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/*
* Copyright (c) 1999, 2025, 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 4244899
* @summary Tests whether scrolling with blit has artifacts
* @library /java/awt/regtesthelpers
* @build PassFailJFrame
* @run main/manual bug4244899
*/
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class bug4244899 {
static final String INSTRUCTIONS = """
Widen the first column of the table, so that
you get a horizontal scrollbar. Click in the
scrollbar (not on the thumb, but in the track).
If you notice some artifacts/flashing at
the bottom of the frame, the test FAILS.
Otherwise, the test PASSES.
""";
public static void main(String[] args) throws Exception {
PassFailJFrame.builder()
.title("bug4244899 Test Instructions")
.instructions(INSTRUCTIONS)
.columns(40)
.testUI(bug4244899::createUI)
.build()
.awaitAndCheck();
}
static class TestModel extends AbstractTableModel {
private final int rows = 20;
private final int cols = 5;
private Integer[][] data;
public TestModel() {
data = new Integer[rows][];
int realCount = 0;
for (int counter = 0; counter < rows; counter++) {
data[counter] = new Integer[cols];
for (int y = 0; y < cols; y++) {
data[counter][y] = Integer.valueOf(realCount);
realCount = (realCount + 1) % 23;
}
}
}
public int getRowCount() {
return data.length;
}
public int getColumnCount() {
return data[0].length;
}
public Object getValueAt(int row, int column) {
return data[row][column];
}
}
static JFrame createUI() {
JFrame f = new JFrame("Scrolling Blit Artifact Test");
JTable table = new JTable(new TestModel());
JScrollPane sp = new JScrollPane(table);
sp.getViewport().putClientProperty("EnableWindowBlit", Boolean.TRUE);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
f.add(sp);
f.setSize(400, 400);
return f;
}
}
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