Bug 161805 [Viewers] JFace TreeViewer collapses node when sibbling removed
3.2 1. Use the Eclipse Wizard to produce a plugin with a tree viewer view. 2. Paste the modified SampleView.java - this looks like the left part of the attached screenshot 3. Click on the top node Parent1 and type - 4. TreeViewer.remove is called to remove Parent 1. TreeViewer.refresh is called - this looks like the right part of the attached screenshot Wrong: node Parent 4 is now collapsed. Expectation Parent 4 is still expanded. Is there any workaround? Am I misusing your API? Note. The snippet is almost identical to the code generated by PDE for plugin / view / Tree Viewer. Here is the extra code in createPartControl: viewer.getTree().addKeyListener(new KeyListener() { public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } public void keyPressed(KeyEvent e) { if (e.character == '-') { TreeParent parent = (TreeParent) ((IStructuredSelection)viewer.getSelection()).toArray()[0]; parent.getParent().removeChild(parent); viewer.refresh(); } if (e.character == '+') { TreeParent parent = (TreeParent) ((IStructuredSelection)viewer.getSelection()).toArray()[0]; parent.addChild(new TreeParent(new Date().toString())); } } });
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
newItem(ti, SWT.NULL, -1);
				}
				return;
			}
		}
		if (childElements.length > 0) {
			
			Object[] filtered = filter(parentElementOrTreePath, childElements);
			ViewerComparator comparator = getComparator();
			if (comparator != null) {
				if (comparator instanceof TreePathViewerSorter) {
					TreePathViewerSorter tpvs = (TreePathViewerSorter) comparator;
					if (path == null) {
						path = internalGetSorterParentPath(widget, comparator);
					}
					tpvs.sort(this, path, filtered);
				} else {
					comparator.sort(this, filtered);
				}
			}
			createAddedElements(widget, filtered);
		}
	}
	/**
	 * Filter the children elements.
	 * 
	 * @param parentElementOrTreePath
	 *            the parent element or path
	 * @param elements
	 *            the child elements