public ScaleMainFrame() {
    super(new BorderLayout());

    nameTF = new JTextField();
    JPanel top = new JPanel(new BorderLayout());
    top.add(new JLabel("Scale Name:"), BorderLayout.WEST);
    top.add(nameTF, BorderLayout.CENTER);

    PlayButton pb = new PlayButton("PLAY");
    tempoP = new IntSetPanel(1, 10000, "Tempo");
    tempoP.setValue(120);
    JPanel botL = new JPanel(new BorderLayout());
    botL.add(pb, BorderLayout.EAST);
    botL.add(tempoP, BorderLayout.CENTER);
    PianoKeyB kb = new PianoKeyB();
    kb.setPreferredSize(new Dimension(150, 40));
    // JPanel botTop = new JPanel(new GridLayout(1, 2));
    JPanel botTop = new JPanel(new FlowLayout());
    botTop.add(botL);
    botTop.add(kb);

    JButton newB = new JButton("New");
    saveB = new JButton("Save");
    JButton loadB = new JButton("Load");
    newB.addActionListener(this);
    saveB.addActionListener(this);
    loadB.addActionListener(this);
    pb.addActionListener(this);
    JPanel botBot = new JPanel(new GridLayout(1, 3));
    botBot.add(newB);
    botBot.add(saveB);
    botBot.add(loadB);
    JPanel bottom = new JPanel(new BorderLayout());
    bottom.add(botTop, BorderLayout.CENTER);
    bottom.add(botBot, BorderLayout.SOUTH);

    sp = new ScalePanel(this, kb);

    add(top, BorderLayout.NORTH);
    add(sp, BorderLayout.CENTER);
    add(bottom, BorderLayout.SOUTH);
    setPreferredSize(new Dimension(500, 300));

    fileChooser = new JFileChooser(new File("Features/Scales"));
    filter = new ScaleFilter();
    fileChooser.addChoosableFileFilter(filter);
    fileChooser.setFileFilter(filter);
  }
  public void actionPerformed(ActionEvent e) {
    JButton b = (JButton) e.getSource();
    if (b.getText() == "PLAY") {
      if (scoreP != null) scoreP.playScale(sp.getScale(), tempoP.getValue());
    } else if (b.getText() == "New") {
      try {
        saveUnsaved();
      } catch (SaveAbortedException ex) {
        return;
      }

      sp.notes.removeAllElements();
      sp.repaint();
      nameTF.setText("");
      loadedFile = null;
    } else if (b.getText() == "Save") {
      if (nameTF.getText().equals("")) {
        JOptionPane.showMessageDialog(
            this,
            new JLabel("Please type in the Scale Name"),
            "Warning",
            JOptionPane.WARNING_MESSAGE);
        return;
      }
      fileChooser.setFileFilter(filter);
      int option = fileChooser.showSaveDialog(this);
      if (option == JFileChooser.APPROVE_OPTION) {
        File target = fileChooser.getSelectedFile();
        if (target.getName().indexOf(".scl") == -1) target = new File(target.getPath() + ".scl");
        try {
          PrintStream stream = new PrintStream(new FileOutputStream(target), true);
          save(stream);
          stream.close();
        } catch (Exception ex) {
          JOptionPane.showMessageDialog(
              this, new JLabel("Error: " + ex.getMessage()), "Error", JOptionPane.ERROR_MESSAGE);
        }
      }
    } else if (b.getText() == "Load") {
      try {
        saveUnsaved();
      } catch (SaveAbortedException ex) {
        return;
      }

      fileChooser.setFileFilter(filter);
      int option = fileChooser.showOpenDialog(this);
      if (option == JFileChooser.APPROVE_OPTION) {
        loadedFile = fileChooser.getSelectedFile();
        SAXParserFactory factory = SAXParserFactory.newInstance();
        ScaleParser handler = new ScaleParser(false);
        try {
          SAXParser parser = factory.newSAXParser();
          parser.parse(loadedFile, handler);
          // System.out.println("success");
        } catch (Exception ex) {
          // System.out.println("no!!!!!! exception: "+e);
          // System.out.println(ex.getMessage());
          ex.printStackTrace();
        }
        // -----now :P:P---------------
        System.out.println("name: " + handler.getName());
        nameTF.setText(handler.getName());
        sp.notes.removeAllElements();
        int[] scale = handler.getScale();
        for (int i = 0; i < scale.length; i++) {
          sp.addNote(scale[i]);
        }
        sp.repaint();
      } else loadedFile = null;
    }
  }