1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 import java.awt.Color;

    24 import java.awt.Graphics2D;

    25 import java.awt.image.BufferedImage;

    26 import javax.swing.JTable;

    27 import javax.swing.SwingUtilities;

    28 import javax.swing.table.AbstractTableModel;

    29 import javax.swing.table.DefaultTableCellRenderer;

    30 import javax.swing.table.TableModel;

    31 

    32 /*

    33  * @test

    34  * @bug 8133919

    35  * @summary [macosx] JTable grid lines are incorrectly positioned on HiDPI display

    36  * @run main DrawGridLinesTest

    37  */

    38 public class DrawGridLinesTest {

    39 

    40     private static final int WIDTH = 300;

    41     private static final int HEIGHT = 150;

    42     private static final Color GRID_COLOR = Color.BLACK;

    43     private static final Color TABLE_BACKGROUND_COLOR = Color.BLUE;

    44     private static final Color CELL_RENDERER_BACKGROUND_COLOR = Color.YELLOW;

    45     private static final int SCALE = 2;

    46 

    47     public static void main(String[] args) throws Exception {

    48         SwingUtilities.invokeAndWait(DrawGridLinesTest::checkTableGridLines);

    49     }

    50 

    51     private static void checkTableGridLines() {

    52 

    53         TableModel dataModel = new AbstractTableModel() {

    54             public int getColumnCount() {

    55                 return 10;

    56             }

    57 

    58             public int getRowCount() {

    59                 return 10;

    60             }

    61 

    62             public Object getValueAt(int row, int col) {

    63                 return " ";

    64             }

    65         };

    66 

    67         DefaultTableCellRenderer r = new DefaultTableCellRenderer();

    68         r.setOpaque(true);

    69         r.setBackground(CELL_RENDERER_BACKGROUND_COLOR);

    70 

    71         JTable table = new JTable(dataModel);

    72         table.setSize(WIDTH, HEIGHT);

    73         table.setDefaultRenderer(Object.class, r);

    74         table.setGridColor(GRID_COLOR);

    75         table.setShowGrid(true);

    76         table.setShowHorizontalLines(true);

    77         table.setShowVerticalLines(true);

    78         table.setBackground(TABLE_BACKGROUND_COLOR);

    79 

    80         checkTableGridLines(table);

    81     }

    82 

    83     private static void checkTableGridLines(JTable table) {

    84 

    85         int w = SCALE * WIDTH;

    86         int h = SCALE * HEIGHT;

    87 

    88         BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

    89         Graphics2D g = img.createGraphics();

    90         g.scale(SCALE, SCALE);

    91         table.paint(g);

    92         g.dispose();

    93 

    94         int size = Math.min(w, h);

    95         int rgb = TABLE_BACKGROUND_COLOR.getRGB();

    96 

    97         for (int i = 0; i < size; i++) {

    98             if (img.getRGB(i, i) == rgb || img.getRGB(i, size - i - 1) == rgb) {

    99                 throw new RuntimeException("Artifacts in the table background color!");

   100             }

   101         }

   102     }

   103 }