1 /* 2 * Copyright (c) 1996, 2014, 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 final static 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 final static 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 Font f = ((Window)target).getFont(); 181 if (f == null) { 182 f = defaultFont; 183 ((Window)target).setFont(f); 184 setFont(f); 185 } 186 // Express our interest in display changes 187 GraphicsConfiguration gc = getGraphicsConfiguration(); 188 ((Win32GraphicsDevice)gc.getDevice()).addDisplayChangedListener(this); 189 190 initActiveWindowsTracking((Window)target); 191 192 updateIconImages(); 193 194 Shape shape = ((Window)target).getShape(); 195 if (shape != null) { 196 applyShape(Region.getInstance(shape, null)); 197 } 198 199 float opacity = ((Window)target).getOpacity(); 200 if (opacity < 1.0f) { 201 setOpacity(opacity); 202 } 203 204 synchronized (getStateLock()) { 205 // default value of a boolean field is 'false', so set isOpaque to 206 // true here explicitly 207 this.isOpaque = true; 208 setOpaque(((Window)target).isOpaque()); 209 } 210 } 211 212 native void createAwtWindow(WComponentPeer parent); 213 214 private volatile Window.Type windowType = Window.Type.NORMAL; 215 216 // This method must be called for Window, Dialog, and Frame before creating 217 // the hwnd 218 void preCreate(WComponentPeer parent) { 219 windowType = ((Window)target).getType(); 220 } 221 222 @Override 223 void create(WComponentPeer parent) { 224 preCreate(parent); 225 createAwtWindow(parent); 226 } 227 228 @Override 229 final WComponentPeer getNativeParent() { 230 final Container owner = ((Window) target).getOwner(); 231 return (WComponentPeer) WToolkit.targetToPeer(owner); 232 } 233 234 // should be overriden in WDialogPeer 235 protected void realShow() { 236 super.show(); 237 } 238 239 @Override 240 public void show() { 241 updateFocusableWindowState(); 242 243 boolean alwaysOnTop = ((Window)target).isAlwaysOnTop(); 244 245 // Fix for 4868278. 246 // If we create a window with a specific GraphicsConfig, and then move it with 247 // setLocation() or setBounds() to another one before its peer has been created, 248 // then calling Window.getGraphicsConfig() returns wrong config. That may lead 249 // to some problems like wrong-placed tooltips. It is caused by calling 250 // super.displayChanged() in WWindowPeer.displayChanged() regardless of whether 251 // GraphicsDevice was really changed, or not. So we need to track it here. 252 updateGC(); 253 254 realShow(); 255 updateMinimumSize(); 256 257 if (((Window)target).isAlwaysOnTopSupported() && alwaysOnTop) { 258 setAlwaysOnTop(alwaysOnTop); 259 } 260 261 synchronized (getStateLock()) { 262 if (!isOpaque) { 263 updateWindow(true); 264 } 265 } 266 267 // See https://javafx-jira.kenai.com/browse/RT-32570 268 WComponentPeer owner = getNativeParent(); 269 if (owner != null && owner.isLightweightFramePeer()) { 270 Rectangle b = getBounds(); 271 handleExpose(0, 0, b.width, b.height); 272 } 273 } 274 275 // Synchronize the insets members (here & in helper) with actual window 276 // state. 277 native void updateInsets(Insets i); 278 279 static native int getSysMinWidth(); 280 static native int getSysMinHeight(); 281 static native int getSysIconWidth(); 282 static native int getSysIconHeight(); 283 static native int getSysSmIconWidth(); 284 static native int getSysSmIconHeight(); 285 /**windows/classes/sun/awt/windows/ 286 * Creates native icon from specified raster data and updates 287 * icon for window and all descendant windows that inherit icon. 288 * Raster data should be passed in the ARGB form. 289 * Note that raster data format was changed to provide support 290 * for XP icons with alpha-channel 291 */ 292 native void setIconImagesData(int[] iconRaster, int w, int h, 293 int[] smallIconRaster, int smw, int smh); 294 295 synchronized native void reshapeFrame(int x, int y, int width, int height); 296 297 public boolean requestWindowFocus(CausedFocusEvent.Cause cause) { 298 if (!focusAllowedFor()) { 299 return false; 300 } 301 return requestWindowFocus(cause == CausedFocusEvent.Cause.MOUSE_EVENT); 302 } 303 private native boolean requestWindowFocus(boolean isMouseEventCause); 304 305 public boolean focusAllowedFor() { 306 Window window = (Window)this.target; 307 if (!window.isVisible() || 308 !window.isEnabled() || 309 !window.isFocusableWindow()) 310 { 311 return false; 312 } 313 if (isModalBlocked()) { 314 return false; 315 } 316 return true; 317 } 318 319 @Override 320 void hide() { 321 WindowListener listener = windowListener; 322 if (listener != null) { 323 // We're not getting WINDOW_CLOSING from the native code when hiding 324 // the window programmatically. So, create it and notify the listener. 325 listener.windowClosing(new WindowEvent((Window)target, WindowEvent.WINDOW_CLOSING)); 326 } 327 super.hide(); 328 } 329 330 // WARNING: it's called on the Toolkit thread! 331 @Override 332 void preprocessPostEvent(AWTEvent event) { 333 if (event instanceof WindowEvent) { 334 WindowListener listener = windowListener; 335 if (listener != null) { 336 switch(event.getID()) { 337 case WindowEvent.WINDOW_CLOSING: 338 listener.windowClosing((WindowEvent)event); 339 break; 340 case WindowEvent.WINDOW_ICONIFIED: 341 listener.windowIconified((WindowEvent)event); 342 break; 343 } 344 } 345 } 346 } 347 348 synchronized void addWindowListener(WindowListener l) { 349 windowListener = AWTEventMulticaster.add(windowListener, l); 350 } 351 352 synchronized void removeWindowListener(WindowListener l) { 353 windowListener = AWTEventMulticaster.remove(windowListener, l); 354 } 355 356 @Override 357 public void updateMinimumSize() { 358 Dimension minimumSize = null; 359 if (((Component)target).isMinimumSizeSet()) { 360 minimumSize = ((Component)target).getMinimumSize(); 361 } 362 if (minimumSize != null) { 363 int msw = getSysMinWidth(); 364 int msh = getSysMinHeight(); 365 int w = (minimumSize.width >= msw) ? minimumSize.width : msw; 366 int h = (minimumSize.height >= msh) ? minimumSize.height : msh; 367 setMinSize(w, h); 368 } else { 369 setMinSize(0, 0); 370 } 371 } 372 373 @Override 374 public void updateIconImages() { 375 java.util.List<Image> imageList = ((Window)target).getIconImages(); 376 if (imageList == null || imageList.size() == 0) { 377 setIconImagesData(null, 0, 0, null, 0, 0); 378 } else { 379 int w = getSysIconWidth(); 380 int h = getSysIconHeight(); 381 int smw = getSysSmIconWidth(); 382 int smh = getSysSmIconHeight(); 383 DataBufferInt iconData = SunToolkit.getScaledIconData(imageList, 384 w, h); 385 DataBufferInt iconSmData = SunToolkit.getScaledIconData(imageList, 386 smw, smh); 387 if (iconData != null && iconSmData != null) { 388 setIconImagesData(iconData.getData(), w, h, 389 iconSmData.getData(), smw, smh); 390 } else { 391 setIconImagesData(null, 0, 0, null, 0, 0); 392 } 393 } 394 } 395 396 native void setMinSize(int width, int height); 397 398 /* 399 * ---- MODALITY SUPPORT ---- 400 */ 401 402 /** 403 * Some modality-related code here because WFileDialogPeer, WPrintDialogPeer and 404 * WPageDialogPeer are descendants of WWindowPeer, not WDialogPeer 405 */ 406 407 public boolean isModalBlocked() { 408 return modalBlocker != null; 409 } 410 411 @Override 412 @SuppressWarnings("deprecation") 413 public void setModalBlocked(Dialog dialog, boolean blocked) { 414 synchronized (((Component)getTarget()).getTreeLock()) // State lock should always be after awtLock 415 { 416 // use WWindowPeer instead of WDialogPeer because of FileDialogs and PrintDialogs 417 WWindowPeer blockerPeer = (WWindowPeer)dialog.getPeer(); 418 if (blocked) 419 { 420 modalBlocker = blockerPeer; 421 // handle native dialogs separately, as they may have not 422 // got HWND yet; modalEnable/modalDisable is called from 423 // their setHWnd() methods 424 if (blockerPeer instanceof WFileDialogPeer) { 425 ((WFileDialogPeer)blockerPeer).blockWindow(this); 426 } else if (blockerPeer instanceof WPrintDialogPeer) { 427 ((WPrintDialogPeer)blockerPeer).blockWindow(this); 428 } else { 429 modalDisable(dialog, blockerPeer.getHWnd()); 430 } 431 } else { 432 modalBlocker = null; 433 if (blockerPeer instanceof WFileDialogPeer) { 434 ((WFileDialogPeer)blockerPeer).unblockWindow(this); 435 } else if (blockerPeer instanceof WPrintDialogPeer) { 436 ((WPrintDialogPeer)blockerPeer).unblockWindow(this); 437 } else { 438 modalEnable(dialog); 439 } 440 } 441 } 442 } 443 444 native void modalDisable(Dialog blocker, long blockerHWnd); 445 native void modalEnable(Dialog blocker); 446 447 /* 448 * Returns all the ever active windows from the current AppContext. 449 * The list is sorted by the time of activation, so the latest 450 * active window is always at the end. 451 */ 452 @SuppressWarnings("unchecked") 453 public static long[] getActiveWindowHandles(Component target) { 454 AppContext appContext = SunToolkit.targetToAppContext(target); 455 if (appContext == null) return null; 456 synchronized (appContext) { 457 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 458 if (l == null) { 459 return null; 460 } 461 long[] result = new long[l.size()]; 462 for (int j = 0; j < l.size(); j++) { 463 result[j] = l.get(j).getHWnd(); 464 } 465 return result; 466 } 467 } 468 469 /* 470 * ----DISPLAY CHANGE SUPPORT---- 471 */ 472 473 /* 474 * Called from native code when we have been dragged onto another screen. 475 */ 476 void draggedToNewScreen() { 477 SunToolkit.executeOnEventHandlerThread((Component)target,new Runnable() 478 { 479 @Override 480 public void run() { 481 displayChanged(); 482 } 483 }); 484 } 485 486 public void updateGC() { 487 int scrn = getScreenImOn(); 488 if (screenLog.isLoggable(PlatformLogger.Level.FINER)) { 489 log.finer("Screen number: " + scrn); 490 } 491 492 // get current GD 493 Win32GraphicsDevice oldDev = (Win32GraphicsDevice)winGraphicsConfig 494 .getDevice(); 495 496 Win32GraphicsDevice newDev; 497 GraphicsDevice devs[] = GraphicsEnvironment 498 .getLocalGraphicsEnvironment() 499 .getScreenDevices(); 500 // Occasionally during device addition/removal getScreenImOn can return 501 // a non-existing screen number. Use the default device in this case. 502 if (scrn >= devs.length) { 503 newDev = (Win32GraphicsDevice)GraphicsEnvironment 504 .getLocalGraphicsEnvironment().getDefaultScreenDevice(); 505 } else { 506 newDev = (Win32GraphicsDevice)devs[scrn]; 507 } 508 509 // Set winGraphicsConfig to the default GC for the monitor this Window 510 // is now mostly on. 511 winGraphicsConfig = (Win32GraphicsConfig)newDev 512 .getDefaultConfiguration(); 513 if (screenLog.isLoggable(PlatformLogger.Level.FINE)) { 514 if (winGraphicsConfig == null) { 515 screenLog.fine("Assertion (winGraphicsConfig != null) failed"); 516 } 517 } 518 519 // if on a different display, take off old GD and put on new GD 520 if (oldDev != newDev) { 521 oldDev.removeDisplayChangedListener(this); 522 newDev.addDisplayChangedListener(this); 523 } 524 525 AWTAccessor.getComponentAccessor(). 526 setGraphicsConfiguration((Component)target, winGraphicsConfig); 527 } 528 529 /** 530 * From the DisplayChangedListener interface. 531 * 532 * This method handles a display change - either when the display settings 533 * are changed, or when the window has been dragged onto a different 534 * display. 535 * Called after a change in the display mode. This event 536 * triggers replacing the surfaceData object (since that object 537 * reflects the current display depth information, which has 538 * just changed). 539 */ 540 @Override 541 public void displayChanged() { 542 updateGC(); 543 } 544 545 /** 546 * Part of the DisplayChangedListener interface: components 547 * do not need to react to this event 548 */ 549 @Override 550 public void paletteChanged() { 551 } 552 553 private native int getScreenImOn(); 554 555 // Used in Win32GraphicsDevice. 556 public final native void setFullScreenExclusiveModeState(boolean state); 557 558 /* 559 * ----END DISPLAY CHANGE SUPPORT---- 560 */ 561 562 public void grab() { 563 nativeGrab(); 564 } 565 566 public void ungrab() { 567 nativeUngrab(); 568 } 569 private native void nativeGrab(); 570 private native void nativeUngrab(); 571 572 private final boolean hasWarningWindow() { 573 return ((Window)target).getWarningString() != null; 574 } 575 576 boolean isTargetUndecorated() { 577 return true; 578 } 579 580 // These are the peer bounds. They get updated at: 581 // 1. the WWindowPeer.setBounds() method. 582 // 2. the native code (on WM_SIZE/WM_MOVE) 583 private volatile int sysX = 0; 584 private volatile int sysY = 0; 585 private volatile int sysW = 0; 586 private volatile int sysH = 0; 587 588 @Override 589 public native void repositionSecurityWarning(); 590 591 @Override 592 public void setBounds(int x, int y, int width, int height, int op) { 593 sysX = x; 594 sysY = y; 595 sysW = width; 596 sysH = height; 597 598 super.setBounds(x, y, width, height, op); 599 } 600 601 @Override 602 public void print(Graphics g) { 603 // We assume we print the whole frame, 604 // so we expect no clip was set previously 605 Shape shape = AWTAccessor.getWindowAccessor().getShape((Window)target); 606 if (shape != null) { 607 g.setClip(shape); 608 } 609 super.print(g); 610 } 611 612 @SuppressWarnings("deprecation") 613 private void replaceSurfaceDataRecursively(Component c) { 614 if (c instanceof Container) { 615 for (Component child : ((Container)c).getComponents()) { 616 replaceSurfaceDataRecursively(child); 617 } 618 } 619 ComponentPeer cp = c.getPeer(); 620 if (cp instanceof WComponentPeer) { 621 ((WComponentPeer)cp).replaceSurfaceDataLater(); 622 } 623 } 624 625 public final Graphics getTranslucentGraphics() { 626 synchronized (getStateLock()) { 627 return isOpaque ? null : painter.getBackBuffer(false).getGraphics(); 628 } 629 } 630 631 @Override 632 public void setBackground(Color c) { 633 super.setBackground(c); 634 synchronized (getStateLock()) { 635 if (!isOpaque && ((Window)target).isVisible()) { 636 updateWindow(true); 637 } 638 } 639 } 640 641 private native void setOpacity(int iOpacity); 642 private float opacity = 1.0f; 643 644 @Override 645 public void setOpacity(float opacity) { 646 if (!((SunToolkit)((Window)target).getToolkit()). 647 isWindowOpacitySupported()) 648 { 649 return; 650 } 651 652 if (opacity < 0.0f || opacity > 1.0f) { 653 throw new IllegalArgumentException( 654 "The value of opacity should be in the range [0.0f .. 1.0f]."); 655 } 656 657 if (((this.opacity == 1.0f && opacity < 1.0f) || 658 (this.opacity < 1.0f && opacity == 1.0f)) && 659 !Win32GraphicsEnvironment.isVistaOS()) 660 { 661 // non-Vista OS: only replace the surface data if opacity status 662 // changed (see WComponentPeer.isAccelCapable() for more) 663 replaceSurfaceDataRecursively((Component)getTarget()); 664 } 665 666 this.opacity = opacity; 667 668 final int maxOpacity = 0xff; 669 int iOpacity = (int)(opacity * maxOpacity); 670 if (iOpacity < 0) { 671 iOpacity = 0; 672 } 673 if (iOpacity > maxOpacity) { 674 iOpacity = maxOpacity; 675 } 676 677 setOpacity(iOpacity); 678 679 synchronized (getStateLock()) { 680 if (!isOpaque && ((Window)target).isVisible()) { 681 updateWindow(true); 682 } 683 } 684 } 685 686 private native void setOpaqueImpl(boolean isOpaque); 687 688 @Override 689 public void setOpaque(boolean isOpaque) { 690 synchronized (getStateLock()) { 691 if (this.isOpaque == isOpaque) { 692 return; 693 } 694 } 695 696 Window target = (Window)getTarget(); 697 698 if (!isOpaque) { 699 SunToolkit sunToolkit = (SunToolkit)target.getToolkit(); 700 if (!sunToolkit.isWindowTranslucencySupported() || 701 !sunToolkit.isTranslucencyCapable(target.getGraphicsConfiguration())) 702 { 703 return; 704 } 705 } 706 707 boolean isVistaOS = Win32GraphicsEnvironment.isVistaOS(); 708 709 if (this.isOpaque != isOpaque && !isVistaOS) { 710 // non-Vista OS: only replace the surface data if the opacity 711 // status changed (see WComponentPeer.isAccelCapable() for more) 712 replaceSurfaceDataRecursively(target); 713 } 714 715 synchronized (getStateLock()) { 716 this.isOpaque = isOpaque; 717 setOpaqueImpl(isOpaque); 718 if (isOpaque) { 719 TranslucentWindowPainter currentPainter = painter; 720 if (currentPainter != null) { 721 currentPainter.flush(); 722 painter = null; 723 } 724 } else { 725 painter = TranslucentWindowPainter.createInstance(this); 726 } 727 } 728 729 if (isVistaOS) { 730 // On Vista: setting the window non-opaque makes the window look 731 // rectangular, though still catching the mouse clicks within 732 // its shape only. To restore the correct visual appearance 733 // of the window (i.e. w/ the correct shape) we have to reset 734 // the shape. 735 Shape shape = target.getShape(); 736 if (shape != null) { 737 target.setShape(shape); 738 } 739 } 740 741 if (target.isVisible()) { 742 updateWindow(true); 743 } 744 } 745 746 native void updateWindowImpl(int[] data, int width, int height); 747 748 @Override 749 public void updateWindow() { 750 updateWindow(false); 751 } 752 753 private void updateWindow(boolean repaint) { 754 Window w = (Window)target; 755 synchronized (getStateLock()) { 756 if (isOpaque || !w.isVisible() || 757 (w.getWidth() <= 0) || (w.getHeight() <= 0)) 758 { 759 return; 760 } 761 TranslucentWindowPainter currentPainter = painter; 762 if (currentPainter != null) { 763 currentPainter.updateWindow(repaint); 764 } else if (log.isLoggable(PlatformLogger.Level.FINER)) { 765 log.finer("Translucent window painter is null in updateWindow"); 766 } 767 } 768 } 769 770 /* 771 * The method maps the list of the active windows to the window's AppContext, 772 * then the method registers ActiveWindowListener, GuiDisposedListener listeners; 773 * it executes the initilialization only once per AppContext. 774 */ 775 @SuppressWarnings("unchecked") 776 private static void initActiveWindowsTracking(Window w) { 777 AppContext appContext = AppContext.getAppContext(); 778 synchronized (appContext) { 779 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 780 if (l == null) { 781 l = new LinkedList<WWindowPeer>(); 782 appContext.put(ACTIVE_WINDOWS_KEY, l); 783 appContext.addPropertyChangeListener(AppContext.GUI_DISPOSED, guiDisposedListener); 784 785 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager(); 786 kfm.addPropertyChangeListener("activeWindow", activeWindowListener); 787 } 788 } 789 } 790 791 /* 792 * The GuiDisposedListener class listens for the AppContext.GUI_DISPOSED property, 793 * it removes the list of the active windows from the disposed AppContext and 794 * unregisters ActiveWindowListener listener. 795 */ 796 private static class GuiDisposedListener implements PropertyChangeListener { 797 @Override 798 public void propertyChange(PropertyChangeEvent e) { 799 boolean isDisposed = (Boolean)e.getNewValue(); 800 if (isDisposed != true) { 801 if (log.isLoggable(PlatformLogger.Level.FINE)) { 802 log.fine(" Assertion (newValue != true) failed for AppContext.GUI_DISPOSED "); 803 } 804 } 805 AppContext appContext = AppContext.getAppContext(); 806 synchronized (appContext) { 807 appContext.remove(ACTIVE_WINDOWS_KEY); 808 appContext.removePropertyChangeListener(AppContext.GUI_DISPOSED, this); 809 810 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager(); 811 kfm.removePropertyChangeListener("activeWindow", activeWindowListener); 812 } 813 } 814 } 815 816 /* 817 * Static inner class, listens for 'activeWindow' KFM property changes and 818 * updates the list of active windows per AppContext, so the latest active 819 * window is always at the end of the list. The list is stored in AppContext. 820 */ 821 @SuppressWarnings( value = {"deprecation", "unchecked"}) 822 private static class ActiveWindowListener implements PropertyChangeListener { 823 @Override 824 public void propertyChange(PropertyChangeEvent e) { 825 Window w = (Window)e.getNewValue(); 826 if (w == null) { 827 return; 828 } 829 AppContext appContext = SunToolkit.targetToAppContext(w); 830 synchronized (appContext) { 831 WWindowPeer wp = (WWindowPeer)w.getPeer(); 832 // add/move wp to the end of the list 833 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 834 if (l != null) { 835 l.remove(wp); 836 l.add(wp); 837 } 838 } 839 } 840 } 841 }