/*
 * AnalogClock.java
 * Displays the current time on an old style analog clock
 */

/**
 * Created 11/2011
 * By Randall Twede
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Calendar;
import java.net.*;
import java.awt.image.BufferedImage;

public class AnalogClock extends JPanel implements ActionListener
{
    private Timer timer = new Timer(1000,this);
	private URL url;
    private Image face;
    private int second;	// the second
    private int minute;	// the minute
    private int hour;	// the hour
    private double secondAngle;	// the angle of the second hand
    private double minuteAngle;	// the angle of the minute hand
    private double hourAngle;	// the angle of the hour hand
    private int secondLength;	// the length of the second hand
    private int minuteLength;	// the length of the minute hand
    private int hourLength;		// the length of the hour hand
	private Point origin;
	
	public AnalogClock(int minuteHandLength)
	{
		secondLength = minuteHandLength;
		minuteLength = minuteHandLength;
		hourLength = (int)(minuteHandLength * 0.75);
		origin = new Point(minuteHandLength, minuteHandLength);
		timer.start();
	}
	
	public AnalogClock(int minuteHandLength, Image clockFace)
	{
		secondLength = minuteHandLength;
		minuteLength = minuteHandLength;
		hourLength = (int)(minuteHandLength * 0.75);
		face = clockFace;
		origin = new Point((int)face.getWidth(null)/2, (int)face.getHeight(null)/2);
		timer.start();
	}

    public Dimension getPreferredSize()
    {
		Dimension d = null;
		if(face != null)
		{
			d = new Dimension(face.getWidth(null), face.getHeight(null));
		}
		else
		{
			d = new Dimension(minuteLength * 2, minuteLength * 2);
		}
		return d;
    }

    public void actionPerformed(ActionEvent e)
    {
		getTime();
		hourAngle = (Math.PI/2 - hour * (Math.PI / 6)) - minute * (Math.PI / 360);
		minuteAngle = Math.PI/2 - minute * (Math.PI / 30);
		secondAngle = Math.PI/2 - second * (Math.PI / 30);
		repaint();
    }

    public void paintComponent(Graphics g)
    {
		super.paintComponent(g);
		g.drawImage(face, 0, 0, null);
		Graphics2D g2 = (Graphics2D)g;
        RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHints(rh);    
		g2.setStroke(new BasicStroke(4));
		g2.drawLine(origin.x,origin.y,(int)(origin.x + Math.cos(minuteAngle) * minuteLength),(int)(origin.y - Math.sin(minuteAngle) * minuteLength));
		g2.drawLine(origin.x,origin.y,(int)(origin.x + Math.cos(hourAngle) * hourLength),(int)(origin.y - Math.sin(hourAngle) * hourLength));
		g2.setStroke(new BasicStroke(1));
		g2.setColor(Color.RED);
		g2.drawLine(origin.x,origin.y,(int)(origin.x + Math.cos(secondAngle) * secondLength),(int)(origin.y - Math.sin(secondAngle) * secondLength));
    }
	
    private void getTime()
    {
		Calendar now = Calendar.getInstance();
		hour = now.get(Calendar.HOUR);
		minute = now.get(Calendar.MINUTE);
		second = now.get(Calendar.SECOND);
    }
}