import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Color;
import java.awt.Dimension;

/**
 * .
 *
 * @author (MB)
 * @version (20.10.10)
 */
public class TrafficLight extends JFrame implements ActionListener
{

    /**
     * Konstruktor zum konstruieren von einer Straßenampel
     */
    private JPanel pnPanel;
    private JTextField tfLight1, tfLight2, tfLight3;
    private JLabel lbTFBg1, lbTFBg2;
    private JButton btLight1, btLight2, btLight3, btNext;
    private int iActivePhase;

    public TrafficLight()
    {
        super("TrafficL");
        pnPanel = new JPanel();
        getContentPane().add(pnPanel);
        pnPanel.setLayout(null);
        setBounds(50, 70, 40, 170);

        tfLight1 = new JTextField("");
        tfLight1.setForeground( Color.RED );
        tfLight1.setBackground( Color.GRAY );
        tfLight1.setOpaque(true);
        tfLight1.setBounds(10, 10, 30, 30);

        tfLight2 = new JTextField("");
        tfLight2.setForeground( Color.YELLOW );
        tfLight2.setBackground( Color.GRAY );
        tfLight2.setOpaque(true);
        tfLight2.setBounds(10, 40, 30, 30);

        tfLight3 = new JTextField("");
        tfLight3.setForeground( Color.RED );
        tfLight3.setBackground( Color.GRAY );
        tfLight3.setOpaque(true);
        tfLight3.setBounds(10, 70, 30, 30);




        btNext = new JButton("Go");
        btNext.setBounds(32, 100, 60, 20);
        btNext.addActionListener(this);
        btNext.setActionCommand("Go");

        lbTFBg1 = new JLabel("");
        lbTFBg1.setBackground( Color.BLACK );
        lbTFBg1.setOpaque(true);
        lbTFBg1.setBounds(5, 5, 40, 90);

        lbTFBg2 = new JLabel("");
        lbTFBg2.setBackground( Color.BLACK );
        lbTFBg2.setOpaque(true);
        lbTFBg2.setBounds(20, 100, 10, 50);


        pnPanel.add(tfLight3, 0);
        pnPanel.add(tfLight2, 1);
        pnPanel.add(tfLight1, 2);



        pnPanel.add(btNext);

        pnPanel.add(lbTFBg1, 3);
        pnPanel.add(lbTFBg2);

        iActivePhase = 0;
        tfLight1.setBackground( Color.RED );

        setVisible(true);
    }

    }
    public void actionPerformed(ActionEvent e) {

        tfLight1.setBackground( Color.GRAY );
        tfLight2.setBackground( Color.GRAY );
        tfLight3.setBackground( Color.GRAY );



        if("Go" == e.getActionCommand())
        {
            iActivePhase++;

            if(iActivePhase > 3)
            iActivePhase = 0;

            if(iActivePhase == 0)
            tfLight1.setBackground( Color.RED );

            if(iActive

            if(iActivePhase == 1)
            tfLight2.setBackground( Color.YELLOW  );

            if(iActivePhase == 1)
            tfLight1.setBackground( Color.RED );

            if(iActivePhase == 2)
            tfLight3.setBackground( Color.GREEN );

            if(iActivePhase == 3)
            tfLight2.setBackground( Color.YELLOW );




        }
    }
}