/*

 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package javax.swing.event;

import java.util.EventListener;

/**

  * The listener that's notified when a tree expands or collapses

  * a node.

  * For further documentation and examples see

  * <a

  href="https://docs.oracle.com/javase/tutorial/uiswing/events/treeexpansionlistener.html">How to Write a Tree Expansion Listener</a>,

  * a section in <em>The Java Tutorial.</em>

  *

  * @author Scott Violet

  */

public interface TreeExpansionListener extends EventListener

{

    /**

      * Called whenever an item in the tree has been expanded.

      */

    public void treeExpanded(TreeExpansionEvent event);

    /**

      * Called whenever an item in the tree has been collapsed.

      */

    public void treeCollapsed(TreeExpansionEvent event);

}