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import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Line2D;
import java.util.ArrayList;
import java.util.List;

public class test {
    public static void main(String args[]) {
        JFrame window = new JFrame();
        window.setSize(600, 600);
        window.setTitle("test");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        TestComponent tc = new TestComponent();
        window.add(tc);
        window.setVisible(true);


    }
}

class Edge extends Line2D.Double {
    boolean active = true;

    Edge(double x1, double y1, double x2, double y2) {
        super(x1, y1, x2, y2);
    }

    public void click(Point p) {
        int HITBOX_SIZE = 10;
        int boxX = p.x - HITBOX_SIZE / 2;
        int boxY = p.y - HITBOX_SIZE / 2;
        System.out.printf("here %d, %d", p.x, p.y);
        if (intersects(boxX, boxY, HITBOX_SIZE, HITBOX_SIZE))
            active = !active;
    }
}

class TestComponent extends JComponent  {
    List<Edge> edges = new ArrayList<Edge>();

    TestComponent() {
        edges.add(new Edge(0, 0, 50, 50));
        edges.add(new Edge(50, 50, 50, 100));
        addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);
                for (Edge edge : edges) {
                    edge.click(e.getPoint());
                }
                repaint();
            }
        });
    }
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setStroke(new BasicStroke(2));
        for (Edge e : edges) {
            if (e.active)
                g2.setColor(Color.BLUE);
            else
                g2.setColor(Color.GRAY);
            g2.draw(e);
        }
    }
}