);
264 }
265
266 synchronized (getStateLock()) {
267 if (!isOpaque) {
268 updateWindow(true);
269 }
270 }
271
272 // See https://javafx-jira.kenai.com/browse/RT-32570
273 WComponentPeer owner = getNativeParent();
274 if (owner != null && owner.isLightweightFramePeer()) {
275 Rectangle b = getBounds();
276 handleExpose(0, 0, b.width, b.height);
277 }
278 }
279
280 // Synchronize the insets members (here & in helper) with actual window
281 // state.
282 native void updateInsets(Insets i);
283
284 static native int getSysMinWidth();
285 static native int getSysMinHeight();
286 static native int getSysIconWidth();
287 static native int getSysIconHeight();
288 static native int getSysSmIconWidth();
289 static native int getSysSmIconHeight();
290 /**windows/classes/sun/awt/windows/
291 * Creates native icon from specified raster data and updates
292 * icon for window and all descendant windows that inherit icon.
293 * Raster data should be passed in the ARGB form.
294 * Note that raster data format was changed to provide support
295 * for XP icons with alpha-channel
296 */
297 native void setIconImagesData(int[] iconRaster, int w, int h,
298 int[] smallIconRaster, int smw, int smh);
299
300 synchronized native void reshapeFrame(int x, int y, int width, int height);
301
302 native Dimension getNativeWindowSize();
303
304 public Dimension getScaledWindowSize() {
305 return getNativeWindowSize();
306 }
307
308 public boolean requestWindowFocus(FocusEvent.Cause cause) {
309 if (!focusAllowedFor()) {
310 return false;
311 }
312 return requestWindowFocus(cause == FocusEvent.Cause.MOUSE_EVENT);
313 }
314 private native boolean requestWindowFocus(boolean isMouseEventCause);
315
316 public boolean focusAllowedFor() {
317 Window window = (Window)this.target;
318 if (!window.isVisible() ||
319 !window.isEnabled() ||
320 !window.isFocusableWindow())
321 {
322 return false;
323 }
324 if (isModalBlocked()) {
325 return false;
326 }
327 return true;
328 }
329
330 @Override
331 void hide() {
332 WindowListener listener = windowListener;
333 if (listener != null) {
334 // We're not getting WINDOW_CLOSING from the native code when hiding
335 // the window programmatically. So, create it and notify the listener.
336 listener.windowClosing(new WindowEvent((Window)target, WindowEvent.WINDOW_CLOSING));
337 }
338 super.hide();
339 }
340
341 // WARNING: it's called on the Toolkit thread!
342 @Override
343 void preprocessPostEvent(AWTEvent event) {
344 if (event instanceof WindowEvent) {
345 WindowListener listener = windowListener;
346 if (listener != null) {
347 switch(event.getID()) {
348 case WindowEvent.WINDOW_CLOSING:
349 listener.windowClosing((WindowEvent)event);
350 break;
351 case WindowEvent.WINDOW_ICONIFIED:
352 listener.windowIconified((WindowEvent)event);
353 break;
354 }
355 }
356 }
357 }
358
359 synchronized void addWindowListener(WindowListener l) {
360 windowListener = AWTEventMulticaster.add(windowListener, l);
361 }
362
363 synchronized void removeWindowListener(WindowListener l) {
364 windowListener = AWTEventMulticaster.remove(windowListener, l);
365 }
366
367 @Override
368 public void updateMinimumSize() {
369 Dimension minimumSize = null;
370 if (((Component)target).isMinimumSizeSet()) {
371 minimumSize = ((Component)target).getMinimumSize();
372 }
373 if (minimumSize != null) {
374 int msw = getSysMinWidth();
375 int msh = getSysMinHeight();
376 int w = (minimumSize.width >= msw) ? minimumSize.width : msw;
377 int h = (minimumSize.height >= msh) ? minimumSize.height : msh;
378 setMinSize(w, h);
379 } else {
380 setMinSize(0, 0);
381 }
382 }
383
384 @Override
385 public void updateIconImages() {
386 java.util.List<Image> imageList = ((Window)target).getIconImages();
387 if (imageList == null || imageList.size() == 0) {
388 setIconImagesData(null, 0, 0, null, 0, 0);
389 } else {
390 int w = getSysIconWidth();
391 int h = getSysIconHeight();
392 int smw = getSysSmIconWidth();
393 int smh = getSysSmIconHeight();
394 DataBufferInt iconData = SunToolkit.getScaledIconData(imageList,
395 w, h);
396 DataBufferInt iconSmData = SunToolkit.getScaledIconData(imageList,
397 smw, smh);
398 if (iconData != null && iconSmData != null) {
399 setIconImagesData(iconData.getData(), w, h,
400 iconSmData.getData(), smw, smh);
401 } else {
402 setIconImagesData(null, 0, 0, null, 0, 0);
403 }
404 }
405 }
406
407 native void setMinSize(int width, int height);
408
409 /*
410 * ---- MODALITY SUPPORT ----
411 */
412
413 /**
414 * Some modality-related code here because WFileDialogPeer, WPrintDialogPeer and
415 * WPageDialogPeer are descendants of WWindowPeer, not WDialogPeer
416 */
417
418 public boolean isModalBlocked() {
419 return modalBlocker != null;
420 }
421
422 @Override
423 public void setModalBlocked(Dialog dialog, boolean blocked) {
424 synchronized (((Component)getTarget()).getTreeLock()) // State lock should always be after awtLock
425 {
426 // use WWindowPeer instead of WDialogPeer because of FileDialogs and PrintDialogs
427 WWindowPeer blockerPeer = AWTAccessor.getComponentAccessor()
428 .getPeer(dialog);
429 if (blocked)
430 {
431 modalBlocker = blockerPeer;
432 // handle native dialogs separately, as they may have not
433 // got HWND yet; modalEnable/modalDisable is called from
434 // their setHWnd() methods
435 if (blockerPeer instanceof WFileDialogPeer) {
436 ((WFileDialogPeer)blockerPeer).blockWindow(this);
437 } else if (blockerPeer instanceof WPrintDialogPeer) {
438 ((WPrintDialogPeer)blockerPeer).blockWindow(this);
439 } else {
440 modalDisable(dialog, blockerPeer.getHWnd());
441 }
442 } else {
443 modalBlocker = null;
444 if (blockerPeer instanceof WFileDialogPeer) {
445 ((WFileDialogPeer)blockerPeer).unblockWindow(this);
446 } else if (blockerPeer instanceof WPrintDialogPeer) {
447 ((WPrintDialogPeer)blockerPeer).unblockWindow(this);
448 } else {
449 modalEnable(dialog);
450 }
451 }
452 }
453 }
454
455 native void modalDisable(Dialog blocker, long blockerHWnd);
456 native void modalEnable(Dialog blocker);
457
458 /*
459 * Returns all the ever active windows from the current AppContext.
460 * The list is sorted by the time of activation, so the latest
461 * active window is always at the end.
462 */
463 @SuppressWarnings("unchecked")
464 public static long[] getActiveWindowHandles(Component target) {
465 AppContext appContext = SunToolkit.targetToAppContext(target);
466 if (appContext == null) return null;
467 synchronized (appContext) {
468 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY);
469 if (l == null) {
470 return null;
471 }
472 long[] result = new long[l.size()];
473 for (int j = 0; j < l.size(); j++) {
474 result[j] = l.get(j).getHWnd();
475 }
476 return result;
477 }
478 }
479
480 /*
481 * ----DISPLAY CHANGE SUPPORT----
482 */
483
484 /*
485 * Called from native code when we have been dragged onto another screen.
486 */
487 void draggedToNewScreen() {
488 SunToolkit.executeOnEventHandlerThread((Component)target,new Runnable()
489 {
490 @Override
491 public void run() {
492 displayChanged();
493 }
494 });
495 }
496
497 public void updateGC() {
498 int scrn = getScreenImOn();
499 if (screenLog.isLoggable(PlatformLogger.Level.FINER)) {
500 log.finer("Screen number: " + scrn);
501 }
502
503 // get current GD
504 Win32GraphicsDevice oldDev = winGraphicsConfig.getDevice();
505
506 Win32GraphicsDevice newDev;
507 GraphicsDevice devs[] = GraphicsEnvironment
508 .getLocalGraphicsEnvironment()
509 .getScreenDevices();
510 // Occasionally during device addition/removal getScreenImOn can return
511 // a non-existing screen number. Use the default device in this case.
512 if (scrn >= devs.length) {
513 newDev = (Win32GraphicsDevice)GraphicsEnvironment
514 .getLocalGraphicsEnvironment().getDefaultScreenDevice();
515 } else {
516 newDev = (Win32GraphicsDevice)devs[scrn];
517 }
518
519 // Set winGraphicsConfig to the default GC for the monitor this Window
520 // is now mostly on.
521 winGraphicsConfig = (Win32GraphicsConfig)newDev
522 .getDefaultConfiguration();
523 if (screenLog.isLoggable(PlatformLogger.Level.FINE)) {
524 if (winGraphicsConfig == null) {
525 screenLog.fine("Assertion (winGraphicsConfig != null) failed");
526 }
527 }
528
529 // if on a different display, take off old GD and put on new GD
530 if (oldDev != newDev) {
531 oldDev.removeDisplayChangedListener(this);
532 newDev.addDisplayChangedListener(this);
533 }
534
535 AWTAccessor.getComponentAccessor().
536 setGraphicsConfiguration((Component)target, winGraphicsConfig);
537 }
538
539 /**
540 * From the DisplayChangedListener interface.
541 *
542 * This method handles a display change - either when the display settings
543 * are changed, or when the window has been dragged onto a different
544 * display.
545 * Called after a change in the display mode. This event
546 * triggers replacing the surfaceData object (since that object
547 * reflects the current display depth information, which has
548 * just changed).
549 */
550 @Override
551 public void displayChanged() {
552 updateGC();
553 }
554
555 /**
556 * Part of the DisplayChangedListener interface: components
557 * do not need to react to this event
558 */
559 @Override
560 public void paletteChanged() {
561 }
562
563 private native int getScreenImOn();
564
565 // Used in Win32GraphicsDevice.
566 public final native void setFullScreenExclusiveModeState(boolean state);
567
568 /*
569 * ----END DISPLAY CHANGE SUPPORT----
570 */
571
572 public void grab() {
573 nativeGrab();
574 }
575
576 public void ungrab() {
577 nativeUngrab();
578 }
579 private native void nativeGrab();
580 private native void nativeUngrab();
581
582 private final boolean hasWarningWindow() {
583 return ((Window)target).getWarningString() != null;
584 }
585
586 boolean isTargetUndecorated() {
587 return true;
588 }
589
590 // These are the peer bounds. They get updated at:
591 // 1. the WWindowPeer.setBounds() method.
592 // 2. the native code (on WM_SIZE/WM_MOVE)
593 private volatile int sysX = 0;
594 private volatile int sysY = 0;
595 private volatile int sysW = 0;
596 private volatile int sysH = 0;
597
598 @Override
599 public native void repositionSecurityWarning();
600
601 @Override
602 public void setBounds(int x, int y, int width, int height, int op) {
603 sysX = x;
604 sysY = y;
605 sysW = width;
606 sysH = height;
607
608 super.setBounds(x, y, width, height, op);
609 }
610
611 @Override
612 public void print(Graphics g) {
613 // We assume we print the whole frame,
614 // so we expect no clip was set previously
615 Shape shape = AWTAccessor.getWindowAccessor().getShape((Window)target);
616 if (shape != null) {
617 g.setClip(shape);
618 }
619 super.print(g);
620 }
621
622 private void replaceSurfaceDataRecursively(Component c) {
623 if (c instanceof Container) {
624 for (Component child : ((Container)c).getComponents()) {
625 replaceSurfaceDataRecursively(child);
626 }
627 }
628 final Object cp = AWTAccessor.getComponentAccessor().getPeer(c);
629 if (cp instanceof WComponentPeer) {
630 ((WComponentPeer)cp).replaceSurfaceDataLater();
631 }
632 }
633
634 public final Graphics getTranslucentGraphics() {
635 synchronized (getStateLock()) {
636 return isOpaque ? null : painter.getBackBuffer(false).getGraphics();
637 }
638 }
639
640 @Override
641 public void setBackground(Color c) {
642 super.setBackground(c);
643 synchronized (getStateLock()) {
644 if (!isOpaque && ((Window)target).isVisible()) {
645 updateWindow(true);
646 }
647 }
648 }
649
650 private native void setOpacity(int iOpacity);
651 private float opacity = 1.0f;
652
653 @Override
654 public void setOpacity(float opacity) {
655 if (!((SunToolkit)((Window)target).getToolkit()).
656 isWindowOpacitySupported())
657 {
658 return;
659 }
660
661 if (opacity < 0.0f || opacity > 1.0f) {
662 throw new IllegalArgumentException(
663 "The value of opacity should be in the range [0.0f .. 1.0f].");
664 }
665
666 if (((this.opacity == 1.0f && opacity < 1.0f) ||
667 (this.opacity < 1.0f && opacity == 1.0f)) &&
668 !Win32GraphicsEnvironment.isVistaOS())
669 {
670 // non-Vista OS: only replace the surface data if opacity status
671 // changed (see WComponentPeer.isAccelCapable() for more)
672 replaceSurfaceDataRecursively((Component)getTarget());
673 }
674
675 this.opacity = opacity;
676
677 final int maxOpacity = 0xff;
678 int iOpacity = (int)(opacity * maxOpacity);
679 if (iOpacity < 0) {
680 iOpacity = 0;
681 }
682 if (iOpacity > maxOpacity) {
683 iOpacity = maxOpacity;
684 }
685
686 setOpacity(iOpacity);
687
688 synchronized (getStateLock()) {
689 if (!isOpaque && ((Window)target).isVisible()) {
690 updateWindow(true);
691 }
692 }
693 }
694
695 private native void setOpaqueImpl(boolean isOpaque);
696
697 @Override
698 public void setOpaque(boolean isOpaque) {
699 synchronized (getStateLock()) {
700 if (this.isOpaque == isOpaque) {
701 return;
702 }
703 }
704
705 Window target = (Window)getTarget();
706
707 if (!isOpaque) {
708 SunToolkit sunToolkit = (SunToolkit)target.getToolkit();
709 if (!sunToolkit.isWindowTranslucencySupported() ||
710 !sunToolkit.isTranslucencyCapable(target.getGraphicsConfiguration()))
711 {
712 return;
713 }
714 }
715
716 boolean isVistaOS = Win32GraphicsEnvironment.isVistaOS();
717
718 if (this.isOpaque != isOpaque && !isVistaOS) {
719 // non-Vista OS: only replace the surface data if the opacity
720 // status changed (see WComponentPeer.isAccelCapable() for more)
721 replaceSurfaceDataRecursively(target);
722 }
723
724 synchronized (getStateLock()) {
725 this.isOpaque = isOpaque;
726 setOpaqueImpl(isOpaque);
727 if (isOpaque) {
728 TranslucentWindowPainter currentPainter = painter;
729 if (currentPainter != null) {
730 currentPainter.flush();
731 painter = null;
732 }
733 } else {
734 painter = TranslucentWindowPainter.createInstance(this);
735 }
736 }
737
738 if (isVistaOS) {
739 // On Vista: setting the window non-opaque makes the window look
740 // rectangular, though still catching the mouse clicks within
741 // its shape only. To restore the correct visual appearance
742 // of the window (i.e. w/ the correct shape) we have to reset
743 // the shape.
744 Shape shape = target.getShape();
745 if (shape != null) {
746 target.setShape(shape);
747 }
748 }
749
750 if (target.isVisible()) {
751 updateWindow(true);
752 }
753 }
754
755 native void updateWindowImpl(int[] data, int width, int height);
756
757 @Override
758 public void updateWindow() {
759 updateWindow(false);
760 }
761
762 private void updateWindow(boolean repaint) {
763 Window w = (Window)target;
764 synchronized (getStateLock()) {
765 if (isOpaque || !w.isVisible() ||
766 (w.getWidth() <= 0) || (w.getHeight() <= 0))
767 {
768 return;
769 }
770 TranslucentWindowPainter currentPainter = painter;
771 if (currentPainter != null) {
772 currentPainter.updateWindow(repaint);
773 } else if (log.isLoggable(PlatformLogger.Level.FINER)) {
774 log.finer("Translucent window painter is null in updateWindow");
775 }
776 }
777 }
778
779 /*
780 * The method maps the list of the active windows to the window's AppContext,
781 * then the method registers ActiveWindowListener, GuiDisposedListener listeners;
782 * it executes the initilialization only once per AppContext.
783 */
784 @SuppressWarnings("unchecked")
785 private static void initActiveWindowsTracking(Window w) {
786 AppContext appContext = AppContext.getAppContext();
787 synchronized (appContext) {
788 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY);
789 if (l == null) {
790 l = new LinkedList<WWindowPeer>();
791 appContext.put(ACTIVE_WINDOWS_KEY, l);
792 appContext.addPropertyChangeListener(AppContext.GUI_DISPOSED, guiDisposedListener);
793
794 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
795 kfm.addPropertyChangeListener("activeWindow", activeWindowListener);
796 }
797 }
798 }
799
800 /*
801 * The GuiDisposedListener class listens for the AppContext.GUI_DISPOSED property,
802 * it removes the list of the active windows from the disposed AppContext and
803 * unregisters ActiveWindowListener listener.
804 */
805 private static class GuiDisposedListener implements PropertyChangeListener {
806 @Override
807 public void propertyChange(PropertyChangeEvent e) {
808 boolean isDisposed = (Boolean)e.getNewValue();
809 if (isDisposed != true) {
810 if (log.isLoggable(PlatformLogger.Level.FINE)) {
811 log.fine(" Assertion (newValue != true) failed for AppContext.GUI_DISPOSED ");
812 }
813 }
814 AppContext appContext = AppContext.getAppContext();
815 synchronized (appContext) {
816 appContext.remove(ACTIVE_WINDOWS_KEY);
817 appContext.removePropertyChangeListener(AppContext.GUI_DISPOSED, this);
818
819 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
820 kfm.removePropertyChangeListener("activeWindow", activeWindowListener);
821 }
822 }
823 }
824
825 /*
826 * Static inner class, listens for 'activeWindow' KFM property changes and
827 * updates the list of active windows per AppContext, so the latest active
828 * window is always at the end of the list. The list is stored in AppContext.
829 */
830 @SuppressWarnings("unchecked")
831 private static class ActiveWindowListener implements PropertyChangeListener {
832 @Override
833 public void propertyChange(PropertyChangeEvent e) {
834 Window w = (Window)e.getNewValue();
835 if (w == null) {
836 return;
837 }
838 AppContext appContext = SunToolkit.targetToAppContext(w);
839 synchronized (appContext) {
840 WWindowPeer wp = AWTAccessor.getComponentAccessor().getPeer(w);
841 // add/move wp to the end of the list
842 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY);
843 if (l != null) {
844 l.remove(wp);
845 l.add(wp);
846 }
847 }
848 }
849 }
850 }