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
if (tis[i].getData() != null) {
							disassociate(tis[i]);
							Assert.isTrue(tis[i].getData() == null,
									"Second or later child is non -null");
						}
						tis[i].dispose();
					}
				}
				Object d = widget.getData();
				if (d != null) {
					Object parentElement = d;
					Object[] children;
					if (isTreePathContentProvider() && widget instanceof Item) {
						TreePath path = getTreePathFromItem((Item) widget);
						children = getSortedChildren(path);
					} else {
						children = getSortedChildren(parentElement);
					}
					for (int i = 0; i < children.length; i++) {
						createTreeItem(widget, children[i], -1);
					}
				}
			}
		});
	}
	/**
	 * Creates a single item for the given parent and synchronizes it with the
	 * given element.
	 * 
	 * @param parent