1 /* 2 * Copyright (c) 2013, 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 * @build Util 31 * @run main bug8004298 32 */ 33 34 import java.awt.*; 35 import java.awt.event.InputEvent; 36 import javax.swing.*; 37 import javax.swing.tree.*; 38 import java.util.concurrent.Callable; 39 import com.sun.java.swing.plaf.windows.WindowsLookAndFeel; 40 import com.sun.java.swing.plaf.windows.WindowsTreeUI; 41 42 public class bug8004298 { 43 44 private static JTree tree; 45 46 public static void main(String[] args) throws Exception { 47 Robot robot = new Robot(); 48 robot.setAutoDelay(50); 49 try { 50 UIManager.setLookAndFeel(new WindowsLookAndFeel()); 51 } catch (javax.swing.UnsupportedLookAndFeelException ulafe) { 52 System.out.println(ulafe.getMessage()); 53 System.out.println("The test is considered PASSED"); 54 return; 55 } 56 SwingUtilities.invokeAndWait(new Runnable() { 57 58 @Override 59 public void run() { 60 createAndShowGUI(); 61 } 62 }); 63 64 robot.waitForIdle(); 65 66 Point point = Util.invokeOnEDT(new Callable<Point>() { 67 68 @Override 69 public Point call() throws Exception { 70 Rectangle rect = tree.getRowBounds(2); 71 Point p = new Point(rect.x + rect.width / 2, rect.y + rect.height / 2); 72 SwingUtilities.convertPointToScreen(p, tree); 73 return p; 74 } 75 }); 76 77 robot.mouseMove(point.x, point.y); 78 robot.mousePress(InputEvent.BUTTON1_MASK); 79 robot.mouseRelease(InputEvent.BUTTON1_MASK); 80 robot.mousePress(InputEvent.BUTTON1_MASK); 81 robot.mouseRelease(InputEvent.BUTTON1_MASK); 82 robot.waitForIdle(); 83 84 } 85 86 private static void createAndShowGUI() { 87 JFrame frame = new JFrame(); 88 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 89 90 DefaultMutableTreeNode root = new DefaultMutableTreeNode("root"); 91 root.add(new DefaultMutableTreeNode("colors")); 92 DefaultMutableTreeNode sports = new DefaultMutableTreeNode("sports"); 93 sports.add(new DefaultMutableTreeNode("basketball")); 94 sports.add(new DefaultMutableTreeNode("football")); 95 root.add(sports); 96 97 tree = new JTree(root); 98 tree.setUI(new NullReturningTreeUI()); 99 100 frame.getContentPane().add(tree); 101 frame.pack(); 102 frame.setVisible(true); 103 104 } 105 106 private static final class NullReturningTreeUI extends WindowsTreeUI { 107 108 @Override 109 public Rectangle getPathBounds(JTree tree, TreePath path) { 110 // the method can return null and callers have to be ready for 111 // that. Simulate the case by returning null for unknown reason. 112 if (path != null && path.toString().contains("football")) { 113 return null; 114 } 115 116 return super.getPathBounds(tree, path); 117 } 118 } 119 }