| /* |
| * Copyright (c) 2012, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 6505523 |
| * @summary NullPointerException in BasicTreeUI when a node is removed by expansion listener |
| * @author Alexandr Scherbatiy |
| * @run main bug6505523 |
| */ |
| import java.awt.Point; |
| import java.awt.Rectangle; |
| import java.awt.Robot; |
| import java.awt.Toolkit; |
| import java.awt.event.InputEvent; |
| import javax.swing.JFrame; |
| import javax.swing.JScrollPane; |
| import javax.swing.JTree; |
| import javax.swing.SwingUtilities; |
| import javax.swing.event.TreeExpansionEvent; |
| import javax.swing.event.TreeExpansionListener; |
| import javax.swing.tree.DefaultMutableTreeNode; |
| import javax.swing.tree.DefaultTreeModel; |
| import javax.swing.tree.TreeNode; |
| import sun.awt.SunToolkit; |
| |
| public class bug6505523 { |
| |
| private static JTree tree; |
| |
| public static void main(String[] args) throws Exception { |
| SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit(); |
| Robot robot = new Robot(); |
| robot.setAutoDelay(50); |
| |
| SwingUtilities.invokeAndWait(new Runnable() { |
| |
| @Override |
| public void run() { |
| createAndShowGUI(); |
| } |
| }); |
| |
| toolkit.realSync(); |
| |
| Point point = getRowPointToClick(2); |
| robot.mouseMove(point.x, point.y); |
| robot.mousePress(InputEvent.BUTTON1_MASK); |
| robot.mouseRelease(InputEvent.BUTTON1_MASK); |
| |
| toolkit.realSync(); |
| |
| } |
| |
| private static Point getRowPointToClick(final int row) throws Exception { |
| |
| final Point[] result = new Point[1]; |
| |
| SwingUtilities.invokeAndWait(new Runnable() { |
| |
| @Override |
| public void run() { |
| Rectangle rect = tree.getRowBounds(row); |
| Point point = new Point(rect.x - 5, rect.y + rect.height / 2); |
| SwingUtilities.convertPointToScreen(point, tree); |
| result[0] = point; |
| } |
| }); |
| |
| return result[0]; |
| } |
| |
| private static void createAndShowGUI() { |
| final DefaultMutableTreeNode root = new DefaultMutableTreeNode("Problem with NPE under JDK 1.6"); |
| final DefaultMutableTreeNode problematic = new DefaultMutableTreeNode("Expand me and behold a NPE in stderr"); |
| problematic.add(new DefaultMutableTreeNode("some content")); |
| root.add(new DefaultMutableTreeNode("irrelevant...")); |
| root.add(problematic); |
| |
| final DefaultTreeModel model = new DefaultTreeModel(root); |
| tree = new JTree(model); |
| tree.setRootVisible(true); |
| tree.setShowsRootHandles(true); |
| tree.expandRow(0); |
| tree.collapseRow(2); |
| |
| // this is critical - without dragEnabled everything works |
| tree.setDragEnabled(true); |
| |
| tree.addTreeExpansionListener(new TreeExpansionListener() { |
| |
| @Override |
| public void treeExpanded(TreeExpansionEvent event) { |
| TreeNode parent = problematic.getParent(); |
| if (parent instanceof DefaultMutableTreeNode) { |
| model.removeNodeFromParent(problematic); |
| } |
| } |
| |
| @Override |
| public void treeCollapsed(TreeExpansionEvent event) { |
| } |
| }); |
| |
| JFrame frame = new JFrame("JTree Problem"); |
| frame.add(new JScrollPane(tree)); |
| frame.setSize(500, 300); |
| frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); |
| frame.setLocationRelativeTo(null); |
| frame.setVisible(true); |
| } |
| } |