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/*
* Copyright (c) 2003, 2023, 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
* @bug 4832765
* @summary JList vertical scrolling doesn't work properly.
* @run main bug4832765
*/
import java.awt.Dimension;
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
public class bug4832765 {
public static void main(String[] argv) throws Exception {
SwingUtilities.invokeAndWait(() -> {
String[] data = {"One", "Two", "Three", "Four",
"Five", "Six ", "Seven", "Eight",
"Nine", "Ten", "Eleven", "Twelv"};
JList<String> list = new JList<>(data);
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
JScrollPane jsp = new JScrollPane(list);
Rectangle rect = list.getCellBounds(5, 5);
Dimension d = new Dimension(200, rect.height);
jsp.setPreferredSize(d);
jsp.setMinimumSize(d);
list.scrollRectToVisible(rect);
int unit = list.getScrollableUnitIncrement(rect,
SwingConstants.VERTICAL,
-1);
if (unit <= 0) {
throw new RuntimeException("JList scrollable unit increment" +
" should be greate than 0.");
}
});
}
}
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