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
removeAll = true;
			addDummy = needsPlus;
			
			setExpanded(item, false);
		}
		if (removeAll) {
			
			Item[] items = getItems(item);
			for (int i = 0; i < items.length; i++) {
				if (items[i].getData() != null) {
					disassociate(items[i]);
				}
				items[i].dispose();
			}
		}
		if (addDummy) {
			newItem(item, SWT.NULL, -1); 
		}
	}
	/**
	 * Gets the expanded elements that are visible to the user. An expanded
	 * element is only visible if the parent is expanded.
	 * 
	 * @return the visible expanded elements
	 * @since 2.0
	 */
	public Object[] getVisibleExpandedElements() {
		ArrayList v = new ArrayList();
		internalCollectVisibleExpanded(v, getControl());
		return v.toArray();