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

public class Shapes extends java.applet.Applet implements ActionListener
{
    IntField gSize;
    TextArea ta;
    String stars = "*******************";
    String spaces = "          ";
    Button bDiamond, bHGlass, bTree, bChain;
                            
    public void init()
    {   
        gSize = new IntField(10);
        bDiamond = new Button("Diamond");
        bHGlass = new Button("Hour Glass");
        bTree = new Button("Tree");
        bChain = new Button("Chain");
        ta = new TextArea(20, 20);
        ta.setFont(new Font("Courier", Font.BOLD, 10));
	bDiamond.addActionListener(this);
	bHGlass.addActionListener(this);
	bTree.addActionListener(this);
	bChain.addActionListener(this);
        add(gSize);
        add(bDiamond);
        add(bHGlass);
        add(bTree);
        add(bChain);
        add(ta);
    }
    
    void BlankLine()
    {
        ta.append(" \n");
    }

    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");
        }
    }
    
    void Diamond(int sz)
    {
        BlankLine();
        Dia(sz);
        Mond(sz-1);
    }
    
    void Tree(int sz)
    {
        BlankLine();
        Dia(sz - 4);
        Dia(sz - 2);
        Dia(sz);
        Dia(1);
        Dia(1);
    }
    
    void Chain(int sz)
    {
        int k = 0;
        BlankLine();
        while (k < sz)
        {
            Dia(2);
            Mond(1);
            k = k + 1;
        }
    }
    
    public void actionPerformed(ActionEvent event)
    {
        Object cause = event.getSource();
        int sz;

        if (cause == bDiamond)
        {
            sz = gSize.getInt();
            Diamond(sz);
        }
        if (cause == bHGlass)
        {
            sz = gSize.getInt();
            BlankLine();
            Mond(sz);
            Dia(sz);
        }
        if (cause == bTree)
        {
            sz = gSize.getInt();
            Tree(sz);
        }
        if (cause == bChain)
        {
            sz = gSize.getInt();
            Chain(sz);
        }
    }
}