1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @key headful 27 * @bug 8004298 28 * @summary NPE in WindowsTreeUI.ensureRowsAreVisible 29 * @author Alexander Scherbatiy 30 * @library ../../regtesthelpers 31 * @modules java.desktop/com.sun.java.swing.plaf.windows 32 * @build Util 33 * @run main bug8004298 34 */ 35 36 import java.awt.*; 37 import java.awt.event.InputEvent; 38 import javax.swing.*; 39 import javax.swing.tree.*; 40 import java.util.concurrent.Callable; 41 import com.sun.java.swing.plaf.windows.WindowsLookAndFeel; 42 import com.sun.java.swing.plaf.windows.WindowsTreeUI; 43 44 public class bug8004298 { 45 46 private static JTree tree; 47 48 public static void main(String[] args) throws Exception { 49 Robot robot = new Robot(); 50 robot.setAutoDelay(50); 51 try { 52 UIManager.setLookAndFeel(new WindowsLookAndFeel()); 53 } catch (javax.swing.UnsupportedLookAndFeelException ulafe) { 54 System.out.println(ulafe.getMessage()); 55 System.out.println("The test is considered PASSED"); 56 return; 57 } 58 SwingUtilities.invokeAndWait(new Runnable() { 59 60 @Override 61 public void run() { 62 createAndShowGUI(); 63 } 64 }); 65 66 robot.waitForIdle(); 67 68 Point point = Util.invokeOnEDT(new Callable<Point>() { 69 70 @Override 71 public Point call() throws Exception { 72 Rectangle rect = tree.getRowBounds(2); 73 Point p = new Point(rect.x + rect.width / 2, rect.y + rect.height / 2); 74 SwingUtilities.convertPointToScreen(p, tree); 75 return p; 76 } 77 }); 78 79 robot.mouseMove(point.x, point.y); 80 robot.mousePress(InputEvent.BUTTON1_MASK); 81 robot.mouseRelease(InputEvent.BUTTON1_MASK); 82 robot.mousePress(InputEvent.BUTTON1_MASK); 83 robot.mouseRelease(InputEvent.BUTTON1_MASK); 84 robot.waitForIdle(); 85 86 } 87 88 private static void createAndShowGUI() { 89 JFrame frame = new JFrame(); 90 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 91 92 DefaultMutableTreeNode root = new DefaultMutableTreeNode("root"); 93 root.add(new DefaultMutableTreeNode("colors")); 94 DefaultMutableTreeNode sports = new DefaultMutableTreeNode("sports"); 95 sports.add(new DefaultMutableTreeNode("basketball")); 96 sports.add(new DefaultMutableTreeNode("football")); 97 root.add(sports); 98 99 tree = new JTree(root); 100 tree.setUI(new NullReturningTreeUI()); 101 102 frame.getContentPane().add(tree); 103 frame.pack(); 104 frame.setVisible(true); 105 106 } 107 108 private static final class NullReturningTreeUI extends WindowsTreeUI { 109 110 @Override 111 public Rectangle getPathBounds(JTree tree, TreePath path) { 112 // the method can return null and callers have to be ready for 113 // that. Simulate the case by returning null for unknown reason. 114 if (path != null && path.toString().contains("football")) { 115 return null; 116 } 117 118 return super.getPathBounds(tree, path); 119 } 120 } 121 }