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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 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 javax.swing; | ||
| 27 | |||
| 28 | import java.awt.Component; | ||
| 29 | import java.awt.Dimension; | ||
| 30 | import java.awt.Graphics; | ||
| 31 | import java.awt.Insets; | ||
| 32 | import java.awt.Point; | ||
| 33 | import java.awt.Rectangle; | ||
| 34 | import java.awt.event.*; | ||
| 35 | import java.beans.Transient; | ||
| 36 | import java.util.Vector; | ||
| 37 | import java.util.Enumeration; | ||
| 38 | |||
| 39 | import java.io.Serializable; | ||
| 40 | import java.io.ObjectOutputStream; | ||
| 41 | import java.io.ObjectInputStream; | ||
| 42 | import java.io.IOException; | ||
| 43 | |||
| 44 | import javax.swing.event.*; | ||
| 45 | import javax.swing.border.Border; | ||
| 46 | import javax.swing.plaf.*; | ||
| 47 | import javax.accessibility.*; | ||
| 48 | |||
| 49 | /** | ||
| 50 | * An implementation of a menu bar. You add <code>JMenu</code> objects to the | ||
| 51 | * menu bar to construct a menu. When the user selects a <code>JMenu</code> | ||
| 52 | * object, its associated <code>JPopupMenu</code> is displayed, allowing the | ||
| 53 | * user to select one of the <code>JMenuItems</code> on it. | ||
| 54 | * <p> | ||
| 55 | * For information and examples of using menu bars see | ||
| 56 | * <a | ||
| 57 | href="http://java.sun.com/docs/books/tutorial/uiswing/components/menu.html">How to Use Menus</a>, | ||
| 58 | * a section in <em>The Java Tutorial.</em> | ||
| 59 | * <p> | ||
| 60 | * <strong>Warning:</strong> Swing is not thread safe. For more | ||
| 61 | * information see <a | ||
| 62 | * href="package-summary.html#threading">Swing's Threading | ||
| 63 | * Policy</a>. | ||
| 64 | * <p> | ||
| 65 | * <strong>Warning:</strong> | ||
| 66 | * Serialized objects of this class will not be compatible with | ||
| 67 | * future Swing releases. The current serialization support is | ||
| 68 | * appropriate for short term storage or RMI between applications running | ||
| 69 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 70 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 71 | * has been added to the <code>java.beans</code> package. | ||
| 72 | * Please see {@link java.beans.XMLEncoder}. | ||
| 73 | * | ||
| 74 | * @beaninfo | ||
| 75 | * attribute: isContainer true | ||
| 76 | * description: A container for holding and displaying menus. | ||
| 77 | * | ||
| 78 | * @author Georges Saab | ||
| 79 | * @author David Karlton | ||
| 80 | * @author Arnaud Weber | ||
| 81 | * @see JMenu | ||
| 82 | * @see JPopupMenu | ||
| 83 | * @see JMenuItem | ||
| 84 | */ | ||
| 85 | public class JMenuBar extends JComponent implements Accessible,MenuElement | ||
| 86 | { | ||
| 87 | /** | ||
| 88 | * @see #getUIClassID | ||
| 89 | * @see #readObject | ||
| 90 | */ | ||
| 91 | private static final String uiClassID = "MenuBarUI"; | ||
| 92 | |||
| 93 | /* | ||
| 94 | * Model for the selected subcontrol. | ||
| 95 | */ | ||
| 96 | private transient SingleSelectionModel selectionModel; | ||
| 97 | |||
| 98 | private boolean paintBorder = true; | ||
| 99 | private Insets margin = null; | ||
| 100 | |||
| 101 | /* diagnostic aids -- should be false for production builds. */ | ||
| 102 | private static final boolean TRACE = false; // trace creates and disposes | ||
| 103 | private static final boolean VERBOSE = false; // show reuse hits/misses | ||
| 104 | private static final boolean DEBUG = false; // show bad params, misc. | ||
| 105 | |||
| 106 | /** | ||
| 107 | * Creates a new menu bar. | ||
| 108 | */ | ||
| 109 | public JMenuBar() { | ||
| 110 | super(); | ||
| 111 | setFocusTraversalKeysEnabled(false); | ||
| 112 | setSelectionModel(new DefaultSingleSelectionModel()); | ||
| 113 | updateUI(); | ||
| 114 | } | ||
| 115 | |||
| 116 | /** | ||
| 117 | * Returns the menubar's current UI. | ||
| 118 | * @see #setUI | ||
| 119 | */ | ||
| 120 | public MenuBarUI getUI() { | ||
| 121 | return (MenuBarUI)ui; | ||
| 122 | } | ||
| 123 | |||
| 124 | /** | ||
| 125 | * Sets the L&F object that renders this component. | ||
| 126 | * | ||
| 127 | * @param ui the new MenuBarUI L&F object | ||
| 128 | * @see UIDefaults#getUI | ||
| 129 | * @beaninfo | ||
| 130 | * bound: true | ||
| 131 | * hidden: true | ||
| 132 | * attribute: visualUpdate true | ||
| 133 | * description: The UI object that implements the Component's LookAndFeel. | ||
| 134 | */ | ||
| 135 | public void setUI(MenuBarUI ui) { | ||
| 136 | super.setUI(ui); | ||
| 137 | } | ||
| 138 | |||
| 139 | /** | ||
| 140 | * Resets the UI property with a value from the current look and feel. | ||
| 141 | * | ||
| 142 | * @see JComponent#updateUI | ||
| 143 | */ | ||
| 144 | public void updateUI() { | ||
| 145 | setUI((MenuBarUI)UIManager.getUI(this)); | ||
| 146 | } | ||
| 147 | |||
| 148 | |||
| 149 | /** | ||
| 150 | * Returns the name of the L&F class that renders this component. | ||
| 151 | * | ||
| 152 | * @return the string "MenuBarUI" | ||
| 153 | * @see JComponent#getUIClassID | ||
| 154 | * @see UIDefaults#getUI | ||
| 155 | */ | ||
| 156 | public String getUIClassID() { | ||
| 157 | return uiClassID; | ||
| 158 | } | ||
| 159 | |||
| 160 | |||
| 161 | /** | ||
| 162 | * Returns the model object that handles single selections. | ||
| 163 | * | ||
| 164 | * @return the <code>SingleSelectionModel</code> property | ||
| 165 | * @see SingleSelectionModel | ||
| 166 | */ | ||
| 167 | public SingleSelectionModel getSelectionModel() { | ||
| 168 | return selectionModel; | ||
| 169 | } | ||
| 170 | |||
| 171 | /** | ||
| 172 | * Sets the model object to handle single selections. | ||
| 173 | * | ||
| 174 | * @param model the <code>SingleSelectionModel</code> to use | ||
| 175 | * @see SingleSelectionModel | ||
| 176 | * @beaninfo | ||
| 177 | * bound: true | ||
| 178 | * description: The selection model, recording which child is selected. | ||
| 179 | */ | ||
| 180 | public void setSelectionModel(SingleSelectionModel model) { | ||
| 181 | SingleSelectionModel oldValue = selectionModel; | ||
| 182 | this.selectionModel = model; | ||
| 183 | firePropertyChange("selectionModel", oldValue, selectionModel); | ||
| 184 | } | ||
| 185 | |||
| 186 | |||
| 187 | /** | ||
| 188 | * Appends the specified menu to the end of the menu bar. | ||
| 189 | * | ||
| 190 | * @param c the <code>JMenu</code> component to add | ||
| 191 | * @return the menu component | ||
| 192 | */ | ||
| 193 | public JMenu add(JMenu c) { | ||
| 194 | super.add(c); | ||
| 195 | return c; | ||
| 196 | } | ||
| 197 | |||
| 198 | /** | ||
| 199 | * Returns the menu at the specified position in the menu bar. | ||
| 200 | * | ||
| 201 | * @param index an integer giving the position in the menu bar, where | ||
| 202 | * 0 is the first position | ||
| 203 | * @return the <code>JMenu</code> at that position, or <code>null</code> if | ||
| 204 | * if there is no <code>JMenu</code> at that position (ie. if | ||
| 205 | * it is a <code>JMenuItem</code>) | ||
| 206 | */ | ||
| 207 | public JMenu getMenu(int index) { | ||
| 208 | Component c = getComponentAtIndex(index); | ||
| 209 | if (c instanceof JMenu) | ||
| 210 | return (JMenu) c; | ||
| 211 | return null; | ||
| 212 | } | ||
| 213 | |||
| 214 | /** | ||
| 215 | * Returns the number of items in the menu bar. | ||
| 216 | * | ||
| 217 | * @return the number of items in the menu bar | ||
| 218 | */ | ||
| 219 | public int getMenuCount() { | ||
| 220 | return getComponentCount(); | ||
| 221 | } | ||
| 222 | |||
| 223 | /** | ||
| 224 | * Sets the help menu that appears when the user selects the | ||
| 225 | * "help" option in the menu bar. This method is not yet implemented | ||
| 226 | * and will throw an exception. | ||
| 227 | * | ||
| 228 | * @param menu the JMenu that delivers help to the user | ||
| 229 | */ | ||
| 230 | public void setHelpMenu(JMenu menu) { | ||
| 231 | throw new Error("setHelpMenu() not yet implemented."); | ||
| 232 | } | ||
| 233 | |||
| 234 | /** | ||
| 235 | * Gets the help menu for the menu bar. This method is not yet | ||
| 236 | * implemented and will throw an exception. | ||
| 237 | * | ||
| 238 | * @return the <code>JMenu</code> that delivers help to the user | ||
| 239 | */ | ||
| 240 | @Transient | ||
| 241 | public JMenu getHelpMenu() { | ||
| 242 | throw new Error("getHelpMenu() not yet implemented."); | ||
| 243 | } | ||
| 244 | |||
| 245 | /** | ||
| 246 | * Returns the component at the specified index. | ||
| 247 | * | ||
| 248 | * @param i an integer specifying the position, where 0 is first | ||
| 249 | * @return the <code>Component</code> at the position, | ||
| 250 | * or <code>null</code> for an invalid index | ||
| 251 | * @deprecated replaced by <code>getComponent(int i)</code> | ||
| 252 | */ | ||
| 253 | @Deprecated | ||
| 254 | public Component getComponentAtIndex(int i) { | ||
| 255 | if(i < 0 || i >= getComponentCount()) { | ||
| 256 | return null; | ||
| 257 | } | ||
| 258 | return getComponent(i); | ||
| 259 | } | ||
| 260 | |||
| 261 | /** | ||
| 262 | * Returns the index of the specified component. | ||
| 263 | * | ||
| 264 | * @param c the <code>Component</code> to find | ||
| 265 | * @return an integer giving the component's position, where 0 is first; | ||
| 266 | * or -1 if it can't be found | ||
| 267 | */ | ||
| 268 | public int getComponentIndex(Component c) { | ||
| 269 | int ncomponents = this.getComponentCount(); | ||
| 270 | Component[] component = this.getComponents(); | ||
| 271 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 272 | Component comp = component[i]; | ||
| 273 | if (comp == c) | ||
| 274 | return i; | ||
| 275 | } | ||
| 276 | return -1; | ||
| 277 | } | ||
| 278 | |||
| 279 | /** | ||
| 280 | * Sets the currently selected component, producing a | ||
| 281 | * a change to the selection model. | ||
| 282 | * | ||
| 283 | * @param sel the <code>Component</code> to select | ||
| 284 | */ | ||
| 285 | public void setSelected(Component sel) { | ||
| 286 | SingleSelectionModel model = getSelectionModel(); | ||
| 287 | int index = getComponentIndex(sel); | ||
| 288 | model.setSelectedIndex(index); | ||
| 289 | } | ||
| 290 | |||
| 291 | /** | ||
| 292 | * Returns true if the menu bar currently has a component selected. | ||
| 293 | * | ||
| 294 | * @return true if a selection has been made, else false | ||
| 295 | */ | ||
| 296 | public boolean isSelected() { | ||
| 297 | return selectionModel.isSelected(); | ||
| 298 | } | ||
| 299 | |||
| 300 | /** | ||
| 301 | * Returns true if the menu bars border should be painted. | ||
| 302 | * | ||
| 303 | * @return true if the border should be painted, else false | ||
| 304 | */ | ||
| 305 | public boolean isBorderPainted() { | ||
| 306 | return paintBorder; | ||
| 307 | } | ||
| 308 | |||
| 309 | /** | ||
| 310 | * Sets whether the border should be painted. | ||
| 311 | * | ||
| 312 | * @param b if true and border property is not <code>null</code>, | ||
| 313 | * the border is painted. | ||
| 314 | * @see #isBorderPainted | ||
| 315 | * @beaninfo | ||
| 316 | * bound: true | ||
| 317 | * attribute: visualUpdate true | ||
| 318 | * description: Whether the border should be painted. | ||
| 319 | */ | ||
| 320 | public void setBorderPainted(boolean b) { | ||
| 321 | boolean oldValue = paintBorder; | ||
| 322 | paintBorder = b; | ||
| 323 | firePropertyChange("borderPainted", oldValue, paintBorder); | ||
| 324 | if (b != oldValue) { | ||
| 325 | revalidate(); | ||
| 326 | repaint(); | ||
| 327 | } | ||
| 328 | } | ||
| 329 | |||
| 330 | /** | ||
| 331 | * Paints the menubar's border if <code>BorderPainted</code> | ||
| 332 | * property is true. | ||
| 333 | * | ||
| 334 | * @param g the <code>Graphics</code> context to use for painting | ||
| 335 | * @see JComponent#paint | ||
| 336 | * @see JComponent#setBorder | ||
| 337 | */ | ||
| 338 | protected void paintBorder(Graphics g) { | ||
| 339 | if (isBorderPainted()) { | ||
| 340 | super.paintBorder(g); | ||
| 341 | } | ||
| 342 | } | ||
| 343 | |||
| 344 | /** | ||
| 345 | * Sets the margin between the menubar's border and | ||
| 346 | * its menus. Setting to <code>null</code> will cause the menubar to | ||
| 347 | * use the default margins. | ||
| 348 | * | ||
| 349 | * @param m an Insets object containing the margin values | ||
| 350 | * @see Insets | ||
| 351 | * @beaninfo | ||
| 352 | * bound: true | ||
| 353 | * attribute: visualUpdate true | ||
| 354 | * description: The space between the menubar's border and its contents | ||
| 355 | */ | ||
| 356 | public void setMargin(Insets m) { | ||
| 357 | Insets old = margin; | ||
| 358 | this.margin = m; | ||
| 359 | firePropertyChange("margin", old, m); | ||
| 360 | if (old == null || !old.equals(m)) { | ||
| 361 | revalidate(); | ||
| 362 | repaint(); | ||
| 363 | } | ||
| 364 | } | ||
| 365 | |||
| 366 | /** | ||
| 367 | * Returns the margin between the menubar's border and | ||
| 368 | * its menus. If there is no previous margin, it will create | ||
| 369 | * a default margin with zero size. | ||
| 370 | * | ||
| 371 | * @return an <code>Insets</code> object containing the margin values | ||
| 372 | * @see Insets | ||
| 373 | */ | ||
| 374 | public Insets getMargin() { | ||
| 375 | if(margin == null) { | ||
| 376 | return new Insets(0,0,0,0); | ||
| 377 | } else { | ||
| 378 | return margin; | ||
| 379 | } | ||
| 380 | } | ||
| 381 | |||
| 382 | |||
| 383 | /** | ||
| 384 | * Implemented to be a <code>MenuElement</code> -- does nothing. | ||
| 385 | * | ||
| 386 | * @see #getSubElements | ||
| 387 | */ | ||
| 388 | public void processMouseEvent(MouseEvent event,MenuElement path[],MenuSelectionManager manager) { | ||
| 389 | } | ||
| 390 | |||
| 391 | /** | ||
| 392 | * Implemented to be a <code>MenuElement</code> -- does nothing. | ||
| 393 | * | ||
| 394 | * @see #getSubElements | ||
| 395 | */ | ||
| 396 | public void processKeyEvent(KeyEvent e,MenuElement path[],MenuSelectionManager manager) { | ||
| 397 | } | ||
| 398 | |||
| 399 | /** | ||
| 400 | * Implemented to be a <code>MenuElement</code> -- does nothing. | ||
| 401 | * | ||
| 402 | * @see #getSubElements | ||
| 403 | */ | ||
| 404 | public void menuSelectionChanged(boolean isIncluded) { | ||
| 405 | } | ||
| 406 | |||
| 407 | /** | ||
| 408 | * Implemented to be a <code>MenuElement</code> -- returns the | ||
| 409 | * menus in this menu bar. | ||
| 410 | * This is the reason for implementing the <code>MenuElement</code> | ||
| 411 | * interface -- so that the menu bar can be treated the same as | ||
| 412 | * other menu elements. | ||
| 413 | * @return an array of menu items in the menu bar. | ||
| 414 | */ | ||
| 415 | public MenuElement[] getSubElements() { | ||
| 416 | MenuElement result[]; | ||
| 417 | Vector<MenuElement> tmp = new Vector<MenuElement>(); | ||
| 418 | int c = getComponentCount(); | ||
| 419 | int i; | ||
| 420 | Component m; | ||
| 421 | |||
| 422 | for(i=0 ; i < c ; i++) { | ||
| 423 | m = getComponent(i); | ||
| 424 | if(m instanceof MenuElement) | ||
| 425 | tmp.addElement((MenuElement) m); | ||
| 426 | } | ||
| 427 | |||
| 428 | result = new MenuElement[tmp.size()]; | ||
| 429 | for(i=0,c=tmp.size() ; i < c ; i++) | ||
| 430 | result[i] = tmp.elementAt(i); | ||
| 431 | return result; | ||
| 432 | } | ||
| 433 | |||
| 434 | /** | ||
| 435 | * Implemented to be a <code>MenuElement</code>. Returns this object. | ||
| 436 | * | ||
| 437 | * @return the current <code>Component</code> (this) | ||
| 438 | * @see #getSubElements | ||
| 439 | */ | ||
| 440 | public Component getComponent() { | ||
| 441 | return this; | ||
| 442 | } | ||
| 443 | |||
| 444 | |||
| 445 | /** | ||
| 446 | * Returns a string representation of this <code>JMenuBar</code>. | ||
| 447 | * This method | ||
| 448 | * is intended to be used only for debugging purposes, and the | ||
| 449 | * content and format of the returned string may vary between | ||
| 450 | * implementations. The returned string may be empty but may not | ||
| 451 | * be <code>null</code>. | ||
| 452 | * | ||
| 453 | * @return a string representation of this <code>JMenuBar</code> | ||
| 454 | */ | ||
| 455 | protected String paramString() { | ||
| 456 | String paintBorderString = (paintBorder ? | ||
| 457 | "true" : "false"); | ||
| 458 | String marginString = (margin != null ? | ||
| 459 | margin.toString() : ""); | ||
| 460 | |||
| 461 | return super.paramString() + | ||
| 462 | ",margin=" + marginString + | ||
| 463 | ",paintBorder=" + paintBorderString; | ||
| 464 | } | ||
| 465 | |||
| 466 | ///////////////// | ||
| 467 | // Accessibility support | ||
| 468 | //////////////// | ||
| 469 | |||
| 470 | /** | ||
| 471 | * Gets the AccessibleContext associated with this JMenuBar. | ||
| 472 | * For JMenuBars, the AccessibleContext takes the form of an | ||
| 473 | * AccessibleJMenuBar. | ||
| 474 | * A new AccessibleJMenuBar instance is created if necessary. | ||
| 475 | * | ||
| 476 | * @return an AccessibleJMenuBar that serves as the | ||
| 477 | * AccessibleContext of this JMenuBar | ||
| 478 | */ | ||
| 479 | public AccessibleContext getAccessibleContext() { | ||
| 480 | if (accessibleContext == null) { | ||
| 481 | accessibleContext = new AccessibleJMenuBar(); | ||
| 482 | } | ||
| 483 | return accessibleContext; | ||
| 484 | } | ||
| 485 | |||
| 486 | /** | ||
| 487 | * This class implements accessibility support for the | ||
| 488 | * <code>JMenuBar</code> class. It provides an implementation of the | ||
| 489 | * Java Accessibility API appropriate to menu bar user-interface | ||
| 490 | * elements. | ||
| 491 | * <p> | ||
| 492 | * <strong>Warning:</strong> | ||
| 493 | * Serialized objects of this class will not be compatible with | ||
| 494 | * future Swing releases. The current serialization support is | ||
| 495 | * appropriate for short term storage or RMI between applications running | ||
| 496 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 497 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 498 | * has been added to the <code>java.beans</code> package. | ||
| 499 | * Please see {@link java.beans.XMLEncoder}. | ||
| 500 | */ | ||
| 501 | protected class AccessibleJMenuBar extends AccessibleJComponent | ||
| 502 | implements AccessibleSelection { | ||
| 503 | |||
| 504 | /** | ||
| 505 | * Get the accessible state set of this object. | ||
| 506 | * | ||
| 507 | * @return an instance of AccessibleState containing the current state | ||
| 508 | * of the object | ||
| 509 | */ | ||
| 510 | public AccessibleStateSet getAccessibleStateSet() { | ||
| 511 | AccessibleStateSet states = super.getAccessibleStateSet(); | ||
| 512 | return states; | ||
| 513 | } | ||
| 514 | |||
| 515 | /** | ||
| 516 | * Get the role of this object. | ||
| 517 | * | ||
| 518 | * @return an instance of AccessibleRole describing the role of the | ||
| 519 | * object | ||
| 520 | */ | ||
| 521 | public AccessibleRole getAccessibleRole() { | ||
| 522 | return AccessibleRole.MENU_BAR; | ||
| 523 | } | ||
| 524 | |||
| 525 | /** | ||
| 526 | * Get the AccessibleSelection associated with this object. In the | ||
| 527 | * implementation of the Java Accessibility API for this class, | ||
| 528 | * return this object, which is responsible for implementing the | ||
| 529 | * AccessibleSelection interface on behalf of itself. | ||
| 530 | * | ||
| 531 | * @return this object | ||
| 532 | */ | ||
| 533 | public AccessibleSelection getAccessibleSelection() { | ||
| 534 | return this; | ||
| 535 | } | ||
| 536 | |||
| 537 | /** | ||
| 538 | * Returns 1 if a menu is currently selected in this menu bar. | ||
| 539 | * | ||
| 540 | * @return 1 if a menu is currently selected, else 0 | ||
| 541 | */ | ||
| 542 | public int getAccessibleSelectionCount() { | ||
| 543 | if (isSelected()) { | ||
| 544 | return 1; | ||
| 545 | } else { | ||
| 546 | return 0; | ||
| 547 | } | ||
| 548 | } | ||
| 549 | |||
| 550 | /** | ||
| 551 | * Returns the currently selected menu if one is selected, | ||
| 552 | * otherwise null. | ||
| 553 | */ | ||
| 554 | public Accessible getAccessibleSelection(int i) { | ||
| 555 | if (isSelected()) { | ||
| 556 | if (i != 0) { // single selection model for JMenuBar | ||
| 557 | return null; | ||
| 558 | } | ||
| 559 | int j = getSelectionModel().getSelectedIndex(); | ||
| 560 | if (getComponentAtIndex(j) instanceof Accessible) { | ||
| 561 | return (Accessible) getComponentAtIndex(j); | ||
| 562 | } | ||
| 563 | } | ||
| 564 | return null; | ||
| 565 | } | ||
| 566 | |||
| 567 | /** | ||
| 568 | * Returns true if the current child of this object is selected. | ||
| 569 | * | ||
| 570 | * @param i the zero-based index of the child in this Accessible | ||
| 571 | * object. | ||
| 572 | * @see AccessibleContext#getAccessibleChild | ||
| 573 | */ | ||
| 574 | public boolean isAccessibleChildSelected(int i) { | ||
| 575 | return (i == getSelectionModel().getSelectedIndex()); | ||
| 576 | } | ||
| 577 | |||
| 578 | /** | ||
| 579 | * Selects the nth menu in the menu bar, forcing it to | ||
| 580 | * pop up. If another menu is popped up, this will force | ||
| 581 | * it to close. If the nth menu is already selected, this | ||
| 582 | * method has no effect. | ||
| 583 | * | ||
| 584 | * @param i the zero-based index of selectable items | ||
| 585 | * @see #getAccessibleStateSet | ||
| 586 | */ | ||
| 587 | public void addAccessibleSelection(int i) { | ||
| 588 | // first close up any open menu | ||
| 589 | int j = getSelectionModel().getSelectedIndex(); | ||
| 590 | if (i == j) { | ||
| 591 | return; | ||
| 592 | } | ||
| 593 | if (j >= 0 && j < getMenuCount()) { | ||
| 594 | JMenu menu = getMenu(j); | ||
| 595 | if (menu != null) { | ||
| 596 | MenuSelectionManager.defaultManager().setSelectedPath(null); | ||
| 597 | // menu.setPopupMenuVisible(false); | ||
| 598 | } | ||
| 599 | } | ||
| 600 | // now popup the new menu | ||
| 601 | getSelectionModel().setSelectedIndex(i); | ||
| 602 | JMenu menu = getMenu(i); | ||
| 603 | if (menu != null) { | ||
| 604 | MenuElement me[] = new MenuElement[3]; | ||
| 605 | me[0] = JMenuBar.this; | ||
| 606 | me[1] = menu; | ||
| 607 | me[2] = menu.getPopupMenu(); | ||
| 608 | MenuSelectionManager.defaultManager().setSelectedPath(me); | ||
| 609 | // menu.setPopupMenuVisible(true); | ||
| 610 | } | ||
| 611 | } | ||
| 612 | |||
| 613 | /** | ||
| 614 | * Removes the nth selected item in the object from the object's | ||
| 615 | * selection. If the nth item isn't currently selected, this | ||
| 616 | * method has no effect. Otherwise, it closes the popup menu. | ||
| 617 | * | ||
| 618 | * @param i the zero-based index of selectable items | ||
| 619 | */ | ||
| 620 | public void removeAccessibleSelection(int i) { | ||
| 621 | if (i >= 0 && i < getMenuCount()) { | ||
| 622 | JMenu menu = getMenu(i); | ||
| 623 | if (menu != null) { | ||
| 624 | MenuSelectionManager.defaultManager().setSelectedPath(null); | ||
| 625 | // menu.setPopupMenuVisible(false); | ||
| 626 | } | ||
| 627 | getSelectionModel().setSelectedIndex(-1); | ||
| 628 | } | ||
| 629 | } | ||
| 630 | |||
| 631 | /** | ||
| 632 | * Clears the selection in the object, so that nothing in the | ||
| 633 | * object is selected. This will close any open menu. | ||
| 634 | */ | ||
| 635 | public void clearAccessibleSelection() { | ||
| 636 | int i = getSelectionModel().getSelectedIndex(); | ||
| 637 | if (i >= 0 && i < getMenuCount()) { | ||
| 638 | JMenu menu = getMenu(i); | ||
| 639 | if (menu != null) { | ||
| 640 | MenuSelectionManager.defaultManager().setSelectedPath(null); | ||
| 641 | // menu.setPopupMenuVisible(false); | ||
| 642 | } | ||
| 643 | } | ||
| 644 | getSelectionModel().setSelectedIndex(-1); | ||
| 645 | } | ||
| 646 | |||
| 647 | /** | ||
| 648 | * Normally causes every selected item in the object to be selected | ||
| 649 | * if the object supports multiple selections. This method | ||
| 650 | * makes no sense in a menu bar, and so does nothing. | ||
| 651 | */ | ||
| 652 | public void selectAllAccessibleSelection() { | ||
| 653 | } | ||
| 654 | } // internal class AccessibleJMenuBar | ||
| 655 | |||
| 656 | |||
| 657 | /** | ||
| 658 | * Subclassed to check all the child menus. | ||
| 659 | * @since 1.3 | ||
| 660 | */ | ||
| 661 | protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, | ||
| 662 | int condition, boolean pressed) { | ||
| 663 | // See if we have a local binding. | ||
| 664 | boolean retValue = super.processKeyBinding(ks, e, condition, pressed); | ||
| 665 | if (!retValue) { | ||
| 666 | MenuElement[] subElements = getSubElements(); | ||
| 667 | for (MenuElement subElement : subElements) { | ||
| 668 | if (processBindingForKeyStrokeRecursive( | ||
| 669 | subElement, ks, e, condition, pressed)) { | ||
| 670 | return true; | ||
| 671 | } | ||
| 672 | } | ||
| 673 | } | ||
| 674 | return retValue; | ||
| 675 | } | ||
| 676 | |||
| 677 | static boolean processBindingForKeyStrokeRecursive(MenuElement elem, | ||
| 678 | KeyStroke ks, KeyEvent e, int condition, boolean pressed) { | ||
| 679 | if (elem == null) { | ||
| 680 | return false; | ||
| 681 | } | ||
| 682 | |||
| 683 | Component c = elem.getComponent(); | ||
| 684 | |||
| 685 | if ( !(c.isVisible() || (c instanceof JPopupMenu)) || !c.isEnabled() ) { | ||
| 686 | return false; | ||
| 687 | } | ||
| 688 | |||
| 689 | if (c != null && c instanceof JComponent && | ||
| 690 | ((JComponent)c).processKeyBinding(ks, e, condition, pressed)) { | ||
| 691 | |||
| 692 | return true; | ||
| 693 | } | ||
| 694 | |||
| 695 | MenuElement[] subElements = elem.getSubElements(); | ||
| 696 | for (MenuElement subElement : subElements) { | ||
| 697 | if (processBindingForKeyStrokeRecursive(subElement, ks, e, condition, pressed)) { | ||
| 698 | return true; | ||
| 699 | // We don't, pass along to children JMenu's | ||
| 700 | } | ||
| 701 | } | ||
| 702 | return false; | ||
| 703 | } | ||
| 704 | |||
| 705 | /** | ||
| 706 | * Overrides <code>JComponent.addNotify</code> to register this | ||
| 707 | * menu bar with the current keyboard manager. | ||
| 708 | */ | ||
| 709 | public void addNotify() { | ||
| 710 | super.addNotify(); | ||
| 711 | KeyboardManager.getCurrentManager().registerMenuBar(this); | ||
| 712 | } | ||
| 713 | |||
| 714 | /** | ||
| 715 | * Overrides <code>JComponent.removeNotify</code> to unregister this | ||
| 716 | * menu bar with the current keyboard manager. | ||
| 717 | */ | ||
| 718 | public void removeNotify() { | ||
| 719 | super.removeNotify(); | ||
| 720 | KeyboardManager.getCurrentManager().unregisterMenuBar(this); | ||
| 721 | } | ||
| 722 | |||
| 723 | |||
| 724 | private void writeObject(ObjectOutputStream s) throws IOException { | ||
| 725 | s.defaultWriteObject(); | ||
| 726 | if (getUIClassID().equals(uiClassID)) { | ||
| 727 | byte count = JComponent.getWriteObjCounter(this); | ||
| 728 | JComponent.setWriteObjCounter(this, --count); | ||
| 729 | if (count == 0 && ui != null) { | ||
| 730 | ui.installUI(this); | ||
| 731 | } | ||
| 732 | } | ||
| 733 | |||
| 734 | Object[] kvData = new Object[4]; | ||
| 735 | int n = 0; | ||
| 736 | |||
| 737 | if (selectionModel instanceof Serializable) { | ||
| 738 | kvData[n++] = "selectionModel"; | ||
| 739 | kvData[n++] = selectionModel; | ||
| 740 | } | ||
| 741 | |||
| 742 | s.writeObject(kvData); | ||
| 743 | } | ||
| 744 | |||
| 745 | |||
| 746 | /** | ||
| 747 | * See JComponent.readObject() for information about serialization | ||
| 748 | * in Swing. | ||
| 749 | */ | ||
| 750 | private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException | ||
| 751 | { | ||
| 752 | s.defaultReadObject(); | ||
| 753 | Object[] kvData = (Object[])(s.readObject()); | ||
| 754 | |||
| 755 | for(int i = 0; i < kvData.length; i += 2) { | ||
| 756 | if (kvData[i] == null) { | ||
| 757 | break; | ||
| 758 | } | ||
| 759 | else if (kvData[i].equals("selectionModel")) { | ||
| 760 | selectionModel = (SingleSelectionModel)kvData[i + 1]; | ||
| 761 | } | ||
| 762 | } | ||
| 763 | |||
| 764 | } | ||
| 765 | } | ||