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

class GUIUtsyn extends Utsyn {
    private JButton tell, resett, slutt;
    private JFrame vindu;
    private JLabel antall;
    private JPanel panel;
    
    class OekTeller implements ActionListener {
        @Override
         public void actionPerformed (ActionEvent e) {
                kontroll.oekTeller();
        }
    }

    class Nuller implements ActionListener {
        @Override
        public void actionPerformed (ActionEvent e) {
            kontroll.nullstillTeller();
        }
    }
    
    class Stopper implements ActionListener {
        @Override
        public void actionPerformed (ActionEvent e) {
            kontroll.avslutt();
        }
    }
    
    GUIUtsyn (Kontroll k) {
	    super(k);
	    try {
            UIManager.setLookAndFeel(
                UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) { System.exit(1); }
	}
    
	@Override
	public void init() {	
        vindu = new JFrame("Teller");
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        panel = new JPanel();
        vindu.add(panel);
        
        antall = new JLabel("  0  ");
        
        tell = new JButton(" +1 ");
        tell.addActionListener(new OekTeller());
        
        resett = new JButton(" = 0 ");     
        resett.addActionListener(new Nuller());  
              
        slutt = new JButton("Exit");
        slutt.addActionListener(new Stopper());

        panel.add(antall);  panel.add(tell);
	    panel.add(resett);  panel.add(slutt);
	    
        vindu.pack();  
	    vindu.setLocationRelativeTo(null);
        vindu.setVisible(true);
        
    }
    @Override
    void visFramTeller (int t) {
	antall.setText("  " + t + "  ");
    }
}