import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.*;

public class ButtonsNText extends JPanel {

   JTextField TextLine = new JTextField();

   ButtonGroup group = new ButtonGroup();
   JToggleButton UpperCaseButton = new JToggleButton("Upper case");
   JToggleButton LowerCaseButton = new JToggleButton("Lower case");

   JCheckBox ContinuousButton = new JCheckBox("Continous");

   public ButtonsNText() {

      TextLine.setPreferredSize(new Dimension(250,25));

      group.add(UpperCaseButton);
      group.add(LowerCaseButton);


      this.add(TextLine);
      this.add(UpperCaseButton);
      this.add(LowerCaseButton);
      this.add(ContinuousButton);

      TextLine.addKeyListener(new TextLineListener());
      UpperCaseButton.addActionListener(new ButtonListener());
      LowerCaseButton.addActionListener(new ButtonListener());

   }

   private class TextLineListener implements KeyListener {
      public void keyPressed(KeyEvent e) {
      }
      public void keyReleased(KeyEvent e) {
         if(ContinuousButton.isSelected()){
            if(UpperCaseButton.isSelected()){
               TextLine.setText(TextLine.getText().toUpperCase());
            }else{
               TextLine.setText(TextLine.getText().toLowerCase());
            }
         }
      }
      public void keyTyped(KeyEvent e) {
      }
   }



   private class ButtonListener implements ActionListener {
      public void actionPerformed(ActionEvent e) {
         if(UpperCaseButton.isSelected()){
            TextLine.setText(TextLine.getText().toLowerCase());
         }else{
            TextLine.setText(TextLine.getText().toUpperCase());
         }
      }

   }


   public static void main(String[] args) {

      JFrame frame = new JFrame("MMI Oppgave 1");
      frame.setContentPane(new ButtonsNText());
      frame.pack();
      frame.setVisible(true);

   }

}