Classe: FormaCurvilineaIrregolareChiusa

 1 package formacurvilineairregolarechiusa;
 2 
 3 import javax.swing.*;
 4 import java.awt.*;
 5 import java.awt.event.MouseAdapter;
 6 import java.awt.event.MouseEvent;
 7 import java.awt.geom.Path2D;
 8 
 9 public class FormaCurvilineaIrregolareChiusa {
10     public static void main(String[] args) {
11         SwingUtilities.invokeLater(() -> {
12             JFrame frame = new JFrame("Forma Curvilinea Irregolare Chiusa");
13             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
14             frame.add(new CustomPanel());
15             frame.setSize(500, 500);
16             frame.setVisible(true);
17         });
18     }
19 
20     static class CustomPanel extends JPanel {
21         private boolean clicked = false;
22         private Path2D path;
23 
24         CustomPanel() {
25             path = createPath();
26             addMouseListener(new MouseAdapter() {
27                 @Override
28                 public void mouseClicked(MouseEvent e) {
29                     if (path.contains(e.getPoint())) {
30                         clicked = !clicked;
31                         repaint();
32                     }
33                 }
34             });
35         }
36 
37         private Path2D createPath() {
38             Path2D path = new Path2D.Double();
39             // Punto di inizio
40             path.moveTo(100, 200); 
41             // Prima curva di Bézier
42             path.curveTo(150, 100, 250, 100, 300, 200); 
43             // Seconda curva di Bézier
44             path.curveTo(350, 300, 250, 400, 200, 300);            
45             // Terza curva di Bézier che ritorna al punto di inizio
46             path.curveTo(150, 400, 100, 300, 100, 200); 
47             path.closePath(); // Chiude la forma
48             return path;
49         }
50 
51         @Override
52         protected void paintComponent(Graphics g) {
53             super.paintComponent(g);
54             Graphics2D g2d = (Graphics2D) g;
55             g2d.setColor(Color.BLACK);
56 
57             if (clicked) {
58                 g2d.setStroke(new BasicStroke(5)); // Aumenta lo spessore
59             } else {
60                 g2d.setStroke(new BasicStroke(1)); // Spessore normale
61             }
62 
63             g2d.draw(path);
64         }
65     }
66 }