//***************************************************************
//  KochSnowflake.java      Authors: Lewis and Loftus
//                          Updated: Bary W Pollack
//
//  Demonstrates the use of recursion.
//***************************************************************

///import KochPanel;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class KochSnowflake extends JApplet implements ActionListener {

    //------------------------------------------------------------
    //  Sets up the components for the applet.
    //------------------------------------------------------------
    public void init() {
        JPanel tools = new JPanel();
        tools.setLayout(new BoxLayout(tools, BoxLayout.X_AXIS));
        tools.setBackground(Color.yellow);
        tools.setOpaque(true);

        JLabel titleLabel = new JLabel("      The Koch Snowflake");
        titleLabel.setForeground(Color.black);
   
        increase = new JButton(new ImageIcon("increase.gif"));
        increase.setPressedIcon(new ImageIcon("increasePressed.gif"));
        increase.setMargin(new Insets(0, 0, 0, 0));
        increase.addActionListener(this);

        decrease = new JButton(new ImageIcon("decrease.gif"));
        decrease.setPressedIcon(new ImageIcon("decreasePressed.gif"));
        decrease.setMargin(new Insets(0, 0, 0, 0));
        decrease.addActionListener(this);

        orderLabel = new JLabel("Order: 1     ");
        orderLabel.setForeground(Color.black);

        tools.add(titleLabel);
        tools.add(Box.createHorizontalStrut(20));
        tools.add(decrease);
        tools.add(increase);
        tools.add(Box.createHorizontalStrut(20));
        tools.add(orderLabel);

        drawing = new KochPanel(1);

        JPanel appletPanel = new JPanel();
        appletPanel.add(tools);
        appletPanel.add(drawing);

        getContentPane().add(appletPanel);

        setSize(APPLET_WIDTH, APPLET_HEIGHT);
    }

    //------------------------------------------------------------
    //  Determines which button was pushed, and sets the
    //  new order if it is in range.
    //------------------------------------------------------------
    public void actionPerformed(ActionEvent event) {
        int order = drawing.getOrder();

        if (event.getSource() == increase)
            order++;
        else
            order--;

        if (order >= MIN && order <= MAX) {
            orderLabel.setText("Order: " + order + "     ");
            drawing.setOrder(order);
            repaint();
        }
    }

    private final int APPLET_WIDTH  = 400;
    private final int APPLET_HEIGHT = 440;
    private final int MIN = 1, MAX = 9;

    private JButton increase, decrease;
    private JLabel orderLabel;
    private KochPanel drawing;
}