import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;
 
public class StrokeTest extends JPanel
{
    BufferedImage image;
    Rectangle r;
    BasicStroke stroke;
 
    public StrokeTest(BufferedImage image)
    {
        this.image = image;
        r = new Rectangle(50,50,100,100);
        stroke = new BasicStroke(3f);
    }
 
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        int x = (w - image.getWidth())/2;
        int y = (h - image.getHeight())/2;
        g2.drawImage(image, x, y, this);
        g2.setXORMode(Color.green);
        //g2.drawRect(r.x, r.y, r.width, r.height);
        g2.draw(r);
        AffineTransform at = AffineTransform.getTranslateInstance(150, 150);
        g2.fill(at.createTransformedShape(stroke.createStrokedShape(r)));
        g2.setPaintMode();
    }
 
    public void setRect(int x, int y)
    {
        r.x = x;
        r.y = y;
        repaint();
    }
 
    public static void main(String[] args) throws IOException
    {
        String path = "images/owls.jpg";
        BufferedImage image = ImageIO.read(StrokeTest.class.getResource(path));
        StrokeTest test = new StrokeTest(image);
        Dragster dragster = new Dragster(test);
        test.addMouseListener(dragster);
        test.addMouseMotionListener(dragster);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(test);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}
 
class Dragster extends MouseInputAdapter
{
    StrokeTest strokeTest;
    Point offset;
    boolean dragging;
 
    public Dragster(StrokeTest st)
    {
        strokeTest = st;
        offset = new Point();
        dragging = false;
    }
 
    public void mousePressed(MouseEvent e)
    {
        Point p = e.getPoint();
        Rectangle r = strokeTest.r;
        if(r.contains(p))
        {
            offset.x = p.x - r.x;
            offset.y = p.y - r.y;
            dragging = true;
        }
    }
 
    public void mouseReleased(MouseEvent e)
    {
        dragging = false;
    }
 
    public void mouseDragged(MouseEvent e)
    {
        if(dragging)
        {
            int x = e.getX() - offset.x;
            int y = e.getY() - offset.y;
            strokeTest.setRect(x, y);
        }
    }
}