/*
* @(#)TreeWillExpandListener.java 1.10 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing.event;
import java.util.EventListener;
import javax.swing.tree.ExpandVetoException;
/**
* The listener that's notified when a tree expands or collapses
* a node.
* For further information and examples see
* <a href="http://java.sun.com/docs/books/tutorial/uiswing/events/treewillexpandlistener.html">How to Write a Tree-Will-Expand Listener</a>,
* a section in <em>The Java Tutorial.</em>
*
* @version 1.10 11/17/05
* @author Scott Violet
*/
public interface TreeWillExpandListener extends EventListener {
/**
* Invoked whenever a node in the tree is about to be expanded.
*/
public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException;
/**
* Invoked whenever a node in the tree is about to be collapsed.
*/
public void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException;
}