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
} else {
				selection = getSelection();
				updateSelection(selection);
			}
			fireDoubleClick(new DoubleClickEvent(this, selection));
		}
	}
	/**
	 * Handles a tree collapse event from the SWT widget.
	 * 
	 * @param event
	 *            the SWT tree event
	 */
	protected void handleTreeCollapse(TreeEvent event) {
		if (event.item.getData() != null) {
			fireTreeCollapsed(new TreeExpansionEvent(this, event.item.getData()));
		}
	}
	/**
	 * Handles a tree expand event from the SWT widget.
	 * 
	 * @param event
	 *            the SWT tree event
	 */
	protected void handleTreeExpand(TreeEvent event) {
		createChildren(event.item);
		if (event.item.getData() != null) {
			fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
		}
	}