Bug 270457 [Viewers] [regression] CheckBoxTreeViewer clears check state after collapseAll
Hi there :) In my RCP I've a CheckBoxTreeViewer that looses check states for invisible items. Turns out if a disable the collapseAll() call things go back to normal. So, in a tree like this: [x] root [x] sub a collapseAll expandAll will create this: [x] root [] sub Could still be my fault, feel free to have me try some workarounds or other tests that help you find the cause...
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
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()));
		}
	}
	
	protected void hookControl(Control control) {