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/*
* Copyright (c) 2022, 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 8016524
* @requires (os.family=="mac")
* @key headful
* @summary Tests whether the bottom line of JTableHeader border is visible for MacOS default LAF
* @run main JTHeaderBorderTest
*/
import java.awt.Graphics2D;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import static java.awt.image.BufferedImage.TYPE_INT_ARGB;
public class JTHeaderBorderTest {
private static JFrame frame;
private static JTable table;
private static JScrollPane scrollableTable;
private static final int FRAME_HT = 300;
private static final int FRAME_WT = 300;
private static final int TABLE_COLS = 3;
private static final int TABLE_ROWS = 2;
private static final int Y_OFFSET_START = 30;
private static final int Y_OFFSET_END = 55;
private static final int X_OFFSET = 25;
public static void main(String[] args) throws Exception {
try {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException e) {
throw new RuntimeException("Unsupported Look&Feel Class");
}
SwingUtilities.invokeAndWait(() -> {
table = new JTable(TABLE_ROWS, TABLE_COLS);
scrollableTable = new JScrollPane(table);
frame = new JFrame();
frame.getContentPane().add(scrollableTable);
frame.setSize(FRAME_WT, FRAME_HT);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// paint JFrame to BufferedImage
BufferedImage image = new BufferedImage(FRAME_WT, FRAME_HT, TYPE_INT_ARGB);
Graphics2D graphics2D = image.createGraphics();
frame.paint(graphics2D);
graphics2D.dispose();
int tableColor = table.getBackground().getRGB();
int headerColor = table.getTableHeader().getBackground().getRGB();
//at start pixelColor initialized to table header background color
int pixelColor = headerColor;
boolean isBottomLineVisible = false;
// scan table header region to check if bottom border of JTableHeader is visible
for (int y = Y_OFFSET_START; y <= Y_OFFSET_END; y++) {
pixelColor = image.getRGB(X_OFFSET, y);
System.out.println("Y offset: "+ y + " Color: "+ (Integer.toHexString(image.getRGB(X_OFFSET, y))));
if (pixelColor != tableColor || pixelColor != headerColor) {
isBottomLineVisible = true;
break;
}
}
// throw Runtime Exception if border is not visible in the scanned region
if (!isBottomLineVisible) {
saveImage(image, "JTableHeader.png");
throw new RuntimeException("JTableHeader Bottom Border not visible");
}
});
} finally {
if (frame != null) {
SwingUtilities.invokeAndWait(()-> frame.dispose());
}
}
}
// to save the BufferedImage as .png in the event the test fails (for debugging purpose)
private static void saveImage(BufferedImage image, String filename) {
try {
ImageIO.write(image, "png", new File(filename));
} catch (IOException e) {
e.printStackTrace();
}
}
}
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