test/jdk/java/awt/Graphics/RepeatedRepaintTest.java

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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.lang.reflect.InvocationTargetException;

/*
 * @test
 * @bug 4081126 4129709
 * @summary Test for proper repainting on multiprocessor systems.
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual RepeatedRepaintTest
 */
public class RepeatedRepaintTest extends Frame {
    private Font font = null;
    private Image background;

    static String INSTRUCTIONS = """
            The frame next to this window called "AWT Draw Test" has
            some elements drawn on it. Move this window partially outside of the
            screen bounds and then drag it back. Repeat it couple of times.
            Drag the instructions window over the frame partially obscuring it.
            If after number of attempts the frame content stops repainting
            press "Fail", otherwise press "Pass".
            """;

    public RepeatedRepaintTest() {
        setTitle("AWT Draw Test");
        setSize(300, 300);
        background = new BufferedImage(300, 300, BufferedImage.TYPE_INT_ARGB);
        Graphics g = background.getGraphics();
        g.setColor(Color.black);
        g.fillRect(0, 0, 300, 300);
        g.dispose();
    }

    public void paint(Graphics g) {
        Dimension dim = this.getSize();
        super.paint(g);
        g.drawImage(background, 0, 0, dim.width, dim.height, null);
        g.setColor(Color.white);
        if (font == null) {
            font = new Font("SansSerif", Font.PLAIN, 24);
        }
        g.setFont(font);
        FontMetrics metrics = g.getFontMetrics();
        String message = "Draw Test";
        g.drawString(message, (dim.width / 2) - (metrics.stringWidth(message) / 2),
                (dim.height / 2) + (metrics.getHeight() / 2));

        int counter = 50;
        for (int i = 0; i < 50; i++) {
            counter += 4;
            g.drawOval(counter, 50, i, i);
        }

        counter = 20;
        for (int i = 0; i < 100; i++) {
            counter += 4;
            g.drawOval(counter, 150, i, i);
        }
        g.setColor(Color.black);
        g.drawLine(0, dim.height - 25, dim.width, dim.height - 25);
        g.setColor(Color.gray);
        g.drawLine(0, dim.height - 24, dim.width, dim.height - 24);
        g.setColor(Color.lightGray);
        g.drawLine(0, dim.height - 23, dim.width, dim.height - 23);
        g.fillRect(0, dim.height - 22, dim.width, dim.height);


        g.setXORMode(Color.blue);
        g.fillRect(0, 0, 25, dim.height - 26);
        g.setColor(Color.red);
        g.fillRect(0, 0, 25, dim.height - 26);
        g.setColor(Color.green);
        g.fillRect(0, 0, 25, dim.height - 26);
        g.setPaintMode();

        Image img = createImage(50, 50);
        Graphics imgGraphics = img.getGraphics();
        imgGraphics.setColor(Color.magenta);
        imgGraphics.fillRect(0, 0, 50, 50);
        imgGraphics.setColor(Color.yellow);
        imgGraphics.drawString("offscreen", 0, 20);
        imgGraphics.drawString("image", 0, 30);

        g.drawImage(img, dim.width - 100, dim.height - 100, Color.blue, null);

        g.setXORMode(Color.white);
        drawAt(g, 100, 100, 50, 50);
        drawAt(g, 105, 105, 50, 50);
        drawAt(g, 110, 110, 50, 50);
    }

    public void drawAt(Graphics g, int x, int y, int width, int height) {
        g.setColor(Color.magenta);
        g.fillRect(x, y, width, height);
    }

    public static void main(String[] args) throws InterruptedException,
            InvocationTargetException {
        PassFailJFrame.builder()
                .title("Repeated Repaint Test Instructions")
                .instructions(INSTRUCTIONS)
                .testUI(RepeatedRepaintTest::new)
                .build()
                .awaitAndCheck();
    }
}