Bug 167323 [Viewers]Open AbstractTreeViewer for external widget implementors
As reported by Ross Camara AbstractTreeViewer would work for nebula if we would open the API a bit. Boris and I decided that we will do this in 2 steps: 1. open the API 2. moving the Virtual-Support bits from TreeViewer to AbstractTreeViewer when the nebula grid provides virtual support.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
}
					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
	 *            the parent widget
	 * @param element
	 *            the element
	 * @param index
	 *            if non-negative, indicates the position to insert the item
	 *            into its parent
	 */
	protected void createTreeItem(Widget parent, Object element, int index) {
		Item item = newItem(parent, SWT.NULL, index);
		updateItem(item, element);
		updatePlus(item, element);
	}
	/**
	 * The <code>AbstractTreeViewer</code> implementation of this method also
	 * recurses over children of the corresponding element.
	 */
	protected void disassociate(Item item) {