import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseListener;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import javax.swing.JPanel;

/**
   Un pannello con rettangolo visualizza un rettangolo che puo' essere spostato dall'utente premendo il pulsante del mouse
*/



public class RectanglePanel extends JPanel 
{  
  
 public RectanglePanel(int width, int height, int pos_x, int pos_y, int b_width, int b_height)
  {
    setPreferredSize(new Dimension(width, height));
    
    box = new Rectangle(pos_x, pos_y, b_width, b_height);
    
    // ricevitore di eventi

    class MousePressListener extends MouseAdapter
     {
       public void mousePressed(MouseEvent event)
        {
          int x = event.getX();
          int y = event.getY();
          box.setLocation(x,y);
          repaint(); 
 
        }

     }   

   MouseListener listener = new MousePressListener();
   addMouseListener(listener);
 
  }

  public void paintComponent(Graphics g)
   {
     super.paintComponent(g);
     Graphics2D g2 = (Graphics2D)g;
     g2.draw(box);
 
   }  

  private Rectangle box;
}