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
*/
	private void createAddedElements(Widget widget, Object[] elements) {
		if (elements.length == 1) {
			if (equals(elements[0], widget.getData())) {
				return;
			}
		}
		ViewerComparator comparator = getComparator();
		TreePath parentPath = internalGetSorterParentPath(widget, comparator);
		Item[] items = getChildren(widget);
		
		
		int lastInsertion = 0;
		
		if (items.length == 0) {
			for (int i = 0; i < elements.length; i++) {
				createTreeItem(widget, elements[i], -1);
			}
			return;
		}
		for (int i = 0; i < elements.length; i++) {
			boolean newItem = true;
			Object element = elements[i];
			int index;
			if (comparator == null) {
				if (itemExists(items, element)) {
					refresh(element);
					newItem = false;
				}
				index = -1;