J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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.util.Vector; |
| 36 | import java.util.Enumeration; |
| 37 | |
| 38 | import java.io.Serializable; |
| 39 | import java.io.ObjectOutputStream; |
| 40 | import java.io.ObjectInputStream; |
| 41 | import java.io.IOException; |
| 42 | |
| 43 | import javax.swing.event.*; |
| 44 | import javax.swing.border.Border; |
| 45 | import javax.swing.plaf.*; |
| 46 | import javax.accessibility.*; |
| 47 | |
| 48 | /** |
| 49 | * An implementation of a menu bar. You add <code>JMenu</code> objects to the |
| 50 | * menu bar to construct a menu. When the user selects a <code>JMenu</code> |
| 51 | * object, its associated <code>JPopupMenu</code> is displayed, allowing the |
| 52 | * user to select one of the <code>JMenuItems</code> on it. |
| 53 | * <p> |
| 54 | * For information and examples of using menu bars see |
| 55 | * <a |
| 56 | href="http://java.sun.com/docs/books/tutorial/uiswing/components/menu.html">How to Use Menus</a>, |
| 57 | * a section in <em>The Java Tutorial.</em> |
| 58 | * <p> |
| 59 | * <strong>Warning:</strong> Swing is not thread safe. For more |
| 60 | * information see <a |
| 61 | * href="package-summary.html#threading">Swing's Threading |
| 62 | * Policy</a>. |
| 63 | * <p> |
| 64 | * <strong>Warning:</strong> |
| 65 | * Serialized objects of this class will not be compatible with |
| 66 | * future Swing releases. The current serialization support is |
| 67 | * appropriate for short term storage or RMI between applications running |
| 68 | * the same version of Swing. As of 1.4, support for long term storage |
| 69 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 70 | * has been added to the <code>java.beans</code> package. |
| 71 | * Please see {@link java.beans.XMLEncoder}. |
| 72 | * |
| 73 | * @beaninfo |
| 74 | * attribute: isContainer true |
| 75 | * description: A container for holding and displaying menus. |
| 76 | * |
| 77 | * @author Georges Saab |
| 78 | * @author David Karlton |
| 79 | * @author Arnaud Weber |
| 80 | * @see JMenu |
| 81 | * @see JPopupMenu |
| 82 | * @see JMenuItem |
| 83 | */ |
| 84 | public class JMenuBar extends JComponent implements Accessible,MenuElement |
| 85 | { |
| 86 | /** |
| 87 | * @see #getUIClassID |
| 88 | * @see #readObject |
| 89 | */ |
| 90 | private static final String uiClassID = "MenuBarUI"; |
| 91 | |
| 92 | /* |
| 93 | * Model for the selected subcontrol. |
| 94 | */ |
| 95 | private transient SingleSelectionModel selectionModel; |
| 96 | |
| 97 | private boolean paintBorder = true; |
| 98 | private Insets margin = null; |
| 99 | |
| 100 | /* diagnostic aids -- should be false for production builds. */ |
| 101 | private static final boolean TRACE = false; // trace creates and disposes |
| 102 | private static final boolean VERBOSE = false; // show reuse hits/misses |
| 103 | private static final boolean DEBUG = false; // show bad params, misc. |
| 104 | |
| 105 | /** |
| 106 | * Creates a new menu bar. |
| 107 | */ |
| 108 | public JMenuBar() { |
| 109 | super(); |
| 110 | setFocusTraversalKeysEnabled(false); |
| 111 | setSelectionModel(new DefaultSingleSelectionModel()); |
| 112 | updateUI(); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Returns the menubar's current UI. |
| 117 | * @see #setUI |
| 118 | */ |
| 119 | public MenuBarUI getUI() { |
| 120 | return (MenuBarUI)ui; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Sets the L&F object that renders this component. |
| 125 | * |
| 126 | * @param ui the new MenuBarUI L&F object |
| 127 | * @see UIDefaults#getUI |
| 128 | * @beaninfo |
| 129 | * bound: true |
| 130 | * hidden: true |
| 131 | * attribute: visualUpdate true |
| 132 | * description: The UI object that implements the Component's LookAndFeel. |
| 133 | */ |
| 134 | public void setUI(MenuBarUI ui) { |
| 135 | super.setUI(ui); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Resets the UI property with a value from the current look and feel. |
| 140 | * |
| 141 | * @see JComponent#updateUI |
| 142 | */ |
| 143 | public void updateUI() { |
| 144 | setUI((MenuBarUI)UIManager.getUI(this)); |
| 145 | } |
| 146 | |
| 147 | |
| 148 | /** |
| 149 | * Returns the name of the L&F class that renders this component. |
| 150 | * |
| 151 | * @return the string "MenuBarUI" |
| 152 | * @see JComponent#getUIClassID |
| 153 | * @see UIDefaults#getUI |
| 154 | */ |
| 155 | public String getUIClassID() { |
| 156 | return uiClassID; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /** |
| 161 | * Returns the model object that handles single selections. |
| 162 | * |
| 163 | * @return the <code>SingleSelectionModel</code> property |
| 164 | * @see SingleSelectionModel |
| 165 | */ |
| 166 | public SingleSelectionModel getSelectionModel() { |
| 167 | return selectionModel; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Sets the model object to handle single selections. |
| 172 | * |
| 173 | * @param model the <code>SingleSelectionModel</code> to use |
| 174 | * @see SingleSelectionModel |
| 175 | * @beaninfo |
| 176 | * bound: true |
| 177 | * description: The selection model, recording which child is selected. |
| 178 | */ |
| 179 | public void setSelectionModel(SingleSelectionModel model) { |
| 180 | SingleSelectionModel oldValue = selectionModel; |
| 181 | this.selectionModel = model; |
| 182 | firePropertyChange("selectionModel", oldValue, selectionModel); |
| 183 | } |
| 184 | |
| 185 | |
| 186 | /** |
| 187 | * Appends the specified menu to the end of the menu bar. |
| 188 | * |
| 189 | * @param c the <code>JMenu</code> component to add |
| 190 | * @return the menu component |
| 191 | */ |
| 192 | public JMenu add(JMenu c) { |
| 193 | super.add(c); |
| 194 | return c; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Returns the menu at the specified position in the menu bar. |
| 199 | * |
| 200 | * @param index an integer giving the position in the menu bar, where |
| 201 | * 0 is the first position |
| 202 | * @return the <code>JMenu</code> at that position, or <code>null</code> if |
| 203 | * if there is no <code>JMenu</code> at that position (ie. if |
| 204 | * it is a <code>JMenuItem</code>) |
| 205 | */ |
| 206 | public JMenu getMenu(int index) { |
| 207 | Component c = getComponentAtIndex(index); |
| 208 | if (c instanceof JMenu) |
| 209 | return (JMenu) c; |
| 210 | return null; |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * Returns the number of items in the menu bar. |
| 215 | * |
| 216 | * @return the number of items in the menu bar |
| 217 | */ |
| 218 | public int getMenuCount() { |
| 219 | return getComponentCount(); |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Sets the help menu that appears when the user selects the |
| 224 | * "help" option in the menu bar. This method is not yet implemented |
| 225 | * and will throw an exception. |
| 226 | * |
| 227 | * @param menu the JMenu that delivers help to the user |
| 228 | */ |
| 229 | public void setHelpMenu(JMenu menu) { |
| 230 | throw new Error("setHelpMenu() not yet implemented."); |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Gets the help menu for the menu bar. This method is not yet |
| 235 | * implemented and will throw an exception. |
| 236 | * |
| 237 | * @return the <code>JMenu</code> that delivers help to the user |
| 238 | */ |
| 239 | public JMenu getHelpMenu() { |
| 240 | throw new Error("getHelpMenu() not yet implemented."); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Returns the component at the specified index. |
| 245 | * |
| 246 | * @param i an integer specifying the position, where 0 is first |
| 247 | * @return the <code>Component</code> at the position, |
| 248 | * or <code>null</code> for an invalid index |
| 249 | * @deprecated replaced by <code>getComponent(int i)</code> |
| 250 | */ |
| 251 | @Deprecated |
| 252 | public Component getComponentAtIndex(int i) { |
| 253 | if(i < 0 || i >= getComponentCount()) { |
| 254 | return null; |
| 255 | } |
| 256 | return getComponent(i); |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Returns the index of the specified component. |
| 261 | * |
| 262 | * @param c the <code>Component</code> to find |
| 263 | * @return an integer giving the component's position, where 0 is first; |
| 264 | * or -1 if it can't be found |
| 265 | */ |
| 266 | public int getComponentIndex(Component c) { |
| 267 | int ncomponents = this.getComponentCount(); |
| 268 | Component[] component = this.getComponents(); |
| 269 | for (int i = 0 ; i < ncomponents ; i++) { |
| 270 | Component comp = component[i]; |
| 271 | if (comp == c) |
| 272 | return i; |
| 273 | } |
| 274 | return -1; |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Sets the currently selected component, producing a |
| 279 | * a change to the selection model. |
| 280 | * |
| 281 | * @param sel the <code>Component</code> to select |
| 282 | */ |
| 283 | public void setSelected(Component sel) { |
| 284 | SingleSelectionModel model = getSelectionModel(); |
| 285 | int index = getComponentIndex(sel); |
| 286 | model.setSelectedIndex(index); |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Returns true if the menu bar currently has a component selected. |
| 291 | * |
| 292 | * @return true if a selection has been made, else false |
| 293 | */ |
| 294 | public boolean isSelected() { |
| 295 | return selectionModel.isSelected(); |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Returns true if the menu bars border should be painted. |
| 300 | * |
| 301 | * @return true if the border should be painted, else false |
| 302 | */ |
| 303 | public boolean isBorderPainted() { |
| 304 | return paintBorder; |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * Sets whether the border should be painted. |
| 309 | * |
| 310 | * @param b if true and border property is not <code>null</code>, |
| 311 | * the border is painted. |
| 312 | * @see #isBorderPainted |
| 313 | * @beaninfo |
| 314 | * bound: true |
| 315 | * attribute: visualUpdate true |
| 316 | * description: Whether the border should be painted. |
| 317 | */ |
| 318 | public void setBorderPainted(boolean b) { |
| 319 | boolean oldValue = paintBorder; |
| 320 | paintBorder = b; |
| 321 | firePropertyChange("borderPainted", oldValue, paintBorder); |
| 322 | if (b != oldValue) { |
| 323 | revalidate(); |
| 324 | repaint(); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | /** |
| 329 | * Paints the menubar's border if <code>BorderPainted</code> |
| 330 | * property is true. |
| 331 | * |
| 332 | * @param g the <code>Graphics</code> context to use for painting |
| 333 | * @see JComponent#paint |
| 334 | * @see JComponent#setBorder |
| 335 | */ |
| 336 | protected void paintBorder(Graphics g) { |
| 337 | if (isBorderPainted()) { |
| 338 | super.paintBorder(g); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Sets the margin between the menubar's border and |
| 344 | * its menus. Setting to <code>null</code> will cause the menubar to |
| 345 | * use the default margins. |
| 346 | * |
| 347 | * @param m an Insets object containing the margin values |
| 348 | * @see Insets |
| 349 | * @beaninfo |
| 350 | * bound: true |
| 351 | * attribute: visualUpdate true |
| 352 | * description: The space between the menubar's border and its contents |
| 353 | */ |
| 354 | public void setMargin(Insets m) { |
| 355 | Insets old = margin; |
| 356 | this.margin = m; |
| 357 | firePropertyChange("margin", old, m); |
| 358 | if (old == null || !old.equals(m)) { |
| 359 | revalidate(); |
| 360 | repaint(); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * Returns the margin between the menubar's border and |
| 366 | * its menus. If there is no previous margin, it will create |
| 367 | * a default margin with zero size. |
| 368 | * |
| 369 | * @return an <code>Insets</code> object containing the margin values |
| 370 | * @see Insets |
| 371 | */ |
| 372 | public Insets getMargin() { |
| 373 | if(margin == null) { |
| 374 | return new Insets(0,0,0,0); |
| 375 | } else { |
| 376 | return margin; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | |
| 381 | /** |
| 382 | * Implemented to be a <code>MenuElement</code> -- does nothing. |
| 383 | * |
| 384 | * @see #getSubElements |
| 385 | */ |
| 386 | public void processMouseEvent(MouseEvent event,MenuElement path[],MenuSelectionManager manager) { |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * Implemented to be a <code>MenuElement</code> -- does nothing. |
| 391 | * |
| 392 | * @see #getSubElements |
| 393 | */ |
| 394 | public void processKeyEvent(KeyEvent e,MenuElement path[],MenuSelectionManager manager) { |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Implemented to be a <code>MenuElement</code> -- does nothing. |
| 399 | * |
| 400 | * @see #getSubElements |
| 401 | */ |
| 402 | public void menuSelectionChanged(boolean isIncluded) { |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * Implemented to be a <code>MenuElement</code> -- returns the |
| 407 | * menus in this menu bar. |
| 408 | * This is the reason for implementing the <code>MenuElement</code> |
| 409 | * interface -- so that the menu bar can be treated the same as |
| 410 | * other menu elements. |
| 411 | * @return an array of menu items in the menu bar. |
| 412 | */ |
| 413 | public MenuElement[] getSubElements() { |
| 414 | MenuElement result[]; |
| 415 | Vector tmp = new Vector(); |
| 416 | int c = getComponentCount(); |
| 417 | int i; |
| 418 | Component m; |
| 419 | |
| 420 | for(i=0 ; i < c ; i++) { |
| 421 | m = getComponent(i); |
| 422 | if(m instanceof MenuElement) |
| 423 | tmp.addElement(m); |
| 424 | } |
| 425 | |
| 426 | result = new MenuElement[tmp.size()]; |
| 427 | for(i=0,c=tmp.size() ; i < c ; i++) |
| 428 | result[i] = (MenuElement) tmp.elementAt(i); |
| 429 | return result; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Implemented to be a <code>MenuElement</code>. Returns this object. |
| 434 | * |
| 435 | * @return the current <code>Component</code> (this) |
| 436 | * @see #getSubElements |
| 437 | */ |
| 438 | public Component getComponent() { |
| 439 | return this; |
| 440 | } |
| 441 | |
| 442 | |
| 443 | /** |
| 444 | * Returns a string representation of this <code>JMenuBar</code>. |
| 445 | * This method |
| 446 | * is intended to be used only for debugging purposes, and the |
| 447 | * content and format of the returned string may vary between |
| 448 | * implementations. The returned string may be empty but may not |
| 449 | * be <code>null</code>. |
| 450 | * |
| 451 | * @return a string representation of this <code>JMenuBar</code> |
| 452 | */ |
| 453 | protected String paramString() { |
| 454 | String paintBorderString = (paintBorder ? |
| 455 | "true" : "false"); |
| 456 | String marginString = (margin != null ? |
| 457 | margin.toString() : ""); |
| 458 | |
| 459 | return super.paramString() + |
| 460 | ",margin=" + marginString + |
| 461 | ",paintBorder=" + paintBorderString; |
| 462 | } |
| 463 | |
| 464 | ///////////////// |
| 465 | // Accessibility support |
| 466 | //////////////// |
| 467 | |
| 468 | /** |
| 469 | * Gets the AccessibleContext associated with this JMenuBar. |
| 470 | * For JMenuBars, the AccessibleContext takes the form of an |
| 471 | * AccessibleJMenuBar. |
| 472 | * A new AccessibleJMenuBar instance is created if necessary. |
| 473 | * |
| 474 | * @return an AccessibleJMenuBar that serves as the |
| 475 | * AccessibleContext of this JMenuBar |
| 476 | */ |
| 477 | public AccessibleContext getAccessibleContext() { |
| 478 | if (accessibleContext == null) { |
| 479 | accessibleContext = new AccessibleJMenuBar(); |
| 480 | } |
| 481 | return accessibleContext; |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * This class implements accessibility support for the |
| 486 | * <code>JMenuBar</code> class. It provides an implementation of the |
| 487 | * Java Accessibility API appropriate to menu bar user-interface |
| 488 | * elements. |
| 489 | * <p> |
| 490 | * <strong>Warning:</strong> |
| 491 | * Serialized objects of this class will not be compatible with |
| 492 | * future Swing releases. The current serialization support is |
| 493 | * appropriate for short term storage or RMI between applications running |
| 494 | * the same version of Swing. As of 1.4, support for long term storage |
| 495 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 496 | * has been added to the <code>java.beans</code> package. |
| 497 | * Please see {@link java.beans.XMLEncoder}. |
| 498 | */ |
| 499 | protected class AccessibleJMenuBar extends AccessibleJComponent |
| 500 | implements AccessibleSelection { |
| 501 | |
| 502 | /** |
| 503 | * Get the accessible state set of this object. |
| 504 | * |
| 505 | * @return an instance of AccessibleState containing the current state |
| 506 | * of the object |
| 507 | */ |
| 508 | public AccessibleStateSet getAccessibleStateSet() { |
| 509 | AccessibleStateSet states = super.getAccessibleStateSet(); |
| 510 | return states; |
| 511 | } |
| 512 | |
| 513 | /** |
| 514 | * Get the role of this object. |
| 515 | * |
| 516 | * @return an instance of AccessibleRole describing the role of the |
| 517 | * object |
| 518 | */ |
| 519 | public AccessibleRole getAccessibleRole() { |
| 520 | return AccessibleRole.MENU_BAR; |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * Get the AccessibleSelection associated with this object. In the |
| 525 | * implementation of the Java Accessibility API for this class, |
| 526 | * return this object, which is responsible for implementing the |
| 527 | * AccessibleSelection interface on behalf of itself. |
| 528 | * |
| 529 | * @return this object |
| 530 | */ |
| 531 | public AccessibleSelection getAccessibleSelection() { |
| 532 | return this; |
| 533 | } |
| 534 | |
| 535 | /** |
| 536 | * Returns 1 if a menu is currently selected in this menu bar. |
| 537 | * |
| 538 | * @return 1 if a menu is currently selected, else 0 |
| 539 | */ |
| 540 | public int getAccessibleSelectionCount() { |
| 541 | if (isSelected()) { |
| 542 | return 1; |
| 543 | } else { |
| 544 | return 0; |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | /** |
| 549 | * Returns the currently selected menu if one is selected, |
| 550 | * otherwise null. |
| 551 | */ |
| 552 | public Accessible getAccessibleSelection(int i) { |
| 553 | if (isSelected()) { |
| 554 | if (i != 0) { // single selection model for JMenuBar |
| 555 | return null; |
| 556 | } |
| 557 | int j = getSelectionModel().getSelectedIndex(); |
| 558 | if (getComponentAtIndex(j) instanceof Accessible) { |
| 559 | return (Accessible) getComponentAtIndex(j); |
| 560 | } |
| 561 | } |
| 562 | return null; |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * Returns true if the current child of this object is selected. |
| 567 | * |
| 568 | * @param i the zero-based index of the child in this Accessible |
| 569 | * object. |
| 570 | * @see AccessibleContext#getAccessibleChild |
| 571 | */ |
| 572 | public boolean isAccessibleChildSelected(int i) { |
| 573 | return (i == getSelectionModel().getSelectedIndex()); |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * Selects the nth menu in the menu bar, forcing it to |
| 578 | * pop up. If another menu is popped up, this will force |
| 579 | * it to close. If the nth menu is already selected, this |
| 580 | * method has no effect. |
| 581 | * |
| 582 | * @param i the zero-based index of selectable items |
| 583 | * @see #getAccessibleStateSet |
| 584 | */ |
| 585 | public void addAccessibleSelection(int i) { |
| 586 | // first close up any open menu |
| 587 | int j = getSelectionModel().getSelectedIndex(); |
| 588 | if (i == j) { |
| 589 | return; |
| 590 | } |
| 591 | if (j >= 0 && j < getMenuCount()) { |
| 592 | JMenu menu = getMenu(j); |
| 593 | if (menu != null) { |
| 594 | MenuSelectionManager.defaultManager().setSelectedPath(null); |
| 595 | // menu.setPopupMenuVisible(false); |
| 596 | } |
| 597 | } |
| 598 | // now popup the new menu |
| 599 | getSelectionModel().setSelectedIndex(i); |
| 600 | JMenu menu = getMenu(i); |
| 601 | if (menu != null) { |
| 602 | MenuElement me[] = new MenuElement[3]; |
| 603 | me[0] = JMenuBar.this; |
| 604 | me[1] = menu; |
| 605 | me[2] = menu.getPopupMenu(); |
| 606 | MenuSelectionManager.defaultManager().setSelectedPath(me); |
| 607 | // menu.setPopupMenuVisible(true); |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * Removes the nth selected item in the object from the object's |
| 613 | * selection. If the nth item isn't currently selected, this |
| 614 | * method has no effect. Otherwise, it closes the popup menu. |
| 615 | * |
| 616 | * @param i the zero-based index of selectable items |
| 617 | */ |
| 618 | public void removeAccessibleSelection(int i) { |
| 619 | if (i >= 0 && i < getMenuCount()) { |
| 620 | JMenu menu = getMenu(i); |
| 621 | if (menu != null) { |
| 622 | MenuSelectionManager.defaultManager().setSelectedPath(null); |
| 623 | // menu.setPopupMenuVisible(false); |
| 624 | } |
| 625 | getSelectionModel().setSelectedIndex(-1); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * Clears the selection in the object, so that nothing in the |
| 631 | * object is selected. This will close any open menu. |
| 632 | */ |
| 633 | public void clearAccessibleSelection() { |
| 634 | int i = getSelectionModel().getSelectedIndex(); |
| 635 | if (i >= 0 && i < getMenuCount()) { |
| 636 | JMenu menu = getMenu(i); |
| 637 | if (menu != null) { |
| 638 | MenuSelectionManager.defaultManager().setSelectedPath(null); |
| 639 | // menu.setPopupMenuVisible(false); |
| 640 | } |
| 641 | } |
| 642 | getSelectionModel().setSelectedIndex(-1); |
| 643 | } |
| 644 | |
| 645 | /** |
| 646 | * Normally causes every selected item in the object to be selected |
| 647 | * if the object supports multiple selections. This method |
| 648 | * makes no sense in a menu bar, and so does nothing. |
| 649 | */ |
| 650 | public void selectAllAccessibleSelection() { |
| 651 | } |
| 652 | } // internal class AccessibleJMenuBar |
| 653 | |
| 654 | |
| 655 | /** |
| 656 | * Subclassed to check all the child menus. |
| 657 | * @since 1.3 |
| 658 | */ |
| 659 | protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, |
| 660 | int condition, boolean pressed) { |
| 661 | // See if we have a local binding. |
| 662 | boolean retValue = super.processKeyBinding(ks, e, condition, pressed); |
| 663 | if (!retValue) { |
| 664 | MenuElement[] subElements = getSubElements(); |
| 665 | for (int i=0; i<subElements.length; i++) { |
| 666 | if (processBindingForKeyStrokeRecursive( |
| 667 | subElements[i], ks, e, condition, pressed)) { |
| 668 | return true; |
| 669 | } |
| 670 | } |
| 671 | } |
| 672 | return retValue; |
| 673 | } |
| 674 | |
| 675 | static boolean processBindingForKeyStrokeRecursive(MenuElement elem, |
| 676 | KeyStroke ks, KeyEvent e, int condition, boolean pressed) { |
| 677 | if (elem == null) { |
| 678 | return false; |
| 679 | } |
| 680 | |
| 681 | Component c = elem.getComponent(); |
| 682 | |
| 683 | if ( !(c.isVisible() || (c instanceof JPopupMenu)) || !c.isEnabled() ) { |
| 684 | return false; |
| 685 | } |
| 686 | |
| 687 | if (c != null && c instanceof JComponent && |
| 688 | ((JComponent)c).processKeyBinding(ks, e, condition, pressed)) { |
| 689 | |
| 690 | return true; |
| 691 | } |
| 692 | |
| 693 | MenuElement[] subElements = elem.getSubElements(); |
| 694 | for(int i=0; i<subElements.length; i++) { |
| 695 | if (processBindingForKeyStrokeRecursive(subElements[i], ks, e, |
| 696 | condition, pressed)) { |
| 697 | return true; |
| 698 | // We don't, pass along to children JMenu's |
| 699 | } |
| 700 | } |
| 701 | return false; |
| 702 | } |
| 703 | |
| 704 | /** |
| 705 | * Overrides <code>JComponent.addNotify</code> to register this |
| 706 | * menu bar with the current keyboard manager. |
| 707 | */ |
| 708 | public void addNotify() { |
| 709 | super.addNotify(); |
| 710 | KeyboardManager.getCurrentManager().registerMenuBar(this); |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * Overrides <code>JComponent.removeNotify</code> to unregister this |
| 715 | * menu bar with the current keyboard manager. |
| 716 | */ |
| 717 | public void removeNotify() { |
| 718 | super.removeNotify(); |
| 719 | KeyboardManager.getCurrentManager().unregisterMenuBar(this); |
| 720 | } |
| 721 | |
| 722 | |
| 723 | private void writeObject(ObjectOutputStream s) throws IOException { |
| 724 | s.defaultWriteObject(); |
| 725 | if (getUIClassID().equals(uiClassID)) { |
| 726 | byte count = JComponent.getWriteObjCounter(this); |
| 727 | JComponent.setWriteObjCounter(this, --count); |
| 728 | if (count == 0 && ui != null) { |
| 729 | ui.installUI(this); |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | Object[] kvData = new Object[4]; |
| 734 | int n = 0; |
| 735 | |
| 736 | if (selectionModel instanceof Serializable) { |
| 737 | kvData[n++] = "selectionModel"; |
| 738 | kvData[n++] = selectionModel; |
| 739 | } |
| 740 | |
| 741 | s.writeObject(kvData); |
| 742 | } |
| 743 | |
| 744 | |
| 745 | /** |
| 746 | * See JComponent.readObject() for information about serialization |
| 747 | * in Swing. |
| 748 | */ |
| 749 | private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException |
| 750 | { |
| 751 | s.defaultReadObject(); |
| 752 | Object[] kvData = (Object[])(s.readObject()); |
| 753 | |
| 754 | for(int i = 0; i < kvData.length; i += 2) { |
| 755 | if (kvData[i] == null) { |
| 756 | break; |
| 757 | } |
| 758 | else if (kvData[i].equals("selectionModel")) { |
| 759 | selectionModel = (SingleSelectionModel)kvData[i + 1]; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | } |
| 764 | } |