test/jdk/java/awt/geom/Area/Translate.java

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/*
 * @test
 * @bug 4183373
 * @summary Verifies that the translated Area objects display correctly
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual Translate
 */

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Rectangle2D;

public class Translate {
    public static void main(String[] args) throws Exception {
        String INSTRUCTIONS = """
            This test displays two sets of rectangular figures. The two sets
            should be displayed one on top of the other and should be lined
            up vertically with each other. If the two sets of figures are
            not directly above and below each other then the test fails
            """;

        PassFailJFrame.builder()
            .title("Test Instructions")
            .instructions(INSTRUCTIONS)
            .columns(35)
            .testUI(initialize())
            .build()
            .awaitAndCheck();
    }
    private static Frame initialize() {
        Frame f = new Frame("Translate");
        TranslatePanel panel = new TranslatePanel();
        f.add(panel);
        f.setSize(300, 250);
        return f;
    }
}

class TranslatePanel extends Panel {
    private static Image bufferedImage;
    private static Area a1, a2, a3;

    public TranslatePanel() {
        a1 = new Area(new Rectangle2D.Double(20.0, 20.0, 60.0, 60.0));

        a2 = new Area((Area) a1.clone());
        a2.subtract(new Area(new Rectangle2D.Double(30.0, 30.0, 40.0, 40.0)));

        a3 = new Area((Area) a2.clone());
        a3.add(new Area(new Rectangle2D.Double(40.0, 40.0, 20.0, 20.0)));

        AffineTransform at2 = new AffineTransform();
        at2.translate(100.0, 0.0);
        a2.transform(at2);

        AffineTransform at3 = new AffineTransform();
        at3.translate(200.0, 0.0);
        a3.transform(at3);
    }
    private void paintRects(Graphics2D g2) {
        Rectangle clip = g2.getClipBounds();
        g2.setColor(Color.white);
        g2.fillRect(clip.x, clip.y, clip.width, clip.height);
        g2.setPaint(Color.red);
        g2.fill(a1);
        g2.setPaint(Color.yellow);
        g2.fill(a2);
        g2.setPaint(Color.blue);
        g2.fill(a3);
    }

    @Override
    public void paint(Graphics g) {
        if (bufferedImage == null) {
            bufferedImage = createImage(300, 100);
            Graphics big = bufferedImage.getGraphics();
            // Notice that if you remove the translate() call, it works fine.
            big.translate(-1, -1);
            big.setClip(1, 1, 300, 100);
            paintRects((Graphics2D)big);
            big.translate(1, 1);
        }
        paintRects((Graphics2D)g);
        g.drawImage(bufferedImage, 1, 100, this);
        g.setColor(Color.black);
        g.drawString("From offscreen image (with translate):", 10, 95);
        g.drawString(" (should line up with rectangles above)", 10, 110);
    }
}