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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2008, 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 | |||
| 26 | package java.awt; | ||
| 27 | |||
| 28 | import java.util.Vector; | ||
| 29 | import java.awt.peer.SystemTrayPeer; | ||
| 30 | import java.beans.PropertyChangeListener; | ||
| 31 | import java.beans.PropertyChangeSupport; | ||
| 32 | import sun.awt.AppContext; | ||
| 33 | import sun.awt.SunToolkit; | ||
| 34 | import sun.awt.HeadlessToolkit; | ||
| 35 | import sun.security.util.SecurityConstants; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * The <code>SystemTray</code> class represents the system tray for a | ||
| 39 | * desktop. On Microsoft Windows it is referred to as the "Taskbar | ||
| 40 | * Status Area", on Gnome it is referred to as the "Notification | ||
| 41 | * Area", on KDE it is referred to as the "System Tray". The system | ||
| 42 | * tray is shared by all applications running on the desktop. | ||
| 43 | * | ||
| 44 | * <p> On some platforms the system tray may not be present or may not | ||
| 45 | * be supported, in this case {@link SystemTray#getSystemTray()} | ||
| 46 | * throws {@link UnsupportedOperationException}. To detect whether the | ||
| 47 | * system tray is supported, use {@link SystemTray#isSupported}. | ||
| 48 | * | ||
| 49 | * <p>The <code>SystemTray</code> may contain one or more {@link | ||
| 50 | * TrayIcon TrayIcons}, which are added to the tray using the {@link | ||
| 51 | * #add} method, and removed when no longer needed, using the | ||
| 52 | * {@link #remove}. <code>TrayIcon</code> consists of an | ||
| 53 | * image, a popup menu and a set of associated listeners. Please see | ||
| 54 | * the {@link TrayIcon} class for details. | ||
| 55 | * | ||
| 56 | * <p>Every Java application has a single <code>SystemTray</code> | ||
| 57 | * instance that allows the app to interface with the system tray of | ||
| 58 | * the desktop while the app is running. The <code>SystemTray</code> | ||
| 59 | * instance can be obtained from the {@link #getSystemTray} method. | ||
| 60 | * An application may not create its own instance of | ||
| 61 | * <code>SystemTray</code>. | ||
| 62 | * | ||
| 63 | * <p>The following code snippet demonstrates how to access | ||
| 64 | * and customize the system tray: | ||
| 65 | * <code> | ||
| 66 | * <pre> | ||
| 67 | * {@link TrayIcon} trayIcon = null; | ||
| 68 | * if (SystemTray.isSupported()) { | ||
| 69 | * // get the SystemTray instance | ||
| 70 | * SystemTray tray = SystemTray.{@link #getSystemTray}; | ||
| 71 | * // load an image | ||
| 72 | * {@link java.awt.Image} image = {@link java.awt.Toolkit#getImage(String) Toolkit.getDefaultToolkit().getImage}(...); | ||
| 73 | * // create a action listener to listen for default action executed on the tray icon | ||
| 74 | * {@link java.awt.event.ActionListener} listener = new {@link java.awt.event.ActionListener ActionListener}() { | ||
| 75 | * public void {@link java.awt.event.ActionListener#actionPerformed actionPerformed}({@link java.awt.event.ActionEvent} e) { | ||
| 76 | * // execute default action of the application | ||
| 77 | * // ... | ||
| 78 | * } | ||
| 79 | * }; | ||
| 80 | * // create a popup menu | ||
| 81 | * {@link java.awt.PopupMenu} popup = new {@link java.awt.PopupMenu#PopupMenu PopupMenu}(); | ||
| 82 | * // create menu item for the default action | ||
| 83 | * MenuItem defaultItem = new MenuItem(...); | ||
| 84 | * defaultItem.addActionListener(listener); | ||
| 85 | * popup.add(defaultItem); | ||
| 86 | * /// ... add other items | ||
| 87 | * // construct a TrayIcon | ||
| 88 | * trayIcon = new {@link TrayIcon#TrayIcon(java.awt.Image, String, java.awt.PopupMenu) TrayIcon}(image, "Tray Demo", popup); | ||
| 89 | * // set the TrayIcon properties | ||
| 90 | * trayIcon.{@link TrayIcon#addActionListener(java.awt.event.ActionListener) addActionListener}(listener); | ||
| 91 | * // ... | ||
| 92 | * // add the tray image | ||
| 93 | * try { | ||
| 94 | * tray.{@link SystemTray#add(TrayIcon) add}(trayIcon); | ||
| 95 | * } catch (AWTException e) { | ||
| 96 | * System.err.println(e); | ||
| 97 | * } | ||
| 98 | * // ... | ||
| 99 | * } else { | ||
| 100 | * // disable tray option in your application or | ||
| 101 | * // perform other actions | ||
| 102 | * ... | ||
| 103 | * } | ||
| 104 | * // ... | ||
| 105 | * // some time later | ||
| 106 | * // the application state has changed - update the image | ||
| 107 | * if (trayIcon != null) { | ||
| 108 | * trayIcon.{@link TrayIcon#setImage(java.awt.Image) setImage}(updatedImage); | ||
| 109 | * } | ||
| 110 | * // ... | ||
| 111 | * </pre> | ||
| 112 | * </code> | ||
| 113 | * | ||
| 114 | * @since 1.6 | ||
| 115 | * @see TrayIcon | ||
| 116 | * | ||
| 117 | * @author Bino George | ||
| 118 | * @author Denis Mikhalkin | ||
| 119 | * @author Sharon Zakhour | ||
| 120 | * @author Anton Tarasov | ||
| 121 | */ | ||
| 122 | public class SystemTray { | ||
| 123 | private static SystemTray systemTray; | ||
| 124 | private int currentIconID = 0; // each TrayIcon added gets a unique ID | ||
| 125 | |||
| 126 | transient private SystemTrayPeer peer; | ||
| 127 | |||
| 128 | private static final TrayIcon[] EMPTY_TRAY_ARRAY = new TrayIcon[0]; | ||
| 129 | |||
| 130 | /** | ||
| 131 | * Private <code>SystemTray</code> constructor. | ||
| 132 | * | ||
| 133 | */ | ||
| 134 | private SystemTray() { | ||
| 135 | addNotify(); | ||
| 136 | } | ||
| 137 | |||
| 138 | /** | ||
| 139 | * Gets the <code>SystemTray</code> instance that represents the | ||
| 140 | * desktop's tray area. This always returns the same instance per | ||
| 141 | * application. On some platforms the system tray may not be | ||
| 142 | * supported. You may use the {@link #isSupported} method to | ||
| 143 | * check if the system tray is supported. | ||
| 144 | * | ||
| 145 | * <p>If a SecurityManager is installed, the AWTPermission | ||
| 146 | * {@code accessSystemTray} must be granted in order to get the | ||
| 147 | * {@code SystemTray} instance. Otherwise this method will throw a | ||
| 148 | * SecurityException. | ||
| 149 | * | ||
| 150 | * @return the <code>SystemTray</code> instance that represents | ||
| 151 | * the desktop's tray area | ||
| 152 | * @throws UnsupportedOperationException if the system tray isn't | ||
| 153 | * supported by the current platform | ||
| 154 | * @throws HeadlessException if | ||
| 155 | * <code>GraphicsEnvironment.isHeadless()</code> returns <code>true</code> | ||
| 156 | * @throws SecurityException if {@code accessSystemTray} permission | ||
| 157 | * is not granted | ||
| 158 | * @see #add(TrayIcon) | ||
| 159 | * @see TrayIcon | ||
| 160 | * @see #isSupported | ||
| 161 | * @see SecurityManager#checkPermission | ||
| 162 | * @see AWTPermission | ||
| 163 | */ | ||
| 164 | public static SystemTray getSystemTray() { | ||
| 165 | checkSystemTrayAllowed(); | ||
| 166 | if (GraphicsEnvironment.isHeadless()) { | ||
| 167 | throw new HeadlessException(); | ||
| 168 | } | ||
| 169 | |||
| 170 | initializeSystemTrayIfNeeded(); | ||
| 171 | |||
| 172 | if (!isSupported()) { | ||
| 173 | throw new UnsupportedOperationException( | ||
| 174 | "The system tray is not supported on the current platform."); | ||
| 175 | } | ||
| 176 | |||
| 177 | return systemTray; | ||
| 178 | } | ||
| 179 | |||
| 180 | /** | ||
| 181 | * Returns whether the system tray is supported on the current | ||
| 182 | * platform. In addition to displaying the tray icon, minimal | ||
| 183 | * system tray support includes either a popup menu (see {@link | ||
| 184 | * TrayIcon#setPopupMenu(PopupMenu)}) or an action event (see | ||
| 185 | * {@link TrayIcon#addActionListener(ActionListener)}). | ||
| 186 | * | ||
| 187 | * <p>Developers should not assume that all of the system tray | ||
| 188 | * functionality is supported. To guarantee that the tray icon's | ||
| 189 | * default action is always accessible, add the default action to | ||
| 190 | * both the action listener and the popup menu. See the {@link | ||
| 191 | * SystemTray example} for an example of how to do this. | ||
| 192 | * | ||
| 193 | * <p><b>Note</b>: When implementing <code>SystemTray</code> and | ||
| 194 | * <code>TrayIcon</code> it is <em>strongly recommended</em> that | ||
| 195 | * you assign different gestures to the popup menu and an action | ||
| 196 | * event. Overloading a gesture for both purposes is confusing | ||
| 197 | * and may prevent the user from accessing one or the other. | ||
| 198 | * | ||
| 199 | * @see #getSystemTray | ||
| 200 | * @return <code>false</code> if no system tray access is supported; this | ||
| 201 | * method returns <code>true</code> if the minimal system tray access is | ||
| 202 | * supported but does not guarantee that all system tray | ||
| 203 | * functionality is supported for the current platform | ||
| 204 | */ | ||
| 205 | public static boolean isSupported() { | ||
| 206 | Toolkit toolkit = Toolkit.getDefaultToolkit(); | ||
| 207 | if (toolkit instanceof SunToolkit) { | ||
| 208 | // connecting tray to native resource | ||
| 209 | initializeSystemTrayIfNeeded(); | ||
| 210 | return ((SunToolkit)toolkit).isTraySupported(); | ||
| 211 | } else if (toolkit instanceof HeadlessToolkit) { | ||
| 212 | // skip initialization as the init routine | ||
| 213 | // throws HeadlessException | ||
| 214 | return ((HeadlessToolkit)toolkit).isTraySupported(); | ||
| 215 | } else { | ||
| 216 | return false; | ||
| 217 | } | ||
| 218 | } | ||
| 219 | |||
| 220 | /** | ||
| 221 | * Adds a <code>TrayIcon</code> to the <code>SystemTray</code>. | ||
| 222 | * The tray icon becomes visible in the system tray once it is | ||
| 223 | * added. The order in which icons are displayed in a tray is not | ||
| 224 | * specified - it is platform and implementation-dependent. | ||
| 225 | * | ||
| 226 | * <p> All icons added by the application are automatically | ||
| 227 | * removed from the <code>SystemTray</code> upon application exit | ||
| 228 | * and also when the desktop system tray becomes unavailable. | ||
| 229 | * | ||
| 230 | * @param trayIcon the <code>TrayIcon</code> to be added | ||
| 231 | * @throws NullPointerException if <code>trayIcon</code> is | ||
| 232 | * <code>null</code> | ||
| 233 | * @throws IllegalArgumentException if the same instance of | ||
| 234 | * a <code>TrayIcon</code> is added more than once | ||
| 235 | * @throws AWTException if the desktop system tray is missing | ||
| 236 | * @see #remove(TrayIcon) | ||
| 237 | * @see #getSystemTray | ||
| 238 | * @see TrayIcon | ||
| 239 | * @see java.awt.Image | ||
| 240 | */ | ||
| 241 | public void add(TrayIcon trayIcon) throws AWTException { | ||
| 242 | if (trayIcon == null) { | ||
| 243 | throw new NullPointerException("adding null TrayIcon"); | ||
| 244 | } | ||
| 245 | TrayIcon[] oldArray = null, newArray = null; | ||
| 246 | Vector<TrayIcon> icons = null; | ||
| 247 | synchronized (this) { | ||
| 248 | oldArray = systemTray.getTrayIcons(); | ||
| 249 | icons = (Vector<TrayIcon>)AppContext.getAppContext().get(TrayIcon.class); | ||
| 250 | if (icons == null) { | ||
| 251 | icons = new Vector<TrayIcon>(3); | ||
| 252 | AppContext.getAppContext().put(TrayIcon.class, icons); | ||
| 253 | |||
| 254 | } else if (icons.contains(trayIcon)) { | ||
| 255 | throw new IllegalArgumentException("adding TrayIcon that is already added"); | ||
| 256 | } | ||
| 257 | icons.add(trayIcon); | ||
| 258 | newArray = systemTray.getTrayIcons(); | ||
| 259 | |||
| 260 | trayIcon.setID(++currentIconID); | ||
| 261 | } | ||
| 262 | try { | ||
| 263 | trayIcon.addNotify(); | ||
| 264 | } catch (AWTException e) { | ||
| 265 | icons.remove(trayIcon); | ||
| 266 | throw e; | ||
| 267 | } | ||
| 268 | firePropertyChange("trayIcons", oldArray, newArray); | ||
| 269 | } | ||
| 270 | |||
| 271 | /** | ||
| 272 | * Removes the specified <code>TrayIcon</code> from the | ||
| 273 | * <code>SystemTray</code>. | ||
| 274 | * | ||
| 275 | * <p> All icons added by the application are automatically | ||
| 276 | * removed from the <code>SystemTray</code> upon application exit | ||
| 277 | * and also when the desktop system tray becomes unavailable. | ||
| 278 | * | ||
| 279 | * <p> If <code>trayIcon</code> is <code>null</code> or was not | ||
| 280 | * added to the system tray, no exception is thrown and no action | ||
| 281 | * is performed. | ||
| 282 | * | ||
| 283 | * @param trayIcon the <code>TrayIcon</code> to be removed | ||
| 284 | * @see #add(TrayIcon) | ||
| 285 | * @see TrayIcon | ||
| 286 | */ | ||
| 287 | public void remove(TrayIcon trayIcon) { | ||
| 288 | if (trayIcon == null) { | ||
| 289 | return; | ||
| 290 | } | ||
| 291 | TrayIcon[] oldArray = null, newArray = null; | ||
| 292 | synchronized (this) { | ||
| 293 | oldArray = systemTray.getTrayIcons(); | ||
| 294 | Vector<TrayIcon> icons = (Vector<TrayIcon>)AppContext.getAppContext().get(TrayIcon.class); | ||
| 295 | // TrayIcon with no peer is not contained in the array. | ||
| 296 | if (icons == null || !icons.remove(trayIcon)) { | ||
| 297 | return; | ||
| 298 | } | ||
| 299 | trayIcon.removeNotify(); | ||
| 300 | newArray = systemTray.getTrayIcons(); | ||
| 301 | } | ||
| 302 | firePropertyChange("trayIcons", oldArray, newArray); | ||
| 303 | } | ||
| 304 | |||
| 305 | /** | ||
| 306 | * Returns an array of all icons added to the tray by this | ||
| 307 | * application. You can't access the icons added by another | ||
| 308 | * application. Some browsers partition applets in different | ||
| 309 | * code bases into separate contexts, and establish walls between | ||
| 310 | * these contexts. In such a scenario, only the tray icons added | ||
| 311 | * from this context will be returned. | ||
| 312 | * | ||
| 313 | * <p> The returned array is a copy of the actual array and may be | ||
| 314 | * modified in any way without affecting the system tray. To | ||
| 315 | * remove a <code>TrayIcon</code> from the | ||
| 316 | * <code>SystemTray</code>, use the {@link | ||
| 317 | * #remove(TrayIcon)} method. | ||
| 318 | * | ||
| 319 | * @return an array of all tray icons added to this tray, or an | ||
| 320 | * empty array if none has been added | ||
| 321 | * @see #add(TrayIcon) | ||
| 322 | * @see TrayIcon | ||
| 323 | */ | ||
| 324 | public TrayIcon[] getTrayIcons() { | ||
| 325 | Vector<TrayIcon> icons = (Vector<TrayIcon>)AppContext.getAppContext().get(TrayIcon.class); | ||
| 326 | if (icons != null) { | ||
| 327 | return (TrayIcon[])icons.toArray(new TrayIcon[icons.size()]); | ||
| 328 | } | ||
| 329 | return EMPTY_TRAY_ARRAY; | ||
| 330 | } | ||
| 331 | |||
| 332 | /** | ||
| 333 | * Returns the size, in pixels, of the space that a tray icon will | ||
| 334 | * occupy in the system tray. Developers may use this methods to | ||
| 335 | * acquire the preferred size for the image property of a tray icon | ||
| 336 | * before it is created. For convenience, there is a similar | ||
| 337 | * method {@link TrayIcon#getSize} in the <code>TrayIcon</code> class. | ||
| 338 | * | ||
| 339 | * @return the default size of a tray icon, in pixels | ||
| 340 | * @see TrayIcon#setImageAutoSize(boolean) | ||
| 341 | * @see java.awt.Image | ||
| 342 | * @see TrayIcon#getSize() | ||
| 343 | */ | ||
| 344 | public Dimension getTrayIconSize() { | ||
| 345 | return peer.getTrayIconSize(); | ||
| 346 | } | ||
| 347 | |||
| 348 | /** | ||
| 349 | * Adds a {@code PropertyChangeListener} to the list of listeners for the | ||
| 350 | * specific property. The following properties are currently supported: | ||
| 351 | * <p> </p> | ||
| 352 | * <table border=1 summary="SystemTray properties"> | ||
| 353 | * <tr> | ||
| 354 | * <th>Property</th> | ||
| 355 | * <th>Description</th> | ||
| 356 | * </tr> | ||
| 357 | * <tr> | ||
| 358 | * <td>{@code trayIcons}</td> | ||
| 359 | * <td>The {@code SystemTray}'s array of {@code TrayIcon} objects. | ||
| 360 | * The array is accessed via the {@link #getTrayIcons} method.<br> | ||
| 361 | * This property is changed when a tray icon is added to (or removed | ||
| 362 | * from) the system tray.<br> For example, this property is changed | ||
| 363 | * when the system tray becomes unavailable on the desktop<br> | ||
| 364 | * and the tray icons are automatically removed.</td> | ||
| 365 | * </tr> | ||
| 366 | * <tr> | ||
| 367 | * <td>{@code systemTray}</td> | ||
| 368 | * <td>This property contains {@code SystemTray} instance when the system tray | ||
| 369 | * is available or <code>null</code> otherwise.<br> This property is changed | ||
| 370 | * when the system tray becomes available or unavailable on the desktop.<br> | ||
| 371 | * The property is accessed by the {@link #getSystemTray} method.</td> | ||
| 372 | * </tr> | ||
| 373 | * </table> | ||
| 374 | * <p> </p> | ||
| 375 | * The {@code listener} listens to property changes only in this context. | ||
| 376 | * <p> | ||
| 377 | * If {@code listener} is {@code null}, no exception is thrown | ||
| 378 | * and no action is performed. | ||
| 379 | * | ||
| 380 | * @param propertyName the specified property | ||
| 381 | * @param listener the property change listener to be added | ||
| 382 | * | ||
| 383 | * @see #removePropertyChangeListener | ||
| 384 | * @see #getPropertyChangeListeners | ||
| 385 | */ | ||
| 386 | public synchronized void addPropertyChangeListener(String propertyName, | ||
| 387 | PropertyChangeListener listener) | ||
| 388 | { | ||
| 389 | if (listener == null) { | ||
| 390 | return; | ||
| 391 | } | ||
| 392 | getCurrentChangeSupport().addPropertyChangeListener(propertyName, listener); | ||
| 393 | } | ||
| 394 | |||
| 395 | /** | ||
| 396 | * Removes a {@code PropertyChangeListener} from the listener list | ||
| 397 | * for a specific property. | ||
| 398 | * <p> | ||
| 399 | * The {@code PropertyChangeListener} must be from this context. | ||
| 400 | * <p> | ||
| 401 | * If {@code propertyName} or {@code listener} is {@code null} or invalid, | ||
| 402 | * no exception is thrown and no action is taken. | ||
| 403 | * | ||
| 404 | * @param propertyName the specified property | ||
| 405 | * @param listener the PropertyChangeListener to be removed | ||
| 406 | * | ||
| 407 | * @see #addPropertyChangeListener | ||
| 408 | * @see #getPropertyChangeListeners | ||
| 409 | */ | ||
| 410 | public synchronized void removePropertyChangeListener(String propertyName, | ||
| 411 | PropertyChangeListener listener) | ||
| 412 | { | ||
| 413 | if (listener == null) { | ||
| 414 | return; | ||
| 415 | } | ||
| 416 | getCurrentChangeSupport().removePropertyChangeListener(propertyName, listener); | ||
| 417 | } | ||
| 418 | |||
| 419 | /** | ||
| 420 | * Returns an array of all the listeners that have been associated | ||
| 421 | * with the named property. | ||
| 422 | * <p> | ||
| 423 | * Only the listeners in this context are returned. | ||
| 424 | * | ||
| 425 | * @param propertyName the specified property | ||
| 426 | * @return all of the {@code PropertyChangeListener}s associated with | ||
| 427 | * the named property; if no such listeners have been added or | ||
| 428 | * if {@code propertyName} is {@code null} or invalid, an empty | ||
| 429 | * array is returned | ||
| 430 | * | ||
| 431 | * @see #addPropertyChangeListener | ||
| 432 | * @see #removePropertyChangeListener | ||
| 433 | */ | ||
| 434 | public synchronized PropertyChangeListener[] getPropertyChangeListeners(String propertyName) { | ||
| 435 | return getCurrentChangeSupport().getPropertyChangeListeners(propertyName); | ||
| 436 | } | ||
| 437 | |||
| 438 | |||
| 439 | // *************************************************************** | ||
| 440 | // *************************************************************** | ||
| 441 | |||
| 442 | |||
| 443 | /** | ||
| 444 | * Support for reporting bound property changes for Object properties. | ||
| 445 | * This method can be called when a bound property has changed and it will | ||
| 446 | * send the appropriate PropertyChangeEvent to any registered | ||
| 447 | * PropertyChangeListeners. | ||
| 448 | * | ||
| 449 | * @param propertyName the property whose value has changed | ||
| 450 | * @param oldValue the property's previous value | ||
| 451 | * @param newValue the property's new value | ||
| 452 | */ | ||
| 453 | private void firePropertyChange(String propertyName, | ||
| 454 | Object oldValue, Object newValue) | ||
| 455 | { | ||
| 456 | if (oldValue != null && newValue != null && oldValue.equals(newValue)) { | ||
| 457 | return; | ||
| 458 | } | ||
| 459 | getCurrentChangeSupport().firePropertyChange(propertyName, oldValue, newValue); | ||
| 460 | } | ||
| 461 | |||
| 462 | /** | ||
| 463 | * Returns the current PropertyChangeSupport instance for the | ||
| 464 | * calling thread's context. | ||
| 465 | * | ||
| 466 | * @return this thread's context's PropertyChangeSupport | ||
| 467 | */ | ||
| 468 | private synchronized PropertyChangeSupport getCurrentChangeSupport() { | ||
| 469 | PropertyChangeSupport changeSupport = | ||
| 470 | (PropertyChangeSupport)AppContext.getAppContext().get(SystemTray.class); | ||
| 471 | |||
| 472 | if (changeSupport == null) { | ||
| 473 | changeSupport = new PropertyChangeSupport(this); | ||
| 474 | AppContext.getAppContext().put(SystemTray.class, changeSupport); | ||
| 475 | } | ||
| 476 | return changeSupport; | ||
| 477 | } | ||
| 478 | |||
| 479 | synchronized void addNotify() { | ||
| 480 | if (peer == null) { | ||
| 481 | Toolkit toolkit = Toolkit.getDefaultToolkit(); | ||
| 482 | if (toolkit instanceof SunToolkit) { | ||
| 483 | peer = ((SunToolkit)Toolkit.getDefaultToolkit()).createSystemTray(this); | ||
| 484 | } else if (toolkit instanceof HeadlessToolkit) { | ||
| 485 | peer = ((HeadlessToolkit)Toolkit.getDefaultToolkit()).createSystemTray(this); | ||
| 486 | } | ||
| 487 | } | ||
| 488 | } | ||
| 489 | |||
| 490 | static void checkSystemTrayAllowed() { | ||
| 491 | SecurityManager security = System.getSecurityManager(); | ||
| 492 | if (security != null) { | ||
| 493 | security.checkPermission(SecurityConstants.AWT.ACCESS_SYSTEM_TRAY_PERMISSION); | ||
| 494 | } | ||
| 495 | } | ||
| 496 | |||
| 497 | private static void initializeSystemTrayIfNeeded() { | ||
| 498 | synchronized (SystemTray.class) { | ||
| 499 | if (systemTray == null) { | ||
| 500 | systemTray = new SystemTray(); | ||
| 501 | } | ||
| 502 | } | ||
| 503 | } | ||
| 504 | } | ||