//
//  CipherApp.java
//
//  Created by Edward on 2/9/06
//	Last revision: 2/16/06
//

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

public class CipherApp extends JApplet implements ActionListener {

	// initialize variables
	String lineIn = "";
	String lineOut = "";
	Font myFont = new Font("monospaced",0,12);
	int x;
	int[] y;
	int inputLength;
	JTextField typed;
	JButton rot;

	// heart of the program, the rest is just io and a loop
	public static int rotate (int letter, int shift) {
	  int foo = ((letter >= 'a') && (letter <= 'z') ? ((letter - 'a' + shift) % 26 + 'a') :
       ((letter >= 'A') && (letter <= 'Z') ? ((letter - 'A' + shift) % 26 + 'A') : letter));
    return foo;
    }

	public void setUpGUI() {
        // set the default look and feel
        String laf = UIManager.getSystemLookAndFeelClassName();
        try { UIManager.setLookAndFeel(laf);
        } catch (UnsupportedLookAndFeelException exc) {
            System.err.println ("Warning: UnsupportedLookAndFeel: " + laf);
        } catch (Exception exc) {
            System.err.println ("Error loading " + laf + ": " + exc);
        }
		// set up coordinates for the output
		x = 5;
		y = new int[27];
		for (int i = 0; i < 27; i++) {
		  y[i] = 14*(i+1);
		  }
		// add text box and button
		typed = new JTextField("Type something to cipher here", 20);
		rot = new JButton("Rotate");
		rot.addActionListener(this);
        JPanel pane = new JPanel();
		pane.add(typed);
		pane.add(rot);
		setContentPane(pane); //Makes buttons actually show up
	}

	public void actionPerformed(ActionEvent e) {
		Object src = e.getSource();
		if (src == rot) {
			repaint();
		}
	}
	
    public void init() {
		setUpGUI();
	}

    public void paint (Graphics g) {
	  super.paint(g);
	  g.setFont(myFont);
	  g.setColor(Color.black);
	  lineIn = typed.getText();
	  inputLength = lineIn.length();
	  // and now for the loop
	  for (int j = 1 ; j < 26 ; j++) {
		lineOut = (j < 10 ? " "+j+" " : j+" ");
		for (int i = 0 ; i < inputLength ; i++) {
		  lineOut += (char)rotate(lineIn.charAt(i),j);
		}
	  g.drawString(lineOut, x, y[j+1]);
	  }
    }
}