| /* |
| * Copyright (c) 2016, 2017, 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 |
| * @key headful |
| * @bug 8160246 |
| * @summary Regression: 4410243 reproducible with GTK LaF |
| * @run main ScrollFlickerTest |
| */ |
| |
| import javax.swing.*; |
| import java.awt.*; |
| |
| public class ScrollFlickerTest { |
| |
| private static JFrame frame; |
| private static JScrollPane scroll; |
| private static int cnt = 0; |
| |
| public static void main(String[] args) throws Exception { |
| SwingUtilities.invokeAndWait(() -> { |
| frame = new JFrame(); |
| frame.setSize(300, 200); |
| frame.getContentPane().setLayout(null); |
| JTextArea text = new JTextArea("Test test test test"); |
| text.setLineWrap(true); |
| scroll = new JScrollPane(text); |
| frame.getContentPane().add(scroll); |
| scroll.setBounds(1, 1, 100, 50); |
| frame.setVisible(true); |
| }); |
| |
| Robot robot = new Robot(); |
| robot.waitForIdle(); |
| robot.delay(200); |
| |
| SwingUtilities.invokeAndWait(() -> { |
| Insets insets = scroll.getInsets(); |
| scroll.setSize(insets.left + insets.right + |
| scroll.getVerticalScrollBar().getPreferredSize().width, 50); |
| scroll.revalidate(); |
| }); |
| robot.delay(200); |
| SwingUtilities.invokeAndWait(() -> |
| scroll.getViewport().addChangeListener((e) -> cnt++)); |
| robot.delay(1000); |
| |
| SwingUtilities.invokeLater(frame::dispose); |
| |
| if (cnt > 0) { |
| throw new RuntimeException("Scroll bar flickers"); |
| } |
| } |
| } |