// The copyright of this program is reserved by �N�L.
/* 
Turtle Graphics / �V�_�l�Ȑ�
*/ 

/* <applet code="Ex061015c.class" width=400 height=400> </applet> */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Ex061015c extends JApplet implements ActionListener{
	double th,Leng;
	double minl;
	dTurtle t;
	boolean flag=false;
	JComboBox cb2;
	String cbl2[]={"��=15��","��=30��","��=45��","��=60��","��=75��","��=90��","��=105��","��=120��"};	
	double ang[]={15.0,30.0,45.0,60.0,75.0,90.0,105.0,120.0};
	public void init(){
		Container cp = getContentPane();
		JPanel pl = new JPanel();
    pl.setLayout(null);
		pl.setBackground(Color.black);
    cb2 = new JComboBox(cbl2);
    cb2.setBounds(0,0,80,20);
    cb2.setSelectedIndex(0);
    cb2.addActionListener(this);
		pl.add(cb2);
		t = new dTurtle(200,380);
		t.setColor(Color.green);
		cp.add(pl);
	}
	
	public void actionPerformed(ActionEvent event){
		th = ang[cb2.getSelectedIndex()];
		Leng=90.0;
		minl=1.0;	
		flag=true;
		repaint();
	}
	
	public void paint(Graphics g){
		super.paint(g);
		if(flag==true)
			tree(Leng,g);
	}
	
	public void tree(double length,Graphics g){
		t.move(length,g);
		if(length>minl){
			t.turn(th);
			tree(length*.375,g);
			t.turn(-th*2);
			tree(length*.375,g);
			t.turn(th);
			t.turn(-3.5);
			tree(length*.75,g);
			t.turn(3.5);
	 	}
		t.warp(-length);
	}
}