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

public class MdcSwing extends JFrame {
	
  public JToggleButton calculaL;
  public JToggleButton calculaR;
  public ButtonGroup grupoBotoes;
  public JButton calculaMDC;
  public JButton limpa;
  public JList historico;  	
  public JTextField valorX;
  public JTextField valorY;
  public JLabel campoX;
  public JLabel campoY;
  public JLabel branco;
  public Integer valorMDC;
  int x, y;

  /* Construtor */
  public MdcSwing() {
    super("Calculando o MDC...");
                
    calculaL= new JToggleButton("MDC-L", true);
    calculaR= new JToggleButton("MDC-R");
    grupoBotoes = new ButtonGroup();
    grupoBotoes.add (calculaL);
    grupoBotoes.add (calculaR);
    calculaMDC = new JButton ("Calcula MDC");
    limpa = new JButton ("Limpa");
            
    campoX = new JLabel("Valor de x");
    campoY = new JLabel("Valor de Y");
    valorY = new JTextField (5);
    valorX = new JTextField (5);
    branco = new JLabel("    ");
      
    JPanel paneMeio = new JPanel();
    JPanel paneCentral = new JPanel();
    JPanel paneBotoesNorte = new JPanel(); 
    JPanel paneBotoesSul = new JPanel(); 
    JPanel paneLista = new JPanel(); 
    JPanel paneGeral = new JPanel(); 
      
    final DefaultListModel modelo = new 
                         DefaultListModel();
    historico = new JList(modelo);

    paneBotoesSul.setBorder(
           BorderFactory.createTitledBorder(
                                 "Opções"));
    paneBotoesNorte.setLayout(new FlowLayout());
    paneBotoesNorte.add(calculaL);
    paneBotoesNorte.add(calculaR);
    setContentPane(paneBotoesNorte);

    paneBotoesSul.setLayout(new FlowLayout());
    paneBotoesSul.add(calculaMDC);
    paneBotoesSul.add(limpa);
    setContentPane(paneBotoesSul);
    paneCentral.setBorder(
           BorderFactory.createTitledBorder(
                                "Valores"));
    paneCentral.setLayout(new FlowLayout());
    paneCentral.add(campoX);
    paneCentral.add(valorX);
    paneCentral.add(branco);
    paneCentral.add(campoY);
    paneCentral.add(valorY);
    setContentPane(paneCentral);
      
    paneLista.setBorder(
          BorderFactory.createTitledBorder(
                              "Histórico"));
    paneLista.setLayout(new FlowLayout());

    JScrollPane jp=new JScrollPane(historico);
    jp.setPreferredSize(new Dimension(55,140));
    paneLista.add(jp);

    setContentPane(paneLista);
	
    paneMeio.setLayout(new BorderLayout());
    paneMeio.add(paneBotoesNorte,
                           BorderLayout.NORTH);
    paneMeio.add(paneCentral,
                          BorderLayout.CENTER);
    paneMeio.add(paneBotoesSul,
                           BorderLayout.SOUTH);
    setContentPane(paneMeio);

    paneGeral.setLayout(new BorderLayout());
    paneGeral.add(paneMeio,
                          BorderLayout.CENTER);
    paneGeral.add(paneLista,
                          BorderLayout.EAST);
    setContentPane(paneGeral);

    calculaMDC.
     addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e){
        x = Integer.parseInt(valorX.getText());
        y = Integer.parseInt(valorY.getText());
        if (grupoBotoes.getSelection() == calculaL) {
          Integer valorMDC = new Integer(Mdc.mdcL(x,y));
          modelo.addElement(valorMDC.toString());
        }
        else {
          Integer valorMDC = new Integer(Mdc.mdcR(x,y));
          modelo.addElement(valorMDC.toString());
        }
      }
    } );

    limpa.addActionListener(
      new ActionListener() {
        public void actionPerformed(ActionEvent e){
          valorX.setText("");
          valorY.setText("");
          modelo.removeAllElements();
      }
    });

  }//fim-contrutor

  /* Funcao main */
  public static void main(String[] arg) {
    JFrame minhaFrame = new MdcSwing();
    WindowListener l = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    minhaFrame.addWindowListener(l);
    minhaFrame.pack();
    minhaFrame.setVisible(true);
  }//fim-main

}//fim-classe Mdc