jdk-24/test/jdk/javax/swing/JTable/8236907/LastVisibleRow.java

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/*
 * @test
 * @key headful
 * @bug 8236907
 * @summary  Verifies if JTable last row is visible.
 * @run main LastVisibleRow
 */

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.InputEvent;
import java.awt.image.BufferedImage;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.io.File;
import java.lang.reflect.InvocationTargetException;

import javax.imageio.ImageIO;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

public class LastVisibleRow {
    static JFrame frame;
    static JTable table;
    static Robot testRobot;

    public static void main(String[] args) throws Exception {
        Point clkPoint;
        try {
            testRobot = new Robot();
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    createAndShowGUI();
                }
            });
            testRobot.delay(1000);
            testRobot.waitForIdle();
            BufferedImage bufferedImageBefore = testRobot.createScreenCapture(getCaptureRect());
            testRobot.delay(1000);
            testRobot.waitForIdle();
            clkPoint = getMousePosition();
            mouseEvents(clkPoint);
            testRobot.waitForIdle();
            clearSelect();
            testRobot.delay(1000);
            testRobot.waitForIdle();
            BufferedImage bufferedImageAfter = testRobot.createScreenCapture(getCaptureRect());

            testRobot.delay(1000);

            if (!compare(bufferedImageBefore, bufferedImageAfter)) {
                ImageIO.write(bufferedImageBefore, "png",
                        new File("bufferedImageBefore.png"));
                ImageIO.write(bufferedImageAfter, "png",
                        new File("bufferedImageAfter.png"));
                throw new RuntimeException("Test Case Failed!!, Last Row not Visible!!!");
            }
        } finally {
            if (frame != null) SwingUtilities.invokeAndWait(() -> frame.dispose());
        }
    }

    // Get clickable screen point for particular row and column of a table
    private static Point getCellClickPoint(final int row, final int column) {
        Rectangle rect = table.getCellRect(row, column, false);
        Point clickPoint = new Point(rect.x + rect.width / 2,
                rect.y + rect.height / 2);
        SwingUtilities.convertPointToScreen(clickPoint, table);

        return clickPoint;
    }

    private static void createAndShowGUI() {
        final PrintRequestAttributeSet printReqAttr = new HashPrintRequestAttributeSet();
        printReqAttr.add(javax.print.attribute.standard.OrientationRequested.LANDSCAPE);
        frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();
        JPanel centerPane = new JPanel(new BorderLayout());
        centerPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        JPanel tablePaneContainer = new JPanel(new BorderLayout());
        JPanel tablePane = new JPanel(new BorderLayout());
        table = new JTable(new Object[][]{{"row_1_col_1", "row_1_col_2", "row_1_col_3"},
                {"row_2_col_1", "row_2_col_2", "row_2_col_3"}, {"row_3_col_1", "row_3_col_2",
                "row_3_col_3"}, {"row_4_col_1", "row_4_col_2", "row_4_col_3"}},
                new String[]{"Col1", "Col2", "Col3"});
        table.setPreferredSize(new Dimension(0, (table.getRowHeight() * 3)));

        tablePane.add(table.getTableHeader(), BorderLayout.NORTH);
        tablePane.add(table, BorderLayout.CENTER);
        tablePaneContainer.add(tablePane, BorderLayout.CENTER);
        centerPane.add(tablePaneContainer, BorderLayout.NORTH);
        contentPane.add(centerPane, BorderLayout.CENTER);
        frame.setSize(400, 120);
        frame.setVisible(true);
        frame.setLocationRelativeTo(null);
    }

    // mouseEvents for last row click
    private static void mouseEvents(Point clkPnt) {
        testRobot.mouseMove(clkPnt.x, clkPnt.y);
        testRobot.delay(50);
        testRobot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
        testRobot.delay(50);
        testRobot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
        testRobot.delay(50);
    }

    // getMousePosition Actions for last row click
    private static Point getMousePosition() throws Exception {
        final Point[] clickPoint = new Point[1];
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                clickPoint[0] = getCellClickPoint(2, 0);
            }
        });
        return clickPoint[0];
    }

    // Clears the selected table row
    private static void clearSelect() throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                table.getSelectionModel().clearSelection();
                table.setFocusable(false);
            }
        });
    }

    // getCaptureRect Method - To Compute the Rectangle Area of last row
    private static Rectangle getCaptureRect() throws InterruptedException, InvocationTargetException {
        final Rectangle[] captureRect = new Rectangle[1];
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                Rectangle cellRect = table.getCellRect(2, 0, true);
                Point point = new Point(cellRect.x, cellRect.y);
                SwingUtilities.convertPointToScreen(point, table);

                captureRect[0] = new Rectangle(point.x+5, point.y+2,
                        table.getColumnCount() * cellRect.width - 10,
                        cellRect.height-2);
            }
        });
        return captureRect[0];
    }

    // Compare method - to compare two images.
    static Boolean compare(BufferedImage bufferedImage1, BufferedImage bufferedImage2) {
        if (bufferedImage1.getWidth() == bufferedImage2.getWidth()
                && bufferedImage1.getHeight() == bufferedImage2.getHeight()) {
            for (int x = 0; x < bufferedImage1.getWidth(); x++) {
                for (int y = 0; y < bufferedImage1.getHeight(); y++) {
                    if (bufferedImage1.getRGB(x, y) != bufferedImage2.getRGB(x, y)) {
                        return false;
                    }
                }
            }
        } else {
            return false;
        }
        return true;
    }
}