1 /*******************************************************************************
2 * Copyright (c) 2012 Ericsson
4 * All rights reserved. This program and the accompanying materials are
5 * made available under the terms of the Eclipse Public License v1.0 which
6 * accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * Patrick Tasse - Initial API and implementation
11 *******************************************************************************/
13 package org
.eclipse
.linuxtools
.tmf
.ui
.widgets
.timegraph
;
15 import java
.util
.ArrayList
;
16 import java
.util
.Arrays
;
17 import java
.util
.HashMap
;
19 import org
.eclipse
.jface
.viewers
.ILabelProviderListener
;
20 import org
.eclipse
.jface
.viewers
.ISelectionChangedListener
;
21 import org
.eclipse
.jface
.viewers
.IStructuredSelection
;
22 import org
.eclipse
.jface
.viewers
.ITableLabelProvider
;
23 import org
.eclipse
.jface
.viewers
.ITreeContentProvider
;
24 import org
.eclipse
.jface
.viewers
.ITreeViewerListener
;
25 import org
.eclipse
.jface
.viewers
.SelectionChangedEvent
;
26 import org
.eclipse
.jface
.viewers
.StructuredSelection
;
27 import org
.eclipse
.jface
.viewers
.TreeExpansionEvent
;
28 import org
.eclipse
.jface
.viewers
.TreeViewer
;
29 import org
.eclipse
.jface
.viewers
.Viewer
;
30 import org
.eclipse
.linuxtools
.tmf
.ui
.widgets
.timegraph
.model
.ITimeGraphEntry
;
31 import org
.eclipse
.swt
.SWT
;
32 import org
.eclipse
.swt
.custom
.SashForm
;
33 import org
.eclipse
.swt
.events
.ControlAdapter
;
34 import org
.eclipse
.swt
.events
.ControlEvent
;
35 import org
.eclipse
.swt
.events
.MouseEvent
;
36 import org
.eclipse
.swt
.events
.MouseTrackAdapter
;
37 import org
.eclipse
.swt
.events
.MouseWheelListener
;
38 import org
.eclipse
.swt
.events
.PaintEvent
;
39 import org
.eclipse
.swt
.events
.PaintListener
;
40 import org
.eclipse
.swt
.events
.SelectionAdapter
;
41 import org
.eclipse
.swt
.events
.SelectionEvent
;
42 import org
.eclipse
.swt
.graphics
.Image
;
43 import org
.eclipse
.swt
.graphics
.Point
;
44 import org
.eclipse
.swt
.layout
.FillLayout
;
45 import org
.eclipse
.swt
.widgets
.Composite
;
46 import org
.eclipse
.swt
.widgets
.Display
;
47 import org
.eclipse
.swt
.widgets
.Event
;
48 import org
.eclipse
.swt
.widgets
.Listener
;
49 import org
.eclipse
.swt
.widgets
.Slider
;
50 import org
.eclipse
.swt
.widgets
.Tree
;
51 import org
.eclipse
.swt
.widgets
.TreeColumn
;
52 import org
.eclipse
.swt
.widgets
.TreeItem
;
55 * Time graph "combo" view (with the list/tree on the left and the gantt chart
59 * @author Patrick Tasse
61 public class TimeGraphCombo
extends Composite
{
63 // ------------------------------------------------------------------------
65 // ------------------------------------------------------------------------
67 private static final Object FILLER
= new Object();
69 // ------------------------------------------------------------------------
71 // ------------------------------------------------------------------------
74 private TreeViewer fTreeViewer
;
77 private TimeGraphViewer fTimeGraphViewer
;
79 // The selection listener map
80 private final HashMap
<ITimeGraphSelectionListener
, SelectionListenerWrapper
> fSelectionListenerMap
= new HashMap
<ITimeGraphSelectionListener
, SelectionListenerWrapper
>();
82 // Flag to block the tree selection changed listener when triggered by the time graph combo
83 private boolean fInhibitTreeSelection
= false;
85 // Number of filler rows used by the tree content provider
86 private int fNumFillerRows
;
88 // Calculated item height for Linux workaround
89 private int fLinuxItemHeight
= 0;
91 // ------------------------------------------------------------------------
93 // ------------------------------------------------------------------------
96 * The TreeContentProviderWrapper is used to insert filler items after
97 * the elements of the tree's real content provider.
99 private class TreeContentProviderWrapper
implements ITreeContentProvider
{
100 private final ITreeContentProvider contentProvider
;
102 public TreeContentProviderWrapper(ITreeContentProvider contentProvider
) {
103 this.contentProvider
= contentProvider
;
107 public void dispose() {
108 contentProvider
.dispose();
112 public void inputChanged(Viewer viewer
, Object oldInput
, Object newInput
) {
113 contentProvider
.inputChanged(viewer
, oldInput
, newInput
);
117 public Object
[] getElements(Object inputElement
) {
118 Object
[] elements
= contentProvider
.getElements(inputElement
);
119 // add filler elements to ensure alignment with time analysis viewer
120 Object
[] oElements
= Arrays
.copyOf(elements
, elements
.length
+ fNumFillerRows
, new Object
[0].getClass());
121 for (int i
= 0; i
< fNumFillerRows
; i
++) {
122 oElements
[elements
.length
+ i
] = FILLER
;
128 public Object
[] getChildren(Object parentElement
) {
129 if (parentElement
instanceof ITimeGraphEntry
) {
130 return contentProvider
.getChildren(parentElement
);
132 return new Object
[0];
137 public Object
getParent(Object element
) {
138 if (element
instanceof ITimeGraphEntry
) {
139 return contentProvider
.getParent(element
);
146 public boolean hasChildren(Object element
) {
147 if (element
instanceof ITimeGraphEntry
) {
148 return contentProvider
.hasChildren(element
);
156 * The TreeLabelProviderWrapper is used to intercept the filler items
157 * from the calls to the tree's real label provider.
159 private class TreeLabelProviderWrapper
implements ITableLabelProvider
{
160 private final ITableLabelProvider labelProvider
;
162 public TreeLabelProviderWrapper(ITableLabelProvider labelProvider
) {
163 this.labelProvider
= labelProvider
;
167 public void addListener(ILabelProviderListener listener
) {
168 labelProvider
.addListener(listener
);
172 public void dispose() {
173 labelProvider
.dispose();
177 public boolean isLabelProperty(Object element
, String property
) {
178 if (element
instanceof ITimeGraphEntry
) {
179 return labelProvider
.isLabelProperty(element
, property
);
186 public void removeListener(ILabelProviderListener listener
) {
187 labelProvider
.removeListener(listener
);
191 public Image
getColumnImage(Object element
, int columnIndex
) {
192 if (element
instanceof ITimeGraphEntry
) {
193 return labelProvider
.getColumnImage(element
, columnIndex
);
200 public String
getColumnText(Object element
, int columnIndex
) {
201 if (element
instanceof ITimeGraphEntry
) {
202 return labelProvider
.getColumnText(element
, columnIndex
);
211 * The SelectionListenerWrapper is used to intercept the filler items from
212 * the time graph combo's real selection listener, and to prevent double
213 * notifications from being sent when selection changes in both tree and
214 * time graph at the same time.
216 private class SelectionListenerWrapper
implements ISelectionChangedListener
, ITimeGraphSelectionListener
{
217 private final ITimeGraphSelectionListener listener
;
218 private ITimeGraphEntry selection
= null;
220 public SelectionListenerWrapper(ITimeGraphSelectionListener listener
) {
221 this.listener
= listener
;
225 public void selectionChanged(SelectionChangedEvent event
) {
226 if (fInhibitTreeSelection
) {
229 Object element
= ((IStructuredSelection
) event
.getSelection()).getFirstElement();
230 if (element
instanceof ITimeGraphEntry
) {
231 ITimeGraphEntry entry
= (ITimeGraphEntry
) element
;
232 if (entry
!= selection
) {
234 listener
.selectionChanged(new TimeGraphSelectionEvent(event
.getSource(), selection
));
240 public void selectionChanged(TimeGraphSelectionEvent event
) {
241 ITimeGraphEntry entry
= event
.getSelection();
242 if (entry
!= selection
) {
244 listener
.selectionChanged(new TimeGraphSelectionEvent(event
.getSource(), selection
));
249 // ------------------------------------------------------------------------
251 // ------------------------------------------------------------------------
254 * Constructs a new instance of this class given its parent
255 * and a style value describing its behavior and appearance.
257 * @param parent a widget which will be the parent of the new instance (cannot be null)
258 * @param style the style of widget to construct
260 public TimeGraphCombo(Composite parent
, int style
) {
261 super(parent
, style
);
262 setLayout(new FillLayout());
264 final SashForm sash
= new SashForm(this, SWT
.NONE
);
266 fTreeViewer
= new TreeViewer(sash
, SWT
.FULL_SELECTION
| SWT
.H_SCROLL
);
267 final Tree tree
= fTreeViewer
.getTree();
268 tree
.setHeaderVisible(true);
269 tree
.setLinesVisible(true);
271 fTimeGraphViewer
= new TimeGraphViewer(sash
, SWT
.NONE
);
272 fTimeGraphViewer
.setItemHeight(getItemHeight(tree
));
273 fTimeGraphViewer
.setHeaderHeight(tree
.getHeaderHeight());
274 fTimeGraphViewer
.setBorderWidth(tree
.getBorderWidth());
275 fTimeGraphViewer
.setNameWidthPref(0);
277 // Feature in Windows. The tree vertical bar reappears when
278 // the control is resized so we need to hide it again.
279 // Bug in Linux. The tree header height is 0 in constructor,
280 // so we need to reset it later when the control is resized.
281 tree
.addControlListener(new ControlAdapter() {
284 public void controlResized(ControlEvent e
) {
287 tree
.getVerticalBar().setEnabled(false);
288 // this can trigger controlResized recursively
289 tree
.getVerticalBar().setVisible(false);
292 fTimeGraphViewer
.setHeaderHeight(tree
.getHeaderHeight());
296 // ensure synchronization of expanded items between tree and time graph
297 fTreeViewer
.addTreeListener(new ITreeViewerListener() {
299 public void treeCollapsed(TreeExpansionEvent event
) {
300 fTimeGraphViewer
.setExpandedState((ITimeGraphEntry
) event
.getElement(), false);
304 public void treeExpanded(TreeExpansionEvent event
) {
305 fTimeGraphViewer
.setExpandedState((ITimeGraphEntry
) event
.getElement(), true);
309 // ensure synchronization of expanded items between tree and time graph
310 fTimeGraphViewer
.addTreeListener(new ITimeGraphTreeListener() {
312 public void treeCollapsed(TimeGraphTreeExpansionEvent event
) {
313 fTreeViewer
.setExpandedState(event
.getEntry(), false);
317 public void treeExpanded(TimeGraphTreeExpansionEvent event
) {
318 fTreeViewer
.setExpandedState(event
.getEntry(), true);
322 // prevent mouse button from selecting a filler tree item
323 tree
.addListener(SWT
.MouseDown
, new Listener() {
325 public void handleEvent(Event event
) {
326 TreeItem treeItem
= tree
.getItem(new Point(event
.x
, event
.y
));
327 if (treeItem
== null || treeItem
.getData() == FILLER
) {
329 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
330 if (treeItems
.size() == 0) {
331 fTreeViewer
.setSelection(new StructuredSelection());
332 fTimeGraphViewer
.setSelection(null);
335 // this prevents from scrolling up when selecting
336 // the partially visible tree item at the bottom
337 tree
.select(treeItems
.get(treeItems
.size() - 1));
338 fTreeViewer
.setSelection(new StructuredSelection());
339 fTimeGraphViewer
.setSelection(null);
344 // prevent mouse wheel from scrolling down into filler tree items
345 tree
.addListener(SWT
.MouseWheel
, new Listener() {
347 public void handleEvent(Event event
) {
349 Slider scrollBar
= fTimeGraphViewer
.getVerticalBar();
350 fTimeGraphViewer
.setTopIndex(scrollBar
.getSelection() - event
.count
);
351 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
352 if (treeItems
.size() == 0) {
355 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
356 tree
.setTopItem(treeItem
);
360 // prevent key stroke from selecting a filler tree item
361 tree
.addListener(SWT
.KeyDown
, new Listener() {
363 public void handleEvent(Event event
) {
364 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
365 if (treeItems
.size() == 0) {
366 fTreeViewer
.setSelection(new StructuredSelection());
370 if (event
.keyCode
== SWT
.ARROW_DOWN
) {
371 int index
= Math
.min(fTimeGraphViewer
.getSelectionIndex() + 1, treeItems
.size() - 1);
372 fTimeGraphViewer
.setSelection((ITimeGraphEntry
) treeItems
.get(index
).getData());
374 } else if (event
.keyCode
== SWT
.PAGE_DOWN
) {
375 int height
= tree
.getSize().y
- tree
.getHeaderHeight() - tree
.getHorizontalBar().getSize().y
;
376 int countPerPage
= height
/ getItemHeight(tree
);
377 int index
= Math
.min(fTimeGraphViewer
.getSelectionIndex() + countPerPage
- 1, treeItems
.size() - 1);
378 fTimeGraphViewer
.setSelection((ITimeGraphEntry
) treeItems
.get(index
).getData());
380 } else if (event
.keyCode
== SWT
.END
) {
381 fTimeGraphViewer
.setSelection((ITimeGraphEntry
) treeItems
.get(treeItems
.size() - 1).getData());
384 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
385 tree
.setTopItem(treeItem
);
386 if (fTimeGraphViewer
.getSelectionIndex() >= 0) {
387 fTreeViewer
.setSelection(new StructuredSelection(fTimeGraphViewer
.getSelection()));
389 fTreeViewer
.setSelection(new StructuredSelection());
394 // ensure alignment of top item between tree and time graph
395 fTimeGraphViewer
.getTimeGraphControl().addControlListener(new ControlAdapter() {
397 public void controlResized(ControlEvent e
) {
398 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
399 if (treeItems
.size() == 0) {
402 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
403 tree
.setTopItem(treeItem
);
407 // ensure synchronization of selected item between tree and time graph
408 fTreeViewer
.addSelectionChangedListener(new ISelectionChangedListener() {
410 public void selectionChanged(SelectionChangedEvent event
) {
411 if (fInhibitTreeSelection
) {
414 if (event
.getSelection() instanceof IStructuredSelection
) {
415 Object selection
= ((IStructuredSelection
) event
.getSelection()).getFirstElement();
416 if (selection
instanceof ITimeGraphEntry
) {
417 fTimeGraphViewer
.setSelection((ITimeGraphEntry
) selection
);
419 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
420 if (treeItems
.size() == 0) {
423 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
424 tree
.setTopItem(treeItem
);
429 // ensure synchronization of selected item between tree and time graph
430 fTimeGraphViewer
.addSelectionListener(new ITimeGraphSelectionListener() {
432 public void selectionChanged(TimeGraphSelectionEvent event
) {
433 ITimeGraphEntry entry
= fTimeGraphViewer
.getSelection();
434 fInhibitTreeSelection
= true; // block the tree selection changed listener
436 StructuredSelection selection
= new StructuredSelection(entry
);
437 fTreeViewer
.setSelection(selection
);
439 fTreeViewer
.setSelection(new StructuredSelection());
441 fInhibitTreeSelection
= false;
442 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
443 if (treeItems
.size() == 0) {
446 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
447 tree
.setTopItem(treeItem
);
451 // ensure alignment of top item between tree and time graph
452 fTimeGraphViewer
.getVerticalBar().addSelectionListener(new SelectionAdapter() {
454 public void widgetSelected(SelectionEvent e
) {
455 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
456 if (treeItems
.size() == 0) {
459 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
460 tree
.setTopItem(treeItem
);
464 // ensure alignment of top item between tree and time graph
465 fTimeGraphViewer
.getTimeGraphControl().addMouseWheelListener(new MouseWheelListener() {
467 public void mouseScrolled(MouseEvent e
) {
468 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
469 if (treeItems
.size() == 0) {
472 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
473 tree
.setTopItem(treeItem
);
477 // ensure the tree has focus control when mouse is over it if the time graph had control
478 fTreeViewer
.getControl().addMouseTrackListener(new MouseTrackAdapter() {
480 public void mouseEnter(MouseEvent e
) {
481 if (fTimeGraphViewer
.getTimeGraphControl().isFocusControl()) {
482 fTreeViewer
.getControl().setFocus();
487 // ensure the time graph has focus control when mouse is over it if the tree had control
488 fTimeGraphViewer
.getTimeGraphControl().addMouseTrackListener(new MouseTrackAdapter() {
490 public void mouseEnter(MouseEvent e
) {
491 if (fTreeViewer
.getControl().isFocusControl()) {
492 fTimeGraphViewer
.getTimeGraphControl().setFocus();
496 fTimeGraphViewer
.getTimeGraphScale().addMouseTrackListener(new MouseTrackAdapter() {
498 public void mouseEnter(MouseEvent e
) {
499 if (fTreeViewer
.getControl().isFocusControl()) {
500 fTimeGraphViewer
.getTimeGraphControl().setFocus();
505 // The filler rows are required to ensure alignment when the tree does not have a
506 // visible horizontal scroll bar. The tree does not allow its top item to be set
507 // to a value that would cause blank space to be drawn at the bottom of the tree.
508 fNumFillerRows
= Display
.getDefault().getBounds().height
/ getItemHeight(tree
);
510 sash
.setWeights(new int[] { 1, 1 });
513 // ------------------------------------------------------------------------
515 // ------------------------------------------------------------------------
518 * Returns this time graph combo's tree viewer.
520 * @return the tree viewer
522 public TreeViewer
getTreeViewer() {
527 * Returns this time graph combo's time graph viewer.
529 * @return the time graph viewer
531 public TimeGraphViewer
getTimeGraphViewer() {
532 return fTimeGraphViewer
;
535 // ------------------------------------------------------------------------
537 // ------------------------------------------------------------------------
540 * @see org.eclipse.swt.widgets.Control#redraw()
543 public void redraw() {
544 fTimeGraphViewer
.getControl().redraw();
548 // ------------------------------------------------------------------------
550 // ------------------------------------------------------------------------
553 * Sets the tree content provider used by this time graph combo.
555 * @param contentProvider the tree content provider
557 public void setTreeContentProvider(ITreeContentProvider contentProvider
) {
558 fTreeViewer
.setContentProvider(new TreeContentProviderWrapper(contentProvider
));
562 * Sets the tree label provider used by this time graph combo.
564 * @param treeLabelProvider the tree label provider
566 public void setTreeLabelProvider(ITableLabelProvider labelProvider
) {
567 fTreeViewer
.setLabelProvider(new TreeLabelProviderWrapper(labelProvider
));
571 * Sets the tree columns for this time graph combo.
573 * @param columnNames the tree column names
575 public void setTreeColumns(String
[] columnNames
) {
576 final Tree tree
= fTreeViewer
.getTree();
577 for (String columnName
: columnNames
) {
578 TreeColumn column
= new TreeColumn(tree
, SWT
.LEFT
);
579 column
.setText(columnName
);
586 * Sets the time graph provider used by this time graph combo.
588 * @param timeGraphProvider the time graph provider
590 public void setTimeGraphProvider(ITimeGraphPresentationProvider timeGraphProvider
) {
591 fTimeGraphViewer
.setTimeGraphProvider(timeGraphProvider
);
595 * Sets or clears the input for this time graph combo.
596 * The input array should only contain top-level elements.
598 * @param input the input of this time graph combo, or <code>null</code> if none
600 public void setInput(ITimeGraphEntry
[] input
) {
601 fInhibitTreeSelection
= true;
602 fTreeViewer
.setInput(input
);
603 fInhibitTreeSelection
= false;
604 fTreeViewer
.expandAll();
605 fTreeViewer
.getTree().getVerticalBar().setEnabled(false);
606 fTreeViewer
.getTree().getVerticalBar().setVisible(false);
607 fTimeGraphViewer
.setItemHeight(getItemHeight(fTreeViewer
.getTree()));
608 fTimeGraphViewer
.setInput(input
);
612 * Refreshes this time graph completely with information freshly obtained from its model.
614 public void refresh() {
615 fTreeViewer
.refresh();
616 fTimeGraphViewer
.refresh();
620 * Adds a listener for selection changes in this time graph combo.
622 * @param listener a selection listener
624 public void addSelectionListener(ITimeGraphSelectionListener listener
) {
625 SelectionListenerWrapper listenerWrapper
= new SelectionListenerWrapper(listener
);
626 fTreeViewer
.addSelectionChangedListener(listenerWrapper
);
627 fSelectionListenerMap
.put(listener
, listenerWrapper
);
628 fTimeGraphViewer
.addSelectionListener(listenerWrapper
);
632 * Removes the given selection listener from this time graph combo.
634 * @param listener a selection changed listener
636 public void removeSelectionListener(ITimeGraphSelectionListener listener
) {
637 SelectionListenerWrapper listenerWrapper
= fSelectionListenerMap
.remove(listener
);
638 fTreeViewer
.removeSelectionChangedListener(listenerWrapper
);
639 fTimeGraphViewer
.removeSelectionListener(listenerWrapper
);
643 * Sets the current selection for this time graph combo.
645 * @param selection the new selection
647 public void setSelection(ITimeGraphEntry selection
) {
648 fTimeGraphViewer
.setSelection(selection
);
649 fInhibitTreeSelection
= true; // block the tree selection changed listener
650 if (selection
!= null) {
651 StructuredSelection structuredSelection
= new StructuredSelection(selection
);
652 fTreeViewer
.setSelection(structuredSelection
);
654 fTreeViewer
.setSelection(new StructuredSelection());
656 fInhibitTreeSelection
= false;
657 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(fTreeViewer
.getTree());
658 if (treeItems
.size() == 0) {
661 TreeItem treeItem
= treeItems
.get(fTimeGraphViewer
.getTopIndex());
662 fTreeViewer
.getTree().setTopItem(treeItem
);
665 // ------------------------------------------------------------------------
667 // ------------------------------------------------------------------------
669 private ArrayList
<TreeItem
> getVisibleExpandedItems(Tree tree
) {
670 ArrayList
<TreeItem
> items
= new ArrayList
<TreeItem
>();
671 for (TreeItem item
: tree
.getItems()) {
672 if (item
.getData() == FILLER
) {
676 if (item
.getExpanded()) {
677 items
.addAll(getVisibleExpandedItems(item
));
683 private ArrayList
<TreeItem
> getVisibleExpandedItems(TreeItem treeItem
) {
684 ArrayList
<TreeItem
> items
= new ArrayList
<TreeItem
>();
685 for (TreeItem item
: treeItem
.getItems()) {
687 if (item
.getExpanded()) {
688 items
.addAll(getVisibleExpandedItems(item
));
694 private int getItemHeight(final Tree tree
) {
696 * Bug in Linux. The method getItemHeight doesn't always return the correct value.
698 if (fLinuxItemHeight
>= 0 && System
.getProperty("os.name").contains("Linux")) { //$NON-NLS-1$ //$NON-NLS-2$
699 if (fLinuxItemHeight
!= 0) {
700 return fLinuxItemHeight
;
702 ArrayList
<TreeItem
> treeItems
= getVisibleExpandedItems(tree
);
703 if (treeItems
.size() > 1) {
704 final TreeItem treeItem0
= treeItems
.get(0);
705 final TreeItem treeItem1
= treeItems
.get(1);
706 PaintListener paintListener
= new PaintListener() {
708 public void paintControl(PaintEvent e
) {
709 tree
.removePaintListener(this);
710 int y0
= treeItem0
.getBounds().y
;
711 int y1
= treeItem1
.getBounds().y
;
712 int itemHeight
= y1
- y0
;
713 if (itemHeight
> 0) {
714 fLinuxItemHeight
= itemHeight
;
715 fTimeGraphViewer
.setItemHeight(itemHeight
);
719 tree
.addPaintListener(paintListener
);
722 fLinuxItemHeight
= -1; // Not Linux, don't perform os.name check anymore
724 return tree
.getItemHeight();