4568N/A/*
4568N/A * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
4568N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4568N/A *
4568N/A * This code is free software; you can redistribute it and/or modify it
4568N/A * under the terms of the GNU General Public License version 2 only, as
4568N/A * published by the Free Software Foundation.
4568N/A *
4568N/A * This code is distributed in the hope that it will be useful, but WITHOUT
4568N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4568N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
4568N/A * version 2 for more details (a copy is included in the LICENSE file that
4568N/A * accompanied this code).
4568N/A *
4568N/A * You should have received a copy of the GNU General Public License version
4568N/A * 2 along with this work; if not, write to the Free Software Foundation,
4568N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
4568N/A *
4568N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
4568N/A * or visit www.oracle.com if you need additional information or have any
4568N/A * questions.
4568N/A */
4568N/A
4568N/A/*
4568N/A * @test
4568N/A * @bug 6505523
4568N/A * @summary NullPointerException in BasicTreeUI when a node is removed by expansion listener
4568N/A * @author Alexandr Scherbatiy
4568N/A * @run main bug6505523
4568N/A */
4568N/Aimport java.awt.Point;
4568N/Aimport java.awt.Rectangle;
4568N/Aimport java.awt.Robot;
4568N/Aimport java.awt.Toolkit;
4568N/Aimport java.awt.event.InputEvent;
4568N/Aimport javax.swing.JFrame;
4568N/Aimport javax.swing.JScrollPane;
4568N/Aimport javax.swing.JTree;
4568N/Aimport javax.swing.SwingUtilities;
4568N/Aimport javax.swing.event.TreeExpansionEvent;
4568N/Aimport javax.swing.event.TreeExpansionListener;
4568N/Aimport javax.swing.tree.DefaultMutableTreeNode;
4568N/Aimport javax.swing.tree.DefaultTreeModel;
4568N/Aimport javax.swing.tree.TreeNode;
4568N/Aimport sun.awt.SunToolkit;
4568N/A
4568N/Apublic class bug6505523 {
4568N/A
4568N/A private static JTree tree;
4568N/A
4568N/A public static void main(String[] args) throws Exception {
4568N/A SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
4568N/A Robot robot = new Robot();
4568N/A robot.setAutoDelay(50);
4568N/A
4568N/A SwingUtilities.invokeAndWait(new Runnable() {
4568N/A
4568N/A @Override
4568N/A public void run() {
4568N/A createAndShowGUI();
4568N/A }
4568N/A });
4568N/A
4568N/A toolkit.realSync();
4568N/A
4568N/A Point point = getRowPointToClick(2);
4568N/A robot.mouseMove(point.x, point.y);
4568N/A robot.mousePress(InputEvent.BUTTON1_MASK);
4568N/A robot.mouseRelease(InputEvent.BUTTON1_MASK);
4568N/A
4568N/A toolkit.realSync();
4568N/A
4568N/A }
4568N/A
4568N/A private static Point getRowPointToClick(final int row) throws Exception {
4568N/A
4568N/A final Point[] result = new Point[1];
4568N/A
4568N/A SwingUtilities.invokeAndWait(new Runnable() {
4568N/A
4568N/A @Override
4568N/A public void run() {
4568N/A Rectangle rect = tree.getRowBounds(row);
4568N/A Point point = new Point(rect.x - 5, rect.y + rect.height / 2);
4568N/A SwingUtilities.convertPointToScreen(point, tree);
4568N/A result[0] = point;
4568N/A }
4568N/A });
4568N/A
4568N/A return result[0];
4568N/A }
4568N/A
4568N/A private static void createAndShowGUI() {
4568N/A final DefaultMutableTreeNode root = new DefaultMutableTreeNode("Problem with NPE under JDK 1.6");
4568N/A final DefaultMutableTreeNode problematic = new DefaultMutableTreeNode("Expand me and behold a NPE in stderr");
4568N/A problematic.add(new DefaultMutableTreeNode("some content"));
4568N/A root.add(new DefaultMutableTreeNode("irrelevant..."));
4568N/A root.add(problematic);
4568N/A
4568N/A final DefaultTreeModel model = new DefaultTreeModel(root);
4568N/A tree = new JTree(model);
4568N/A tree.setRootVisible(true);
4568N/A tree.setShowsRootHandles(true);
4568N/A tree.expandRow(0);
4568N/A tree.collapseRow(2);
4568N/A
4568N/A // this is critical - without dragEnabled everything works
4568N/A tree.setDragEnabled(true);
4568N/A
4568N/A tree.addTreeExpansionListener(new TreeExpansionListener() {
4568N/A
4568N/A @Override
4568N/A public void treeExpanded(TreeExpansionEvent event) {
4568N/A TreeNode parent = problematic.getParent();
4568N/A if (parent instanceof DefaultMutableTreeNode) {
4568N/A model.removeNodeFromParent(problematic);
4568N/A }
4568N/A }
4568N/A
4568N/A @Override
4568N/A public void treeCollapsed(TreeExpansionEvent event) {
4568N/A }
4568N/A });
4568N/A
4568N/A JFrame frame = new JFrame("JTree Problem");
4568N/A frame.add(new JScrollPane(tree));
4568N/A frame.setSize(500, 300);
4568N/A frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
4568N/A frame.setLocationRelativeTo(null);
4568N/A frame.setVisible(true);
4568N/A }
4568N/A}