/*
 * Clock1 - simplest possible clock using ClockTimer
 */

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


public class Clock1
        extends JFrame
        implements GUIClock
{

    private JTextField textF = null;
    private ClockTimer time;

    public Clock1() {
        draw();
    }

  
    /*
     * Draw the UI initially.
     */
    private void draw() {
        JFrame mainFrame = new JFrame("Clock1");
        mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // text field to display time
        textF = new JTextField("");
        textF.setColumns(8);
        textF.setEditable(false);
        mainFrame.add(textF);

        // start the clock timer thread to update this clock
        new ClockTimer(this, 1).execute();

        //Display the window.
        mainFrame.pack();
        mainFrame.setVisible(true);

    }   // draw()


    // update is called from the ClockTimer.process() by event dispatcher thread
    public void update(GregorianCalendar t) {
        String ts = t.get(t.HOUR) + ":" + t.get(t.MINUTE) + ":" + t.get(t.SECOND);
        textF.setText(ts);
    }


    /*
     * Start the gui.
     */
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                Clock1 cgui = new Clock1();
            }
        });
    } // main()

}   // class Clock1