| /* |
| * Copyright (c) 1998, 2014, 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| 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://docs.oracle.com/javase/tutorial/uiswing/events/treewillexpandlistener.html">How to Write a Tree-Will-Expand Listener</a>, |
| * a section in <em>The Java Tutorial.</em> |
| * |
| * @author Scott Violet |
| */ |
| |
| public interface TreeWillExpandListener extends EventListener { |
| /** |
| * Invoked whenever a node in the tree is about to be expanded. |
| * |
| * @param event a {@code TreeExpansionEvent} containing a {@code TreePath} |
| * object for the node |
| * @throws ExpandVetoException to signify expansion has been canceled |
| */ |
| public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException; |
| |
| /** |
| * Invoked whenever a node in the tree is about to be collapsed. |
| * |
| * @param event a {@code TreeExpansionEvent} containing a {@code TreePath} |
| * object for the node |
| * @throws ExpandVetoException to signify collapse has been canceled |
| */ |
| public void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException; |
| } |