FileBrowser.java

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

public class FileBrowser extends JPanel implements ActionListener {

  JLabel label = new JLabel("File List");
  JButton newFile = new JButton("New File");
  JButton open = new JButton("Open");
  JTextField newFileTF = new JTextField(10);
  ButtonGroup bg;
  File directory;

  public FileBrowser(String dir) {
    directory = new File(dir);
    directory.mkdir();
    JPanel fileList = new JPanel(new GridLayout(directory.listFiles().length + 3, 1));
    fileList.add(label);
    bg = new ButtonGroup();
    for(File file : directory.listFiles()) {
      JRadioButton radio = new JRadioButton(file.getName());
      radio.setActionCommand(file.getName());
      bg.add(radio);
      fileList.add(radio);
    }
    JPanel newP = new JPanel();
    newP.add(newFileTF);
    newP.add(newFile);
    newFile.addActionListener(this);
    open.addActionListener(this);
    fileList.add(open);
    fileList.add(newP);
    add(fileList);
  }

  @Override
  public void actionPerformed(ActionEvent e) {
    Login login = (Login) getParent();
    if(e.getSource() == open) {
      login.add(new Editor(directory.getName() + "/" + bg.getSelection().getActionCommand()), "editor");
      login.cl.show(login, "editor");
    }
    if(e.getSource() == newFile) {
      String file = directory.getName() + "/" + newFileTF.getText() + ".txt";
      if(newFileTF.getText().length() > 0 && !(new File(file).exists())) {
        login.add(new Editor(file), "editor");
        login.cl.show(login, "editor");
      }
    }
  }
}