Mercurial > projects > dwt-addons
annotate dwtx/jface/viewers/CheckboxTreeViewer.d @ 43:ea8ff534f622
Fix override and super aliases
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Fri, 11 Apr 2008 01:24:25 +0200 |
| parents | 644f1334b451 |
| children | 46a6e0e6ccd4 |
| rev | line source |
|---|---|
| 10 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2007 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 *******************************************************************************/ | |
| 13 module dwtx.jface.viewers.CheckboxTreeViewer; | |
| 14 | |
| 15 import dwtx.jface.viewers.TreeViewer; | |
| 16 import dwtx.jface.viewers.ICheckable; | |
| 17 import dwtx.jface.viewers.ICheckStateListener; | |
| 18 import dwtx.jface.viewers.CustomHashtable; | |
| 19 import dwtx.jface.viewers.CheckStateChangedEvent; | |
| 20 | |
| 21 import tango.util.collection.ArraySeq; | |
| 22 import tango.util.collection.model.Seq; | |
| 23 | |
| 24 import dwt.DWT; | |
| 25 import dwt.events.SelectionEvent; | |
| 26 import dwt.widgets.Composite; | |
| 27 import dwt.widgets.Control; | |
| 28 import dwt.widgets.Item; | |
| 29 import dwt.widgets.Tree; | |
| 30 import dwt.widgets.TreeItem; | |
| 31 import dwt.widgets.Widget; | |
| 32 import dwtx.core.runtime.Assert; | |
| 33 import dwtx.core.runtime.ListenerList; | |
| 34 import dwtx.jface.util.SafeRunnable; | |
| 35 | |
| 36 import dwt.dwthelper.utils; | |
| 37 import dwt.dwthelper.Runnable; | |
| 38 | |
| 39 /** | |
| 40 * A concrete tree-structured viewer based on an DWT <code>Tree</code> | |
| 41 * control with checkboxes on each node. | |
| 42 * <p> | |
| 43 * This class is not intended to be subclassed outside the viewer framework. | |
| 44 * It is designed to be instantiated with a pre-existing DWT tree control and configured | |
| 45 * with a domain-specific content provider, label provider, element filter (optional), | |
| 46 * and element sorter (optional). | |
| 47 * </p> | |
| 48 */ | |
| 49 public class CheckboxTreeViewer : TreeViewer, ICheckable { | |
|
43
ea8ff534f622
Fix override and super aliases
Frank Benoit <benoit@tionex.de>
parents:
39
diff
changeset
|
50 alias TreeViewer.preservingSelection preservingSelection; |
| 10 | 51 |
| 52 /** | |
| 53 * List of check state listeners (element type: <code>ICheckStateListener</code>). | |
| 54 */ | |
| 55 private ListenerList checkStateListeners; | |
| 56 | |
| 57 /** | |
| 58 * Last item clicked on, or <code>null</code> if none. | |
| 59 */ | |
| 60 private TreeItem lastClickedItem = null; | |
| 61 | |
| 62 /** | |
| 63 * Creates a tree viewer on a newly-created tree control under the given parent. | |
| 64 * The tree control is created using the DWT style bits: <code>CHECK</code> and <code>BORDER</code>. | |
| 65 * The viewer has no input, no content provider, a default label provider, | |
| 66 * no sorter, and no filters. | |
| 67 * | |
| 68 * @param parent the parent control | |
| 69 */ | |
| 70 public this(Composite parent) { | |
| 71 this(parent, DWT.BORDER); | |
| 72 } | |
| 73 | |
| 74 /** | |
| 75 * Creates a tree viewer on a newly-created tree control under the given parent. | |
| 76 * The tree control is created using the given DWT style bits, plus the <code>CHECK</code> style bit. | |
| 77 * The viewer has no input, no content provider, a default label provider, | |
| 78 * no sorter, and no filters. | |
| 79 * | |
| 80 * @param parent the parent control | |
| 81 * @param style the DWT style bits | |
| 82 */ | |
| 83 public this(Composite parent, int style) { | |
| 84 this(new Tree(parent, DWT.CHECK | style)); | |
| 85 } | |
| 86 | |
| 87 /** | |
| 88 * Creates a tree viewer on the given tree control. | |
| 89 * The <code>DWT.CHECK</code> style bit must be set on the given tree control. | |
| 90 * The viewer has no input, no content provider, a default label provider, | |
| 91 * no sorter, and no filters. | |
| 92 * | |
| 93 * @param tree the tree control | |
| 94 */ | |
| 95 public this(Tree tree) { | |
| 96 checkStateListeners = new ListenerList(); | |
| 97 super(tree); | |
| 98 } | |
| 99 | |
| 100 /* (non-Javadoc) | |
| 101 * Method declared on ICheckable. | |
| 102 */ | |
| 103 public void addCheckStateListener(ICheckStateListener listener) { | |
| 104 checkStateListeners.add(cast(Object)listener); | |
| 105 } | |
| 106 | |
| 107 /** | |
| 108 * Applies the checked and grayed states of the given widget and its | |
| 109 * descendents. | |
| 110 * | |
| 111 * @param checked a set of elements (element type: <code>Object</code>) | |
| 112 * @param grayed a set of elements (element type: <code>Object</code>) | |
| 113 * @param widget the widget | |
| 114 */ | |
| 115 private void applyState(CustomHashtable checked, CustomHashtable grayed, | |
| 116 Widget widget) { | |
| 117 Item[] items = getChildren(widget); | |
| 118 for (int i = 0; i < items.length; i++) { | |
| 119 Item item = items[i]; | |
| 120 if ( auto ti = cast(TreeItem) item ) { | |
| 121 Object data = item.getData(); | |
| 122 if (data !is null) { | |
| 123 ti.setChecked(checked.containsKey(data)); | |
| 124 ti.setGrayed(grayed.containsKey(data)); | |
| 125 } | |
| 126 } | |
| 127 applyState(checked, grayed, item); | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 /** | |
| 132 * Notifies any check state listeners that the check state of an element has changed. | |
| 133 * Only listeners registered at the time this method is called are notified. | |
| 134 * | |
| 135 * @param event a check state changed event | |
| 136 * | |
| 137 * @see ICheckStateListener#checkStateChanged | |
| 138 */ | |
| 139 protected void fireCheckStateChanged(CheckStateChangedEvent event) { | |
| 140 Object[] array = checkStateListeners.getListeners(); | |
| 141 for (int i = 0; i < array.length; i++) { | |
| 39 | 142 SafeRunnable.run(new class(cast(ICheckStateListener) array[i]) SafeRunnable { |
| 10 | 143 ICheckStateListener l; |
| 39 | 144 this(ICheckStateListener a){ |
| 145 l = a; | |
| 10 | 146 } |
| 147 public void run() { | |
| 148 l.checkStateChanged(event); | |
| 149 } | |
| 150 }); | |
| 151 } | |
| 152 | |
| 153 } | |
| 154 | |
| 155 /** | |
| 156 * Gathers the checked and grayed states of the given widget and its | |
| 157 * descendents. | |
| 158 * | |
| 159 * @param checked a writable set of elements (element type: <code>Object</code>) | |
| 160 * @param grayed a writable set of elements (element type: <code>Object</code>) | |
| 161 * @param widget the widget | |
| 162 */ | |
| 163 private void gatherState(CustomHashtable checked, CustomHashtable grayed, | |
| 164 Widget widget) { | |
| 165 Item[] items = getChildren(widget); | |
| 166 for (int i = 0; i < items.length; i++) { | |
| 167 Item item = items[i]; | |
| 168 if ( auto ti = cast(TreeItem) item ) { | |
| 169 Object data = item.getData(); | |
| 170 if (data !is null) { | |
| 171 if (ti.getChecked()) { | |
| 172 checked.put(data, data); | |
| 173 } | |
| 174 if (ti.getGrayed()) { | |
| 175 grayed.put(data, data); | |
| 176 } | |
| 177 } | |
| 178 } | |
| 179 gatherState(checked, grayed, item); | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 /* (non-Javadoc) | |
| 184 * Method declared on ICheckable. | |
| 185 */ | |
| 186 public bool getChecked(Object element) { | |
| 187 Widget widget = findItem(element); | |
| 188 if ( auto ti = cast(TreeItem) widget ) { | |
| 189 return ti.getChecked(); | |
| 190 } | |
| 191 return false; | |
| 192 } | |
| 193 | |
| 194 /** | |
| 195 * Returns a list of checked elements in this viewer's tree, | |
| 196 * including currently hidden ones that are marked as | |
| 197 * checked but are under a collapsed ancestor. | |
| 198 * <p> | |
| 199 * This method is typically used when preserving the interesting | |
| 200 * state of a viewer; <code>setCheckedElements</code> is used during the restore. | |
| 201 * </p> | |
| 202 * | |
| 203 * @return the array of checked elements | |
| 204 * | |
| 205 * @see #setCheckedElements | |
| 206 */ | |
| 207 public Object[] getCheckedElements() { | |
| 208 ArraySeq!(Object) v = new ArraySeq!(Object); | |
| 209 Control tree = getControl(); | |
| 210 internalCollectChecked(v, tree); | |
| 211 return v.toArray(); | |
| 212 } | |
| 213 | |
| 214 /** | |
| 215 * Returns the grayed state of the given element. | |
| 216 * | |
| 217 * @param element the element | |
| 218 * @return <code>true</code> if the element is grayed, | |
| 219 * and <code>false</code> if not grayed | |
| 220 */ | |
| 221 public bool getGrayed(Object element) { | |
| 222 Widget widget = findItem(element); | |
| 223 if ( auto ti = cast(TreeItem) widget ) { | |
| 224 return ti.getGrayed(); | |
| 225 } | |
| 226 return false; | |
| 227 } | |
| 228 | |
| 229 /** | |
| 230 * Returns a list of grayed elements in this viewer's tree, | |
| 231 * including currently hidden ones that are marked as | |
| 232 * grayed but are under a collapsed ancestor. | |
| 233 * <p> | |
| 234 * This method is typically used when preserving the interesting | |
| 235 * state of a viewer; <code>setGrayedElements</code> is used during the restore. | |
| 236 * </p> | |
| 237 * | |
| 238 * @return the array of grayed elements | |
| 239 * | |
| 240 * @see #setGrayedElements | |
| 241 */ | |
| 242 public Object[] getGrayedElements() { | |
| 243 ArraySeq!(Object) result = new ArraySeq!(Object); | |
| 244 internalCollectGrayed(result, getControl()); | |
| 245 return result.toArray(); | |
| 246 } | |
| 247 | |
| 248 /* (non-Javadoc) | |
| 249 * Method declared on StructuredViewer. | |
| 250 */ | |
|
43
ea8ff534f622
Fix override and super aliases
Frank Benoit <benoit@tionex.de>
parents:
39
diff
changeset
|
251 protected override void handleDoubleSelect(SelectionEvent event) { |
| 10 | 252 |
| 253 if (lastClickedItem !is null) { | |
| 254 TreeItem item = lastClickedItem; | |
| 255 Object data = item.getData(); | |
| 256 if (data !is null) { | |
| 257 bool state = item.getChecked(); | |
| 258 setChecked(data, !state); | |
| 259 fireCheckStateChanged(new CheckStateChangedEvent(this, data, | |
| 260 !state)); | |
| 261 } | |
| 262 lastClickedItem = null; | |
| 263 } else { | |
| 264 super.handleDoubleSelect(event); | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 /* (non-Javadoc) | |
| 269 * Method declared on StructuredViewer. | |
| 270 */ | |
|
43
ea8ff534f622
Fix override and super aliases
Frank Benoit <benoit@tionex.de>
parents:
39
diff
changeset
|
271 protected override void handleSelect(SelectionEvent event) { |
| 10 | 272 |
| 273 lastClickedItem = null; | |
| 274 if (event.detail is DWT.CHECK) { | |
| 275 TreeItem item = cast(TreeItem) event.item; | |
| 276 lastClickedItem = item; | |
| 277 super.handleSelect(event); | |
| 278 | |
| 279 Object data = item.getData(); | |
| 280 if (data !is null) { | |
| 281 fireCheckStateChanged(new CheckStateChangedEvent(this, data, | |
| 282 item.getChecked())); | |
| 283 } | |
| 284 } else { | |
| 285 super.handleSelect(event); | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 /** | |
| 290 * Gathers the checked states of the given widget and its | |
| 291 * descendents, following a pre-order traversal of the tree. | |
| 292 * | |
| 293 * @param result a writable list of elements (element type: <code>Object</code>) | |
| 294 * @param widget the widget | |
| 295 */ | |
| 296 private void internalCollectChecked(Seq!(Object) result, Widget widget) { | |
| 297 Item[] items = getChildren(widget); | |
| 298 for (int i = 0; i < items.length; i++) { | |
| 299 Item item = items[i]; | |
| 300 if ( null !is cast(TreeItem)item && (cast(TreeItem) item).getChecked()) { | |
| 301 Object data = item.getData(); | |
| 302 if (data !is null) { | |
| 303 result.append(data); | |
| 304 } | |
| 305 } | |
| 306 internalCollectChecked(result, item); | |
| 307 } | |
| 308 } | |
| 309 | |
| 310 /** | |
| 311 * Gathers the grayed states of the given widget and its | |
| 312 * descendents, following a pre-order traversal of the tree. | |
| 313 * | |
| 314 * @param result a writable list of elements (element type: <code>Object</code>) | |
| 315 * @param widget the widget | |
| 316 */ | |
| 317 private void internalCollectGrayed(Seq!(Object) result, Widget widget) { | |
| 318 Item[] items = getChildren(widget); | |
| 319 for (int i = 0; i < items.length; i++) { | |
| 320 Item item = items[i]; | |
| 321 if (null !is cast(TreeItem)item && (cast(TreeItem) item).getGrayed()) { | |
| 322 Object data = item.getData(); | |
| 323 if (data !is null) { | |
| 324 result.append(data); | |
| 325 } | |
| 326 } | |
| 327 internalCollectGrayed(result, item); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 /** | |
| 332 * Sets the checked state of all items to correspond to the given set of checked elements. | |
| 333 * | |
| 334 * @param checkedElements the set (element type: <code>Object</code>) of elements which are checked | |
| 335 * @param widget the widget | |
| 336 */ | |
| 337 private void internalSetChecked(CustomHashtable checkedElements, | |
| 338 Widget widget) { | |
| 339 Item[] items = getChildren(widget); | |
| 340 for (int i = 0; i < items.length; i++) { | |
| 341 TreeItem item = cast(TreeItem) items[i]; | |
| 342 Object data = item.getData(); | |
| 343 if (data !is null) { | |
| 344 bool checked = checkedElements.containsKey(data); | |
| 345 if (checked !is item.getChecked()) { | |
| 346 item.setChecked(checked); | |
| 347 } | |
| 348 } | |
| 349 internalSetChecked(checkedElements, item); | |
| 350 } | |
| 351 } | |
| 352 | |
| 353 /** | |
| 354 * Sets the grayed state of all items to correspond to the given set of grayed elements. | |
| 355 * | |
| 356 * @param grayedElements the set (element type: <code>Object</code>) of elements which are grayed | |
| 357 * @param widget the widget | |
| 358 */ | |
| 359 private void internalSetGrayed(CustomHashtable grayedElements, Widget widget) { | |
| 360 Item[] items = getChildren(widget); | |
| 361 for (int i = 0; i < items.length; i++) { | |
| 362 TreeItem item = cast(TreeItem) items[i]; | |
| 363 Object data = item.getData(); | |
| 364 if (data !is null) { | |
| 365 bool grayed = grayedElements.containsKey(data); | |
| 366 if (grayed !is item.getGrayed()) { | |
| 367 item.setGrayed(grayed); | |
| 368 } | |
| 369 } | |
| 370 internalSetGrayed(grayedElements, item); | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 /* (non-Javadoc) | |
| 375 * Method declared on Viewer. | |
| 376 */ | |
|
43
ea8ff534f622
Fix override and super aliases
Frank Benoit <benoit@tionex.de>
parents:
39
diff
changeset
|
377 protected override void preservingSelection(Runnable updateCode) { |
| 10 | 378 |
| 379 int n = getItemCount(getControl()); | |
| 380 CustomHashtable checkedNodes = newHashtable(n * 2 + 1); | |
| 381 CustomHashtable grayedNodes = newHashtable(n * 2 + 1); | |
| 382 | |
| 383 gatherState(checkedNodes, grayedNodes, getControl()); | |
| 384 | |
| 385 super.preservingSelection(updateCode); | |
| 386 | |
| 387 applyState(checkedNodes, grayedNodes, getControl()); | |
| 388 } | |
| 389 | |
| 390 /* (non-Javadoc) | |
| 391 * Method declared on ICheckable. | |
| 392 */ | |
| 393 public void removeCheckStateListener(ICheckStateListener listener) { | |
| 394 checkStateListeners.remove(cast(Object)listener); | |
| 395 } | |
| 396 | |
| 397 /* (non-Javadoc) | |
| 398 * Method declared on ICheckable. | |
| 399 */ | |
| 400 public bool setChecked(Object element, bool state) { | |
| 401 Assert.isNotNull(element); | |
| 402 Widget widget = internalExpand(element, false); | |
| 403 if ( auto ti = cast(TreeItem) widget ) { | |
| 404 ti.setChecked(state); | |
| 405 return true; | |
| 406 } | |
| 407 return false; | |
| 408 } | |
| 409 | |
| 410 /** | |
| 411 * Sets the checked state for the children of the given item. | |
| 412 * | |
| 413 * @param item the item | |
| 414 * @param state <code>true</code> if the item should be checked, | |
| 415 * and <code>false</code> if it should be unchecked | |
| 416 */ | |
| 417 private void setCheckedChildren(Item item, bool state) { | |
| 418 createChildren(item); | |
| 419 Item[] items = getChildren(item); | |
| 420 if (items !is null) { | |
| 421 for (int i = 0; i < items.length; i++) { | |
| 422 Item it = items[i]; | |
| 423 if (it.getData() !is null && (null !is cast(TreeItem)it )) { | |
| 424 TreeItem treeItem = cast(TreeItem) it; | |
| 425 treeItem.setChecked(state); | |
| 426 setCheckedChildren(treeItem, state); | |
| 427 } | |
| 428 } | |
| 429 } | |
| 430 } | |
| 431 | |
| 432 /** | |
| 433 * Sets which elements are checked in this viewer's tree. | |
| 434 * The given list contains the elements that are to be checked; | |
| 435 * all other elements are to be unchecked. | |
| 436 * Does not fire events to check state listeners. | |
| 437 * <p> | |
| 438 * This method is typically used when restoring the interesting | |
| 439 * state of a viewer captured by an earlier call to <code>getCheckedElements</code>. | |
| 440 * </p> | |
| 441 * | |
| 442 * @param elements the array of checked elements | |
| 443 * @see #getCheckedElements | |
| 444 */ | |
| 445 public void setCheckedElements(Object[] elements) { | |
| 446 assertElementsNotNull(elements); | |
| 447 CustomHashtable checkedElements = newHashtable(elements.length * 2 + 1); | |
| 448 for (int i = 0; i < elements.length; ++i) { | |
| 449 Object element = elements[i]; | |
| 450 // Ensure item exists for element | |
| 451 internalExpand(element, false); | |
| 452 checkedElements.put(element, element); | |
| 453 } | |
| 454 Control tree = getControl(); | |
| 455 tree.setRedraw(false); | |
| 456 internalSetChecked(checkedElements, tree); | |
| 457 tree.setRedraw(true); | |
| 458 } | |
| 459 | |
| 460 /** | |
| 461 * Sets the grayed state for the given element in this viewer. | |
| 462 * | |
| 463 * @param element the element | |
| 464 * @param state <code>true</code> if the item should be grayed, | |
| 465 * and <code>false</code> if it should be ungrayed | |
| 466 * @return <code>true</code> if the gray state could be set, | |
| 467 * and <code>false</code> otherwise | |
| 468 */ | |
| 469 public bool setGrayed(Object element, bool state) { | |
| 470 Assert.isNotNull(element); | |
| 471 Widget widget = internalExpand(element, false); | |
| 472 if ( auto ti = cast(TreeItem) widget ) { | |
| 473 ti.setGrayed(state); | |
| 474 return true; | |
| 475 } | |
| 476 return false; | |
| 477 } | |
| 478 | |
| 479 /** | |
| 480 * Check and gray the selection rather than calling both | |
| 481 * setGrayed and setChecked as an optimization. | |
| 482 * Does not fire events to check state listeners. | |
| 483 * @param element the item being checked | |
| 484 * @param state a bool indicating selection or deselection | |
| 485 * @return bool indicating success or failure. | |
| 486 */ | |
| 487 public bool setGrayChecked(Object element, bool state) { | |
| 488 Assert.isNotNull(element); | |
| 489 Widget widget = internalExpand(element, false); | |
| 490 if (auto item = cast(TreeItem)widget ) { | |
| 491 item.setChecked(state); | |
| 492 item.setGrayed(state); | |
| 493 return true; | |
| 494 } | |
| 495 return false; | |
| 496 } | |
| 497 | |
| 498 /** | |
| 499 * Sets which elements are grayed in this viewer's tree. | |
| 500 * The given list contains the elements that are to be grayed; | |
| 501 * all other elements are to be ungrayed. | |
| 502 * <p> | |
| 503 * This method is typically used when restoring the interesting | |
| 504 * state of a viewer captured by an earlier call to <code>getGrayedElements</code>. | |
| 505 * </p> | |
| 506 * | |
| 507 * @param elements the array of grayed elements | |
| 508 * | |
| 509 * @see #getGrayedElements | |
| 510 */ | |
| 511 public void setGrayedElements(Object[] elements) { | |
| 512 assertElementsNotNull(elements); | |
| 513 CustomHashtable grayedElements = newHashtable(elements.length * 2 + 1); | |
| 514 for (int i = 0; i < elements.length; ++i) { | |
| 515 Object element = elements[i]; | |
| 516 // Ensure item exists for element | |
| 517 internalExpand(element, false); | |
| 518 grayedElements.put(element, element); | |
| 519 } | |
| 520 Control tree = getControl(); | |
| 521 tree.setRedraw(false); | |
| 522 internalSetGrayed(grayedElements, tree); | |
| 523 tree.setRedraw(true); | |
| 524 } | |
| 525 | |
| 526 /** | |
| 527 * Sets the grayed state for the given element and its parents | |
| 528 * in this viewer. | |
| 529 * | |
| 530 * @param element the element | |
| 531 * @param state <code>true</code> if the item should be grayed, | |
| 532 * and <code>false</code> if it should be ungrayed | |
| 533 * @return <code>true</code> if the element is visible and the gray | |
| 534 * state could be set, and <code>false</code> otherwise | |
| 535 * @see #setGrayed | |
| 536 */ | |
| 537 public bool setParentsGrayed(Object element, bool state) { | |
| 538 Assert.isNotNull(element); | |
| 539 Widget widget = internalExpand(element, false); | |
| 540 if (auto item = cast(TreeItem) widget ) { | |
| 541 item.setGrayed(state); | |
| 542 item = item.getParentItem(); | |
| 543 while (item !is null) { | |
| 544 item.setGrayed(state); | |
| 545 item = item.getParentItem(); | |
| 546 } | |
| 547 return true; | |
| 548 } | |
| 549 return false; | |
| 550 } | |
| 551 | |
| 552 /** | |
| 553 * Sets the checked state for the given element and its visible | |
| 554 * children in this viewer. | |
| 555 * Assumes that the element has been expanded before. To enforce | |
| 556 * that the item is expanded, call <code>expandToLevel</code> | |
| 557 * for the element. | |
| 558 * Does not fire events to check state listeners. | |
| 559 * | |
| 560 * @param element the element | |
| 561 * @param state <code>true</code> if the item should be checked, | |
| 562 * and <code>false</code> if it should be unchecked | |
| 563 * @return <code>true</code> if the checked state could be set, | |
| 564 * and <code>false</code> otherwise | |
| 565 */ | |
| 566 public bool setSubtreeChecked(Object element, bool state) { | |
| 567 Widget widget = internalExpand(element, false); | |
| 568 if (auto item = cast(TreeItem) widget ) { | |
| 569 item.setChecked(state); | |
| 570 setCheckedChildren(item, state); | |
| 571 return true; | |
| 572 } | |
| 573 return false; | |
| 574 } | |
| 575 | |
| 576 /** | |
| 577 * Sets to the given value the checked state for all elements in this viewer. | |
| 578 * Does not fire events to check state listeners. | |
| 579 * | |
| 580 * @param state <code>true</code> if the element should be checked, | |
| 581 * and <code>false</code> if it should be unchecked | |
| 582 * | |
| 583 * @since 3.2 | |
| 584 */ | |
| 585 public void setAllChecked(bool state) { | |
| 586 setAllChecked(state, getTree().getItems()); | |
| 587 | |
| 588 } | |
| 589 | |
| 590 /** | |
| 591 * Set the checked state of items and their children to state. | |
| 592 * @param state | |
| 593 * @param items | |
| 594 */ | |
| 595 private void setAllChecked(bool state, TreeItem[] items) { | |
| 596 for (int i = 0; i < items.length; i++) { | |
| 597 items[i].setChecked(state); | |
| 598 TreeItem[] children = items[i].getItems(); | |
| 599 setAllChecked(state, children); | |
| 600 } | |
| 601 } | |
| 602 } |