J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2005 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.table; |
| 27 | |
| 28 | import javax.swing.*; |
| 29 | import javax.swing.event.*; |
| 30 | import java.awt.*; |
| 31 | import java.util.Vector; |
| 32 | import java.util.Enumeration; |
| 33 | import java.util.EventListener; |
| 34 | import java.beans.PropertyChangeListener; |
| 35 | import java.beans.PropertyChangeEvent; |
| 36 | import java.io.Serializable; |
| 37 | import sun.swing.SwingUtilities2; |
| 38 | |
| 39 | /** |
| 40 | * The standard column-handler for a <code>JTable</code>. |
| 41 | * <p> |
| 42 | * <strong>Warning:</strong> |
| 43 | * Serialized objects of this class will not be compatible with |
| 44 | * future Swing releases. The current serialization support is |
| 45 | * appropriate for short term storage or RMI between applications running |
| 46 | * the same version of Swing. As of 1.4, support for long term storage |
| 47 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 48 | * has been added to the <code>java.beans</code> package. |
| 49 | * Please see {@link java.beans.XMLEncoder}. |
| 50 | * |
| 51 | * @author Alan Chung |
| 52 | * @author Philip Milne |
| 53 | * @see JTable |
| 54 | */ |
| 55 | public class DefaultTableColumnModel implements TableColumnModel, |
| 56 | PropertyChangeListener, ListSelectionListener, Serializable |
| 57 | { |
| 58 | // |
| 59 | // Instance Variables |
| 60 | // |
| 61 | |
| 62 | /** Array of TableColumn objects in this model */ |
| 63 | protected Vector<TableColumn> tableColumns; |
| 64 | |
| 65 | /** Model for keeping track of column selections */ |
| 66 | protected ListSelectionModel selectionModel; |
| 67 | |
| 68 | /** Width margin between each column */ |
| 69 | protected int columnMargin; |
| 70 | |
| 71 | /** List of TableColumnModelListener */ |
| 72 | protected EventListenerList listenerList = new EventListenerList(); |
| 73 | |
| 74 | /** Change event (only one needed) */ |
| 75 | transient protected ChangeEvent changeEvent = null; |
| 76 | |
| 77 | /** Column selection allowed in this column model */ |
| 78 | protected boolean columnSelectionAllowed; |
| 79 | |
| 80 | /** A local cache of the combined width of all columns */ |
| 81 | protected int totalColumnWidth; |
| 82 | |
| 83 | // |
| 84 | // Constructors |
| 85 | // |
| 86 | /** |
| 87 | * Creates a default table column model. |
| 88 | */ |
| 89 | public DefaultTableColumnModel() { |
| 90 | super(); |
| 91 | |
| 92 | // Initialize local ivars to default |
| 93 | tableColumns = new Vector<TableColumn>(); |
| 94 | setSelectionModel(createSelectionModel()); |
| 95 | setColumnMargin(1); |
| 96 | invalidateWidthCache(); |
| 97 | setColumnSelectionAllowed(false); |
| 98 | } |
| 99 | |
| 100 | // |
| 101 | // Modifying the model |
| 102 | // |
| 103 | |
| 104 | /** |
| 105 | * Appends <code>aColumn</code> to the end of the |
| 106 | * <code>tableColumns</code> array. |
| 107 | * This method also posts the <code>columnAdded</code> |
| 108 | * event to its listeners. |
| 109 | * |
| 110 | * @param aColumn the <code>TableColumn</code> to be added |
| 111 | * @exception IllegalArgumentException if <code>aColumn</code> is |
| 112 | * <code>null</code> |
| 113 | * @see #removeColumn |
| 114 | */ |
| 115 | public void addColumn(TableColumn aColumn) { |
| 116 | if (aColumn == null) { |
| 117 | throw new IllegalArgumentException("Object is null"); |
| 118 | } |
| 119 | |
| 120 | tableColumns.addElement(aColumn); |
| 121 | aColumn.addPropertyChangeListener(this); |
| 122 | invalidateWidthCache(); |
| 123 | |
| 124 | // Post columnAdded event notification |
| 125 | fireColumnAdded(new TableColumnModelEvent(this, 0, |
| 126 | getColumnCount() - 1)); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Deletes the <code>column</code> from the |
| 131 | * <code>tableColumns</code> array. This method will do nothing if |
| 132 | * <code>column</code> is not in the table's columns list. |
| 133 | * <code>tile</code> is called |
| 134 | * to resize both the header and table views. |
| 135 | * This method also posts a <code>columnRemoved</code> |
| 136 | * event to its listeners. |
| 137 | * |
| 138 | * @param column the <code>TableColumn</code> to be removed |
| 139 | * @see #addColumn |
| 140 | */ |
| 141 | public void removeColumn(TableColumn column) { |
| 142 | int columnIndex = tableColumns.indexOf(column); |
| 143 | |
| 144 | if (columnIndex != -1) { |
| 145 | // Adjust for the selection |
| 146 | if (selectionModel != null) { |
| 147 | selectionModel.removeIndexInterval(columnIndex,columnIndex); |
| 148 | } |
| 149 | |
| 150 | column.removePropertyChangeListener(this); |
| 151 | tableColumns.removeElementAt(columnIndex); |
| 152 | invalidateWidthCache(); |
| 153 | |
| 154 | // Post columnAdded event notification. (JTable and JTableHeader |
| 155 | // listens so they can adjust size and redraw) |
| 156 | fireColumnRemoved(new TableColumnModelEvent(this, |
| 157 | columnIndex, 0)); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Moves the column and heading at <code>columnIndex</code> to |
| 163 | * <code>newIndex</code>. The old column at <code>columnIndex</code> |
| 164 | * will now be found at <code>newIndex</code>. The column |
| 165 | * that used to be at <code>newIndex</code> is shifted |
| 166 | * left or right to make room. This will not move any columns if |
| 167 | * <code>columnIndex</code> equals <code>newIndex</code>. This method |
| 168 | * also posts a <code>columnMoved</code> event to its listeners. |
| 169 | * |
| 170 | * @param columnIndex the index of column to be moved |
| 171 | * @param newIndex new index to move the column |
| 172 | * @exception IllegalArgumentException if <code>column</code> or |
| 173 | * <code>newIndex</code> |
| 174 | * are not in the valid range |
| 175 | */ |
| 176 | public void moveColumn(int columnIndex, int newIndex) { |
| 177 | if ((columnIndex < 0) || (columnIndex >= getColumnCount()) || |
| 178 | (newIndex < 0) || (newIndex >= getColumnCount())) |
| 179 | throw new IllegalArgumentException("moveColumn() - Index out of range"); |
| 180 | |
| 181 | TableColumn aColumn; |
| 182 | |
| 183 | // If the column has not yet moved far enough to change positions |
| 184 | // post the event anyway, the "draggedDistance" property of the |
| 185 | // tableHeader will say how far the column has been dragged. |
| 186 | // Here we are really trying to get the best out of an |
| 187 | // API that could do with some rethinking. We preserve backward |
| 188 | // compatibility by slightly bending the meaning of these methods. |
| 189 | if (columnIndex == newIndex) { |
| 190 | fireColumnMoved(new TableColumnModelEvent(this, columnIndex, newIndex)); |
| 191 | return; |
| 192 | } |
| 193 | aColumn = (TableColumn)tableColumns.elementAt(columnIndex); |
| 194 | |
| 195 | tableColumns.removeElementAt(columnIndex); |
| 196 | boolean selected = selectionModel.isSelectedIndex(columnIndex); |
| 197 | selectionModel.removeIndexInterval(columnIndex,columnIndex); |
| 198 | |
| 199 | tableColumns.insertElementAt(aColumn, newIndex); |
| 200 | selectionModel.insertIndexInterval(newIndex, 1, true); |
| 201 | if (selected) { |
| 202 | selectionModel.addSelectionInterval(newIndex, newIndex); |
| 203 | } |
| 204 | else { |
| 205 | selectionModel.removeSelectionInterval(newIndex, newIndex); |
| 206 | } |
| 207 | |
| 208 | fireColumnMoved(new TableColumnModelEvent(this, columnIndex, |
| 209 | newIndex)); |
| 210 | } |
| 211 | |
| 212 | /** |
| 213 | * Sets the column margin to <code>newMargin</code>. This method |
| 214 | * also posts a <code>columnMarginChanged</code> event to its |
| 215 | * listeners. |
| 216 | * |
| 217 | * @param newMargin the new margin width, in pixels |
| 218 | * @see #getColumnMargin |
| 219 | * @see #getTotalColumnWidth |
| 220 | */ |
| 221 | public void setColumnMargin(int newMargin) { |
| 222 | if (newMargin != columnMargin) { |
| 223 | columnMargin = newMargin; |
| 224 | // Post columnMarginChanged event notification. |
| 225 | fireColumnMarginChanged(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | // |
| 230 | // Querying the model |
| 231 | // |
| 232 | |
| 233 | /** |
| 234 | * Returns the number of columns in the <code>tableColumns</code> array. |
| 235 | * |
| 236 | * @return the number of columns in the <code>tableColumns</code> array |
| 237 | * @see #getColumns |
| 238 | */ |
| 239 | public int getColumnCount() { |
| 240 | return tableColumns.size(); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Returns an <code>Enumeration</code> of all the columns in the model. |
| 245 | * @return an <code>Enumeration</code> of the columns in the model |
| 246 | */ |
| 247 | public Enumeration<TableColumn> getColumns() { |
| 248 | return tableColumns.elements(); |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Returns the index of the first column in the <code>tableColumns</code> |
| 253 | * array whose identifier is equal to <code>identifier</code>, |
| 254 | * when compared using <code>equals</code>. |
| 255 | * |
| 256 | * @param identifier the identifier object |
| 257 | * @return the index of the first column in the |
| 258 | * <code>tableColumns</code> array whose identifier |
| 259 | * is equal to <code>identifier</code> |
| 260 | * @exception IllegalArgumentException if <code>identifier</code> |
| 261 | * is <code>null</code>, or if no |
| 262 | * <code>TableColumn</code> has this |
| 263 | * <code>identifier</code> |
| 264 | * @see #getColumn |
| 265 | */ |
| 266 | public int getColumnIndex(Object identifier) { |
| 267 | if (identifier == null) { |
| 268 | throw new IllegalArgumentException("Identifier is null"); |
| 269 | } |
| 270 | |
| 271 | Enumeration enumeration = getColumns(); |
| 272 | TableColumn aColumn; |
| 273 | int index = 0; |
| 274 | |
| 275 | while (enumeration.hasMoreElements()) { |
| 276 | aColumn = (TableColumn)enumeration.nextElement(); |
| 277 | // Compare them this way in case the column's identifier is null. |
| 278 | if (identifier.equals(aColumn.getIdentifier())) |
| 279 | return index; |
| 280 | index++; |
| 281 | } |
| 282 | throw new IllegalArgumentException("Identifier not found"); |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Returns the <code>TableColumn</code> object for the column |
| 287 | * at <code>columnIndex</code>. |
| 288 | * |
| 289 | * @param columnIndex the index of the column desired |
| 290 | * @return the <code>TableColumn</code> object for the column |
| 291 | * at <code>columnIndex</code> |
| 292 | */ |
| 293 | public TableColumn getColumn(int columnIndex) { |
| 294 | return (TableColumn)tableColumns.elementAt(columnIndex); |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Returns the width margin for <code>TableColumn</code>. |
| 299 | * The default <code>columnMargin</code> is 1. |
| 300 | * |
| 301 | * @return the maximum width for the <code>TableColumn</code> |
| 302 | * @see #setColumnMargin |
| 303 | */ |
| 304 | public int getColumnMargin() { |
| 305 | return columnMargin; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Returns the index of the column that lies at position <code>x</code>, |
| 310 | * or -1 if no column covers this point. |
| 311 | * |
| 312 | * In keeping with Swing's separable model architecture, a |
| 313 | * TableColumnModel does not know how the table columns actually appear on |
| 314 | * screen. The visual presentation of the columns is the responsibility |
| 315 | * of the view/controller object using this model (typically JTable). The |
| 316 | * view/controller need not display the columns sequentially from left to |
| 317 | * right. For example, columns could be displayed from right to left to |
| 318 | * accomodate a locale preference or some columns might be hidden at the |
| 319 | * request of the user. Because the model does not know how the columns |
| 320 | * are laid out on screen, the given <code>xPosition</code> should not be |
| 321 | * considered to be a coordinate in 2D graphics space. Instead, it should |
| 322 | * be considered to be a width from the start of the first column in the |
| 323 | * model. If the column index for a given X coordinate in 2D space is |
| 324 | * required, <code>JTable.columnAtPoint</code> can be used instead. |
| 325 | * |
| 326 | * @param x the horizontal location of interest |
| 327 | * @return the index of the column or -1 if no column is found |
| 328 | * @see javax.swing.JTable#columnAtPoint |
| 329 | */ |
| 330 | public int getColumnIndexAtX(int x) { |
| 331 | if (x < 0) { |
| 332 | return -1; |
| 333 | } |
| 334 | int cc = getColumnCount(); |
| 335 | for(int column = 0; column < cc; column++) { |
| 336 | x = x - getColumn(column).getWidth(); |
| 337 | if (x < 0) { |
| 338 | return column; |
| 339 | } |
| 340 | } |
| 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * Returns the total combined width of all columns. |
| 346 | * @return the <code>totalColumnWidth</code> property |
| 347 | */ |
| 348 | public int getTotalColumnWidth() { |
| 349 | if (totalColumnWidth == -1) { |
| 350 | recalcWidthCache(); |
| 351 | } |
| 352 | return totalColumnWidth; |
| 353 | } |
| 354 | |
| 355 | // |
| 356 | // Selection model |
| 357 | // |
| 358 | |
| 359 | /** |
| 360 | * Sets the selection model for this <code>TableColumnModel</code> |
| 361 | * to <code>newModel</code> |
| 362 | * and registers for listener notifications from the new selection |
| 363 | * model. If <code>newModel</code> is <code>null</code>, |
| 364 | * an exception is thrown. |
| 365 | * |
| 366 | * @param newModel the new selection model |
| 367 | * @exception IllegalArgumentException if <code>newModel</code> |
| 368 | * is <code>null</code> |
| 369 | * @see #getSelectionModel |
| 370 | */ |
| 371 | public void setSelectionModel(ListSelectionModel newModel) { |
| 372 | if (newModel == null) { |
| 373 | throw new IllegalArgumentException("Cannot set a null SelectionModel"); |
| 374 | } |
| 375 | |
| 376 | ListSelectionModel oldModel = selectionModel; |
| 377 | |
| 378 | if (newModel != oldModel) { |
| 379 | if (oldModel != null) { |
| 380 | oldModel.removeListSelectionListener(this); |
| 381 | } |
| 382 | |
| 383 | selectionModel= newModel; |
| 384 | newModel.addListSelectionListener(this); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * Returns the <code>ListSelectionModel</code> that is used to |
| 390 | * maintain column selection state. |
| 391 | * |
| 392 | * @return the object that provides column selection state. Or |
| 393 | * <code>null</code> if row selection is not allowed. |
| 394 | * @see #setSelectionModel |
| 395 | */ |
| 396 | public ListSelectionModel getSelectionModel() { |
| 397 | return selectionModel; |
| 398 | } |
| 399 | |
| 400 | // implements javax.swing.table.TableColumnModel |
| 401 | /** |
| 402 | * Sets whether column selection is allowed. The default is false. |
| 403 | * @param flag true if column selection will be allowed, false otherwise |
| 404 | */ |
| 405 | public void setColumnSelectionAllowed(boolean flag) { |
| 406 | columnSelectionAllowed = flag; |
| 407 | } |
| 408 | |
| 409 | // implements javax.swing.table.TableColumnModel |
| 410 | /** |
| 411 | * Returns true if column selection is allowed, otherwise false. |
| 412 | * The default is false. |
| 413 | * @return the <code>columnSelectionAllowed</code> property |
| 414 | */ |
| 415 | public boolean getColumnSelectionAllowed() { |
| 416 | return columnSelectionAllowed; |
| 417 | } |
| 418 | |
| 419 | // implements javax.swing.table.TableColumnModel |
| 420 | /** |
| 421 | * Returns an array of selected columns. If <code>selectionModel</code> |
| 422 | * is <code>null</code>, returns an empty array. |
| 423 | * @return an array of selected columns or an empty array if nothing |
| 424 | * is selected or the <code>selectionModel</code> is |
| 425 | * <code>null</code> |
| 426 | */ |
| 427 | public int[] getSelectedColumns() { |
| 428 | if (selectionModel != null) { |
| 429 | int iMin = selectionModel.getMinSelectionIndex(); |
| 430 | int iMax = selectionModel.getMaxSelectionIndex(); |
| 431 | |
| 432 | if ((iMin == -1) || (iMax == -1)) { |
| 433 | return new int[0]; |
| 434 | } |
| 435 | |
| 436 | int[] rvTmp = new int[1+ (iMax - iMin)]; |
| 437 | int n = 0; |
| 438 | for(int i = iMin; i <= iMax; i++) { |
| 439 | if (selectionModel.isSelectedIndex(i)) { |
| 440 | rvTmp[n++] = i; |
| 441 | } |
| 442 | } |
| 443 | int[] rv = new int[n]; |
| 444 | System.arraycopy(rvTmp, 0, rv, 0, n); |
| 445 | return rv; |
| 446 | } |
| 447 | return new int[0]; |
| 448 | } |
| 449 | |
| 450 | // implements javax.swing.table.TableColumnModel |
| 451 | /** |
| 452 | * Returns the number of columns selected. |
| 453 | * @return the number of columns selected |
| 454 | */ |
| 455 | public int getSelectedColumnCount() { |
| 456 | if (selectionModel != null) { |
| 457 | int iMin = selectionModel.getMinSelectionIndex(); |
| 458 | int iMax = selectionModel.getMaxSelectionIndex(); |
| 459 | int count = 0; |
| 460 | |
| 461 | for(int i = iMin; i <= iMax; i++) { |
| 462 | if (selectionModel.isSelectedIndex(i)) { |
| 463 | count++; |
| 464 | } |
| 465 | } |
| 466 | return count; |
| 467 | } |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | // |
| 472 | // Listener Support Methods |
| 473 | // |
| 474 | |
| 475 | // implements javax.swing.table.TableColumnModel |
| 476 | /** |
| 477 | * Adds a listener for table column model events. |
| 478 | * @param x a <code>TableColumnModelListener</code> object |
| 479 | */ |
| 480 | public void addColumnModelListener(TableColumnModelListener x) { |
| 481 | listenerList.add(TableColumnModelListener.class, x); |
| 482 | } |
| 483 | |
| 484 | // implements javax.swing.table.TableColumnModel |
| 485 | /** |
| 486 | * Removes a listener for table column model events. |
| 487 | * @param x a <code>TableColumnModelListener</code> object |
| 488 | */ |
| 489 | public void removeColumnModelListener(TableColumnModelListener x) { |
| 490 | listenerList.remove(TableColumnModelListener.class, x); |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * Returns an array of all the column model listeners |
| 495 | * registered on this model. |
| 496 | * |
| 497 | * @return all of this default table column model's <code>ColumnModelListener</code>s |
| 498 | * or an empty |
| 499 | * array if no column model listeners are currently registered |
| 500 | * |
| 501 | * @see #addColumnModelListener |
| 502 | * @see #removeColumnModelListener |
| 503 | * |
| 504 | * @since 1.4 |
| 505 | */ |
| 506 | public TableColumnModelListener[] getColumnModelListeners() { |
| 507 | return (TableColumnModelListener[])listenerList.getListeners( |
| 508 | TableColumnModelListener.class); |
| 509 | } |
| 510 | |
| 511 | // |
| 512 | // Event firing methods |
| 513 | // |
| 514 | |
| 515 | /** |
| 516 | * Notifies all listeners that have registered interest for |
| 517 | * notification on this event type. The event instance |
| 518 | * is lazily created using the parameters passed into |
| 519 | * the fire method. |
| 520 | * @param e the event received |
| 521 | * @see EventListenerList |
| 522 | */ |
| 523 | protected void fireColumnAdded(TableColumnModelEvent e) { |
| 524 | // Guaranteed to return a non-null array |
| 525 | Object[] listeners = listenerList.getListenerList(); |
| 526 | // Process the listeners last to first, notifying |
| 527 | // those that are interested in this event |
| 528 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 529 | if (listeners[i]==TableColumnModelListener.class) { |
| 530 | // Lazily create the event: |
| 531 | // if (e == null) |
| 532 | // e = new ChangeEvent(this); |
| 533 | ((TableColumnModelListener)listeners[i+1]). |
| 534 | columnAdded(e); |
| 535 | } |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * Notifies all listeners that have registered interest for |
| 541 | * notification on this event type. The event instance |
| 542 | * is lazily created using the parameters passed into |
| 543 | * the fire method. |
| 544 | * @param e the event received |
| 545 | * @see EventListenerList |
| 546 | */ |
| 547 | protected void fireColumnRemoved(TableColumnModelEvent e) { |
| 548 | // Guaranteed to return a non-null array |
| 549 | Object[] listeners = listenerList.getListenerList(); |
| 550 | // Process the listeners last to first, notifying |
| 551 | // those that are interested in this event |
| 552 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 553 | if (listeners[i]==TableColumnModelListener.class) { |
| 554 | // Lazily create the event: |
| 555 | // if (e == null) |
| 556 | // e = new ChangeEvent(this); |
| 557 | ((TableColumnModelListener)listeners[i+1]). |
| 558 | columnRemoved(e); |
| 559 | } |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * Notifies all listeners that have registered interest for |
| 565 | * notification on this event type. The event instance |
| 566 | * is lazily created using the parameters passed into |
| 567 | * the fire method. |
| 568 | * @param e the event received |
| 569 | * @see EventListenerList |
| 570 | */ |
| 571 | protected void fireColumnMoved(TableColumnModelEvent e) { |
| 572 | // Guaranteed to return a non-null array |
| 573 | Object[] listeners = listenerList.getListenerList(); |
| 574 | // Process the listeners last to first, notifying |
| 575 | // those that are interested in this event |
| 576 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 577 | if (listeners[i]==TableColumnModelListener.class) { |
| 578 | // Lazily create the event: |
| 579 | // if (e == null) |
| 580 | // e = new ChangeEvent(this); |
| 581 | ((TableColumnModelListener)listeners[i+1]). |
| 582 | columnMoved(e); |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * Notifies all listeners that have registered interest for |
| 589 | * notification on this event type. The event instance |
| 590 | * is lazily created using the parameters passed into |
| 591 | * the fire method. |
| 592 | * @param e the event received |
| 593 | * @see EventListenerList |
| 594 | */ |
| 595 | protected void fireColumnSelectionChanged(ListSelectionEvent e) { |
| 596 | // Guaranteed to return a non-null array |
| 597 | Object[] listeners = listenerList.getListenerList(); |
| 598 | // Process the listeners last to first, notifying |
| 599 | // those that are interested in this event |
| 600 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 601 | if (listeners[i]==TableColumnModelListener.class) { |
| 602 | // Lazily create the event: |
| 603 | // if (e == null) |
| 604 | // e = new ChangeEvent(this); |
| 605 | ((TableColumnModelListener)listeners[i+1]). |
| 606 | columnSelectionChanged(e); |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * Notifies all listeners that have registered interest for |
| 613 | * notification on this event type. The event instance |
| 614 | * is lazily created using the parameters passed into |
| 615 | * the fire method. |
| 616 | * @see EventListenerList |
| 617 | */ |
| 618 | protected void fireColumnMarginChanged() { |
| 619 | // Guaranteed to return a non-null array |
| 620 | Object[] listeners = listenerList.getListenerList(); |
| 621 | // Process the listeners last to first, notifying |
| 622 | // those that are interested in this event |
| 623 | for (int i = listeners.length-2; i>=0; i-=2) { |
| 624 | if (listeners[i]==TableColumnModelListener.class) { |
| 625 | // Lazily create the event: |
| 626 | if (changeEvent == null) |
| 627 | changeEvent = new ChangeEvent(this); |
| 628 | ((TableColumnModelListener)listeners[i+1]). |
| 629 | columnMarginChanged(changeEvent); |
| 630 | } |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * Returns an array of all the objects currently registered |
| 636 | * as <code><em>Foo</em>Listener</code>s |
| 637 | * upon this model. |
| 638 | * <code><em>Foo</em>Listener</code>s are registered using the |
| 639 | * <code>add<em>Foo</em>Listener</code> method. |
| 640 | * |
| 641 | * <p> |
| 642 | * |
| 643 | * You can specify the <code>listenerType</code> argument |
| 644 | * with a class literal, |
| 645 | * such as |
| 646 | * <code><em>Foo</em>Listener.class</code>. |
| 647 | * For example, you can query a |
| 648 | * <code>DefaultTableColumnModel</code> <code>m</code> |
| 649 | * for its column model listeners with the following code: |
| 650 | * |
| 651 | * <pre>ColumnModelListener[] cmls = (ColumnModelListener[])(m.getListeners(ColumnModelListener.class));</pre> |
| 652 | * |
| 653 | * If no such listeners exist, this method returns an empty array. |
| 654 | * |
| 655 | * @param listenerType the type of listeners requested; this parameter |
| 656 | * should specify an interface that descends from |
| 657 | * <code>java.util.EventListener</code> |
| 658 | * @return an array of all objects registered as |
| 659 | * <code><em>Foo</em>Listener</code>s on this model, |
| 660 | * or an empty array if no such |
| 661 | * listeners have been added |
| 662 | * @exception ClassCastException if <code>listenerType</code> |
| 663 | * doesn't specify a class or interface that implements |
| 664 | * <code>java.util.EventListener</code> |
| 665 | * |
| 666 | * @see #getColumnModelListeners |
| 667 | * @since 1.3 |
| 668 | */ |
| 669 | public <T extends EventListener> T[] getListeners(Class<T> listenerType) { |
| 670 | return listenerList.getListeners(listenerType); |
| 671 | } |
| 672 | |
| 673 | // |
| 674 | // Implementing the PropertyChangeListener interface |
| 675 | // |
| 676 | |
| 677 | // PENDING(alan) |
| 678 | // implements java.beans.PropertyChangeListener |
| 679 | /** |
| 680 | * Property Change Listener change method. Used to track changes |
| 681 | * to the column width or preferred column width. |
| 682 | * |
| 683 | * @param evt <code>PropertyChangeEvent</code> |
| 684 | */ |
| 685 | public void propertyChange(PropertyChangeEvent evt) { |
| 686 | String name = evt.getPropertyName(); |
| 687 | |
| 688 | if (name == "width" || name == "preferredWidth") { |
| 689 | invalidateWidthCache(); |
| 690 | // This is a misnomer, we're using this method |
| 691 | // simply to cause a relayout. |
| 692 | fireColumnMarginChanged(); |
| 693 | } |
| 694 | |
| 695 | } |
| 696 | |
| 697 | // |
| 698 | // Implementing ListSelectionListener interface |
| 699 | // |
| 700 | |
| 701 | // implements javax.swing.event.ListSelectionListener |
| 702 | /** |
| 703 | * A <code>ListSelectionListener</code> that forwards |
| 704 | * <code>ListSelectionEvents</code> when there is a column |
| 705 | * selection change. |
| 706 | * |
| 707 | * @param e the change event |
| 708 | */ |
| 709 | public void valueChanged(ListSelectionEvent e) { |
| 710 | fireColumnSelectionChanged(e); |
| 711 | } |
| 712 | |
| 713 | // |
| 714 | // Protected Methods |
| 715 | // |
| 716 | |
| 717 | /** |
| 718 | * Creates a new default list selection model. |
| 719 | */ |
| 720 | protected ListSelectionModel createSelectionModel() { |
| 721 | return new DefaultListSelectionModel(); |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * Recalculates the total combined width of all columns. Updates the |
| 726 | * <code>totalColumnWidth</code> property. |
| 727 | */ |
| 728 | protected void recalcWidthCache() { |
| 729 | Enumeration enumeration = getColumns(); |
| 730 | totalColumnWidth = 0; |
| 731 | while (enumeration.hasMoreElements()) { |
| 732 | totalColumnWidth += ((TableColumn)enumeration.nextElement()).getWidth(); |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | private void invalidateWidthCache() { |
| 737 | totalColumnWidth = -1; |
| 738 | } |
| 739 | |
| 740 | } // End of class DefaultTableColumnModel |