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 * @bug 8004298 27 * @summary NPE in WindowsTreeUI.ensureRowsAreVisible 28 * @author Alexander Scherbatiy 29 * @library ../../regtesthelpers 30 * @modules java.desktop/com.sun.java.swing.plaf.windows 31 * @build Util 32 * @run main bug8004298 33 */ 34 35 import java.awt.*; 36 import java.awt.event.InputEvent; 37 import javax.swing.*; 38 import javax.swing.tree.*; 39 import java.util.concurrent.Callable; 40 import com.sun.java.swing.plaf.windows.WindowsLookAndFeel; 41 import com.sun.java.swing.plaf.windows.WindowsTreeUI; 42 43 public class bug8004298 { 44 45 private static JTree tree; 46 47 public static void main(String[] args) throws Exception { 48 Robot robot = new Robot(); 49 robot.setAutoDelay(50); 50 try { 51 UIManager.setLookAndFeel(new WindowsLookAndFeel()); 52 } catch (javax.swing.UnsupportedLookAndFeelException ulafe) { 53 System.out.println(ulafe.getMessage()); 54 System.out.println("The test is considered PASSED"); 55 return; 56 } 57 SwingUtilities.invokeAndWait(new Runnable() { 58 59 @Override 60 public void run() { 61 createAndShowGUI(); 62 } 63 }); 64 65 robot.waitForIdle(); 66 67 Point point = Util.invokeOnEDT(new Callable<Point>() { 68 69 @Override 70 public Point call() throws Exception { 71 Rectangle rect = tree.getRowBounds(2); 72 Point p = new Point(rect.x + rect.width / 2, rect.y + rect.height / 2); 73 SwingUtilities.convertPointToScreen(p, tree); 74 return p; 75 } 76 }); 77 78 robot.mouseMove(point.x, point.y); 79 robot.mousePress(InputEvent.BUTTON1_MASK); 80 robot.mouseRelease(InputEvent.BUTTON1_MASK); 81 robot.mousePress(InputEvent.BUTTON1_MASK); 82 robot.mouseRelease(InputEvent.BUTTON1_MASK); 83 robot.waitForIdle(); 84 85 } 86 87 private static void createAndShowGUI() { 88 JFrame frame = new JFrame(); 89 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 90 91 DefaultMutableTreeNode root = new DefaultMutableTreeNode("root"); 92 root.add(new DefaultMutableTreeNode("colors")); 93 DefaultMutableTreeNode sports = new DefaultMutableTreeNode("sports"); 94 sports.add(new DefaultMutableTreeNode("basketball")); 95 sports.add(new DefaultMutableTreeNode("football")); 96 root.add(sports); 97 98 tree = new JTree(root); 99 tree.setUI(new NullReturningTreeUI()); 100 101 frame.getContentPane().add(tree); 102 frame.pack(); 103 frame.setVisible(true); 104 105 } 106 107 private static final class NullReturningTreeUI extends WindowsTreeUI { 108 109 @Override 110 public Rectangle getPathBounds(JTree tree, TreePath path) { 111 // the method can return null and callers have to be ready for 112 // that. Simulate the case by returning null for unknown reason. 113 if (path != null && path.toString().contains("football")) { 114 return null; 115 } 116 117 return super.getPathBounds(tree, path); 118 } 119 } 120 }