82 lines
2.5 KiB
Java
82 lines
2.5 KiB
Java
/*
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* Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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@bug 4276920
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@summary Tests that BasicComboPopup.hide() doesn't cause unnecessary repaints
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@key headful
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*/
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import javax.swing.JComboBox;
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import javax.swing.JFrame;
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import javax.swing.SwingUtilities;
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public class bug4276920 {
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static volatile TestComboBox combo;
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static volatile JFrame frame;
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public static void main(String[] args) throws Exception {
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try {
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SwingUtilities.invokeAndWait(bug4276920::createUI);
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Thread.sleep(2000);
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int before = combo.getRepaintCount();
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SwingUtilities.invokeAndWait(combo::hidePopup);
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int after = combo.getRepaintCount();
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if (after > before) {
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throw new Error("Failed 4276920: BasicComboPopup.hide() caused unnecessary repaint()");
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}
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} finally {
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if (frame != null) {
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SwingUtilities.invokeAndWait(frame::dispose);
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}
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}
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}
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static void createUI() {
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combo = new TestComboBox(new String[] {"Why am I so slow?"});
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frame = new JFrame("bug4276920");
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frame.getContentPane().add(combo);
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frame.pack();
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frame.validate();
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frame.setVisible(true);
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}
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static class TestComboBox extends JComboBox {
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int count = 0;
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TestComboBox(Object[] content) {
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super(content);
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}
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public void repaint() {
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super.repaint();
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count++;
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}
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int getRepaintCount() {
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return count;
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}
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}
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}
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