TreeListener.java

/*******************************************************************************
 * Copyright (c) 2000, 2005, 2012 IBM Corporation, Gerhardt Informatics Kft. and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Gerhardt Informatics Kft. - GEFGWT port
 *******************************************************************************/
package org.eclipse.swt.events;

/**
 * Classes which implement this interface provide methods that deal with the
 * expanding and collapsing of tree branches.
 * <p>
 * After creating an instance of a class that implements this interface it can
 * be added to a tree control using the <code>addTreeListener</code> method and
 * removed using the <code>removeTreeListener</code> method. When a branch of
 * the tree is expanded or collapsed, the appropriate method will be invoked.
 * </p>
 * 
 * @see TreeAdapter
 * @see TreeEvent
 */
public interface TreeListener extends SWTEventListener {

	/**
	 * Sent when a tree branch is collapsed.
	 * 
	 * @param e
	 *            an event containing information about the tree operation
	 */
	public void treeCollapsed(TreeEvent e);

	/**
	 * Sent when a tree branch is expanded.
	 * 
	 * @param e
	 *            an event containing information about the tree operation
	 */
	public void treeExpanded(TreeEvent e);
}