/*

 * Copyright (c) 2016, 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.

 */

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import javax.swing.JTable;

import javax.swing.SwingUtilities;

import javax.swing.table.AbstractTableModel;

import javax.swing.table.DefaultTableCellRenderer;

import javax.swing.table.TableModel;

/*

 * @test

 * @bug 8133919

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

 * @run main DrawGridLinesTest

 */

public class DrawGridLinesTest {

    private static final int WIDTH = 300;

    private static final int HEIGHT = 150;

    private static final Color GRID_COLOR = Color.BLACK;

    private static final Color TABLE_BACKGROUND_COLOR = Color.BLUE;

    private static final Color CELL_RENDERER_BACKGROUND_COLOR = Color.YELLOW;

    private static final int SCALE = 2;

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

        SwingUtilities.invokeAndWait(DrawGridLinesTest::checkTableGridLines);

    }

    private static void checkTableGridLines() {

        TableModel dataModel = new AbstractTableModel() {

            public int getColumnCount() {

                return 10;

            }

            public int getRowCount() {

                return 10;

            }

            public Object getValueAt(int row, int col) {

                return " ";

            }

        };

        DefaultTableCellRenderer r = new DefaultTableCellRenderer();

        r.setOpaque(true);

        r.setBackground(CELL_RENDERER_BACKGROUND_COLOR);

        JTable table = new JTable(dataModel);

        table.setSize(WIDTH, HEIGHT);

        table.setDefaultRenderer(Object.class, r);

        table.setGridColor(GRID_COLOR);

        table.setShowGrid(true);

        table.setShowHorizontalLines(true);

        table.setShowVerticalLines(true);

        table.setBackground(TABLE_BACKGROUND_COLOR);

        checkTableGridLines(table);

    }

    private static void checkTableGridLines(JTable table) {

        int w = SCALE * WIDTH;

        int h = SCALE * HEIGHT;

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

        Graphics2D g = img.createGraphics();

        g.scale(SCALE, SCALE);

        table.paint(g);

        g.dispose();

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

        int rgb = TABLE_BACKGROUND_COLOR.getRGB();

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

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

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

            }

        }

    }

}