import awb.*;
import java.awt.*;
import java.awt.event.*;

public class DiaParms extends java.applet.Applet implements ActionListener
{
    IntField gSize;
    TextArea ta;
    Button bDraw;
    String stars = "*******************";
    String spaces = "          ";
    
    public void init()
    {   
        gSize = new IntField(10);
        ta = new TextArea(20, 20);
        ta.setFont(new Font("Monospaced", Font.BOLD, 12));
        bDraw = new Button("Draw");
        bDraw.addActionListener(this);
        add(gSize);
        add(bDraw);
        add(ta);
    }
    
    void Dia(int sz)
    {
    
        int k = 0;
        while (k < sz)
        {
               
            ta.append(spaces.substring(0,10-k) + 
                      stars.substring(0,2*k+1)+"\n");
            k = k + 1;
        }
    }
    
    void Mond(int sz)
    {
        int k = sz;
        while (k > 0)
        {             
            k = k - 1;
            ta.append(spaces.substring(0,10-k) + 
                      stars.substring(0,2*k+1)+"\n");
        }
    }
    
    public void actionPerformed(ActionEvent event)
    {
	int sz;
        Object cause = event.getSource();

        if (cause == bDraw)
        {
            sz = gSize.getInt();
            Dia(sz);    
            Mond(sz-1);
        }
    }
}