Bug 24024 [Viewers] Error in Javadoc for AbstractTreeViewer::setAutoExpandLevel()
from Javadoc for AbstractTreeViewer::setAutoExpandLevel() : * Sets the auto-expand level. * The value 0 means that the root's children are not visible; * 1 means that the root is expanded so that its children are visible, * but the root's grandchildren are not; and so on. That's off by one. 0 means auto-expand is off. 1 means that roots are not expanded. 2 means that children of the roots are expanded, but not grandchildren; etc. * The value <code>EXPAND_ALL</code> means that all subtrees should be * expanded. The constant should read ALL_LEVELS Note that some other expansion-methods need these comment updates too.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
*/
private Item rightMostVisibleDescendent(Item item) {
	Item[] children = getItems(item);
	if (getExpanded(item) && children != null && children.length > 0) {
		return rightMostVisibleDescendent(children[children.length-1]);
	} else {
		return item;
	}
}
/* (non-Javadoc)
 * Method declared on Viewer.
 */
public Item scrollDown(int x, int y) {
	Item current = getItem(x, y);
	if (current != null) {
		Item next = getNextItem(current, true);
		showItem(next == null ? current : next);
		return next;
	}
	return null;
}
/* (non-Javadoc)
 * Method declared on Viewer.
 */
public Item scrollUp(int x, int y) {
	Item current = getItem(x, y);
	if (current != null) {
		Item previous = getPreviousItem(current);
		showItem(previous == null ? current : previous);
		return previous;