1 /* 2 * Copyright (c) 1996, 2015, 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 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 native Dimension getNativeWindowSize(); 298 299 public Dimension getScaledWindowSize() { 300 return getNativeWindowSize(); 301 } 302 303 public boolean requestWindowFocus(CausedFocusEvent.Cause cause) { 304 if (!focusAllowedFor()) { 305 return false; 306 } 307 return requestWindowFocus(cause == CausedFocusEvent.Cause.MOUSE_EVENT); 308 } 309 private native boolean requestWindowFocus(boolean isMouseEventCause); 310 311 public boolean focusAllowedFor() { 312 Window window = (Window)this.target; 313 if (!window.isVisible() || 314 !window.isEnabled() || 315 !window.isFocusableWindow()) 316 { 317 return false; 318 } 319 if (isModalBlocked()) { 320 return false; 321 } 322 return true; 323 } 324 325 @Override 326 void hide() { 327 WindowListener listener = windowListener; 328 if (listener != null) { 329 // We're not getting WINDOW_CLOSING from the native code when hiding 330 // the window programmatically. So, create it and notify the listener. 331 listener.windowClosing(new WindowEvent((Window)target, WindowEvent.WINDOW_CLOSING)); 332 } 333 super.hide(); 334 } 335 336 // WARNING: it's called on the Toolkit thread! 337 @Override 338 void preprocessPostEvent(AWTEvent event) { 339 if (event instanceof WindowEvent) { 340 WindowListener listener = windowListener; 341 if (listener != null) { 342 switch(event.getID()) { 343 case WindowEvent.WINDOW_CLOSING: 344 listener.windowClosing((WindowEvent)event); 345 break; 346 case WindowEvent.WINDOW_ICONIFIED: 347 listener.windowIconified((WindowEvent)event); 348 break; 349 } 350 } 351 } 352 } 353 354 synchronized void addWindowListener(WindowListener l) { 355 windowListener = AWTEventMulticaster.add(windowListener, l); 356 } 357 358 synchronized void removeWindowListener(WindowListener l) { 359 windowListener = AWTEventMulticaster.remove(windowListener, l); 360 } 361 362 @Override 363 public void updateMinimumSize() { 364 Dimension minimumSize = null; 365 if (((Component)target).isMinimumSizeSet()) { 366 minimumSize = ((Component)target).getMinimumSize(); 367 } 368 if (minimumSize != null) { 369 int msw = getSysMinWidth(); 370 int msh = getSysMinHeight(); 371 int w = (minimumSize.width >= msw) ? minimumSize.width : msw; 372 int h = (minimumSize.height >= msh) ? minimumSize.height : msh; 373 setMinSize(w, h); 374 } else { 375 setMinSize(0, 0); 376 } 377 } 378 379 @Override 380 public void updateIconImages() { 381 java.util.List<Image> imageList = ((Window)target).getIconImages(); 382 if (imageList == null || imageList.size() == 0) { 383 setIconImagesData(null, 0, 0, null, 0, 0); 384 } else { 385 int w = getSysIconWidth(); 386 int h = getSysIconHeight(); 387 int smw = getSysSmIconWidth(); 388 int smh = getSysSmIconHeight(); 389 DataBufferInt iconData = SunToolkit.getScaledIconData(imageList, 390 w, h); 391 DataBufferInt iconSmData = SunToolkit.getScaledIconData(imageList, 392 smw, smh); 393 if (iconData != null && iconSmData != null) { 394 setIconImagesData(iconData.getData(), w, h, 395 iconSmData.getData(), smw, smh); 396 } else { 397 setIconImagesData(null, 0, 0, null, 0, 0); 398 } 399 } 400 } 401 402 native void setMinSize(int width, int height); 403 404 /* 405 * ---- MODALITY SUPPORT ---- 406 */ 407 408 /** 409 * Some modality-related code here because WFileDialogPeer, WPrintDialogPeer and 410 * WPageDialogPeer are descendants of WWindowPeer, not WDialogPeer 411 */ 412 413 public boolean isModalBlocked() { 414 return modalBlocker != null; 415 } 416 417 @Override 418 public void setModalBlocked(Dialog dialog, boolean blocked) { 419 synchronized (((Component)getTarget()).getTreeLock()) // State lock should always be after awtLock 420 { 421 // use WWindowPeer instead of WDialogPeer because of FileDialogs and PrintDialogs 422 WWindowPeer blockerPeer = AWTAccessor.getComponentAccessor() 423 .getPeer(dialog); 424 if (blocked) 425 { 426 modalBlocker = blockerPeer; 427 // handle native dialogs separately, as they may have not 428 // got HWND yet; modalEnable/modalDisable is called from 429 // their setHWnd() methods 430 if (blockerPeer instanceof WFileDialogPeer) { 431 ((WFileDialogPeer)blockerPeer).blockWindow(this); 432 } else if (blockerPeer instanceof WPrintDialogPeer) { 433 ((WPrintDialogPeer)blockerPeer).blockWindow(this); 434 } else { 435 modalDisable(dialog, blockerPeer.getHWnd()); 436 } 437 } else { 438 modalBlocker = null; 439 if (blockerPeer instanceof WFileDialogPeer) { 440 ((WFileDialogPeer)blockerPeer).unblockWindow(this); 441 } else if (blockerPeer instanceof WPrintDialogPeer) { 442 ((WPrintDialogPeer)blockerPeer).unblockWindow(this); 443 } else { 444 modalEnable(dialog); 445 } 446 } 447 } 448 } 449 450 native void modalDisable(Dialog blocker, long blockerHWnd); 451 native void modalEnable(Dialog blocker); 452 453 /* 454 * Returns all the ever active windows from the current AppContext. 455 * The list is sorted by the time of activation, so the latest 456 * active window is always at the end. 457 */ 458 @SuppressWarnings("unchecked") 459 public static long[] getActiveWindowHandles(Component target) { 460 AppContext appContext = SunToolkit.targetToAppContext(target); 461 if (appContext == null) return null; 462 synchronized (appContext) { 463 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 464 if (l == null) { 465 return null; 466 } 467 long[] result = new long[l.size()]; 468 for (int j = 0; j < l.size(); j++) { 469 result[j] = l.get(j).getHWnd(); 470 } 471 return result; 472 } 473 } 474 475 /* 476 * ----DISPLAY CHANGE SUPPORT---- 477 */ 478 479 /* 480 * Called from native code when we have been dragged onto another screen. 481 */ 482 void draggedToNewScreen() { 483 SunToolkit.executeOnEventHandlerThread((Component)target,new Runnable() 484 { 485 @Override 486 public void run() { 487 displayChanged(); 488 } 489 }); 490 } 491 492 public void updateGC() { 493 int scrn = getScreenImOn(); 494 if (screenLog.isLoggable(PlatformLogger.Level.FINER)) { 495 log.finer("Screen number: " + scrn); 496 } 497 498 // get current GD 499 Win32GraphicsDevice oldDev = winGraphicsConfig.getDevice(); 500 501 Win32GraphicsDevice newDev; 502 GraphicsDevice devs[] = GraphicsEnvironment 503 .getLocalGraphicsEnvironment() 504 .getScreenDevices(); 505 // Occasionally during device addition/removal getScreenImOn can return 506 // a non-existing screen number. Use the default device in this case. 507 if (scrn >= devs.length) { 508 newDev = (Win32GraphicsDevice)GraphicsEnvironment 509 .getLocalGraphicsEnvironment().getDefaultScreenDevice(); 510 } else { 511 newDev = (Win32GraphicsDevice)devs[scrn]; 512 } 513 514 // Set winGraphicsConfig to the default GC for the monitor this Window 515 // is now mostly on. 516 winGraphicsConfig = (Win32GraphicsConfig)newDev 517 .getDefaultConfiguration(); 518 if (screenLog.isLoggable(PlatformLogger.Level.FINE)) { 519 if (winGraphicsConfig == null) { 520 screenLog.fine("Assertion (winGraphicsConfig != null) failed"); 521 } 522 } 523 524 // if on a different display, take off old GD and put on new GD 525 if (oldDev != newDev) { 526 oldDev.removeDisplayChangedListener(this); 527 newDev.addDisplayChangedListener(this); 528 } 529 530 AWTAccessor.getComponentAccessor(). 531 setGraphicsConfiguration((Component)target, winGraphicsConfig); 532 } 533 534 /** 535 * From the DisplayChangedListener interface. 536 * 537 * This method handles a display change - either when the display settings 538 * are changed, or when the window has been dragged onto a different 539 * display. 540 * Called after a change in the display mode. This event 541 * triggers replacing the surfaceData object (since that object 542 * reflects the current display depth information, which has 543 * just changed). 544 */ 545 @Override 546 public void displayChanged() { 547 updateGC(); 548 } 549 550 /** 551 * Part of the DisplayChangedListener interface: components 552 * do not need to react to this event 553 */ 554 @Override 555 public void paletteChanged() { 556 } 557 558 private native int getScreenImOn(); 559 560 // Used in Win32GraphicsDevice. 561 public final native void setFullScreenExclusiveModeState(boolean state); 562 563 /* 564 * ----END DISPLAY CHANGE SUPPORT---- 565 */ 566 567 public void grab() { 568 nativeGrab(); 569 } 570 571 public void ungrab() { 572 nativeUngrab(); 573 } 574 private native void nativeGrab(); 575 private native void nativeUngrab(); 576 577 private final boolean hasWarningWindow() { 578 return ((Window)target).getWarningString() != null; 579 } 580 581 boolean isTargetUndecorated() { 582 return true; 583 } 584 585 // These are the peer bounds. They get updated at: 586 // 1. the WWindowPeer.setBounds() method. 587 // 2. the native code (on WM_SIZE/WM_MOVE) 588 private volatile int sysX = 0; 589 private volatile int sysY = 0; 590 private volatile int sysW = 0; 591 private volatile int sysH = 0; 592 593 @Override 594 public native void repositionSecurityWarning(); 595 596 @Override 597 public void setBounds(int x, int y, int width, int height, int op) { 598 sysX = x; 599 sysY = y; 600 sysW = width; 601 sysH = height; 602 603 super.setBounds(x, y, width, height, op); 604 } 605 606 @Override 607 public void print(Graphics g) { 608 // We assume we print the whole frame, 609 // so we expect no clip was set previously 610 Shape shape = AWTAccessor.getWindowAccessor().getShape((Window)target); 611 if (shape != null) { 612 g.setClip(shape); 613 } 614 super.print(g); 615 } 616 617 private void replaceSurfaceDataRecursively(Component c) { 618 if (c instanceof Container) { 619 for (Component child : ((Container)c).getComponents()) { 620 replaceSurfaceDataRecursively(child); 621 } 622 } 623 final Object cp = AWTAccessor.getComponentAccessor().getPeer(c); 624 if (cp instanceof WComponentPeer) { 625 ((WComponentPeer)cp).replaceSurfaceDataLater(); 626 } 627 } 628 629 public final Graphics getTranslucentGraphics() { 630 synchronized (getStateLock()) { 631 return isOpaque ? null : painter.getBackBuffer(false).getGraphics(); 632 } 633 } 634 635 @Override 636 public void setBackground(Color c) { 637 super.setBackground(c); 638 synchronized (getStateLock()) { 639 if (!isOpaque && ((Window)target).isVisible()) { 640 updateWindow(true); 641 } 642 } 643 } 644 645 private native void setOpacity(int iOpacity); 646 private float opacity = 1.0f; 647 648 @Override 649 public void setOpacity(float opacity) { 650 if (!((SunToolkit)((Window)target).getToolkit()). 651 isWindowOpacitySupported()) 652 { 653 return; 654 } 655 656 if (opacity < 0.0f || opacity > 1.0f) { 657 throw new IllegalArgumentException( 658 "The value of opacity should be in the range [0.0f .. 1.0f]."); 659 } 660 661 if (((this.opacity == 1.0f && opacity < 1.0f) || 662 (this.opacity < 1.0f && opacity == 1.0f)) && 663 !Win32GraphicsEnvironment.isVistaOS()) 664 { 665 // non-Vista OS: only replace the surface data if opacity status 666 // changed (see WComponentPeer.isAccelCapable() for more) 667 replaceSurfaceDataRecursively((Component)getTarget()); 668 } 669 670 this.opacity = opacity; 671 672 final int maxOpacity = 0xff; 673 int iOpacity = (int)(opacity * maxOpacity); 674 if (iOpacity < 0) { 675 iOpacity = 0; 676 } 677 if (iOpacity > maxOpacity) { 678 iOpacity = maxOpacity; 679 } 680 681 setOpacity(iOpacity); 682 683 synchronized (getStateLock()) { 684 if (!isOpaque && ((Window)target).isVisible()) { 685 updateWindow(true); 686 } 687 } 688 } 689 690 private native void setOpaqueImpl(boolean isOpaque); 691 692 @Override 693 public void setOpaque(boolean isOpaque) { 694 synchronized (getStateLock()) { 695 if (this.isOpaque == isOpaque) { 696 return; 697 } 698 } 699 700 Window target = (Window)getTarget(); 701 702 if (!isOpaque) { 703 SunToolkit sunToolkit = (SunToolkit)target.getToolkit(); 704 if (!sunToolkit.isWindowTranslucencySupported() || 705 !sunToolkit.isTranslucencyCapable(target.getGraphicsConfiguration())) 706 { 707 return; 708 } 709 } 710 711 boolean isVistaOS = Win32GraphicsEnvironment.isVistaOS(); 712 713 if (this.isOpaque != isOpaque && !isVistaOS) { 714 // non-Vista OS: only replace the surface data if the opacity 715 // status changed (see WComponentPeer.isAccelCapable() for more) 716 replaceSurfaceDataRecursively(target); 717 } 718 719 synchronized (getStateLock()) { 720 this.isOpaque = isOpaque; 721 setOpaqueImpl(isOpaque); 722 if (isOpaque) { 723 TranslucentWindowPainter currentPainter = painter; 724 if (currentPainter != null) { 725 currentPainter.flush(); 726 painter = null; 727 } 728 } else { 729 painter = TranslucentWindowPainter.createInstance(this); 730 } 731 } 732 733 if (isVistaOS) { 734 // On Vista: setting the window non-opaque makes the window look 735 // rectangular, though still catching the mouse clicks within 736 // its shape only. To restore the correct visual appearance 737 // of the window (i.e. w/ the correct shape) we have to reset 738 // the shape. 739 Shape shape = target.getShape(); 740 if (shape != null) { 741 target.setShape(shape); 742 } 743 } 744 745 if (target.isVisible()) { 746 updateWindow(true); 747 } 748 } 749 750 native void updateWindowImpl(int[] data, int width, int height); 751 752 @Override 753 public void updateWindow() { 754 updateWindow(false); 755 } 756 757 private void updateWindow(boolean repaint) { 758 Window w = (Window)target; 759 synchronized (getStateLock()) { 760 if (isOpaque || !w.isVisible() || 761 (w.getWidth() <= 0) || (w.getHeight() <= 0)) 762 { 763 return; 764 } 765 TranslucentWindowPainter currentPainter = painter; 766 if (currentPainter != null) { 767 currentPainter.updateWindow(repaint); 768 } else if (log.isLoggable(PlatformLogger.Level.FINER)) { 769 log.finer("Translucent window painter is null in updateWindow"); 770 } 771 } 772 } 773 774 /* 775 * The method maps the list of the active windows to the window's AppContext, 776 * then the method registers ActiveWindowListener, GuiDisposedListener listeners; 777 * it executes the initilialization only once per AppContext. 778 */ 779 @SuppressWarnings("unchecked") 780 private static void initActiveWindowsTracking(Window w) { 781 AppContext appContext = AppContext.getAppContext(); 782 synchronized (appContext) { 783 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 784 if (l == null) { 785 l = new LinkedList<WWindowPeer>(); 786 appContext.put(ACTIVE_WINDOWS_KEY, l); 787 appContext.addPropertyChangeListener(AppContext.GUI_DISPOSED, guiDisposedListener); 788 789 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager(); 790 kfm.addPropertyChangeListener("activeWindow", activeWindowListener); 791 } 792 } 793 } 794 795 /* 796 * The GuiDisposedListener class listens for the AppContext.GUI_DISPOSED property, 797 * it removes the list of the active windows from the disposed AppContext and 798 * unregisters ActiveWindowListener listener. 799 */ 800 private static class GuiDisposedListener implements PropertyChangeListener { 801 @Override 802 public void propertyChange(PropertyChangeEvent e) { 803 boolean isDisposed = (Boolean)e.getNewValue(); 804 if (isDisposed != true) { 805 if (log.isLoggable(PlatformLogger.Level.FINE)) { 806 log.fine(" Assertion (newValue != true) failed for AppContext.GUI_DISPOSED "); 807 } 808 } 809 AppContext appContext = AppContext.getAppContext(); 810 synchronized (appContext) { 811 appContext.remove(ACTIVE_WINDOWS_KEY); 812 appContext.removePropertyChangeListener(AppContext.GUI_DISPOSED, this); 813 814 KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager(); 815 kfm.removePropertyChangeListener("activeWindow", activeWindowListener); 816 } 817 } 818 } 819 820 /* 821 * Static inner class, listens for 'activeWindow' KFM property changes and 822 * updates the list of active windows per AppContext, so the latest active 823 * window is always at the end of the list. The list is stored in AppContext. 824 */ 825 @SuppressWarnings("unchecked") 826 private static class ActiveWindowListener implements PropertyChangeListener { 827 @Override 828 public void propertyChange(PropertyChangeEvent e) { 829 Window w = (Window)e.getNewValue(); 830 if (w == null) { 831 return; 832 } 833 AppContext appContext = SunToolkit.targetToAppContext(w); 834 synchronized (appContext) { 835 WWindowPeer wp = AWTAccessor.getComponentAccessor().getPeer(w); 836 // add/move wp to the end of the list 837 List<WWindowPeer> l = (List<WWindowPeer>)appContext.get(ACTIVE_WINDOWS_KEY); 838 if (l != null) { 839 l.remove(wp); 840 l.add(wp); 841 } 842 } 843 } 844 } 845 }