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
*/
protected void internalCollapseToLevel(Widget widget, int level) {
	if (level == ALL_LEVELS || level > 0) {
		if (widget instanceof Item)
			setExpanded((Item) widget, false);
		if (level == ALL_LEVELS || level > 1) {
			Item[] children = getChildren(widget);
			if (children != null) {
				int nextLevel = (level == ALL_LEVELS ? ALL_LEVELS : level - 1);
				for (int i = 0; i < children.length; i++)
					internalCollapseToLevel(children[i], nextLevel);
			}
		}
	}
}
/**
 * Recursively collects all expanded elements from the given widget.
 *
 * @param result a list (element type: <code>Object</code>) into which
 *    to collect the elements
 * @param widget the widget
 */
private void internalCollectExpanded(List result, Widget widget) {
	Item[] items = getChildren(widget);
	for (int i = 0; i < items.length; i++) {
		Item item = items[i];
		if (getExpanded(item)) {
			Object data = item.getData();
			if (data != null)
				result.add(data);