1 /*
2 * Copyright (c) 2012, 2017, 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 javafx.scene.control;
27
28 import com.sun.javafx.collections.MappingChange;
29 import com.sun.javafx.collections.NonIterableChange;
30 import com.sun.javafx.scene.control.Properties;
31 import com.sun.javafx.scene.control.SelectedCellsMap;
32
33 import com.sun.javafx.scene.control.behavior.TableCellBehavior;
34 import com.sun.javafx.scene.control.behavior.TableCellBehaviorBase;
35 import com.sun.javafx.scene.control.behavior.TreeTableCellBehavior;
36 import javafx.beans.property.DoubleProperty;
37 import javafx.css.CssMetaData;
38 import javafx.css.PseudoClass;
39
40 import javafx.css.converter.SizeConverter;
41 import com.sun.javafx.scene.control.ReadOnlyUnbackedObservableList;
42 import com.sun.javafx.scene.control.TableColumnComparatorBase;
43
44 import javafx.css.Styleable;
45 import javafx.css.StyleableDoubleProperty;
46 import javafx.css.StyleableProperty;
47 import javafx.event.WeakEventHandler;
48
49 import javafx.scene.control.skin.TreeTableViewSkin;
50
51 import java.lang.ref.SoftReference;
52 import java.lang.ref.WeakReference;
53 import java.util.ArrayList;
54 import java.util.Collection;
55 import java.util.Collections;
56 import java.util.Comparator;
57 import java.util.HashMap;
58 import java.util.LinkedHashSet;
59 import java.util.List;
60 import java.util.Map;
61 import java.util.Set;
62 import java.util.WeakHashMap;
63
64 import javafx.application.Platform;
65 import javafx.beans.DefaultProperty;
66 import javafx.beans.InvalidationListener;
67 import javafx.beans.WeakInvalidationListener;
68 import javafx.beans.property.BooleanProperty;
69 import javafx.beans.property.ObjectProperty;
70 import javafx.beans.property.ObjectPropertyBase;
71 import javafx.beans.property.ReadOnlyIntegerProperty;
72 import javafx.beans.property.ReadOnlyIntegerWrapper;
73 import javafx.beans.property.ReadOnlyObjectProperty;
74 import javafx.beans.property.ReadOnlyObjectWrapper;
75 import javafx.beans.property.SimpleBooleanProperty;
76 import javafx.beans.property.SimpleObjectProperty;
77 import javafx.beans.value.ChangeListener;
78 import javafx.beans.value.WeakChangeListener;
79 import javafx.beans.value.WritableValue;
80 import javafx.collections.FXCollections;
81 import javafx.collections.ListChangeListener;
82 import javafx.collections.MapChangeListener;
83 import javafx.collections.ObservableList;
84 import javafx.collections.WeakListChangeListener;
85 import javafx.event.Event;
86 import javafx.event.EventHandler;
87 import javafx.event.EventType;
88 import javafx.scene.AccessibleAttribute;
89 import javafx.scene.AccessibleRole;
90 import javafx.scene.Node;
91 import javafx.scene.layout.Region;
92 import javafx.util.Callback;
93
94 /**
95 * The TreeTableView control is designed to visualize an unlimited number of rows
96 * of data, broken out into columns. The TreeTableView control is conceptually
97 * very similar to the {@link TreeView} and {@link TableView} controls,
98 * and as you read on you'll come to see the APIs are largely the same.
99 * However, to give a high-level overview, you'll note that the TreeTableView
100 * uses the same {@link TreeItem} API as {@link TreeView},
101 * and that you therefore are required to simply set the
102 * {@link #rootProperty() root node} in the TreeTableView. Similarly, the
103 * TreeTableView control makes use of the same TableColumn-based approach that
104 * the {@link TableView} control uses, except instead of using the
105 * TableView-specific {@link TableColumn} class, you should instead use the
106 * TreeTableView-specific {@link TreeTableColumn} class instead. For an
107 * example on how to create a TreeTableView instance, refer to the 'Creating a
108 * TreeTableView' control section below.
109 *
110 * <p>As with the {@link TableView} control, the TreeTableView control has a
111 * number of features, including:
112 * <ul>
113 * <li>Powerful {@link TreeTableColumn} API:
114 * <ul>
115 * <li>Support for {@link TreeTableColumn#cellFactoryProperty() cell factories} to
116 * easily customize {@link Cell cell} contents in both rendering and editing
117 * states.
118 * <li>Specification of {@link TreeTableColumn#minWidthProperty() minWidth}/
119 * {@link TreeTableColumn#prefWidthProperty() prefWidth}/
120 * {@link TreeTableColumn#maxWidthProperty() maxWidth},
121 * and also {@link TreeTableColumn#resizableProperty() fixed width columns}.
122 * <li>Width resizing by the user at runtime.
123 * <li>Column reordering by the user at runtime.
124 * <li>Built-in support for {@link TreeTableColumn#getColumns() column nesting}
125 * </ul>
126 * <li>Different {@link #columnResizePolicyProperty() resizing policies} to
127 * dictate what happens when the user resizes columns.
128 * <li>Support for {@link #getSortOrder() multiple column sorting} by clicking
129 * the column header (hold down Shift keyboard key whilst clicking on a
130 * header to sort by multiple columns).
131 * </ul>
132 *
133 * <h2>Creating a TreeTableView</h2>
134 *
135 * <p>Creating a TreeTableView is a multi-step process, and also depends on the
136 * underlying data model needing to be represented. For this example we'll use
137 * the TreeTableView to visualise a file system, and will therefore make use
138 * of an imaginary (and vastly simplified) File class as defined below:
139 *
140 * <pre>{@code
141 * public class File {
142 * private StringProperty name;
143 * public void setName(String value) { nameProperty().set(value); }
144 * public String getName() { return nameProperty().get(); }
145 * public StringProperty nameProperty() {
146 * if (name == null) name = new SimpleStringProperty(this, "name");
147 * return name;
148 * }
149 *
150 * private LongProperty lastModified;
151 * public void setLastModified(long value) { lastModifiedProperty().set(value); }
152 * public long getLastModified() { return lastModifiedProperty().get(); }
153 * public LongProperty lastModifiedProperty() {
154 * if (lastModified == null) lastModified = new SimpleLongProperty(this, "lastModified");
155 * return lastModified;
156 * }
157 * }}</pre>
158 *
159 * <p>Firstly, a TreeTableView instance needs to be defined, as such:
160 *
161 * <pre>{@code
162 * TreeTableView<File> treeTable = new TreeTableView<>();}</pre>
163 *
164 * <p>With the basic TreeTableView instantiated, we next focus on the data model.
165 * As mentioned, for this example, we'll be representing a file system using File
166 * instances. To do this, we need to define the root node of the tree table, as such:
167 *
168 * <pre>{@code
169 * TreeItem<File> root = new TreeItem<>(new File("/"));
170 * treeTable.setRoot(root);}</pre>
171 *
172 * <p>With the root set as such, the TreeTableView will automatically update whenever
173 * the {@link TreeItem#getChildren() children} of the root changes.
174 *
175 * <p>At this point we now have a TreeTableView hooked up to observe the root
176 * TreeItem instance. The missing ingredient
177 * now is the means of splitting out the data contained within the model and
178 * representing it in one or more {@link TreeTableColumn} instances. To
179 * create a two-column TreeTableView to show the file name and last modified
180 * properties, we extend the code shown above as follows:
181 *
182 * <pre>{@code
183 * TreeTableColumns<File,String> fileNameCol = new TreeTableColumn<>("Filename");
184 * TreeTableColumns<File,Long> lastModifiedCol = new TreeTableColumn<>("Size");
185 *
186 * table.getColumns().setAll(fileNameCol, lastModifiedCol);}</pre>
187 *
188 * <p>With the code shown above we have nearly fully defined the minimum properties
189 * required to create a TreeTableView instance. The only thing missing is the
190 * {@link javafx.scene.control.TreeTableColumn#cellValueFactoryProperty() cell value factories}
191 * for the two columns - it is these that are responsible for determining the value
192 * of a cell in a given row. Commonly these can be specified using the
193 * {@link javafx.scene.control.cell.TreeItemPropertyValueFactory} class, but
194 * failing that you can also create an anonymous inner class and do whatever is
195 * necessary. For example, using {@link javafx.scene.control.cell.TreeItemPropertyValueFactory}
196 * you would do the following:
197 *
198 * <pre>{@code
199 * fileNameCol.setCellValueFactory(new TreeItemPropertyValueFactory("name"));
200 * lastModifiedCol.setCellValueFactory(new TreeItemPropertyValueFactory("lastModified"));}</pre>
201 *
202 * Running this code (assuming the file system structure is probably built up in
203 * memory) will result in a TreeTableView being shown with two columns for name
204 * and lastModified. Any other properties of the File class will not be shown, as
205 * no TreeTableColumns are defined for them.
206 *
207 * <h3>TreeTableView support for classes that don't contain properties</h3>
208 *
209 * <p>The code shown above is the shortest possible code for creating a TreeTableView
210 * when the domain objects are designed with JavaFX properties in mind
211 * (additionally, {@link javafx.scene.control.cell.TreeItemPropertyValueFactory} supports
212 * normal JavaBean properties too, although there is a caveat to this, so refer
213 * to the class documentation for more information). When this is not the case,
214 * it is necessary to provide a custom cell value factory. More information
215 * about cell value factories can be found in the {@link TreeTableColumn} API
216 * documentation, but briefly, here is how a TreeTableColumns could be specified:
217 *
218 * <pre>{@code
219 * firstNameCol.setCellValueFactory(new Callback<CellDataFeatures<Person, String>, ObservableValue<String>>() {
220 * public ObservableValue<String> call(CellDataFeatures<Person, String> p) {
221 * // p.getValue() returns the TreeItem<Person> instance for a particular TreeTableView row,
222 * // p.getValue().getValue() returns the Person instance inside the TreeItem<Person>
223 * return p.getValue().getValue().firstNameProperty();
224 * }
225 * });
226 * }}</pre>
227 *
228 * <h3>TreeTableView Selection / Focus APIs</h3>
229 * <p>To track selection and focus, it is necessary to become familiar with the
230 * {@link SelectionModel} and {@link FocusModel} classes. A TreeTableView has at most
231 * one instance of each of these classes, available from
232 * {@link #selectionModelProperty() selectionModel} and
233 * {@link #focusModelProperty() focusModel} properties, respectively.
234 * Whilst it is possible to use this API to set a new selection model, in
235 * most circumstances this is not necessary - the default selection and focus
236 * models should work in most circumstances.
237 *
238 * <p>The default {@link SelectionModel} used when instantiating a TreeTableView is
239 * an implementation of the {@link MultipleSelectionModel} abstract class.
240 * However, as noted in the API documentation for
241 * the {@link MultipleSelectionModel#selectionModeProperty() selectionMode}
242 * property, the default value is {@link SelectionMode#SINGLE}. To enable
243 * multiple selection in a default TreeTableView instance, it is therefore necessary
244 * to do the following:
245 *
246 * <pre>
247 * {@code
248 * treeTableView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);}</pre>
249 *
250 * <h3>Customizing TreeTableView Visuals</h3>
251 * <p>The visuals of the TreeTableView can be entirely customized by replacing the
252 * default {@link #rowFactoryProperty() row factory}. A row factory is used to
253 * generate {@link TreeTableRow} instances, which are used to represent an entire
254 * row in the TreeTableView.
255 *
256 * <p>In many cases, this is not what is desired however, as it is more commonly
257 * the case that cells be customized on a per-column basis, not a per-row basis.
258 * It is therefore important to note that a {@link TreeTableRow} is not a
259 * {@link TreeTableCell}. A {@link TreeTableRow} is simply a container for zero or more
260 * {@link TreeTableCell}, and in most circumstances it is more likely that you'll
261 * want to create custom TreeTableCells, rather than TreeTableRows. The primary use case
262 * for creating custom TreeTableRow instances would most probably be to introduce
263 * some form of column spanning support.
264 *
265 * <p>You can create custom {@link TreeTableCell} instances per column by assigning
266 * the appropriate function to the TreeTableColumns
267 * {@link TreeTableColumn#cellFactoryProperty() cell factory} property.
268 *
269 * <p>See the {@link Cell} class documentation for a more complete
270 * description of how to write custom Cells.
271 *
272 * <h3>Editing</h3>
273 * <p>This control supports inline editing of values, and this section attempts to
274 * give an overview of the available APIs and how you should use them.</p>
275 *
276 * <p>Firstly, cell editing most commonly requires a different user interface
277 * than when a cell is not being edited. This is the responsibility of the
278 * {@link Cell} implementation being used. For TreeTableView, it is highly
279 * recommended that editing be
280 * {@link javafx.scene.control.TreeTableColumn#cellFactoryProperty() per-TreeTableColumn},
281 * rather than {@link #rowFactoryProperty() per row}, as more often than not
282 * you want users to edit each column value differently, and this approach allows
283 * for editors specific to each column. It is your choice whether the cell is
284 * permanently in an editing state (e.g. this is common for {@link CheckBox} cells),
285 * or to switch to a different UI when editing begins (e.g. when a double-click
286 * is received on a cell).</p>
287 *
288 * <p>To know when editing has been requested on a cell,
289 * simply override the {@link javafx.scene.control.Cell#startEdit()} method, and
290 * update the cell {@link javafx.scene.control.Cell#textProperty() text} and
291 * {@link javafx.scene.control.Cell#graphicProperty() graphic} properties as
292 * appropriate (e.g. set the text to null and set the graphic to be a
293 * {@link TextField}). Additionally, you should also override
294 * {@link Cell#cancelEdit()} to reset the UI back to its original visual state
295 * when the editing concludes. In both cases it is important that you also
296 * ensure that you call the super method to have the cell perform all duties it
297 * must do to enter or exit its editing mode.</p>
298 *
299 * <p>Once your cell is in an editing state, the next thing you are most probably
300 * interested in is how to commit or cancel the editing that is taking place. This is your
301 * responsibility as the cell factory provider. Your cell implementation will know
302 * when the editing is over, based on the user input (e.g. when the user presses
303 * the Enter or ESC keys on their keyboard). When this happens, it is your
304 * responsibility to call {@link Cell#commitEdit(Object)} or
305 * {@link Cell#cancelEdit()}, as appropriate.</p>
306 *
307 * <p>When you call {@link Cell#commitEdit(Object)} an event is fired to the
308 * TreeTableView, which you can observe by adding an {@link EventHandler} via
309 * {@link TreeTableColumn#setOnEditCommit(javafx.event.EventHandler)}. Similarly,
310 * you can also observe edit events for
311 * {@link TreeTableColumn#setOnEditStart(javafx.event.EventHandler) edit start}
312 * and {@link TreeTableColumn#setOnEditCancel(javafx.event.EventHandler) edit cancel}.</p>
313 *
314 * <p>By default the TreeTableColumn edit commit handler is non-null, with a default
315 * handler that attempts to overwrite the property value for the
316 * item in the currently-being-edited row. It is able to do this as the
317 * {@link Cell#commitEdit(Object)} method is passed in the new value, and this
318 * is passed along to the edit commit handler via the
319 * {@link javafx.scene.control.TreeTableColumn.CellEditEvent CellEditEvent} that is
320 * fired. It is simply a matter of calling
321 * {@link javafx.scene.control.TreeTableColumn.CellEditEvent#getNewValue()} to
322 * retrieve this value.
323 *
324 * <p>It is very important to note that if you call
325 * {@link TreeTableColumn#setOnEditCommit(javafx.event.EventHandler)} with your own
326 * {@link EventHandler}, then you will be removing the default handler. Unless
327 * you then handle the writeback to the property (or the relevant data source),
328 * nothing will happen. You can work around this by using the
329 * {@link TreeTableColumn#addEventHandler(javafx.event.EventType, javafx.event.EventHandler)}
330 * method to add a {@link TreeTableColumn#EDIT_COMMIT_EVENT} {@link EventType} with
331 * your desired {@link EventHandler} as the second argument. Using this method,
332 * you will not replace the default implementation, but you will be notified when
333 * an edit commit has occurred.</p>
334 *
335 * <p>Hopefully this summary answers some of the commonly asked questions.
336 * Fortunately, JavaFX ships with a number of pre-built cell factories that
337 * handle all the editing requirements on your behalf. You can find these
338 * pre-built cell factories in the javafx.scene.control.cell package.</p>
339 *
340 * @see TreeTableColumn
341 * @see TreeTablePosition
342 * @param <S> The type of the TreeItem instances used in this TreeTableView.
343 * @since JavaFX 8.0
344 */
345 @DefaultProperty("root")
346 public class TreeTableView<S> extends Control {
347
348 /***************************************************************************
349 * *
350 * Constructors *
351 * *
352 **************************************************************************/
353
354 /**
355 * Creates an empty TreeTableView.
356 *
357 * <p>Refer to the {@link TreeTableView} class documentation for details on the
358 * default state of other properties.
359 */
360 public TreeTableView() {
361 this(null);
362 }
363
364 /**
365 * Creates a TreeTableView with the provided root node.
366 *
367 * <p>Refer to the {@link TreeTableView} class documentation for details on the
368 * default state of other properties.
369 *
370 * @param root The node to be the root in this TreeTableView.
371 */
372 public TreeTableView(TreeItem<S> root) {
373 getStyleClass().setAll(DEFAULT_STYLE_CLASS);
374 setAccessibleRole(AccessibleRole.TREE_TABLE_VIEW);
375
376 setRoot(root);
377 updateExpandedItemCount(root);
378
379 // install default selection and focus models - it's unlikely this will be changed
380 // by many users.
381 setSelectionModel(new TreeTableViewArrayListSelectionModel<S>(this));
382 setFocusModel(new TreeTableViewFocusModel<S>(this));
383
384 // we watch the columns list, such that when it changes we can update
385 // the leaf columns and visible leaf columns lists (which are read-only).
386 getColumns().addListener(weakColumnsObserver);
387
388 // watch for changes to the sort order list - and when it changes run
389 // the sort method.
390 getSortOrder().addListener((ListChangeListener.Change<? extends TreeTableColumn<S, ?>> c) -> {
391 doSort(TableUtil.SortEventType.SORT_ORDER_CHANGE, c);
392 });
393
394 // We're watching for changes to the content width such
395 // that the resize policy can be run if necessary. This comes from
396 // TreeTableViewSkin.
397 getProperties().addListener((MapChangeListener<Object, Object>) c -> {
398 if (c.wasAdded() && TableView.SET_CONTENT_WIDTH.equals(c.getKey())) {
399 if (c.getValueAdded() instanceof Number) {
400 setContentWidth((Double) c.getValueAdded());
401 }
402 getProperties().remove(TableView.SET_CONTENT_WIDTH);
403 }
404 });
405
406 isInited = true;
407 }
408
409
410
411 /***************************************************************************
412 * *
413 * Static properties and methods *
414 * *
415 **************************************************************************/
416
417 /**
418 * An EventType that indicates some edit event has occurred. It is the parent
419 * type of all other edit events: {@link #editStartEvent},
420 * {@link #editCommitEvent} and {@link #editCancelEvent}.
421 *
422 * @param <S> The type of the TreeItem instances used in this TreeTableView
423 * @return An EventType that indicates some edit event has occurred
424 */
425 @SuppressWarnings("unchecked")
426 public static <S> EventType<TreeTableView.EditEvent<S>> editAnyEvent() {
427 return (EventType<TreeTableView.EditEvent<S>>) EDIT_ANY_EVENT;
428 }
429 private static final EventType<?> EDIT_ANY_EVENT =
430 new EventType<>(Event.ANY, "TREE_TABLE_VIEW_EDIT");
431
432 /**
433 * An EventType used to indicate that an edit event has started within the
434 * TreeTableView upon which the event was fired.
435 *
436 * @param <S> The type of the TreeItem instances used in this TreeTableView
437 * @return An EventType used to indicate that an edit event has started
438 */
439 @SuppressWarnings("unchecked")
440 public static <S> EventType<TreeTableView.EditEvent<S>> editStartEvent() {
441 return (EventType<TreeTableView.EditEvent<S>>) EDIT_START_EVENT;
442 }
443 private static final EventType<?> EDIT_START_EVENT =
444 new EventType<>(editAnyEvent(), "EDIT_START");
445
446 /**
447 * An EventType used to indicate that an edit event has just been canceled
448 * within the TreeTableView upon which the event was fired.
449 *
450 * @param <S> The type of the TreeItem instances used in this TreeTableView
451 * @return An EventType used to indicate that an edit event has just been
452 * canceled
453 */
454 @SuppressWarnings("unchecked")
455 public static <S> EventType<TreeTableView.EditEvent<S>> editCancelEvent() {
456 return (EventType<TreeTableView.EditEvent<S>>) EDIT_CANCEL_EVENT;
457 }
458 private static final EventType<?> EDIT_CANCEL_EVENT =
459 new EventType<>(editAnyEvent(), "EDIT_CANCEL");
460
461 /**
462 * An EventType that is used to indicate that an edit in a TreeTableView has been
463 * committed. This means that user has made changes to the data of a
464 * TreeItem, and that the UI should be updated.
465 *
466 * @param <S> The type of the TreeItem instances used in this TreeTableView
467 * @return An EventType that is used to indicate that an edit in a TreeTableView
468 * has been committed
469 */
470 @SuppressWarnings("unchecked")
471 public static <S> EventType<TreeTableView.EditEvent<S>> editCommitEvent() {
472 return (EventType<TreeTableView.EditEvent<S>>) EDIT_COMMIT_EVENT;
473 }
474 private static final EventType<?> EDIT_COMMIT_EVENT =
475 new EventType<>(editAnyEvent(), "EDIT_COMMIT");
476
477 /**
478 * Returns the number of levels of 'indentation' of the given TreeItem,
479 * based on how many times {@link javafx.scene.control.TreeItem#getParent()}
480 * can be recursively called. If the TreeItem does not have any parent set,
481 * the returned value will be zero. For each time getParent() is recursively
482 * called, the returned value is incremented by one.
483 *
484 * <p><strong>Important note: </strong>This method is deprecated as it does
485 * not consider the root node. This means that this method will iterate
486 * past the root node of the TreeTableView control, if the root node has a parent.
487 * If this is important, call {@link TreeTableView#getTreeItemLevel(TreeItem)}
488 * instead.
489 *
490 * @param node The TreeItem for which the level is needed.
491 * @return An integer representing the number of parents above the given node,
492 * or -1 if the given TreeItem is null.
493 * @deprecated This method does not correctly calculate the distance from the
494 * given TreeItem to the root of the TreeTableView. As of JavaFX 8.0_20,
495 * the proper way to do this is via
496 * {@link TreeTableView#getTreeItemLevel(TreeItem)}
497 */
498 @Deprecated(since="8u20")
499 public static int getNodeLevel(TreeItem<?> node) {
500 return TreeView.getNodeLevel(node);
501 }
502
503 /**
504 * <p>Very simple resize policy that just resizes the specified column by the
505 * provided delta and shifts all other columns (to the right of the given column)
506 * further to the right (when the delta is positive) or to the left (when the
507 * delta is negative).
508 *
509 * <p>It also handles the case where we have nested columns by sharing the new space,
510 * or subtracting the removed space, evenly between all immediate children columns.
511 * Of course, the immediate children may themselves be nested, and they would
512 * then use this policy on their children.
513 */
514 public static final Callback<TreeTableView.ResizeFeatures, Boolean> UNCONSTRAINED_RESIZE_POLICY =
515 new Callback<TreeTableView.ResizeFeatures, Boolean>() {
516
517 @Override public String toString() {
518 return "unconstrained-resize";
519 }
520
521 @Override public Boolean call(TreeTableView.ResizeFeatures prop) {
522 double result = TableUtil.resize(prop.getColumn(), prop.getDelta());
523 return Double.compare(result, 0.0) == 0;
524 }
525 };
526
527 /**
528 * <p>Simple policy that ensures the width of all visible leaf columns in
529 * this table sum up to equal the width of the table itself.
530 *
531 * <p>When the user resizes a column width with this policy, the table automatically
532 * adjusts the width of the right hand side columns. When the user increases a
533 * column width, the table decreases the width of the rightmost column until it
534 * reaches its minimum width. Then it decreases the width of the second
535 * rightmost column until it reaches minimum width and so on. When all right
536 * hand side columns reach minimum size, the user cannot increase the size of
537 * resized column any more.
538 */
539 public static final Callback<TreeTableView.ResizeFeatures, Boolean> CONSTRAINED_RESIZE_POLICY =
540 new Callback<TreeTableView.ResizeFeatures, Boolean>() {
541
542 private boolean isFirstRun = true;
543
544 @Override public String toString() {
545 return "constrained-resize";
546 }
547
548 @Override public Boolean call(TreeTableView.ResizeFeatures prop) {
549 TreeTableView<?> table = prop.getTable();
550 List<? extends TableColumnBase<?,?>> visibleLeafColumns = table.getVisibleLeafColumns();
551 Boolean result = TableUtil.constrainedResize(prop,
552 isFirstRun,
553 table.contentWidth,
554 visibleLeafColumns);
555 isFirstRun = ! isFirstRun ? false : ! result;
556 return result;
557 }
558 };
559
560 /**
561 * The default {@link #sortPolicyProperty() sort policy} that this TreeTableView
562 * will use if no other policy is specified. The sort policy is a simple
563 * {@link Callback} that accepts a TreeTableView as the sole argument and expects
564 * a Boolean response representing whether the sort succeeded or not. A Boolean
565 * response of true represents success, and a response of false (or null) will
566 * be considered to represent failure.
567 */
568 public static final Callback<TreeTableView, Boolean> DEFAULT_SORT_POLICY = new Callback<TreeTableView, Boolean>() {
569 @Override public Boolean call(TreeTableView table) {
570 try {
571 TreeItem rootItem = table.getRoot();
572 if (rootItem == null) return false;
573
574 TreeSortMode sortMode = table.getSortMode();
575 if (sortMode == null) return false;
576
577 rootItem.lastSortMode = sortMode;
578 rootItem.lastComparator = table.getComparator();
579 rootItem.sort();
580 return true;
581 } catch (UnsupportedOperationException e) {
582 // TODO might need to support other exception types including:
583 // ClassCastException - if the class of the specified element prevents it from being added to this list
584 // NullPointerException - if the specified element is null and this list does not permit null elements
585 // IllegalArgumentException - if some property of this element prevents it from being added to this list
586
587 // If we are here the list does not support sorting, so we gracefully
588 // fail the sort request and ensure the UI is put back to its previous
589 // state. This is handled in the code that calls the sort policy.
590
591 return false;
592 }
593 }
594 };
595
596
597
598 /***************************************************************************
599 * *
600 * Instance Variables *
601 * *
602 **************************************************************************/
603
604 // used in the tree item modification event listener. Used by the
605 // layoutChildren method to determine whether the tree item count should
606 // be recalculated.
607 private boolean expandedItemCountDirty = true;
608
609 // Used in the getTreeItem(int row) method to act as a cache.
610 // See RT-26716 for the justification and performance gains.
611 private Map<Integer, SoftReference<TreeItem<S>>> treeItemCacheMap = new HashMap<>();
612
613 // this is the only publicly writable list for columns. This represents the
614 // columns as they are given initially by the developer.
615 private final ObservableList<TreeTableColumn<S,?>> columns = FXCollections.observableArrayList();
616
617 // Finally, as convenience, we also have an observable list that contains
618 // only the leaf columns that are currently visible.
619 private final ObservableList<TreeTableColumn<S,?>> visibleLeafColumns = FXCollections.observableArrayList();
620 private final ObservableList<TreeTableColumn<S,?>> unmodifiableVisibleLeafColumns = FXCollections.unmodifiableObservableList(visibleLeafColumns);
621
622 // Allows for multiple column sorting based on the order of the TreeTableColumns
623 // in this observableArrayList. Each TreeTableColumn is responsible for whether it is
624 // sorted using ascending or descending order.
625 private ObservableList<TreeTableColumn<S,?>> sortOrder = FXCollections.observableArrayList();
626
627 // width of VirtualFlow minus the vbar width
628 // package protected for testing only
629 double contentWidth;
630
631 // Used to minimise the amount of work performed prior to the table being
632 // completely initialised. In particular it reduces the amount of column
633 // resize operations that occur, which slightly improves startup time.
634 private boolean isInited = false;
635
636
637
638 /***************************************************************************
639 * *
640 * Callbacks and Events *
641 * *
642 **************************************************************************/
643
644 // we use this to forward events that have bubbled up TreeItem instances
645 // to the TreeTableViewSkin, to force it to recalculate teh item count and redraw
646 // if necessary
647 private final EventHandler<TreeItem.TreeModificationEvent<S>> rootEvent = e -> {
648 // this forces layoutChildren at the next pulse, and therefore
649 // updates the item count if necessary
650 EventType<?> eventType = e.getEventType();
651 boolean match = false;
652 while (eventType != null) {
653 if (eventType.equals(TreeItem.<S>expandedItemCountChangeEvent())) {
654 match = true;
655 break;
656 }
657 eventType = eventType.getSuperType();
658 }
659
660 if (match) {
661 expandedItemCountDirty = true;
662 requestLayout();
663 }
664 };
665
666 private final ListChangeListener<TreeTableColumn<S,?>> columnsObserver = new ListChangeListener<TreeTableColumn<S,?>>() {
667 @Override public void onChanged(ListChangeListener.Change<? extends TreeTableColumn<S,?>> c) {
668 final List<TreeTableColumn<S,?>> columns = getColumns();
669
670 // Fix for RT-39822 - don't allow the same column to be installed twice
671 while (c.next()) {
672 if (c.wasAdded()) {
673 List<TreeTableColumn<S,?>> duplicates = new ArrayList<>();
674 for (TreeTableColumn<S,?> addedColumn : c.getAddedSubList()) {
675 if (addedColumn == null) continue;
676
677 int count = 0;
678 for (TreeTableColumn<S,?> column : columns) {
679 if (addedColumn == column) {
680 count++;
681 }
682 }
683
684 if (count > 1) {
685 duplicates.add(addedColumn);
686 }
687 }
688
689 if (!duplicates.isEmpty()) {
690 String titleList = "";
691 for (TreeTableColumn<S,?> dupe : duplicates) {
692 titleList += "'" + dupe.getText() + "', ";
693 }
694 throw new IllegalStateException("Duplicate TreeTableColumns detected in TreeTableView columns list with titles " + titleList);
695 }
696 }
697 }
698 c.reset();
699
700 // Fix for RT-15194: Need to remove removed columns from the
701 // sortOrder list.
702 List<TreeTableColumn<S,?>> toRemove = new ArrayList<TreeTableColumn<S,?>>();
703 while (c.next()) {
704 final List<? extends TreeTableColumn<S, ?>> removed = c.getRemoved();
705 final List<? extends TreeTableColumn<S, ?>> added = c.getAddedSubList();
706
707 if (c.wasRemoved()) {
708 toRemove.addAll(removed);
709 for (TreeTableColumn<S,?> tc : removed) {
710 tc.setTreeTableView(null);
711 }
712 }
713
714 if (c.wasAdded()) {
715 toRemove.removeAll(added);
716 for (TreeTableColumn<S,?> tc : added) {
717 tc.setTreeTableView(TreeTableView.this);
718 }
719 }
720
721 // set up listeners
722 TableUtil.removeColumnsListener(removed, weakColumnsObserver);
723 TableUtil.addColumnsListener(added, weakColumnsObserver);
724
725 TableUtil.removeTableColumnListener(c.getRemoved(),
726 weakColumnVisibleObserver,
727 weakColumnSortableObserver,
728 weakColumnSortTypeObserver,
729 weakColumnComparatorObserver);
730 TableUtil.addTableColumnListener(c.getAddedSubList(),
731 weakColumnVisibleObserver,
732 weakColumnSortableObserver,
733 weakColumnSortTypeObserver,
734 weakColumnComparatorObserver);
735 }
736
737 // We don't maintain a bind for leafColumns, we simply call this update
738 // function behind the scenes in the appropriate places.
739 updateVisibleLeafColumns();
740
741 sortOrder.removeAll(toRemove);
742
743 // Fix for RT-38892.
744 final TreeTableViewFocusModel<S> fm = getFocusModel();
745 final TreeTableViewSelectionModel<S> sm = getSelectionModel();
746 c.reset();
747
748 // we need to collect together all removed and all added columns, because
749 // the code below works on the actually removed columns. If we perform
750 // the code within this while loop, we'll be deselecting columns that
751 // should be deselected (because they have just moved place, for example).
752 List<TreeTableColumn<S,?>> removed = new ArrayList<>();
753 List<TreeTableColumn<S,?>> added = new ArrayList<>();
754 while (c.next()) {
755 if (c.wasRemoved()) {
756 removed.addAll(c.getRemoved());
757 }
758 if (c.wasAdded()) {
759 added.addAll(c.getAddedSubList());
760 }
761 }
762 removed.removeAll(added);
763
764
765 // Fix for focus - we simply move focus to a cell to the left
766 // of the focused cell if the focused cell was located within
767 // a column that has been removed.
768 if (fm != null) {
769 TreeTablePosition<S, ?> focusedCell = fm.getFocusedCell();
770 boolean match = false;
771 for (TreeTableColumn<S, ?> tc : removed) {
772 match = focusedCell != null && focusedCell.getTableColumn() == tc;
773 if (match) {
774 break;
775 }
776 }
777
778 if (match) {
779 int matchingColumnIndex = lastKnownColumnIndex.getOrDefault(focusedCell.getTableColumn(), 0);
780 int newFocusColumnIndex =
781 matchingColumnIndex == 0 ? 0 :
782 Math.min(getVisibleLeafColumns().size() - 1, matchingColumnIndex - 1);
783 fm.focus(focusedCell.getRow(), getVisibleLeafColumn(newFocusColumnIndex));
784 }
785 }
786
787 // Fix for selection - we remove selection from all cells that
788 // were within the removed column.
789 if (sm != null) {
790 List<TreeTablePosition> selectedCells = new ArrayList<>(sm.getSelectedCells());
791 for (TreeTablePosition selectedCell : selectedCells) {
792 boolean match = false;
793 for (TreeTableColumn<S, ?> tc : removed) {
794 match = selectedCell != null && selectedCell.getTableColumn() == tc;
795 if (match) break;
796 }
797
798 if (match) {
799 // we can't just use the selectedCell.getTableColumn(), as that
800 // column no longer exists and therefore its index is not correct.
801 int matchingColumnIndex = lastKnownColumnIndex.getOrDefault(selectedCell.getTableColumn(), -1);
802 if (matchingColumnIndex == -1) continue;
803
804 if (sm instanceof TreeTableViewArrayListSelectionModel) {
805 // Also, because the table column no longer exists in the columns
806 // list at this point, we can't just call:
807 // sm.clearSelection(selectedCell.getRow(), selectedCell.getTableColumn());
808 // as the tableColumn would map to an index of -1, which means that
809 // selection will not be cleared. Instead, we have to create
810 // a new TablePosition with a fixed column index and use that.
811 TreeTablePosition<S,?> fixedTablePosition =
812 new TreeTablePosition<S,Object>(TreeTableView.this,
813 selectedCell.getRow(),
814 selectedCell.getTableColumn());
815 fixedTablePosition.fixedColumnIndex = matchingColumnIndex;
816
817 ((TreeTableViewArrayListSelectionModel)sm).clearSelection(fixedTablePosition);
818 } else {
819 sm.clearSelection(selectedCell.getRow(), selectedCell.getTableColumn());
820 }
821 }
822 }
823 }
824
825
826 // update the lastKnownColumnIndex map
827 lastKnownColumnIndex.clear();
828 for (TreeTableColumn<S,?> tc : getColumns()) {
829 int index = getVisibleLeafIndex(tc);
830 if (index > -1) {
831 lastKnownColumnIndex.put(tc, index);
832 }
833 }
834 }
835 };
836
837 private final WeakHashMap<TreeTableColumn<S,?>, Integer> lastKnownColumnIndex = new WeakHashMap<>();
838
839 private final InvalidationListener columnVisibleObserver = valueModel -> {
840 updateVisibleLeafColumns();
841 };
842
843 private final InvalidationListener columnSortableObserver = valueModel -> {
844 TreeTableColumn col = (TreeTableColumn) ((BooleanProperty)valueModel).getBean();
845 if (! getSortOrder().contains(col)) return;
846 doSort(TableUtil.SortEventType.COLUMN_SORTABLE_CHANGE, col);
847 };
848
849 private final InvalidationListener columnSortTypeObserver = valueModel -> {
850 TreeTableColumn col = (TreeTableColumn) ((ObjectProperty)valueModel).getBean();
851 if (! getSortOrder().contains(col)) return;
852 doSort(TableUtil.SortEventType.COLUMN_SORT_TYPE_CHANGE, col);
853 };
854
855 private final InvalidationListener columnComparatorObserver = valueModel -> {
856 TreeTableColumn col = (TreeTableColumn) ((SimpleObjectProperty)valueModel).getBean();
857 if (! getSortOrder().contains(col)) return;
858 doSort(TableUtil.SortEventType.COLUMN_COMPARATOR_CHANGE, col);
859 };
860
861 /* proxy pseudo-class state change from selectionModel's cellSelectionEnabledProperty */
862 private final InvalidationListener cellSelectionModelInvalidationListener = o -> {
863 boolean isCellSelection = ((BooleanProperty)o).get();
864 pseudoClassStateChanged(PSEUDO_CLASS_CELL_SELECTION, isCellSelection);
865 pseudoClassStateChanged(PSEUDO_CLASS_ROW_SELECTION, !isCellSelection);
866 };
867
868 private WeakEventHandler<TreeItem.TreeModificationEvent<S>> weakRootEventListener;
869
870 private final WeakInvalidationListener weakColumnVisibleObserver =
871 new WeakInvalidationListener(columnVisibleObserver);
872
873 private final WeakInvalidationListener weakColumnSortableObserver =
874 new WeakInvalidationListener(columnSortableObserver);
875
876 private final WeakInvalidationListener weakColumnSortTypeObserver =
877 new WeakInvalidationListener(columnSortTypeObserver);
878
879 private final WeakInvalidationListener weakColumnComparatorObserver =
880 new WeakInvalidationListener(columnComparatorObserver);
881
882 private final WeakListChangeListener<TreeTableColumn<S,?>> weakColumnsObserver =
883 new WeakListChangeListener<TreeTableColumn<S,?>>(columnsObserver);
884
885 private final WeakInvalidationListener weakCellSelectionModelInvalidationListener =
886 new WeakInvalidationListener(cellSelectionModelInvalidationListener);
887
888
889
890 /***************************************************************************
891 * *
892 * Properties *
893 * *
894 **************************************************************************/
895
896 // --- Root
897 private ObjectProperty<TreeItem<S>> root = new SimpleObjectProperty<TreeItem<S>>(this, "root") {
898 private WeakReference<TreeItem<S>> weakOldItem;
899
900 @Override protected void invalidated() {
901 TreeItem<S> oldTreeItem = weakOldItem == null ? null : weakOldItem.get();
902 if (oldTreeItem != null && weakRootEventListener != null) {
903 oldTreeItem.removeEventHandler(TreeItem.<S>treeNotificationEvent(), weakRootEventListener);
904 }
905
906 TreeItem<S> root = getRoot();
907 if (root != null) {
908 weakRootEventListener = new WeakEventHandler<>(rootEvent);
909 getRoot().addEventHandler(TreeItem.<S>treeNotificationEvent(), weakRootEventListener);
910 weakOldItem = new WeakReference<>(root);
911 }
912
913 // Fix for RT-35763
914 getSortOrder().clear();
915
916 expandedItemCountDirty = true;
917 updateRootExpanded();
918 }
919 };
920
921 /**
922 * Sets the root node in this TreeTableView. See the {@link TreeItem} class level
923 * documentation for more details.
924 *
925 * @param value The {@link TreeItem} that will be placed at the root of the
926 * TreeTableView.
927 */
928 public final void setRoot(TreeItem<S> value) {
929 rootProperty().set(value);
930 }
931
932 /**
933 * Returns the current root node of this TreeTableView, or null if no root node
934 * is specified.
935 * @return The current root node, or null if no root node exists.
936 */
937 public final TreeItem<S> getRoot() {
938 return root == null ? null : root.get();
939 }
940
941 /**
942 * Property representing the root node of the TreeTableView.
943 * @return the root property
944 */
945 public final ObjectProperty<TreeItem<S>> rootProperty() {
946 return root;
947 }
948
949
950
951 // --- Show Root
952 private BooleanProperty showRoot;
953
954 /**
955 * Specifies whether the root {@code TreeItem} should be shown within this
956 * TreeTableView.
957 *
958 * @param value If true, the root TreeItem will be shown, and if false it
959 * will be hidden.
960 */
961 public final void setShowRoot(boolean value) {
962 showRootProperty().set(value);
963 }
964
965 /**
966 * Returns true if the root of the TreeTableView should be shown, and false if
967 * it should not. By default, the root TreeItem is visible in the TreeTableView.
968 * @return true if the root of the TreeTableView should be shown
969 */
970 public final boolean isShowRoot() {
971 return showRoot == null ? true : showRoot.get();
972 }
973
974 /**
975 * Property that represents whether or not the TreeTableView root node is visible.
976 * @return the show root property
977 */
978 public final BooleanProperty showRootProperty() {
979 if (showRoot == null) {
980 showRoot = new SimpleBooleanProperty(this, "showRoot", true) {
981 @Override protected void invalidated() {
982 updateRootExpanded();
983 updateExpandedItemCount(getRoot());
984 }
985 };
986 }
987 return showRoot;
988 }
989
990
991
992 // --- Tree Column
993 private ObjectProperty<TreeTableColumn<S,?>> treeColumn;
994 /**
995 * Property that represents which column should have the disclosure node
996 * shown in it (that is, the column with the arrow). By default this will be
997 * the left-most column if this property is null, otherwise it will be the
998 * specified column assuming it is non-null and contained within the
999 * {@link #getVisibleLeafColumns() visible leaf columns} list.
1000 * @return the tree column property
1001 */
1002 public final ObjectProperty<TreeTableColumn<S,?>> treeColumnProperty() {
1003 if (treeColumn == null) {
1004 treeColumn = new SimpleObjectProperty<>(this, "treeColumn", null);
1005 }
1006 return treeColumn;
1007 }
1008 public final void setTreeColumn(TreeTableColumn<S,?> value) {
1009 treeColumnProperty().set(value);
1010 }
1011 public final TreeTableColumn<S,?> getTreeColumn() {
1012 return treeColumn == null ? null : treeColumn.get();
1013 }
1014
1015
1016
1017 // --- Selection Model
1018 private ObjectProperty<TreeTableViewSelectionModel<S>> selectionModel;
1019
1020 /**
1021 * Sets the {@link MultipleSelectionModel} to be used in the TreeTableView.
1022 * Despite a TreeTableView requiring a <code><b>Multiple</b>SelectionModel</code>,
1023 * it is possible to configure it to only allow single selection (see
1024 * {@link MultipleSelectionModel#setSelectionMode(javafx.scene.control.SelectionMode)}
1025 * for more information).
1026 * @param value the {@link MultipleSelectionModel} to be used
1027 */
1028 public final void setSelectionModel(TreeTableViewSelectionModel<S> value) {
1029 selectionModelProperty().set(value);
1030 }
1031
1032 /**
1033 * Returns the currently installed selection model.
1034 * @return the currently installed selection model
1035 */
1036 public final TreeTableViewSelectionModel<S> getSelectionModel() {
1037 return selectionModel == null ? null : selectionModel.get();
1038 }
1039
1040 /**
1041 * The SelectionModel provides the API through which it is possible
1042 * to select single or multiple items within a TreeTableView, as well as inspect
1043 * which rows have been selected by the user. Note that it has a generic
1044 * type that must match the type of the TreeTableView itself.
1045 * @return the selection model property
1046 */
1047 public final ObjectProperty<TreeTableViewSelectionModel<S>> selectionModelProperty() {
1048 if (selectionModel == null) {
1049 selectionModel = new SimpleObjectProperty<TreeTableViewSelectionModel<S>>(this, "selectionModel") {
1050
1051 TreeTableViewSelectionModel<S> oldValue = null;
1052
1053 @Override protected void invalidated() {
1054 // need to listen to the cellSelectionEnabledProperty
1055 // in order to set pseudo-class state
1056 if (oldValue != null) {
1057 oldValue.cellSelectionEnabledProperty().removeListener(weakCellSelectionModelInvalidationListener);
1058
1059 if (oldValue instanceof TreeTableViewArrayListSelectionModel) {
1060 ((TreeTableViewArrayListSelectionModel)oldValue).dispose();
1061 }
1062 }
1063
1064 oldValue = get();
1065
1066 if (oldValue != null) {
1067 oldValue.cellSelectionEnabledProperty().addListener(weakCellSelectionModelInvalidationListener);
1068 // fake invalidation to ensure updated pseudo-class states
1069 weakCellSelectionModelInvalidationListener.invalidated(oldValue.cellSelectionEnabledProperty());
1070 }
1071 }
1072 };
1073 }
1074 return selectionModel;
1075 }
1076
1077
1078 // --- Focus Model
1079 private ObjectProperty<TreeTableViewFocusModel<S>> focusModel;
1080
1081 /**
1082 * Sets the {@link FocusModel} to be used in the TreeTableView.
1083 * @param value the {@link FocusModel} to be used
1084 */
1085 public final void setFocusModel(TreeTableViewFocusModel<S> value) {
1086 focusModelProperty().set(value);
1087 }
1088
1089 /**
1090 * Returns the currently installed {@link FocusModel}.
1091 * @return the currently installed {@link FocusModel}
1092 */
1093 public final TreeTableViewFocusModel<S> getFocusModel() {
1094 return focusModel == null ? null : focusModel.get();
1095 }
1096
1097 /**
1098 * The FocusModel provides the API through which it is possible
1099 * to control focus on zero or one rows of the TreeTableView. Generally the
1100 * default implementation should be more than sufficient.
1101 * @return the focus model property
1102 */
1103 public final ObjectProperty<TreeTableViewFocusModel<S>> focusModelProperty() {
1104 if (focusModel == null) {
1105 focusModel = new SimpleObjectProperty<TreeTableViewFocusModel<S>>(this, "focusModel");
1106 }
1107 return focusModel;
1108 }
1109
1110
1111 // --- Tree node count
1112 /**
1113 * <p>Represents the number of tree nodes presently able to be visible in the
1114 * TreeTableView. This is essentially the count of all expanded tree items, and
1115 * their children.
1116 *
1117 * <p>For example, if just the root node is visible, the expandedItemCount will
1118 * be one. If the root had three children and the root was expanded, the value
1119 * will be four.
1120 */
1121 private ReadOnlyIntegerWrapper expandedItemCount = new ReadOnlyIntegerWrapper(this, "expandedItemCount", 0);
1122 public final ReadOnlyIntegerProperty expandedItemCountProperty() {
1123 return expandedItemCount.getReadOnlyProperty();
1124 }
1125 private void setExpandedItemCount(int value) {
1126 expandedItemCount.set(value);
1127 }
1128 public final int getExpandedItemCount() {
1129 if (expandedItemCountDirty) {
1130 updateExpandedItemCount(getRoot());
1131 }
1132 return expandedItemCount.get();
1133 }
1134
1135
1136 // --- Editable
1137 private BooleanProperty editable;
1138 public final void setEditable(boolean value) {
1139 editableProperty().set(value);
1140 }
1141 public final boolean isEditable() {
1142 return editable == null ? false : editable.get();
1143 }
1144 /**
1145 * Specifies whether this TreeTableView is editable - only if the TreeTableView and
1146 * the TreeCells within it are both editable will a TreeCell be able to go
1147 * into their editing state.
1148 * @return the editable property
1149 */
1150 public final BooleanProperty editableProperty() {
1151 if (editable == null) {
1152 editable = new SimpleBooleanProperty(this, "editable", false);
1153 }
1154 return editable;
1155 }
1156
1157
1158 // --- Editing Cell
1159 private ReadOnlyObjectWrapper<TreeTablePosition<S,?>> editingCell;
1160 private void setEditingCell(TreeTablePosition<S,?> value) {
1161 editingCellPropertyImpl().set(value);
1162 }
1163 public final TreeTablePosition<S,?> getEditingCell() {
1164 return editingCell == null ? null : editingCell.get();
1165 }
1166
1167 /**
1168 * Represents the current cell being edited, or null if
1169 * there is no cell being edited.
1170 * @return the editing cell property
1171 */
1172 public final ReadOnlyObjectProperty<TreeTablePosition<S,?>> editingCellProperty() {
1173 return editingCellPropertyImpl().getReadOnlyProperty();
1174 }
1175
1176 private ReadOnlyObjectWrapper<TreeTablePosition<S,?>> editingCellPropertyImpl() {
1177 if (editingCell == null) {
1178 editingCell = new ReadOnlyObjectWrapper<TreeTablePosition<S,?>>(this, "editingCell");
1179 }
1180 return editingCell;
1181 }
1182
1183
1184 // --- Table menu button visible
1185 private BooleanProperty tableMenuButtonVisible;
1186 /**
1187 * This controls whether a menu button is available when the user clicks
1188 * in a designated space within the TableView, within which is a radio menu
1189 * item for each TreeTableColumn in this table. This menu allows for the user to
1190 * show and hide all TreeTableColumns easily.
1191 * @return the table menu button visible property
1192 */
1193 public final BooleanProperty tableMenuButtonVisibleProperty() {
1194 if (tableMenuButtonVisible == null) {
1195 tableMenuButtonVisible = new SimpleBooleanProperty(this, "tableMenuButtonVisible");
1196 }
1197 return tableMenuButtonVisible;
1198 }
1199 public final void setTableMenuButtonVisible (boolean value) {
1200 tableMenuButtonVisibleProperty().set(value);
1201 }
1202 public final boolean isTableMenuButtonVisible() {
1203 return tableMenuButtonVisible == null ? false : tableMenuButtonVisible.get();
1204 }
1205
1206
1207 // --- Column Resize Policy
1208 private ObjectProperty<Callback<TreeTableView.ResizeFeatures, Boolean>> columnResizePolicy;
1209 public final void setColumnResizePolicy(Callback<TreeTableView.ResizeFeatures, Boolean> callback) {
1210 columnResizePolicyProperty().set(callback);
1211 }
1212 public final Callback<TreeTableView.ResizeFeatures, Boolean> getColumnResizePolicy() {
1213 return columnResizePolicy == null ? UNCONSTRAINED_RESIZE_POLICY : columnResizePolicy.get();
1214 }
1215
1216 /**
1217 * This is the function called when the user completes a column-resize
1218 * operation. The two most common policies are available as static functions
1219 * in the TableView class: {@link #UNCONSTRAINED_RESIZE_POLICY} and
1220 * {@link #CONSTRAINED_RESIZE_POLICY}.
1221 * @return the column resize policy property
1222 */
1223 public final ObjectProperty<Callback<TreeTableView.ResizeFeatures, Boolean>> columnResizePolicyProperty() {
1224 if (columnResizePolicy == null) {
1225 columnResizePolicy = new SimpleObjectProperty<Callback<TreeTableView.ResizeFeatures, Boolean>>(this, "columnResizePolicy", UNCONSTRAINED_RESIZE_POLICY) {
1226 private Callback<TreeTableView.ResizeFeatures, Boolean> oldPolicy;
1227
1228 @Override protected void invalidated() {
1229 if (isInited) {
1230 get().call(new TreeTableView.ResizeFeatures(TreeTableView.this, null, 0.0));
1231
1232 if (oldPolicy != null) {
1233 PseudoClass state = PseudoClass.getPseudoClass(oldPolicy.toString());
1234 pseudoClassStateChanged(state, false);
1235 }
1236 if (get() != null) {
1237 PseudoClass state = PseudoClass.getPseudoClass(get().toString());
1238 pseudoClassStateChanged(state, true);
1239 }
1240 oldPolicy = get();
1241 }
1242 }
1243 };
1244 }
1245 return columnResizePolicy;
1246 }
1247
1248
1249 // --- Row Factory
1250 private ObjectProperty<Callback<TreeTableView<S>, TreeTableRow<S>>> rowFactory;
1251
1252 /**
1253 * A function which produces a TreeTableRow. The system is responsible for
1254 * reusing TreeTableRows. Return from this function a TreeTableRow which
1255 * might be usable for representing a single row in a TableView.
1256 * <p>
1257 * Note that a TreeTableRow is <b>not</b> a TableCell. A TreeTableRow is
1258 * simply a container for a TableCell, and in most circumstances it is more
1259 * likely that you'll want to create custom TableCells, rather than
1260 * TreeTableRows. The primary use case for creating custom TreeTableRow
1261 * instances would most probably be to introduce some form of column
1262 * spanning support.
1263 * <p>
1264 * You can create custom TableCell instances per column by assigning the
1265 * appropriate function to the cellFactory property in the TreeTableColumn class.
1266 * @return the row factory property
1267 */
1268 public final ObjectProperty<Callback<TreeTableView<S>, TreeTableRow<S>>> rowFactoryProperty() {
1269 if (rowFactory == null) {
1270 rowFactory = new SimpleObjectProperty<Callback<TreeTableView<S>, TreeTableRow<S>>>(this, "rowFactory");
1271 }
1272 return rowFactory;
1273 }
1274 public final void setRowFactory(Callback<TreeTableView<S>, TreeTableRow<S>> value) {
1275 rowFactoryProperty().set(value);
1276 }
1277 public final Callback<TreeTableView<S>, TreeTableRow<S>> getRowFactory() {
1278 return rowFactory == null ? null : rowFactory.get();
1279 }
1280
1281
1282 // --- Placeholder Node
1283 private ObjectProperty<Node> placeholder;
1284 /**
1285 * This Node is shown to the user when the table has no content to show.
1286 * This may be the case because the table model has no data in the first
1287 * place, that a filter has been applied to the table model, resulting
1288 * in there being nothing to show the user, or that there are no currently
1289 * visible columns.
1290 * @return the placeholder property
1291 */
1292 public final ObjectProperty<Node> placeholderProperty() {
1293 if (placeholder == null) {
1294 placeholder = new SimpleObjectProperty<Node>(this, "placeholder");
1295 }
1296 return placeholder;
1297 }
1298 public final void setPlaceholder(Node value) {
1299 placeholderProperty().set(value);
1300 }
1301 public final Node getPlaceholder() {
1302 return placeholder == null ? null : placeholder.get();
1303 }
1304
1305
1306 // --- Fixed cell size
1307 private DoubleProperty fixedCellSize;
1308
1309 /**
1310 * Sets the new fixed cell size for this control. Any value greater than
1311 * zero will enable fixed cell size mode, whereas a zero or negative value
1312 * (or Region.USE_COMPUTED_SIZE) will be used to disabled fixed cell size
1313 * mode.
1314 *
1315 * @param value The new fixed cell size value, or a value less than or equal
1316 * to zero (or Region.USE_COMPUTED_SIZE) to disable.
1317 * @since JavaFX 8.0
1318 */
1319 public final void setFixedCellSize(double value) {
1320 fixedCellSizeProperty().set(value);
1321 }
1322
1323 /**
1324 * Returns the fixed cell size value. A value less than or equal to zero is
1325 * used to represent that fixed cell size mode is disabled, and a value
1326 * greater than zero represents the size of all cells in this control.
1327 *
1328 * @return A double representing the fixed cell size of this control, or a
1329 * value less than or equal to zero if fixed cell size mode is disabled.
1330 * @since JavaFX 8.0
1331 */
1332 public final double getFixedCellSize() {
1333 return fixedCellSize == null ? Region.USE_COMPUTED_SIZE : fixedCellSize.get();
1334 }
1335 /**
1336 * Specifies whether this control has cells that are a fixed height (of the
1337 * specified value). If this value is less than or equal to zero,
1338 * then all cells are individually sized and positioned. This is a slow
1339 * operation. Therefore, when performance matters and developers are not
1340 * dependent on variable cell sizes it is a good idea to set the fixed cell
1341 * size value. Generally cells are around 24px, so setting a fixed cell size
1342 * of 24 is likely to result in very little difference in visuals, but a
1343 * improvement to performance.
1344 *
1345 * <p>To set this property via CSS, use the -fx-fixed-cell-size property.
1346 * This should not be confused with the -fx-cell-size property. The difference
1347 * between these two CSS properties is that -fx-cell-size will size all
1348 * cells to the specified size, but it will not enforce that this is the
1349 * only size (thus allowing for variable cell sizes, and preventing the
1350 * performance gains from being possible). Therefore, when performance matters
1351 * use -fx-fixed-cell-size, instead of -fx-cell-size. If both properties are
1352 * specified in CSS, -fx-fixed-cell-size takes precedence.</p>
1353 *
1354 * @return the fixed cell size property
1355 * @since JavaFX 8.0
1356 */
1357 public final DoubleProperty fixedCellSizeProperty() {
1358 if (fixedCellSize == null) {
1359 fixedCellSize = new StyleableDoubleProperty(Region.USE_COMPUTED_SIZE) {
1360 @Override public CssMetaData<TreeTableView<?>,Number> getCssMetaData() {
1361 return StyleableProperties.FIXED_CELL_SIZE;
1362 }
1363
1364 @Override public Object getBean() {
1365 return TreeTableView.this;
1366 }
1367
1368 @Override public String getName() {
1369 return "fixedCellSize";
1370 }
1371 };
1372 }
1373 return fixedCellSize;
1374 }
1375
1376
1377 // --- SortMode
1378 /**
1379 * Specifies the sort mode to use when sorting the contents of this TreeTableView,
1380 * should any columns be specified in the {@link #getSortOrder() sort order}
1381 * list.
1382 */
1383 private ObjectProperty<TreeSortMode> sortMode;
1384 public final ObjectProperty<TreeSortMode> sortModeProperty() {
1385 if (sortMode == null) {
1386 sortMode = new SimpleObjectProperty<>(this, "sortMode", TreeSortMode.ALL_DESCENDANTS);
1387 }
1388 return sortMode;
1389 }
1390 public final void setSortMode(TreeSortMode value) {
1391 sortModeProperty().set(value);
1392 }
1393 public final TreeSortMode getSortMode() {
1394 return sortMode == null ? TreeSortMode.ALL_DESCENDANTS : sortMode.get();
1395 }
1396
1397
1398 // --- Comparator (built via sortOrder list, so read-only)
1399 /**
1400 * The comparator property is a read-only property that is representative of the
1401 * current state of the {@link #getSortOrder() sort order} list. The sort
1402 * order list contains the columns that have been added to it either programmatically
1403 * or via a user clicking on the headers themselves.
1404 */
1405 private ReadOnlyObjectWrapper<Comparator<TreeItem<S>>> comparator;
1406 private void setComparator(Comparator<TreeItem<S>> value) {
1407 comparatorPropertyImpl().set(value);
1408 }
1409 public final Comparator<TreeItem<S>> getComparator() {
1410 return comparator == null ? null : comparator.get();
1411 }
1412 public final ReadOnlyObjectProperty<Comparator<TreeItem<S>>> comparatorProperty() {
1413 return comparatorPropertyImpl().getReadOnlyProperty();
1414 }
1415 private ReadOnlyObjectWrapper<Comparator<TreeItem<S>>> comparatorPropertyImpl() {
1416 if (comparator == null) {
1417 comparator = new ReadOnlyObjectWrapper<>(this, "comparator");
1418 }
1419 return comparator;
1420 }
1421
1422
1423 // --- sortPolicy
1424 /**
1425 * The sort policy specifies how sorting in this TreeTableView should be performed.
1426 * For example, a basic sort policy may just recursively sort the children of
1427 * the root tree item, whereas a more advanced sort policy may call to a
1428 * database to perform the necessary sorting on the server-side.
1429 *
1430 * <p>TreeTableView ships with a {@link TableView#DEFAULT_SORT_POLICY default
1431 * sort policy} that does precisely as mentioned above: it simply attempts
1432 * to sort the tree hierarchy in-place.
1433 *
1434 * <p>It is recommended that rather than override the {@link TreeTableView#sort() sort}
1435 * method that a different sort policy be provided instead.
1436 */
1437 private ObjectProperty<Callback<TreeTableView<S>, Boolean>> sortPolicy;
1438 public final void setSortPolicy(Callback<TreeTableView<S>, Boolean> callback) {
1439 sortPolicyProperty().set(callback);
1440 }
1441 @SuppressWarnings("unchecked")
1442 public final Callback<TreeTableView<S>, Boolean> getSortPolicy() {
1443 return sortPolicy == null ?
1444 (Callback<TreeTableView<S>, Boolean>)(Object) DEFAULT_SORT_POLICY :
1445 sortPolicy.get();
1446 }
1447 @SuppressWarnings("unchecked")
1448 public final ObjectProperty<Callback<TreeTableView<S>, Boolean>> sortPolicyProperty() {
1449 if (sortPolicy == null) {
1450 sortPolicy = new SimpleObjectProperty<Callback<TreeTableView<S>, Boolean>>(
1451 this, "sortPolicy", (Callback<TreeTableView<S>, Boolean>)(Object) DEFAULT_SORT_POLICY) {
1452 @Override protected void invalidated() {
1453 sort();
1454 }
1455 };
1456 }
1457 return sortPolicy;
1458 }
1459
1460
1461 // onSort
1462 /**
1463 * Called when there's a request to sort the control.
1464 */
1465 private ObjectProperty<EventHandler<SortEvent<TreeTableView<S>>>> onSort;
1466
1467 public void setOnSort(EventHandler<SortEvent<TreeTableView<S>>> value) {
1468 onSortProperty().set(value);
1469 }
1470
1471 public EventHandler<SortEvent<TreeTableView<S>>> getOnSort() {
1472 if( onSort != null ) {
1473 return onSort.get();
1474 }
1475 return null;
1476 }
1477
1478 public ObjectProperty<EventHandler<SortEvent<TreeTableView<S>>>> onSortProperty() {
1479 if( onSort == null ) {
1480 onSort = new ObjectPropertyBase<EventHandler<SortEvent<TreeTableView<S>>>>() {
1481 @Override protected void invalidated() {
1482 EventType<SortEvent<TreeTableView<S>>> eventType = SortEvent.sortEvent();
1483 EventHandler<SortEvent<TreeTableView<S>>> eventHandler = get();
1484 setEventHandler(eventType, eventHandler);
1485 }
1486
1487 @Override public Object getBean() {
1488 return TreeTableView.this;
1489 }
1490
1491 @Override public String getName() {
1492 return "onSort";
1493 }
1494 };
1495 }
1496 return onSort;
1497 }
1498
1499
1500
1501 /***************************************************************************
1502 * *
1503 * Public API *
1504 * *
1505 **************************************************************************/
1506
1507 /** {@inheritDoc} */
1508 @Override protected void layoutChildren() {
1509 if (expandedItemCountDirty) {
1510 updateExpandedItemCount(getRoot());
1511 }
1512
1513 super.layoutChildren();
1514 }
1515
1516 /**
1517 * Scrolls the TreeTableView such that the item in the given index is visible to
1518 * the end user.
1519 *
1520 * @param index The index that should be made visible to the user, assuming
1521 * of course that it is greater than, or equal to 0, and less than the
1522 * number of the visible items in the TreeTableView.
1523 */
1524 public void scrollTo(int index) {
1525 ControlUtils.scrollToIndex(this, index);
1526 }
1527
1528 /**
1529 * Called when there's a request to scroll an index into view using {@link #scrollTo(int)}
1530 */
1531 private ObjectProperty<EventHandler<ScrollToEvent<Integer>>> onScrollTo;
1532
1533 public void setOnScrollTo(EventHandler<ScrollToEvent<Integer>> value) {
1534 onScrollToProperty().set(value);
1535 }
1536
1537 public EventHandler<ScrollToEvent<Integer>> getOnScrollTo() {
1538 if( onScrollTo != null ) {
1539 return onScrollTo.get();
1540 }
1541 return null;
1542 }
1543
1544 public ObjectProperty<EventHandler<ScrollToEvent<Integer>>> onScrollToProperty() {
1545 if( onScrollTo == null ) {
1546 onScrollTo = new ObjectPropertyBase<EventHandler<ScrollToEvent<Integer>>>() {
1547 @Override protected void invalidated() {
1548 setEventHandler(ScrollToEvent.scrollToTopIndex(), get());
1549 }
1550
1551 @Override public Object getBean() {
1552 return TreeTableView.this;
1553 }
1554
1555 @Override public String getName() {
1556 return "onScrollTo";
1557 }
1558 };
1559 }
1560 return onScrollTo;
1561 }
1562
1563 /**
1564 * Scrolls the TreeTableView so that the given column is visible within the viewport.
1565 * @param column The column that should be visible to the user.
1566 */
1567 public void scrollToColumn(TreeTableColumn<S, ?> column) {
1568 ControlUtils.scrollToColumn(this, column);
1569 }
1570
1571 /**
1572 * Scrolls the TreeTableView so that the given index is visible within the viewport.
1573 * @param columnIndex The index of a column that should be visible to the user.
1574 */
1575 public void scrollToColumnIndex(int columnIndex) {
1576 if( getColumns() != null ) {
1577 ControlUtils.scrollToColumn(this, getColumns().get(columnIndex));
1578 }
1579 }
1580
1581 /**
1582 * Called when there's a request to scroll a column into view using {@link #scrollToColumn(TreeTableColumn)}
1583 * or {@link #scrollToColumnIndex(int)}
1584 */
1585 private ObjectProperty<EventHandler<ScrollToEvent<TreeTableColumn<S, ?>>>> onScrollToColumn;
1586
1587 public void setOnScrollToColumn(EventHandler<ScrollToEvent<TreeTableColumn<S, ?>>> value) {
1588 onScrollToColumnProperty().set(value);
1589 }
1590
1591 public EventHandler<ScrollToEvent<TreeTableColumn<S, ?>>> getOnScrollToColumn() {
1592 if( onScrollToColumn != null ) {
1593 return onScrollToColumn.get();
1594 }
1595 return null;
1596 }
1597
1598 public ObjectProperty<EventHandler<ScrollToEvent<TreeTableColumn<S, ?>>>> onScrollToColumnProperty() {
1599 if( onScrollToColumn == null ) {
1600 onScrollToColumn = new ObjectPropertyBase<EventHandler<ScrollToEvent<TreeTableColumn<S, ?>>>>() {
1601 @Override
1602 protected void invalidated() {
1603 EventType<ScrollToEvent<TreeTableColumn<S, ?>>> type = ScrollToEvent.scrollToColumn();
1604 setEventHandler(type, get());
1605 }
1606 @Override
1607 public Object getBean() {
1608 return TreeTableView.this;
1609 }
1610
1611 @Override
1612 public String getName() {
1613 return "onScrollToColumn";
1614 }
1615 };
1616 }
1617 return onScrollToColumn;
1618 }
1619
1620 /**
1621 * Returns the index position of the given TreeItem, assuming that it is
1622 * currently accessible through the tree hierarchy (most notably, that all
1623 * parent tree items are expanded). If a parent tree item is collapsed,
1624 * the result is that this method will return -1 to indicate that the
1625 * given tree item is not accessible in the tree.
1626 *
1627 * @param item The TreeItem for which the index is sought.
1628 * @return An integer representing the location in the current TreeTableView of the
1629 * first instance of the given TreeItem, or -1 if it is null or can not
1630 * be found (for example, if a parent (all the way up to the root) is
1631 * collapsed).
1632 */
1633 public int getRow(TreeItem<S> item) {
1634 return TreeUtil.getRow(item, getRoot(), expandedItemCountDirty, isShowRoot());
1635 }
1636
1637 /**
1638 * Returns the TreeItem in the given index, or null if it is out of bounds.
1639 *
1640 * @param row The index of the TreeItem being sought.
1641 * @return The TreeItem in the given index, or null if it is out of bounds.
1642 */
1643 public TreeItem<S> getTreeItem(int row) {
1644 if (row < 0) return null;
1645
1646 // normalize the requested row based on whether showRoot is set
1647 final int _row = isShowRoot() ? row : (row + 1);
1648
1649 if (expandedItemCountDirty) {
1650 updateExpandedItemCount(getRoot());
1651 } else {
1652 if (treeItemCacheMap.containsKey(_row)) {
1653 SoftReference<TreeItem<S>> treeItemRef = treeItemCacheMap.get(_row);
1654 TreeItem<S> treeItem = treeItemRef.get();
1655 if (treeItem != null) {
1656 return treeItem;
1657 }
1658 }
1659 }
1660
1661 TreeItem<S> treeItem = TreeUtil.getItem(getRoot(), _row, expandedItemCountDirty);
1662 treeItemCacheMap.put(_row, new SoftReference<>(treeItem));
1663 return treeItem;
1664 }
1665
1666 /**
1667 * Returns the number of levels of 'indentation' of the given TreeItem,
1668 * based on how many times getParent() can be recursively called. If the
1669 * given TreeItem is the root node of this TreeTableView, or if the TreeItem
1670 * does not have any parent set, the returned value will be zero. For each
1671 * time getParent() is recursively called, the returned value is incremented
1672 * by one.
1673 *
1674 * @param node The TreeItem for which the level is needed.
1675 * @return An integer representing the number of parents above the given node,
1676 * or -1 if the given TreeItem is null.
1677 */
1678 public int getTreeItemLevel(TreeItem<?> node) {
1679 final TreeItem<?> root = getRoot();
1680
1681 if (node == null) return -1;
1682 if (node == root) return 0;
1683
1684 int level = 0;
1685 TreeItem<?> parent = node.getParent();
1686 while (parent != null) {
1687 level++;
1688
1689 if (parent == root) {
1690 break;
1691 }
1692
1693 parent = parent.getParent();
1694 }
1695
1696 return level;
1697 }
1698
1699 /**
1700 * The TreeTableColumns that are part of this TableView. As the user reorders
1701 * the TableView columns, this list will be updated to reflect the current
1702 * visual ordering.
1703 *
1704 * <p>Note: to display any data in a TableView, there must be at least one
1705 * TreeTableColumn in this ObservableList.</p>
1706 * @return the table table column
1707 */
1708 public final ObservableList<TreeTableColumn<S,?>> getColumns() {
1709 return columns;
1710 }
1711
1712 /**
1713 * The sortOrder list defines the order in which {@link TreeTableColumn} instances
1714 * are sorted. An empty sortOrder list means that no sorting is being applied
1715 * on the TableView. If the sortOrder list has one TreeTableColumn within it,
1716 * the TableView will be sorted using the
1717 * {@link TreeTableColumn#sortTypeProperty() sortType} and
1718 * {@link TreeTableColumn#comparatorProperty() comparator} properties of this
1719 * TreeTableColumn (assuming
1720 * {@link TreeTableColumn#sortableProperty() TreeTableColumn.sortable} is true).
1721 * If the sortOrder list contains multiple TreeTableColumn instances, then
1722 * the TableView is firstly sorted based on the properties of the first
1723 * TreeTableColumn. If two elements are considered equal, then the second
1724 * TreeTableColumn in the list is used to determine ordering. This repeats until
1725 * the results from all TreeTableColumn comparators are considered, if necessary.
1726 *
1727 * @return An ObservableList containing zero or more TreeTableColumn instances.
1728 */
1729 public final ObservableList<TreeTableColumn<S,?>> getSortOrder() {
1730 return sortOrder;
1731 }
1732
1733 /**
1734 * Applies the currently installed resize policy against the given column,
1735 * resizing it based on the delta value provided.
1736 * @param column the column
1737 * @param delta the delta
1738 * @return true if column resizing is applied
1739 */
1740 public boolean resizeColumn(TreeTableColumn<S,?> column, double delta) {
1741 if (column == null || Double.compare(delta, 0.0) == 0) return false;
1742
1743 boolean allowed = getColumnResizePolicy().call(new TreeTableView.ResizeFeatures<S>(TreeTableView.this, column, delta));
1744 if (!allowed) return false;
1745 return true;
1746 }
1747
1748 /**
1749 * Causes the cell at the given row/column view indexes to switch into
1750 * its editing state, if it is not already in it, and assuming that the
1751 * TableView and column are also editable.
1752 * @param row the row
1753 * @param column the column
1754 */
1755 public void edit(int row, TreeTableColumn<S,?> column) {
1756 if (!isEditable() || (column != null && ! column.isEditable())) {
1757 return;
1758 }
1759
1760 if (row < 0 && column == null) {
1761 setEditingCell(null);
1762 } else {
1763 setEditingCell(new TreeTablePosition<>(this, row, column));
1764 }
1765 }
1766
1767 /**
1768 * Returns an unmodifiable list containing the currently visible leaf columns.
1769 * @return an unmodifiable list containing the currently visible leaf columns
1770 */
1771 public ObservableList<TreeTableColumn<S,?>> getVisibleLeafColumns() {
1772 return unmodifiableVisibleLeafColumns;
1773 }
1774
1775 /**
1776 * Returns the position of the given column, relative to all other
1777 * visible leaf columns.
1778 * @param column the column
1779 * @return the position of the given column, relative to all other
1780 * visible leaf columns
1781 */
1782 public int getVisibleLeafIndex(TreeTableColumn<S,?> column) {
1783 return getVisibleLeafColumns().indexOf(column);
1784 }
1785
1786 /**
1787 * Returns the TreeTableColumn in the given column index, relative to all other
1788 * visible leaf columns.
1789 * @param column the column
1790 * @return the TreeTableColumn in the given column index, relative to all other
1791 * visible leaf columns
1792 */
1793 public TreeTableColumn<S,?> getVisibleLeafColumn(int column) {
1794 if (column < 0 || column >= visibleLeafColumns.size()) return null;
1795 return visibleLeafColumns.get(column);
1796 }
1797
1798 /**
1799 * The sort method forces the TreeTableView to re-run its sorting algorithm. More
1800 * often than not it is not necessary to call this method directly, as it is
1801 * automatically called when the {@link #getSortOrder() sort order},
1802 * {@link #sortPolicyProperty() sort policy}, or the state of the
1803 * TreeTableColumn {@link TreeTableColumn#sortTypeProperty() sort type} properties
1804 * change. In other words, this method should only be called directly when
1805 * something external changes and a sort is required.
1806 */
1807 public void sort() {
1808 final ObservableList<TreeTableColumn<S,?>> sortOrder = getSortOrder();
1809
1810 // update the Comparator property
1811 final Comparator<TreeItem<S>> oldComparator = getComparator();
1812 setComparator(sortOrder.isEmpty() ? null : new TableColumnComparatorBase.TreeTableColumnComparator(sortOrder));
1813
1814 // fire the onSort event and check if it is consumed, if
1815 // so, don't run the sort
1816 SortEvent<TreeTableView<S>> sortEvent = new SortEvent<>(TreeTableView.this, TreeTableView.this);
1817 fireEvent(sortEvent);
1818 if (sortEvent.isConsumed()) {
1819 // if the sort is consumed we could back out the last action (the code
1820 // is commented out right below), but we don't as we take it as a
1821 // sign that the developer has decided to handle the event themselves.
1822
1823 // sortLock = true;
1824 // TableUtil.handleSortFailure(sortOrder, lastSortEventType, lastSortEventSupportInfo);
1825 // sortLock = false;
1826 return;
1827 }
1828
1829 final List<TreeTablePosition<S,?>> prevState = new ArrayList<>(getSelectionModel().getSelectedCells());
1830 final int itemCount = prevState.size();
1831
1832 // we set makeAtomic to true here, so that we don't fire intermediate
1833 // sort events - instead we send a single permutation event at the end
1834 // of this method.
1835 getSelectionModel().startAtomic();
1836
1837 // get the sort policy and run it
1838 Callback<TreeTableView<S>, Boolean> sortPolicy = getSortPolicy();
1839 if (sortPolicy == null) return;
1840 Boolean success = sortPolicy.call(this);
1841
1842 getSelectionModel().stopAtomic();
1843
1844 if (success == null || ! success) {
1845 // the sort was a failure. Need to backout if possible
1846 sortLock = true;
1847 TableUtil.handleSortFailure(sortOrder, lastSortEventType, lastSortEventSupportInfo);
1848 setComparator(oldComparator);
1849 sortLock = false;
1850 } else {
1851 // sorting was a success, now we possibly fire an event on the
1852 // selection model that the items list has 'permutated' to a new ordering
1853
1854 // FIXME we should support alternative selection model implementations!
1855 if (getSelectionModel() instanceof TreeTableViewArrayListSelectionModel) {
1856 final TreeTableViewArrayListSelectionModel<S> sm = (TreeTableViewArrayListSelectionModel<S>) getSelectionModel();
1857 final ObservableList<TreeTablePosition<S, ?>> newState = sm.getSelectedCells();
1858
1859 List<TreeTablePosition<S, ?>> removed = new ArrayList<>();
1860 for (int i = 0; i < itemCount; i++) {
1861 TreeTablePosition<S, ?> prevItem = prevState.get(i);
1862 if (!newState.contains(prevItem)) {
1863 removed.add(prevItem);
1864 }
1865 }
1866
1867 if (!removed.isEmpty()) {
1868 // the sort operation effectively permutates the selectedCells list,
1869 // but we cannot fire a permutation event as we are talking about
1870 // TreeTablePosition's changing (which may reside in the same list
1871 // position before and after the sort). Therefore, we need to fire
1872 // a single add/remove event to cover the added and removed positions.
1873 ListChangeListener.Change<TreeTablePosition<S, ?>> c = new NonIterableChange.GenericAddRemoveChange<>(0, itemCount, removed, newState);
1874 sm.fireCustomSelectedCellsListChangeEvent(c);
1875 }
1876 }
1877 }
1878 }
1879
1880 /**
1881 * Calling {@code refresh()} forces the TreeTableView control to recreate and
1882 * repopulate the cells necessary to populate the visual bounds of the control.
1883 * In other words, this forces the TreeTableView to update what it is showing to
1884 * the user. This is useful in cases where the underlying data source has
1885 * changed in a way that is not observed by the TreeTableView itself.
1886 *
1887 * @since JavaFX 8u60
1888 */
1889 public void refresh() {
1890 getProperties().put(Properties.RECREATE, Boolean.TRUE);
1891 }
1892
1893
1894
1895 /***************************************************************************
1896 * *
1897 * Private Implementation *
1898 * *
1899 **************************************************************************/
1900
1901 private boolean sortLock = false;
1902 private TableUtil.SortEventType lastSortEventType = null;
1903 private Object[] lastSortEventSupportInfo = null;
1904
1905 private void doSort(final TableUtil.SortEventType sortEventType, final Object... supportInfo) {
1906 if (sortLock) {
1907 return;
1908 }
1909
1910 this.lastSortEventType = sortEventType;
1911 this.lastSortEventSupportInfo = supportInfo;
1912 sort();
1913 this.lastSortEventType = null;
1914 this.lastSortEventSupportInfo = null;
1915 }
1916
1917 private void updateExpandedItemCount(TreeItem<S> treeItem) {
1918 setExpandedItemCount(TreeUtil.updateExpandedItemCount(treeItem, expandedItemCountDirty, isShowRoot()));
1919
1920 if (expandedItemCountDirty) {
1921 // this is a very inefficient thing to do, but for now having a cache
1922 // is better than nothing at all...
1923 treeItemCacheMap.clear();
1924 }
1925
1926 expandedItemCountDirty = false;
1927 }
1928
1929 private void updateRootExpanded() {
1930 // if we aren't showing the root, and the root isn't expanded, we expand
1931 // it now so that something is shown.
1932 if (!isShowRoot() && getRoot() != null && ! getRoot().isExpanded()) {
1933 getRoot().setExpanded(true);
1934 }
1935 }
1936
1937
1938 // --- Content width
1939 private void setContentWidth(double contentWidth) {
1940 this.contentWidth = contentWidth;
1941 if (isInited) {
1942 // sometimes the current column resize policy will have to modify the
1943 // column width of all columns in the table if the table width changes,
1944 // so we short-circuit the resize function and just go straight there
1945 // with a null TreeTableColumn, which indicates to the resize policy function
1946 // that it shouldn't actually do anything specific to one column.
1947 getColumnResizePolicy().call(new TreeTableView.ResizeFeatures<S>(TreeTableView.this, null, 0.0));
1948 }
1949 }
1950
1951 /**
1952 * Recomputes the currently visible leaf columns in this TableView.
1953 */
1954 private void updateVisibleLeafColumns() {
1955 // update visible leaf columns list
1956 List<TreeTableColumn<S,?>> cols = new ArrayList<TreeTableColumn<S,?>>();
1957 buildVisibleLeafColumns(getColumns(), cols);
1958 visibleLeafColumns.setAll(cols);
1959
1960 // sometimes the current column resize policy will have to modify the
1961 // column width of all columns in the table if the table width changes,
1962 // so we short-circuit the resize function and just go straight there
1963 // with a null TreeTableColumn, which indicates to the resize policy function
1964 // that it shouldn't actually do anything specific to one column.
1965 getColumnResizePolicy().call(new TreeTableView.ResizeFeatures<S>(TreeTableView.this, null, 0.0));
1966 }
1967
1968 private void buildVisibleLeafColumns(List<TreeTableColumn<S,?>> cols, List<TreeTableColumn<S,?>> vlc) {
1969 for (TreeTableColumn<S,?> c : cols) {
1970 if (c == null) continue;
1971
1972 boolean hasChildren = ! c.getColumns().isEmpty();
1973
1974 if (hasChildren) {
1975 buildVisibleLeafColumns(c.getColumns(), vlc);
1976 } else if (c.isVisible()) {
1977 vlc.add(c);
1978 }
1979 }
1980 }
1981
1982
1983
1984 /***************************************************************************
1985 * *
1986 * Stylesheet Handling *
1987 * *
1988 **************************************************************************/
1989
1990 private static final String DEFAULT_STYLE_CLASS = "tree-table-view";
1991
1992 private static final PseudoClass PSEUDO_CLASS_CELL_SELECTION =
1993 PseudoClass.getPseudoClass("cell-selection");
1994 private static final PseudoClass PSEUDO_CLASS_ROW_SELECTION =
1995 PseudoClass.getPseudoClass("row-selection");
1996
1997 private static class StyleableProperties {
1998 private static final CssMetaData<TreeTableView<?>,Number> FIXED_CELL_SIZE =
1999 new CssMetaData<TreeTableView<?>,Number>("-fx-fixed-cell-size",
2000 SizeConverter.getInstance(),
2001 Region.USE_COMPUTED_SIZE) {
2002
2003 @Override public Double getInitialValue(TreeTableView<?> node) {
2004 return node.getFixedCellSize();
2005 }
2006
2007 @Override public boolean isSettable(TreeTableView<?> n) {
2008 return n.fixedCellSize == null || !n.fixedCellSize.isBound();
2009 }
2010
2011 @Override public StyleableProperty<Number> getStyleableProperty(TreeTableView<?> n) {
2012 return (StyleableProperty<Number>)(WritableValue<Number>) n.fixedCellSizeProperty();
2013 }
2014 };
2015
2016 private static final List<CssMetaData<? extends Styleable, ?>> STYLEABLES;
2017 static {
2018 final List<CssMetaData<? extends Styleable, ?>> styleables =
2019 new ArrayList<CssMetaData<? extends Styleable, ?>>(Control.getClassCssMetaData());
2020 styleables.add(FIXED_CELL_SIZE);
2021 STYLEABLES = Collections.unmodifiableList(styleables);
2022 }
2023 }
2024
2025 /**
2026 * @return The CssMetaData associated with this class, which may include the
2027 * CssMetaData of its superclasses.
2028 */
2029 public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
2030 return StyleableProperties.STYLEABLES;
2031 }
2032
2033 /**
2034 * {@inheritDoc}
2035 * @since JavaFX 8.0
2036 */
2037 @Override
2038 public List<CssMetaData<? extends Styleable, ?>> getControlCssMetaData() {
2039 return getClassCssMetaData();
2040 }
2041
2042 /** {@inheritDoc} */
2043 @Override protected Skin<?> createDefaultSkin() {
2044 return new TreeTableViewSkin<S>(this);
2045 }
2046
2047
2048
2049 /***************************************************************************
2050 * *
2051 * Accessibility handling *
2052 * *
2053 **************************************************************************/
2054
2055 @Override
2056 public Object queryAccessibleAttribute(AccessibleAttribute attribute, Object... parameters) {
2057 switch (attribute) {
2058 case ROW_COUNT: return getExpandedItemCount();
2059 case COLUMN_COUNT: return getVisibleLeafColumns().size();
2060
2061 /*
2062 * TreeTableViewSkin returns TreeTableRows back to TreeTableView.
2063 * TreeTableRowSkin returns TreeTableCells back to TreeTableRow.
2064 */
2065 case SELECTED_ITEMS: {
2066 @SuppressWarnings("unchecked")
2067 ObservableList<TreeTableRow<S>> rows = (ObservableList<TreeTableRow<S>>)super.queryAccessibleAttribute(attribute, parameters);
2068 List<Node> selection = new ArrayList<>();
2069 for (TreeTableRow<S> row : rows) {
2070 @SuppressWarnings("unchecked")
2071 ObservableList<Node> cells = (ObservableList<Node>)row.queryAccessibleAttribute(attribute, parameters);
2072 if (cells != null) selection.addAll(cells);
2073 }
2074 return FXCollections.observableArrayList(selection);
2075 }
2076 case FOCUS_ITEM: {
2077 Node row = (Node)super.queryAccessibleAttribute(attribute, parameters);
2078 if (row == null) return null;
2079 Node cell = (Node)row.queryAccessibleAttribute(attribute, parameters);
2080 /* cell equals to null means the row is a placeholder node */
2081 return cell != null ? cell : row;
2082 }
2083 case CELL_AT_ROW_COLUMN: {
2084 @SuppressWarnings("unchecked")
2085 TreeTableRow<S> row = (TreeTableRow<S>)super.queryAccessibleAttribute(attribute, parameters);
2086 return row != null ? row.queryAccessibleAttribute(attribute, parameters) : null;
2087 }
2088 case MULTIPLE_SELECTION: {
2089 TreeTableViewSelectionModel<S> sm = getSelectionModel();
2090 return sm != null && sm.getSelectionMode() == SelectionMode.MULTIPLE;
2091 }
2092 default: return super.queryAccessibleAttribute(attribute, parameters);
2093 }
2094 }
2095
2096 /***************************************************************************
2097 * *
2098 * Support Classes *
2099 * *
2100 **************************************************************************/
2101
2102 /**
2103 * An immutable wrapper class for use in the TableView
2104 * {@link TreeTableView#columnResizePolicyProperty() column resize} functionality.
2105 * @since JavaFX 8.0
2106 */
2107 public static class ResizeFeatures<S> extends ResizeFeaturesBase<TreeItem<S>> {
2108 private TreeTableView<S> treeTable;
2109
2110 /**
2111 * Creates an instance of this class, with the provided TreeTableView,
2112 * TreeTableColumn and delta values being set and stored in this immutable
2113 * instance.
2114 *
2115 * @param treeTable The TreeTableView upon which the resize operation is occurring.
2116 * @param column The column upon which the resize is occurring, or null
2117 * if this ResizeFeatures instance is being created as a result of a
2118 * TreeTableView resize operation.
2119 * @param delta The amount of horizontal space added or removed in the
2120 * resize operation.
2121 */
2122 public ResizeFeatures(TreeTableView<S> treeTable, TreeTableColumn<S,?> column, Double delta) {
2123 super(column, delta);
2124 this.treeTable = treeTable;
2125 }
2126
2127 /**
2128 * Returns the column upon which the resize is occurring, or null
2129 * if this ResizeFeatures instance was created as a result of a
2130 * TreeTableView resize operation.
2131 */
2132 @Override public TreeTableColumn<S,?> getColumn() {
2133 return (TreeTableColumn<S,?>) super.getColumn();
2134 }
2135
2136 /**
2137 * Returns the TreeTableView upon which the resize operation is occurring.
2138 * @return the TreeTableView upon which the resize operation is occurring
2139 */
2140 public TreeTableView<S> getTable() { return treeTable; }
2141 }
2142
2143
2144
2145 /**
2146 * An {@link Event} subclass used specifically in TreeTableView for representing
2147 * edit-related events. It provides additional API to easily access the
2148 * TreeItem that the edit event took place on, as well as the input provided
2149 * by the end user.
2150 *
2151 * @param <S> The type of the input, which is the same type as the TreeTableView
2152 * itself.
2153 * @since JavaFX 8.0
2154 */
2155 public static class EditEvent<S> extends Event {
2156 private static final long serialVersionUID = -4437033058917528976L;
2157
2158 /**
2159 * Common supertype for all edit event types.
2160 */
2161 public static final EventType<?> ANY = EDIT_ANY_EVENT;
2162
2163 private final TreeTableView<S> source;
2164 private final S oldValue;
2165 private final S newValue;
2166 private transient final TreeItem<S> treeItem;
2167
2168 /**
2169 * Creates a new EditEvent instance to represent an edit event. This
2170 * event is used for {@link #EDIT_START_EVENT},
2171 * {@link #EDIT_COMMIT_EVENT} and {@link #EDIT_CANCEL_EVENT} types.
2172 * @param source the source
2173 * @param eventType the eventType
2174 * @param treeItem the treeItem
2175 * @param oldValue the oldValue
2176 * @param newValue the newValue
2177 */
2178 public EditEvent(TreeTableView<S> source,
2179 EventType<? extends TreeTableView.EditEvent> eventType,
2180 TreeItem<S> treeItem, S oldValue, S newValue) {
2181 super(source, Event.NULL_SOURCE_TARGET, eventType);
2182 this.source = source;
2183 this.oldValue = oldValue;
2184 this.newValue = newValue;
2185 this.treeItem = treeItem;
2186 }
2187
2188 /**
2189 * Returns the TreeTableView upon which the edit took place.
2190 * @return the TreeTableView upon which the edit took place
2191 */
2192 @Override public TreeTableView<S> getSource() {
2193 return source;
2194 }
2195
2196 /**
2197 * Returns the {@link TreeItem} upon which the edit took place.
2198 * @return the {@link TreeItem} upon which the edit took place
2199 */
2200 public TreeItem<S> getTreeItem() {
2201 return treeItem;
2202 }
2203
2204 /**
2205 * Returns the new value input into the TreeItem by the end user.
2206 * @return the new value input into the TreeItem by the end user
2207 */
2208 public S getNewValue() {
2209 return newValue;
2210 }
2211
2212 /**
2213 * Returns the old value that existed in the TreeItem prior to the current
2214 * edit event.
2215 * @return the old value that existed in the TreeItem prior to the current
2216 * edit event
2217 */
2218 public S getOldValue() {
2219 return oldValue;
2220 }
2221 }
2222
2223
2224
2225 /**
2226 * A simple extension of the {@link SelectionModel} abstract class to
2227 * allow for special support for TreeTableView controls.
2228 *
2229 * @since JavaFX 8.0
2230 */
2231 public static abstract class TreeTableViewSelectionModel<S> extends
2232 TableSelectionModel<TreeItem<S>> {
2233
2234 /***********************************************************************
2235 * *
2236 * Private fields *
2237 * *
2238 **********************************************************************/
2239
2240 private final TreeTableView<S> treeTableView;
2241
2242
2243 /***********************************************************************
2244 * *
2245 * Constructors *
2246 * *
2247 **********************************************************************/
2248
2249 /**
2250 * Builds a default TreeTableViewSelectionModel instance with the provided
2251 * TreeTableView.
2252 * @param treeTableView The TreeTableView upon which this selection model should
2253 * operate.
2254 * @throws NullPointerException TreeTableView can not be null.
2255 */
2256 public TreeTableViewSelectionModel(final TreeTableView<S> treeTableView) {
2257 if (treeTableView == null) {
2258 throw new NullPointerException("TreeTableView can not be null");
2259 }
2260
2261 this.treeTableView = treeTableView;
2262 }
2263
2264
2265
2266 /***********************************************************************
2267 * *
2268 * Abstract API *
2269 * *
2270 **********************************************************************/
2271
2272 /**
2273 * A read-only ObservableList representing the currently selected cells
2274 * in this TreeTableView. Rather than directly modify this list, please
2275 * use the other methods provided in the TreeTableViewSelectionModel.
2276 * @return a list of selected cells
2277 */
2278 public abstract ObservableList<TreeTablePosition<S,?>> getSelectedCells();
2279
2280
2281
2282 /***********************************************************************
2283 * *
2284 * Public API *
2285 * *
2286 **********************************************************************/
2287
2288 /**
2289 * Returns the TreeTableView instance that this selection model is installed in.
2290 * @return the TreeTableView instance that this selection model is installed in
2291 */
2292 public TreeTableView<S> getTreeTableView() {
2293 return treeTableView;
2294 }
2295
2296 /** {@inheritDoc} */
2297 @Override public TreeItem<S> getModelItem(int index) {
2298 return treeTableView.getTreeItem(index);
2299 }
2300
2301 /** {@inheritDoc} */
2302 @Override protected int getItemCount() {
2303 return treeTableView.getExpandedItemCount();
2304 }
2305
2306 /** {@inheritDoc} */
2307 @Override public void focus(int row) {
2308 focus(row, null);
2309 }
2310
2311 /** {@inheritDoc} */
2312 @Override public int getFocusedIndex() {
2313 return getFocusedCell().getRow();
2314 }
2315
2316 /** {@inheritDoc} */
2317 @Override public void selectRange(int minRow, TableColumnBase<TreeItem<S>,?> minColumn,
2318 int maxRow, TableColumnBase<TreeItem<S>,?> maxColumn) {
2319 final int minColumnIndex = treeTableView.getVisibleLeafIndex((TreeTableColumn<S,?>)minColumn);
2320 final int maxColumnIndex = treeTableView.getVisibleLeafIndex((TreeTableColumn<S,?>)maxColumn);
2321 for (int _row = minRow; _row <= maxRow; _row++) {
2322 for (int _col = minColumnIndex; _col <= maxColumnIndex; _col++) {
2323 select(_row, treeTableView.getVisibleLeafColumn(_col));
2324 }
2325 }
2326 }
2327
2328
2329
2330 /***********************************************************************
2331 * *
2332 * Private implementation *
2333 * *
2334 **********************************************************************/
2335
2336 private void focus(int row, TreeTableColumn<S,?> column) {
2337 focus(new TreeTablePosition<>(getTreeTableView(), row, column));
2338 }
2339
2340 private void focus(TreeTablePosition<S,?> pos) {
2341 if (getTreeTableView().getFocusModel() == null) return;
2342
2343 getTreeTableView().getFocusModel().focus(pos.getRow(), pos.getTableColumn());
2344 }
2345
2346 private TreeTablePosition<S,?> getFocusedCell() {
2347 if (treeTableView.getFocusModel() == null) {
2348 return new TreeTablePosition<>(treeTableView, -1, null);
2349 }
2350 return treeTableView.getFocusModel().getFocusedCell();
2351 }
2352 }
2353
2354
2355
2356 /**
2357 * A primitive selection model implementation, using a List<Integer> to store all
2358 * selected indices.
2359 */
2360 // package for testing
2361 static class TreeTableViewArrayListSelectionModel<S> extends TreeTableViewSelectionModel<S> {
2362
2363 private final MappingChange.Map<TreeTablePosition<S,?>,Integer> cellToIndicesMap = f -> f.getRow();
2364
2365 private TreeTableView<S> treeTableView = null;
2366
2367 /***********************************************************************
2368 * *
2369 * Constructors *
2370 * *
2371 **********************************************************************/
2372
2373 public TreeTableViewArrayListSelectionModel(final TreeTableView<S> treeTableView) {
2374 super(treeTableView);
2375 this.treeTableView = treeTableView;
2376
2377 this.treeTableView.rootProperty().addListener(weakRootPropertyListener);
2378 this.treeTableView.showRootProperty().addListener(showRootPropertyListener);
2379 updateTreeEventListener(null, treeTableView.getRoot());
2380
2381 selectedCellsMap = new SelectedCellsMap<TreeTablePosition<S,?>>(this::fireCustomSelectedCellsListChangeEvent) {
2382 @Override public boolean isCellSelectionEnabled() {
2383 return TreeTableViewArrayListSelectionModel.this.isCellSelectionEnabled();
2384 }
2385 };
2386
2387 selectedCellsSeq = new ReadOnlyUnbackedObservableList<TreeTablePosition<S,?>>() {
2388 @Override public TreeTablePosition<S,?> get(int i) {
2389 return selectedCellsMap.get(i);
2390 }
2391
2392 @Override public int size() {
2393 return selectedCellsMap.size();
2394 }
2395 };
2396 // selectedCellsSeq.addListener((ListChangeListener<? super TreeTablePosition<S,?>>) c -> {
2397 // ControlUtils.updateSelectedIndices(this, c);
2398 // });
2399
2400 updateDefaultSelection();
2401
2402 cellSelectionEnabledProperty().addListener(o -> {
2403 updateDefaultSelection();
2404 TableCellBehaviorBase.setAnchor(treeTableView, getFocusedCell(), true);
2405 });
2406 }
2407
2408 private void dispose() {
2409 this.treeTableView.rootProperty().removeListener(weakRootPropertyListener);
2410 this.treeTableView.showRootProperty().removeListener(showRootPropertyListener);
2411
2412 TreeItem<S> root = this.treeTableView.getRoot();
2413 if (root != null) {
2414 root.removeEventHandler(TreeItem.<S>expandedItemCountChangeEvent(), weakTreeItemListener);
2415 }
2416 }
2417
2418 private void updateTreeEventListener(TreeItem<S> oldRoot, TreeItem<S> newRoot) {
2419 if (oldRoot != null && weakTreeItemListener != null) {
2420 oldRoot.removeEventHandler(TreeItem.<S>expandedItemCountChangeEvent(), weakTreeItemListener);
2421 }
2422
2423 if (newRoot != null) {
2424 weakTreeItemListener = new WeakEventHandler<>(treeItemListener);
2425 newRoot.addEventHandler(TreeItem.<S>expandedItemCountChangeEvent(), weakTreeItemListener);
2426 }
2427 }
2428
2429 private ChangeListener<TreeItem<S>> rootPropertyListener = (observable, oldValue, newValue) -> {
2430 updateDefaultSelection();
2431
2432 updateTreeEventListener(oldValue, newValue);
2433 };
2434
2435 private InvalidationListener showRootPropertyListener = o -> {
2436 shiftSelection(0, treeTableView.isShowRoot() ? 1 : -1, null);
2437 };
2438
2439 private EventHandler<TreeItem.TreeModificationEvent<S>> treeItemListener = new EventHandler<>() {
2440 @Override public void handle(TreeItem.TreeModificationEvent<S> e) {
2441
2442 if (getSelectedIndex() == -1 && getSelectedItem() == null) return;
2443
2444 final TreeItem<S> treeItem = e.getTreeItem();
2445 if (treeItem == null) return;
2446
2447 final int oldSelectedIndex = getSelectedIndex();
2448
2449 treeTableView.expandedItemCountDirty = true;
2450
2451 // we only shift selection from this row - everything before it
2452 // is safe. We might change this below based on certain criteria
2453 int startRow = treeTableView.getRow(treeItem);
2454
2455 int shift = 0;
2456 ListChangeListener.Change<? extends TreeItem<?>> change = e.getChange();
2457 if (change != null) {
2458 change.next();
2459 }
2460
2461 do {
2462 final int addedSize = change == null ? 0 : change.getAddedSize();
2463 final int removedSize = change == null ? 0 : change.getRemovedSize();
2464
2465 if (e.wasExpanded()) {
2466 // need to shuffle selection by the number of visible children
2467 shift += treeItem.getExpandedDescendentCount(false) - 1;
2468 startRow++;
2469 } else if (e.wasCollapsed()) {
2470 // remove selection from any child treeItem, and also determine
2471 // if any child item was selected (in which case the parent
2472 // takes the selection on collapse)
2473 treeItem.getExpandedDescendentCount(false);
2474 final int count = treeItem.previousExpandedDescendentCount;
2475
2476 final int selectedIndex = getSelectedIndex();
2477 final boolean wasPrimarySelectionInChild =
2478 selectedIndex >= (startRow + 1) &&
2479 selectedIndex < (startRow + count);
2480
2481 boolean wasAnyChildSelected = false;
2482 final boolean isCellSelectionMode = isCellSelectionEnabled();
2483 ObservableList<TreeTableColumn<S, ?>> columns = getTreeTableView().getVisibleLeafColumns();
2484
2485 selectedIndices._beginChange();
2486 final int from = startRow + 1;
2487 final int to = startRow + count;
2488 final List<Integer> removed = new ArrayList<>();
2489 TreeTableColumn<S, ?> selectedColumn = null;
2490 for (int i = from; i < to; i++) {
2491 // we have to handle cell selection mode differently than
2492 // row selection mode. Refer to RT-34103 for the bug report
2493 // that drove this change, but in short the issue was that
2494 // when collapsing a branch that had selection, we were
2495 // always calling isSelected(row), but that always returns
2496 // false in cell selection mode.
2497 if (isCellSelectionMode) {
2498 for (int column = 0; column < columns.size(); column++) {
2499 final TreeTableColumn<S, ?> col = columns.get(column);
2500 if (isSelected(i, col)) {
2501 wasAnyChildSelected = true;
2502 clearSelection(i, col);
2503 selectedColumn = col;
2504 }
2505 }
2506 } else {
2507 if (isSelected(i)) {
2508 wasAnyChildSelected = true;
2509 removed.add(i);
2510 }
2511 }
2512 }
2513
2514 ControlUtils.reducingChange(selectedIndices, removed);
2515
2516 for (int index : removed) {
2517 startAtomic();
2518 // we pass in false here to prevent a lookup into the TreeItem, as it is unnecessary
2519 // and results in JDK-8152396
2520 clearSelection(new TreeTablePosition<>(treeTableView, index, null, false));
2521 stopAtomic();
2522 }
2523 selectedIndices._endChange();
2524
2525 // put selection onto the newly-collapsed tree item
2526 if (wasPrimarySelectionInChild && wasAnyChildSelected) {
2527 select(startRow, selectedColumn);
2528 }
2529
2530 shift += -count + 1;
2531 startRow++;
2532 } else if (e.wasPermutated()) {
2533 // General approach:
2534 // -- detected a sort has happened
2535 // -- Create a permutation lookup map (1)
2536 // -- dump all the selected indices into a list (2)
2537 // -- create a list containing the new indices (3)
2538 // -- for each previously-selected index (4)
2539 // -- if index is in the permutation lookup map
2540 // -- add the new index to the new indices list
2541 // -- Perform batch selection (5)
2542
2543 startAtomic();
2544
2545 final int offset = startRow + 1;
2546
2547 // (1)
2548 int length = e.getTo() - e.getFrom();
2549 HashMap<Integer, Integer> pMap = new HashMap<> (length);
2550 for (int i = e.getFrom(); i < e.getTo(); i++) {
2551 pMap.put(i, e.getChange().getPermutation(i));
2552 }
2553
2554 // (2)
2555 List<TreeTablePosition<S,?>> selectedIndices = new ArrayList<>(getSelectedCells());
2556
2557 // (3)
2558 List<TreeTablePosition<S,?>> newIndices = new ArrayList<>(selectedIndices.size());
2559
2560 // (4)
2561 boolean selectionIndicesChanged = false;
2562 for (int i = 0; i < selectedIndices.size(); i++) {
2563 final TreeTablePosition<S,?> oldIndex = selectedIndices.get(i);
2564 final int oldRow = oldIndex.getRow() - offset;
2565
2566 if (pMap.containsKey(oldRow)) {
2567 int newIndex = pMap.get(oldRow) + offset;
2568
2569 selectionIndicesChanged = selectionIndicesChanged || newIndex != oldRow;
2570
2571 newIndices.add(new TreeTablePosition<>(oldIndex.getTreeTableView(), newIndex, oldIndex.getTableColumn()));
2572 }
2573
2574 // check if the root element of this event was selected, so that we can retain it
2575 if (oldIndex.getRow() == startRow) {
2576 newIndices.add(new TreeTablePosition<>(oldIndex.getTreeTableView(), oldIndex.getRow(), oldIndex.getTableColumn()));
2577 }
2578 }
2579
2580 if (selectionIndicesChanged) {
2581 // (5)
2582 quietClearSelection();
2583 stopAtomic();
2584
2585 selectedCellsMap.setAll(newIndices);
2586
2587 final int offsetOldIndex = oldSelectedIndex - offset;
2588 if (offsetOldIndex >= 0 && offsetOldIndex < getItemCount()) {
2589 int newIndex = e.getChange().getPermutation(offsetOldIndex);
2590 setSelectedIndex(newIndex + offset);
2591 focus(newIndex + offset);
2592 }
2593 } else {
2594 stopAtomic();
2595 }
2596 } else if (e.wasAdded()) {
2597 // shuffle selection by the number of added items
2598 shift += treeItem.isExpanded() ? addedSize : 0;
2599
2600 // RT-32963: We were taking the startRow from the TreeItem
2601 // in which the children were added, rather than from the
2602 // actual position of the new child. This led to selection
2603 // being moved off the parent TreeItem by mistake.
2604 // The 'if (e.getAddedSize() == 1)' condition here was
2605 // subsequently commented out due to RT-33894.
2606 startRow = treeTableView.getRow(e.getChange().getAddedSubList().get(0));
2607
2608 TreeTablePosition<S, ?> anchor = TreeTableCellBehavior.getAnchor(treeTableView, null);
2609 if (anchor != null) {
2610 boolean isAnchorSelected = isSelected(anchor.getRow(), anchor.getTableColumn());
2611 if (isAnchorSelected) {
2612 TreeTablePosition<S, ?> newAnchor = new TreeTablePosition<>(treeTableView, anchor.getRow() + shift, anchor.getTableColumn());
2613 TreeTableCellBehavior.setAnchor(treeTableView, newAnchor, false);
2614 }
2615 }
2616 } else if (e.wasRemoved()) {
2617 // shuffle selection by the number of removed items
2618 shift += treeItem.isExpanded() ? -removedSize : 0;
2619
2620 // the start row is incorrect - it is _not_ the index of the
2621 // TreeItem in which the children were removed from (which is
2622 // what it currently represents). We need to take the 'from'
2623 // value out of the event and make use of that to understand
2624 // what actually changed inside the children list.
2625 startRow += e.getFrom() + 1;
2626
2627 // whilst we are here, we should check if the removed items
2628 // are part of the selectedItems list - and remove them
2629 // from selection if they are (as per RT-15446)
2630 final List<Integer> selectedIndices = getSelectedIndices();
2631 final List<TreeItem<S>> selectedItems = getSelectedItems();
2632 final TreeItem<S> selectedItem = getSelectedItem();
2633 final List<? extends TreeItem<S>> removedChildren = e.getChange().getRemoved();
2634
2635 for (int i = 0; i < selectedIndices.size() && !selectedItems.isEmpty(); i++) {
2636 int index = selectedIndices.get(i);
2637 if (index > selectedItems.size()) break;
2638
2639 if (removedChildren.size() == 1 &&
2640 selectedItems.size() == 1 &&
2641 selectedItem != null &&
2642 selectedItem.equals(removedChildren.get(0))) {
2643 // Bug fix for RT-28637
2644 if (oldSelectedIndex < getItemCount()) {
2645 final int previousRow = oldSelectedIndex == 0 ? 0 : oldSelectedIndex - 1;
2646 TreeItem<S> newSelectedItem = getModelItem(previousRow);
2647 if (!selectedItem.equals(newSelectedItem)) {
2648 clearAndSelect(previousRow);
2649 }
2650 }
2651 }
2652 }
2653 }
2654 } while (e.getChange() != null && e.getChange().next());
2655
2656 shiftSelection(startRow, shift, new Callback<ShiftParams, Void>() {
2657 @Override public Void call(ShiftParams param) {
2658
2659 // we make the shifts atomic, as otherwise listeners to
2660 // the items / indices lists get a lot of intermediate
2661 // noise. They eventually get the summary event fired
2662 // from within shiftSelection, so this is ok.
2663 startAtomic();
2664
2665 final int clearIndex = param.getClearIndex();
2666 final int setIndex = param.getSetIndex();
2667 TreeTablePosition<S,?> oldTP = null;
2668 if (clearIndex > -1) {
2669 for (int i = 0; i < selectedCellsMap.size(); i++) {
2670 TreeTablePosition<S,?> tp = selectedCellsMap.get(i);
2671 if (tp.getRow() == clearIndex) {
2672 oldTP = tp;
2673 selectedCellsMap.remove(tp);
2674 } else if (tp.getRow() == setIndex && !param.isSelected()) {
2675 selectedCellsMap.remove(tp);
2676 }
2677 }
2678 }
2679
2680 if (oldTP != null && param.isSelected()) {
2681 TreeTablePosition<S,?> newTP = new TreeTablePosition<>(
2682 treeTableView, param.getSetIndex(), oldTP.getTableColumn());
2683
2684 selectedCellsMap.add(newTP);
2685 }
2686
2687 stopAtomic();
2688
2689 return null;
2690 }
2691 });
2692 }
2693 };
2694
2695 private WeakChangeListener<TreeItem<S>> weakRootPropertyListener =
2696 new WeakChangeListener<>(rootPropertyListener);
2697
2698 private WeakEventHandler<TreeItem.TreeModificationEvent<S>> weakTreeItemListener;
2699
2700
2701
2702 /***********************************************************************
2703 * *
2704 * Observable properties (and getters/setters) *
2705 * *
2706 **********************************************************************/
2707
2708 // the only 'proper' internal data structure, selectedItems and selectedIndices
2709 // are both 'read-only and unbacked'.
2710 private final SelectedCellsMap<TreeTablePosition<S,?>> selectedCellsMap;
2711
2712 private final ReadOnlyUnbackedObservableList<TreeTablePosition<S,?>> selectedCellsSeq;
2713 @Override public ObservableList<TreeTablePosition<S,?>> getSelectedCells() {
2714 return selectedCellsSeq;
2715 }
2716
2717
2718 /***********************************************************************
2719 * *
2720 * Internal properties *
2721 * *
2722 **********************************************************************/
2723
2724
2725
2726 /***********************************************************************
2727 * *
2728 * Public selection API *
2729 * *
2730 **********************************************************************/
2731
2732 @Override public void clearAndSelect(int row) {
2733 clearAndSelect(row, null);
2734 }
2735
2736 @Override public void clearAndSelect(int row, TableColumnBase<TreeItem<S>,?> column) {
2737 if (row < 0 || row >= getItemCount()) return;
2738
2739 final TreeTablePosition<S,?> newTablePosition = new TreeTablePosition<>(getTreeTableView(), row, (TreeTableColumn<S,?>)column);
2740 final boolean isCellSelectionEnabled = isCellSelectionEnabled();
2741
2742 // replace the anchor
2743 TreeTableCellBehavior.setAnchor(treeTableView, newTablePosition, false);
2744
2745 // firstly we make a copy of the selection, so that we can send out
2746 // the correct details in the selection change event.
2747 List<TreeTablePosition<S,?>> previousSelection = new ArrayList<>(selectedCellsMap.getSelectedCells());
2748
2749 // secondly we check if we can short-circuit out of here because the new selection
2750 // equals the current selection
2751 final boolean wasSelected = isSelected(row, column);
2752 if (wasSelected && previousSelection.size() == 1) {
2753 // before we return, we double-check that the selected item
2754 // is equal to the item in the given index
2755 TreeTablePosition<S,?> selectedCell = getSelectedCells().get(0);
2756 if (getSelectedItem() == getModelItem(row)) {
2757 if (selectedCell.getRow() == row && selectedCell.getTableColumn() == column) {
2758 return;
2759 }
2760 }
2761 }
2762
2763 // RT-32411: We used to call quietClearSelection() here, but this
2764 // resulted in the selectedItems and selectedIndices lists never
2765 // reporting that they were empty.
2766 // makeAtomic toggle added to resolve RT-32618
2767 startAtomic();
2768
2769 // then clear the current selection
2770 clearSelection();
2771
2772 // and select the new cell
2773 select(row, column);
2774
2775 stopAtomic();
2776
2777 // We remove the new selection from the list seeing as it is not removed.
2778 if (isCellSelectionEnabled) {
2779 previousSelection.remove(newTablePosition);
2780 } else {
2781 for (TreeTablePosition<S,?> tp : previousSelection) {
2782 if (tp.getRow() == row) {
2783 previousSelection.remove(tp);
2784 break;
2785 }
2786 }
2787 }
2788
2789 // fire off a single add/remove/replace notification (rather than
2790 // individual remove and add notifications) - see RT-33324
2791 ListChangeListener.Change<TreeTablePosition<S, ?>> change;
2792
2793 /*
2794 * getFrom() documentation:
2795 * If wasAdded is true, the interval contains all the values that were added.
2796 * If wasPermutated is true, the interval marks the values that were permutated.
2797 * If wasRemoved is true and wasAdded is false, getFrom() and getTo() should
2798 * return the same number - the place where the removed elements were positioned in the list.
2799 */
2800 if (wasSelected) {
2801 change = ControlUtils.buildClearAndSelectChange(selectedCellsSeq, previousSelection, row);
2802 } else {
2803 final int changeIndex = isCellSelectionEnabled ? 0 : Math.max(0, selectedCellsSeq.indexOf(newTablePosition));
2804 final int changeSize = isCellSelectionEnabled ? getSelectedCells().size() : 1;
2805 change = new NonIterableChange.GenericAddRemoveChange<>(
2806 changeIndex, changeIndex + changeSize, previousSelection, selectedCellsSeq);
2807 // selectedCellsSeq._beginChange();
2808 // selectedCellsSeq._nextAdd(changeIndex, changeIndex + changeSize);
2809 // selectedCellsSeq._nextRemove(changeIndex, previousSelection);
2810 // selectedCellsSeq._endChange();
2811 }
2812
2813 fireCustomSelectedCellsListChangeEvent(change);
2814 }
2815
2816 @Override public void select(int row) {
2817 select(row, null);
2818 }
2819
2820 @Override public void select(int row, TableColumnBase<TreeItem<S>,?> column) {
2821 // TODO we need to bring in the TreeView selection stuff here...
2822 if (row < 0 || row >= getRowCount()) return;
2823
2824 // if I'm in cell selection mode but the column is null, select each
2825 // of the contained cells individually
2826 if (isCellSelectionEnabled() && column == null) {
2827 List<TreeTableColumn<S,?>> columns = getTreeTableView().getVisibleLeafColumns();
2828 for (int i = 0; i < columns.size(); i++) {
2829 select(row, columns.get(i));
2830 }
2831 return;
2832 }
2833
2834 if (TableCellBehavior.hasDefaultAnchor(treeTableView)) {
2835 TableCellBehavior.removeAnchor(treeTableView);
2836 }
2837
2838 if (getSelectionMode() == SelectionMode.SINGLE) {
2839 quietClearSelection();
2840 }
2841 selectedCellsMap.add(new TreeTablePosition<>(getTreeTableView(), row, (TreeTableColumn<S,?>)column));
2842
2843 updateSelectedIndex(row);
2844 focus(row, (TreeTableColumn<S, ?>) column);
2845 }
2846
2847 @Override public void select(TreeItem<S> obj) {
2848 if (obj == null && getSelectionMode() == SelectionMode.SINGLE) {
2849 clearSelection();
2850 return;
2851 }
2852
2853 int firstIndex = treeTableView.getRow(obj);
2854 if (firstIndex > -1) {
2855 if (isSelected(firstIndex)) {
2856 return;
2857 }
2858
2859 if (getSelectionMode() == SelectionMode.SINGLE) {
2860 quietClearSelection();
2861 }
2862
2863 select(firstIndex);
2864 } else {
2865 // if we are here, we did not find the item in the entire data model.
2866 // Even still, we allow for this item to be set to the give object.
2867 // We expect that in concrete subclasses of this class we observe the
2868 // data model such that we check to see if the given item exists in it,
2869 // whilst SelectedIndex == -1 && SelectedItem != null.
2870 setSelectedIndex(-1);
2871 setSelectedItem(obj);
2872 }
2873 }
2874
2875 @Override public void selectIndices(int row, int... rows) {
2876 if (rows == null) {
2877 select(row);
2878 return;
2879 }
2880
2881 /*
2882 * Performance optimisation - if multiple selection is disabled, only
2883 * process the end-most row index.
2884 */
2885 int rowCount = getRowCount();
2886
2887 if (getSelectionMode() == SelectionMode.SINGLE) {
2888 quietClearSelection();
2889
2890 for (int i = rows.length - 1; i >= 0; i--) {
2891 int index = rows[i];
2892 if (index >= 0 && index < rowCount) {
2893 select(index);
2894 break;
2895 }
2896 }
2897
2898 if (selectedCellsMap.isEmpty()) {
2899 if (row > 0 && row < rowCount) {
2900 select(row);
2901 }
2902 }
2903 } else {
2904 int lastIndex = -1;
2905 Set<TreeTablePosition<S,?>> positions = new LinkedHashSet<>();
2906
2907 // --- firstly, we special-case the non-varargs 'row' argument
2908 if (row >= 0 && row < rowCount) {
2909 // if I'm in cell selection mode, we want to select each
2910 // of the contained cells individually
2911 if (isCellSelectionEnabled()) {
2912 List<TreeTableColumn<S,?>> columns = getTreeTableView().getVisibleLeafColumns();
2913 for (int column = 0; column < columns.size(); column++) {
2914 if (! selectedCellsMap.isSelected(row, column)) {
2915 positions.add(new TreeTablePosition<>(getTreeTableView(), row, columns.get(column)));
2916 }
2917 }
2918 } else {
2919 boolean match = selectedCellsMap.isSelected(row, -1);
2920 if (!match) {
2921 positions.add(new TreeTablePosition<>(getTreeTableView(), row, null));
2922 }
2923 }
2924
2925 lastIndex = row;
2926 }
2927
2928 // --- now we iterate through all varargs values
2929 for (int i = 0; i < rows.length; i++) {
2930 int index = rows[i];
2931 if (index < 0 || index >= rowCount) continue;
2932 lastIndex = index;
2933
2934 if (isCellSelectionEnabled()) {
2935 List<TreeTableColumn<S,?>> columns = getTreeTableView().getVisibleLeafColumns();
2936 for (int column = 0; column < columns.size(); column++) {
2937 if (! selectedCellsMap.isSelected(index, column)) {
2938 positions.add(new TreeTablePosition<>(getTreeTableView(), index, columns.get(column)));
2939 lastIndex = index;
2940 }
2941 }
2942 } else {
2943 if (! selectedCellsMap.isSelected(index, -1)) {
2944 // if we are here then we have successfully gotten through the for-loop above
2945 positions.add(new TreeTablePosition<>(getTreeTableView(), index, null));
2946 }
2947 }
2948 }
2949
2950 selectedCellsMap.addAll(positions);
2951
2952 if (lastIndex != -1) {
2953 select(lastIndex);
2954 }
2955 }
2956 }
2957
2958 @Override public void selectAll() {
2959 if (getSelectionMode() == SelectionMode.SINGLE) return;
2960
2961 if (isCellSelectionEnabled()) {
2962 List<TreeTablePosition<S,?>> indices = new ArrayList<>();
2963 TreeTableColumn<S,?> column;
2964 TreeTablePosition<S,?> tp = null;
2965 for (int col = 0; col < getTreeTableView().getVisibleLeafColumns().size(); col++) {
2966 column = getTreeTableView().getVisibleLeafColumns().get(col);
2967 for (int row = 0; row < getRowCount(); row++) {
2968 tp = new TreeTablePosition<>(getTreeTableView(), row, column);
2969 indices.add(tp);
2970 }
2971 }
2972 selectedCellsMap.setAll(indices);
2973
2974 if (tp != null) {
2975 select(tp.getRow(), tp.getTableColumn());
2976 focus(tp.getRow(), tp.getTableColumn());
2977 }
2978 } else {
2979 List<TreeTablePosition<S,?>> indices = new ArrayList<>();
2980 for (int i = 0; i < getRowCount(); i++) {
2981 indices.add(new TreeTablePosition<>(getTreeTableView(), i, null));
2982 }
2983 selectedCellsMap.setAll(indices);
2984
2985 int focusedIndex = getFocusedIndex();
2986 if (focusedIndex == -1) {
2987 final int itemCount = getItemCount();
2988 if (itemCount > 0) {
2989 select(itemCount - 1);
2990 focus(indices.get(indices.size() - 1));
2991 }
2992 } else {
2993 select(focusedIndex);
2994 focus(focusedIndex);
2995 }
2996 }
2997 }
2998
2999 @Override public void selectRange(int minRow, TableColumnBase<TreeItem<S>,?> minColumn,
3000 int maxRow, TableColumnBase<TreeItem<S>,?> maxColumn) {
3001 if (getSelectionMode() == SelectionMode.SINGLE) {
3002 quietClearSelection();
3003 select(maxRow, maxColumn);
3004 return;
3005 }
3006
3007 startAtomic();
3008
3009 final int itemCount = getItemCount();
3010 final boolean isCellSelectionEnabled = isCellSelectionEnabled();
3011
3012 final int minColumnIndex = treeTableView.getVisibleLeafIndex((TreeTableColumn<S,?>)minColumn);
3013 final int maxColumnIndex = treeTableView.getVisibleLeafIndex((TreeTableColumn<S,?>)maxColumn);
3014 final int _minColumnIndex = Math.min(minColumnIndex, maxColumnIndex);
3015 final int _maxColumnIndex = Math.max(minColumnIndex, maxColumnIndex);
3016
3017 final int _minRow = Math.min(minRow, maxRow);
3018 final int _maxRow = Math.max(minRow, maxRow);
3019
3020 List<TreeTablePosition<S,?>> cellsToSelect = new ArrayList<>();
3021
3022 for (int _row = _minRow; _row <= _maxRow; _row++) {
3023 // begin copy/paste of select(int, column) method (with some
3024 // slight modifications)
3025 if (_row < 0 || _row >= itemCount) continue;
3026
3027 if (! isCellSelectionEnabled) {
3028 cellsToSelect.add(new TreeTablePosition<>(treeTableView, _row, (TreeTableColumn<S,?>)minColumn));
3029 } else {
3030 for (int _col = _minColumnIndex; _col <= _maxColumnIndex; _col++) {
3031 final TreeTableColumn<S, ?> column = treeTableView.getVisibleLeafColumn(_col);
3032
3033 // if I'm in cell selection mode but the column is null, I don't want
3034 // to select the whole row instead...
3035 if (column == null && isCellSelectionEnabled) continue;
3036
3037 cellsToSelect.add(new TreeTablePosition<>(treeTableView, _row, column));
3038 // end copy/paste
3039 }
3040 }
3041 }
3042
3043 // to prevent duplication we remove all currently selected cells from
3044 // our list of cells to select.
3045 cellsToSelect.removeAll(getSelectedCells());
3046
3047 selectedCellsMap.addAll(cellsToSelect);
3048 stopAtomic();
3049
3050 // fire off events
3051 // Note that focus and selection always goes to maxRow, not _maxRow.
3052 updateSelectedIndex(maxRow);
3053 focus(maxRow, (TreeTableColumn<S,?>)maxColumn);
3054
3055 final TreeTableColumn<S,?> startColumn = (TreeTableColumn<S,?>)minColumn;
3056 final TreeTableColumn<S,?> endColumn = isCellSelectionEnabled ? (TreeTableColumn<S,?>)maxColumn : startColumn;
3057 final int startChangeIndex = selectedCellsMap.indexOf(new TreeTablePosition<>(treeTableView, minRow, startColumn));
3058 final int endChangeIndex = selectedCellsMap.indexOf(new TreeTablePosition<>(treeTableView, maxRow, endColumn));
3059
3060 if (startChangeIndex > -1 && endChangeIndex > -1) {
3061 final int startIndex = Math.min(startChangeIndex, endChangeIndex);
3062 final int endIndex = Math.max(startChangeIndex, endChangeIndex);
3063
3064 ListChangeListener.Change c = new NonIterableChange.SimpleAddChange<>(startIndex, endIndex + 1, selectedCellsSeq);
3065 fireCustomSelectedCellsListChangeEvent(c);
3066 // selectedCellsSeq.fireChange(() -> selectedCellsSeq._nextAdd(startIndex, endIndex + 1));
3067 }
3068 }
3069
3070 @Override public void clearSelection(int index) {
3071 clearSelection(index, null);
3072 }
3073
3074 @Override
3075 public void clearSelection(int row, TableColumnBase<TreeItem<S>,?> column) {
3076 clearSelection(new TreeTablePosition<S,Object>(getTreeTableView(), row, (TreeTableColumn)column));
3077 }
3078
3079 private void clearSelection(TreeTablePosition<S,?> tp) {
3080 final boolean csMode = isCellSelectionEnabled();
3081 final int row = tp.getRow();
3082 final boolean columnIsNull = tp.getTableColumn() == null;
3083
3084 List<TreeTablePosition> toRemove = new ArrayList<>();
3085 for (TreeTablePosition pos : getSelectedCells()) {
3086 if (!csMode) {
3087 if (pos.getRow() == row) {
3088 toRemove.add(pos);
3089 break;
3090 }
3091 } else {
3092 if (columnIsNull && pos.getRow() == row) {
3093 // if we are in cell selection mode and the column is null,
3094 // we remove all items in the row
3095 toRemove.add(pos);
3096 } else if (pos.equals(tp)) {
3097 toRemove.add(tp);
3098 break;
3099 }
3100 }
3101 }
3102 toRemove.stream().forEach(selectedCellsMap::remove);
3103
3104 if (isEmpty() && ! isAtomic()) {
3105 updateSelectedIndex(-1);
3106 selectedCellsMap.clear();
3107 }
3108 }
3109
3110 @Override public void clearSelection() {
3111 final List<TreeTablePosition<S,?>> removed = new ArrayList<>((Collection)getSelectedCells());
3112
3113 quietClearSelection();
3114
3115 if (! isAtomic()) {
3116 updateSelectedIndex(-1);
3117 focus(-1);
3118
3119 if (!removed.isEmpty()) {
3120 // selectedCellsSeq.fireChange(() -> selectedCellsSeq._nextRemove(0, removed));
3121 ListChangeListener.Change<TreeTablePosition<S, ?>> c = new NonIterableChange<TreeTablePosition<S, ?>>(0, 0, selectedCellsSeq) {
3122 @Override public List<TreeTablePosition<S, ?>> getRemoved() {
3123 return removed;
3124 }
3125 };
3126 fireCustomSelectedCellsListChangeEvent(c);
3127 }
3128 }
3129 }
3130
3131 private void quietClearSelection() {
3132 startAtomic();
3133 selectedCellsMap.clear();
3134 stopAtomic();
3135 }
3136
3137 @Override public boolean isSelected(int index) {
3138 return isSelected(index, null);
3139 }
3140
3141 @Override public boolean isSelected(int row, TableColumnBase<TreeItem<S>,?> column) {
3142 // When in cell selection mode, if the column is null, then we interpret
3143 // the users query to be asking if _all_ of the cells in the row are selected,
3144 // rather than if _any_ of the cells in the row are selected.
3145 final boolean isCellSelectionEnabled = isCellSelectionEnabled();
3146 if (isCellSelectionEnabled && column == null) {
3147 int columnCount = treeTableView.getVisibleLeafColumns().size();
3148 for (int col = 0; col < columnCount; col++) {
3149 if (!selectedCellsMap.isSelected(row, col)) {
3150 return false;
3151 }
3152 }
3153 return true;
3154 } else {
3155 int columnIndex = !isCellSelectionEnabled || column == null ? -1 : treeTableView.getVisibleLeafIndex((TreeTableColumn<S, ?>) column);
3156 return selectedCellsMap.isSelected(row, columnIndex);
3157 }
3158 }
3159
3160 @Override public boolean isEmpty() {
3161 return selectedCellsMap.isEmpty();
3162 }
3163
3164 @Override public void selectPrevious() {
3165 if (isCellSelectionEnabled()) {
3166 // in cell selection mode, we have to wrap around, going from
3167 // right-to-left, and then wrapping to the end of the previous line
3168 TreeTablePosition<S,?> pos = getFocusedCell();
3169 if (pos.getColumn() - 1 >= 0) {
3170 // go to previous row
3171 select(pos.getRow(), getTableColumn(pos.getTableColumn(), -1));
3172 } else if (pos.getRow() < getRowCount() - 1) {
3173 // wrap to end of previous row
3174 select(pos.getRow() - 1, getTableColumn(getTreeTableView().getVisibleLeafColumns().size() - 1));
3175 }
3176 } else {
3177 int focusIndex = getFocusedIndex();
3178 if (focusIndex == -1) {
3179 select(getRowCount() - 1);
3180 } else if (focusIndex > 0) {
3181 select(focusIndex - 1);
3182 }
3183 }
3184 }
3185
3186 @Override public void selectNext() {
3187 if (isCellSelectionEnabled()) {
3188 // in cell selection mode, we have to wrap around, going from
3189 // left-to-right, and then wrapping to the start of the next line
3190 TreeTablePosition<S,?> pos = getFocusedCell();
3191 if (pos.getColumn() + 1 < getTreeTableView().getVisibleLeafColumns().size()) {
3192 // go to next column
3193 select(pos.getRow(), getTableColumn(pos.getTableColumn(), 1));
3194 } else if (pos.getRow() < getRowCount() - 1) {
3195 // wrap to start of next row
3196 select(pos.getRow() + 1, getTableColumn(0));
3197 }
3198 } else {
3199 int focusIndex = getFocusedIndex();
3200 if (focusIndex == -1) {
3201 select(0);
3202 } else if (focusIndex < getRowCount() -1) {
3203 select(focusIndex + 1);
3204 }
3205 }
3206 }
3207
3208 @Override public void selectAboveCell() {
3209 TreeTablePosition<S,?> pos = getFocusedCell();
3210 if (pos.getRow() == -1) {
3211 select(getRowCount() - 1);
3212 } else if (pos.getRow() > 0) {
3213 select(pos.getRow() - 1, pos.getTableColumn());
3214 }
3215 }
3216
3217 @Override public void selectBelowCell() {
3218 TreeTablePosition<S,?> pos = getFocusedCell();
3219
3220 if (pos.getRow() == -1) {
3221 select(0);
3222 } else if (pos.getRow() < getRowCount() -1) {
3223 select(pos.getRow() + 1, pos.getTableColumn());
3224 }
3225 }
3226
3227 @Override public void selectFirst() {
3228 TreeTablePosition<S,?> focusedCell = getFocusedCell();
3229
3230 if (getSelectionMode() == SelectionMode.SINGLE) {
3231 quietClearSelection();
3232 }
3233
3234 if (getRowCount() > 0) {
3235 if (isCellSelectionEnabled()) {
3236 select(0, focusedCell.getTableColumn());
3237 } else {
3238 select(0);
3239 }
3240 }
3241 }
3242
3243 @Override public void selectLast() {
3244 TreeTablePosition<S,?> focusedCell = getFocusedCell();
3245
3246 if (getSelectionMode() == SelectionMode.SINGLE) {
3247 quietClearSelection();
3248 }
3249
3250 int numItems = getRowCount();
3251 if (numItems > 0 && getSelectedIndex() < numItems - 1) {
3252 if (isCellSelectionEnabled()) {
3253 select(numItems - 1, focusedCell.getTableColumn());
3254 } else {
3255 select(numItems - 1);
3256 }
3257 }
3258 }
3259
3260 @Override public void selectLeftCell() {
3261 if (! isCellSelectionEnabled()) return;
3262
3263 TreeTablePosition<S,?> pos = getFocusedCell();
3264 if (pos.getColumn() - 1 >= 0) {
3265 select(pos.getRow(), getTableColumn(pos.getTableColumn(), -1));
3266 }
3267 }
3268
3269 @Override public void selectRightCell() {
3270 if (! isCellSelectionEnabled()) return;
3271
3272 TreeTablePosition<S,?> pos = getFocusedCell();
3273 if (pos.getColumn() + 1 < getTreeTableView().getVisibleLeafColumns().size()) {
3274 select(pos.getRow(), getTableColumn(pos.getTableColumn(), 1));
3275 }
3276 }
3277
3278
3279
3280 /***********************************************************************
3281 * *
3282 * Support code *
3283 * *
3284 **********************************************************************/
3285
3286 private void updateDefaultSelection() {
3287 // when the items list totally changes, we should clear out
3288 // the selection
3289 int newSelectionIndex = -1;
3290 TreeItem<S> selectedItem = getSelectedItem();
3291 if (selectedItem != null) {
3292 newSelectionIndex = treeTableView.getRow(selectedItem);
3293 }
3294
3295 // we put focus onto the first item, if there is at least
3296 // one item in the list
3297 int newFocusIndex = newSelectionIndex != -1 ? newSelectionIndex : treeTableView.getExpandedItemCount() > 0 ? 0 : -1;
3298
3299 clearSelection();
3300 select(newSelectionIndex, isCellSelectionEnabled() ? getTableColumn(0) : null);
3301 focus(newFocusIndex, isCellSelectionEnabled() ? getTableColumn(0) : null);
3302 }
3303
3304 private TreeTableColumn<S,?> getTableColumn(int pos) {
3305 return getTreeTableView().getVisibleLeafColumn(pos);
3306 }
3307
3308 // Gets a table column to the left or right of the current one, given an offset
3309 private TreeTableColumn<S,?> getTableColumn(TreeTableColumn<S,?> column, int offset) {
3310 int columnIndex = getTreeTableView().getVisibleLeafIndex(column);
3311 int newColumnIndex = columnIndex + offset;
3312 return getTreeTableView().getVisibleLeafColumn(newColumnIndex);
3313 }
3314
3315 private void updateSelectedIndex(int row) {
3316 setSelectedIndex(row);
3317 setSelectedItem(getModelItem(row));
3318 }
3319
3320 @Override public void focus(int row) {
3321 focus(row, null);
3322 }
3323
3324 private void focus(int row, TreeTableColumn<S,?> column) {
3325 focus(new TreeTablePosition<>(getTreeTableView(), row, column));
3326 }
3327
3328 private void focus(TreeTablePosition<S,?> pos) {
3329 if (getTreeTableView().getFocusModel() == null) return;
3330
3331 getTreeTableView().getFocusModel().focus(pos.getRow(), pos.getTableColumn());
3332 getTreeTableView().notifyAccessibleAttributeChanged(AccessibleAttribute.FOCUS_ITEM);
3333 }
3334
3335 @Override public int getFocusedIndex() {
3336 return getFocusedCell().getRow();
3337 }
3338
3339 private TreeTablePosition<S,?> getFocusedCell() {
3340 if (treeTableView.getFocusModel() == null) {
3341 return new TreeTablePosition<>(treeTableView, -1, null);
3342 }
3343 return treeTableView.getFocusModel().getFocusedCell();
3344 }
3345
3346 private int getRowCount() {
3347 return treeTableView.getExpandedItemCount();
3348 }
3349
3350 private void fireCustomSelectedCellsListChangeEvent(ListChangeListener.Change<? extends TreeTablePosition<S,?>> c) {
3351 ControlUtils.updateSelectedIndices(this, c);
3352
3353 if (isAtomic()) {
3354 return;
3355 }
3356
3357 selectedCellsSeq.callObservers(new MappingChange<>(c, MappingChange.NOOP_MAP, selectedCellsSeq));
3358 }
3359 }
3360
3361
3362
3363
3364 /**
3365 * A {@link FocusModel} with additional functionality to support the requirements
3366 * of a TableView control.
3367 *
3368 * @see TableView
3369 * @since JavaFX 8.0
3370 */
3371 public static class TreeTableViewFocusModel<S> extends TableFocusModel<TreeItem<S>, TreeTableColumn<S,?>> {
3372
3373 private final TreeTableView<S> treeTableView;
3374
3375 private final TreeTablePosition EMPTY_CELL;
3376
3377 /**
3378 * Creates a default TableViewFocusModel instance that will be used to
3379 * manage focus of the provided TableView control.
3380 *
3381 * @param treeTableView The tableView upon which this focus model operates.
3382 * @throws NullPointerException The TableView argument can not be null.
3383 */
3384 public TreeTableViewFocusModel(final TreeTableView<S> treeTableView) {
3385 if (treeTableView == null) {
3386 throw new NullPointerException("TableView can not be null");
3387 }
3388
3389 this.treeTableView = treeTableView;
3390 this.EMPTY_CELL = new TreeTablePosition<>(treeTableView, -1, null);
3391
3392 this.treeTableView.rootProperty().addListener(weakRootPropertyListener);
3393 updateTreeEventListener(null, treeTableView.getRoot());
3394
3395 int focusRow = getItemCount() > 0 ? 0 : -1;
3396 TreeTablePosition<S,?> pos = new TreeTablePosition<>(treeTableView, focusRow, null);
3397 setFocusedCell(pos);
3398
3399 treeTableView.showRootProperty().addListener(o -> {
3400 if (isFocused(0)) {
3401 focus(-1);
3402 focus(0);
3403 }
3404 });
3405
3406 focusedCellProperty().addListener(o -> {
3407 treeTableView.notifyAccessibleAttributeChanged(AccessibleAttribute.FOCUS_ITEM);
3408 });
3409 }
3410
3411 private final ChangeListener<TreeItem<S>> rootPropertyListener = (observable, oldValue, newValue) -> {
3412 updateTreeEventListener(oldValue, newValue);
3413 };
3414
3415 private final WeakChangeListener<TreeItem<S>> weakRootPropertyListener =
3416 new WeakChangeListener<>(rootPropertyListener);
3417
3418 private void updateTreeEventListener(TreeItem<S> oldRoot, TreeItem<S> newRoot) {
3419 if (oldRoot != null && weakTreeItemListener != null) {
3420 oldRoot.removeEventHandler(TreeItem.<S>expandedItemCountChangeEvent(), weakTreeItemListener);
3421 }
3422
3423 if (newRoot != null) {
3424 weakTreeItemListener = new WeakEventHandler<>(treeItemListener);
3425 newRoot.addEventHandler(TreeItem.<S>expandedItemCountChangeEvent(), weakTreeItemListener);
3426 }
3427 }
3428
3429 private EventHandler<TreeItem.TreeModificationEvent<S>> treeItemListener = new EventHandler<TreeItem.TreeModificationEvent<S>>() {
3430 @Override public void handle(TreeItem.TreeModificationEvent<S> e) {
3431 // don't shift focus if the event occurred on a tree item after
3432 // the focused row, or if there is no focus index at present
3433 if (getFocusedIndex() == -1) return;
3434
3435 int shift = 0;
3436 if (e.getChange() != null) {
3437 e.getChange().next();
3438 }
3439
3440 do {
3441 int row = treeTableView.getRow(e.getTreeItem());
3442
3443 if (e.wasExpanded()) {
3444 if (row < getFocusedIndex()) {
3445 // need to shuffle selection by the number of visible children
3446 shift += e.getTreeItem().getExpandedDescendentCount(false) - 1;
3447 }
3448 } else if (e.wasCollapsed()) {
3449 if (row < getFocusedIndex()) {
3450 // need to shuffle selection by the number of visible children
3451 // that were just hidden
3452 shift += -e.getTreeItem().previousExpandedDescendentCount + 1;
3453 }
3454 } else if (e.wasAdded()) {
3455 // get the TreeItem the event occurred on - we only need to
3456 // shift if the tree item is expanded
3457 TreeItem<S> eventTreeItem = e.getTreeItem();
3458 if (eventTreeItem.isExpanded()) {
3459 for (int i = 0; i < e.getAddedChildren().size(); i++) {
3460 // get the added item and determine the row it is in
3461 TreeItem<S> item = e.getAddedChildren().get(i);
3462 row = treeTableView.getRow(item);
3463
3464 if (item != null && row <= (shift+getFocusedIndex())) {
3465 shift += item.getExpandedDescendentCount(false);
3466 }
3467 }
3468 }
3469 } else if (e.wasRemoved()) {
3470 row += e.getFrom() + 1;
3471
3472 for (int i = 0; i < e.getRemovedChildren().size(); i++) {
3473 TreeItem<S> item = e.getRemovedChildren().get(i);
3474 if (item != null && item.equals(getFocusedItem())) {
3475 focus(Math.max(0, getFocusedIndex() - 1));
3476 return;
3477 }
3478 }
3479
3480 if (row <= getFocusedIndex()) {
3481 // shuffle selection by the number of removed items
3482 shift += e.getTreeItem().isExpanded() ? -e.getRemovedSize() : 0;
3483 }
3484 }
3485 } while (e.getChange() != null && e.getChange().next());
3486
3487 if (shift != 0) {
3488 TreeTablePosition<S, ?> focusedCell = getFocusedCell();
3489 final int newFocus = focusedCell.getRow() + shift;
3490 if (newFocus >= 0) {
3491 Platform.runLater(() -> focus(newFocus, focusedCell.getTableColumn()));
3492 }
3493 }
3494 }
3495 };
3496
3497 private WeakEventHandler<TreeItem.TreeModificationEvent<S>> weakTreeItemListener;
3498
3499 /** {@inheritDoc} */
3500 @Override protected int getItemCount() {
3501 // if (tableView.getItems() == null) return -1;
3502 // return tableView.getItems().size();
3503 return treeTableView.getExpandedItemCount();
3504 }
3505
3506 /** {@inheritDoc} */
3507 @Override protected TreeItem<S> getModelItem(int index) {
3508 if (index < 0 || index >= getItemCount()) return null;
3509 return treeTableView.getTreeItem(index);
3510 }
3511
3512 /**
3513 * The position of the current item in the TableView which has the focus.
3514 */
3515 private ReadOnlyObjectWrapper<TreeTablePosition<S,?>> focusedCell;
3516 public final ReadOnlyObjectProperty<TreeTablePosition<S,?>> focusedCellProperty() {
3517 return focusedCellPropertyImpl().getReadOnlyProperty();
3518 }
3519 private void setFocusedCell(TreeTablePosition<S,?> value) { focusedCellPropertyImpl().set(value); }
3520 public final TreeTablePosition<S,?> getFocusedCell() { return focusedCell == null ? EMPTY_CELL : focusedCell.get(); }
3521
3522 private ReadOnlyObjectWrapper<TreeTablePosition<S,?>> focusedCellPropertyImpl() {
3523 if (focusedCell == null) {
3524 focusedCell = new ReadOnlyObjectWrapper<TreeTablePosition<S,?>>(EMPTY_CELL) {
3525 private TreeTablePosition<S,?> old;
3526 @Override protected void invalidated() {
3527 if (get() == null) return;
3528
3529 if (old == null || !old.equals(get())) {
3530 setFocusedIndex(get().getRow());
3531 setFocusedItem(getModelItem(getValue().getRow()));
3532
3533 old = get();
3534 }
3535 }
3536
3537 @Override
3538 public Object getBean() {
3539 return TreeTableView.TreeTableViewFocusModel.this;
3540 }
3541
3542 @Override
3543 public String getName() {
3544 return "focusedCell";
3545 }
3546 };
3547 }
3548 return focusedCell;
3549 }
3550
3551
3552 /**
3553 * Causes the item at the given index to receive the focus.
3554 *
3555 * @param row The row index of the item to give focus to.
3556 * @param column The column of the item to give focus to. Can be null.
3557 */
3558 @Override public void focus(int row, TreeTableColumn<S,?> column) {
3559 if (row < 0 || row >= getItemCount()) {
3560 setFocusedCell(EMPTY_CELL);
3561 } else {
3562 TreeTablePosition<S,?> oldFocusCell = getFocusedCell();
3563 TreeTablePosition<S,?> newFocusCell = new TreeTablePosition<>(treeTableView, row, column);
3564 setFocusedCell(newFocusCell);
3565
3566 if (newFocusCell.equals(oldFocusCell)) {
3567 // manually update the focus properties to ensure consistency
3568 setFocusedIndex(row);
3569 setFocusedItem(getModelItem(row));
3570 }
3571 }
3572 }
3573
3574 /**
3575 * Convenience method for setting focus on a particular row or cell
3576 * using a {@link TablePosition}.
3577 *
3578 * @param pos The table position where focus should be set.
3579 */
3580 public void focus(TreeTablePosition<S,?> pos) {
3581 if (pos == null) return;
3582 focus(pos.getRow(), pos.getTableColumn());
3583 }
3584
3585
3586 /***********************************************************************
3587 * *
3588 * Public API *
3589 * *
3590 **********************************************************************/
3591
3592 /**
3593 * Tests whether the row / cell at the given location currently has the
3594 * focus within the TableView.
3595 */
3596 @Override public boolean isFocused(int row, TreeTableColumn<S,?> column) {
3597 if (row < 0 || row >= getItemCount()) return false;
3598
3599 TreeTablePosition<S,?> cell = getFocusedCell();
3600 boolean columnMatch = column == null || column.equals(cell.getTableColumn());
3601
3602 return cell.getRow() == row && columnMatch;
3603 }
3604
3605 /**
3606 * Causes the item at the given index to receive the focus. This does not
3607 * cause the current selection to change. Updates the focusedItem and
3608 * focusedIndex properties such that <code>focusedIndex = -1</code> unless
3609 * <pre><code>0 <= index < model size</code></pre>.
3610 *
3611 * @param index The index of the item to get focus.
3612 */
3613 @Override public void focus(int index) {
3614 if (treeTableView.expandedItemCountDirty) {
3615 treeTableView.updateExpandedItemCount(treeTableView.getRoot());
3616 }
3617
3618 if (index < 0 || index >= getItemCount()) {
3619 setFocusedCell(EMPTY_CELL);
3620 } else {
3621 setFocusedCell(new TreeTablePosition<>(treeTableView, index, null));
3622 }
3623 }
3624
3625 /**
3626 * Attempts to move focus to the cell above the currently focused cell.
3627 */
3628 @Override public void focusAboveCell() {
3629 TreeTablePosition<S,?> cell = getFocusedCell();
3630
3631 if (getFocusedIndex() == -1) {
3632 focus(getItemCount() - 1, cell.getTableColumn());
3633 } else if (getFocusedIndex() > 0) {
3634 focus(getFocusedIndex() - 1, cell.getTableColumn());
3635 }
3636 }
3637
3638 /**
3639 * Attempts to move focus to the cell below the currently focused cell.
3640 */
3641 @Override public void focusBelowCell() {
3642 TreeTablePosition<S,?> cell = getFocusedCell();
3643 if (getFocusedIndex() == -1) {
3644 focus(0, cell.getTableColumn());
3645 } else if (getFocusedIndex() != getItemCount() -1) {
3646 focus(getFocusedIndex() + 1, cell.getTableColumn());
3647 }
3648 }
3649
3650 /**
3651 * Attempts to move focus to the cell to the left of the currently focused cell.
3652 */
3653 @Override public void focusLeftCell() {
3654 TreeTablePosition<S,?> cell = getFocusedCell();
3655 if (cell.getColumn() <= 0) return;
3656 focus(cell.getRow(), getTableColumn(cell.getTableColumn(), -1));
3657 }
3658
3659 /**
3660 * Attempts to move focus to the cell to the right of the the currently focused cell.
3661 */
3662 @Override public void focusRightCell() {
3663 TreeTablePosition<S,?> cell = getFocusedCell();
3664 if (cell.getColumn() == getColumnCount() - 1) return;
3665 focus(cell.getRow(), getTableColumn(cell.getTableColumn(), 1));
3666 }
3667
3668 /** {@inheritDoc} */
3669 @Override public void focusPrevious() {
3670 if (getFocusedIndex() == -1) {
3671 focus(0);
3672 } else if (getFocusedIndex() > 0) {
3673 focusAboveCell();
3674 }
3675 }
3676
3677 /** {@inheritDoc} */
3678 @Override public void focusNext() {
3679 if (getFocusedIndex() == -1) {
3680 focus(0);
3681 } else if (getFocusedIndex() != getItemCount() -1) {
3682 focusBelowCell();
3683 }
3684 }
3685
3686
3687
3688 /***********************************************************************
3689 * *
3690 * Private Implementation *
3691 * *
3692 **********************************************************************/
3693
3694 private int getColumnCount() {
3695 return treeTableView.getVisibleLeafColumns().size();
3696 }
3697
3698 // Gets a table column to the left or right of the current one, given an offset
3699 private TreeTableColumn<S,?> getTableColumn(TreeTableColumn<S,?> column, int offset) {
3700 int columnIndex = treeTableView.getVisibleLeafIndex(column);
3701 int newColumnIndex = columnIndex + offset;
3702 return treeTableView.getVisibleLeafColumn(newColumnIndex);
3703 }
3704 }
3705 }