russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
86 lines
3.2 KiB
Java
86 lines
3.2 KiB
Java
/*
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* Copyright (c) 2025, 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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/*
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* @test
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* @bug 8364146
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* @key headful
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* @summary Verifies JList getScrollableUnitIncrement return non-negative number
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* @run main JListTest
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*/
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import java.awt.Dimension;
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import java.awt.Rectangle;
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import javax.swing.JFrame;
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import javax.swing.JList;
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import javax.swing.JScrollPane;
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import javax.swing.SwingConstants;
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import javax.swing.SwingUtilities;
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public class JListTest {
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private static JFrame f;
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public static void main(String[] argv) throws Exception {
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SwingUtilities.invokeAndWait(() -> {
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try {
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f = new JFrame();
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String[] data = {"One", "Two", "Three", "Four", "Five", "Six ",
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"Seven", "Eight", "Nine", "Ten", "Eleven", "Twelv"};
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JList<String> list = new JList<>(data);
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list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
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JScrollPane sp = new JScrollPane(list);
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sp.setPreferredSize(new Dimension(200, 200));
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f.add(sp);
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f.pack();
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f.setVisible(true);
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Rectangle cell = list.getCellBounds(1, data.length);
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System.out.println(cell);
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cell.y = list.getHeight() + 10;
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int unit = list.getScrollableUnitIncrement(
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cell,
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SwingConstants.VERTICAL,
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-1);
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System.out.println("Scrollable unit increment: " + unit);
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if (unit < 0) {
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throw new RuntimeException("JList scrollable unit increment should be greater than 0.");
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}
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unit = list.getScrollableUnitIncrement(
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cell,
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SwingConstants.VERTICAL,
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1);
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System.out.println("Scrollable unit increment: " + unit);
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if (unit < 0) {
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throw new RuntimeException("JList scrollable unit increment should be greater than 0.");
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}
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} finally {
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if (f != null) {
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f.dispose();
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}
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}
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});
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}
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}
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