void createFrame() {
    /* see Preferences.java */
    int GUI_BIG = 13;
    int GUI_BETWEEN = 10;
    int GUI_SMALL = 6;
    int FIELD_SIZE = 30;

    int left = GUI_BIG;
    int top = GUI_BIG;
    int right = 0;

    Dimension d;

    frame = new JFrame("Directives Editor");
    Container pane = frame.getContentPane();
    pane.setLayout(null);

    JLabel label = new JLabel("Click here to read about directives.");
    label.addMouseListener(
        new MouseListener() {
          public void mouseClicked(MouseEvent e) {
            Base.openURL("http://processingjs.org/reference/pjs%20directive");
          }

          public void mouseEntered(MouseEvent e) {}

          public void mouseExited(MouseEvent e) {}

          public void mousePressed(MouseEvent e) {}

          public void mouseReleased(MouseEvent e) {}
        });
    pane.add(label);
    d = label.getPreferredSize();
    label.setBounds(left, top, d.width, d.height);
    top += d.height + GUI_BETWEEN + GUI_BETWEEN;

    // CRISP

    crispBox = new JCheckBox("\"crisp\": disable antialiasing for line(), triangle() and rect()");
    pane.add(crispBox);
    d = crispBox.getPreferredSize();
    crispBox.setBounds(left, top, d.width + 10, d.height);
    right = Math.max(right, left + d.width);
    top += d.height + GUI_BETWEEN;

    // FONTS

    label = new JLabel("\"font\": to load (comma separated)");
    pane.add(label);
    d = label.getPreferredSize();
    label.setBounds(left, top, d.width, d.height);
    top += d.height + GUI_SMALL;

    fontField = new JTextField(FIELD_SIZE);
    pane.add(fontField);
    d = fontField.getPreferredSize();
    fontField.setBounds(left, top, d.width, d.height);

    JButton button = new JButton("scan");
    button.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            handleScanFonts();
          }
        });
    pane.add(button);
    Dimension d2 = button.getPreferredSize();
    button.setBounds(left + d.width + GUI_SMALL, top, d2.width, d2.height);
    right = Math.max(right, left + d.width + GUI_SMALL + d2.width);
    top += d.height + GUI_BETWEEN;

    // GLOBAL_KEY_EVENTS

    globalKeyEventsBox = new JCheckBox("\"globalKeyEvents\": receive global key events");
    pane.add(globalKeyEventsBox);
    d = globalKeyEventsBox.getPreferredSize();
    globalKeyEventsBox.setBounds(left, top, d.width + 10, d.height);
    right = Math.max(right, left + d.width);
    top += d.height + GUI_BETWEEN;

    // PAUSE_ON_BLUR

    pauseOnBlurBox = new JCheckBox("\"pauseOnBlur\": pause if applet loses focus");
    pane.add(pauseOnBlurBox);
    d = pauseOnBlurBox.getPreferredSize();
    pauseOnBlurBox.setBounds(left, top, d.width + 10, d.height);
    right = Math.max(right, left + d.width);
    top += d.height + GUI_BETWEEN;

    // PRELOAD images

    label = new JLabel("\"preload\": images (comma separated)");
    pane.add(label);
    d = label.getPreferredSize();
    label.setBounds(left, top, d.width, d.height);
    top += d.height + GUI_SMALL;

    preloadField = new JTextField(FIELD_SIZE);
    pane.add(preloadField);
    d = preloadField.getPreferredSize();
    preloadField.setBounds(left, top, d.width, d.height);

    button = new JButton("scan");
    button.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            handleScanImages();
          }
        });
    pane.add(button);
    d2 = button.getPreferredSize();
    button.setBounds(left + d.width + GUI_SMALL, top, d2.width, d2.height);
    right = Math.max(right, left + d.width + GUI_SMALL + d2.width);
    top += d.height + GUI_BETWEEN;

    // TRANSPARENT

    /*transparentBox =
         new JCheckBox("\"transparent\": set applet background to be transparent");
       pane.add(transparentBox);
    d = transparentBox.getPreferredSize();
       transparentBox.setBounds(left, top, d.width + 10, d.height);
       right = Math.max(right, left + d.width);
       top += d.height + GUI_BETWEEN;*/

    // APPLY / OK

    button = new JButton("OK");
    button.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            applyDirectives();
            hide();
          }
        });
    pane.add(button);
    d2 = button.getPreferredSize();
    int BUTTON_HEIGHT = d2.height;
    int BUTTON_WIDTH = 80;

    int h = right - (BUTTON_WIDTH + GUI_SMALL + BUTTON_WIDTH);
    button.setBounds(h, top, BUTTON_WIDTH, BUTTON_HEIGHT);
    h += BUTTON_WIDTH + GUI_SMALL;

    button = new JButton("Cancel");
    button.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            hide();
          }
        });
    pane.add(button);
    button.setBounds(h, top, BUTTON_WIDTH, BUTTON_HEIGHT);

    top += BUTTON_HEIGHT + GUI_BETWEEN;

    // frame.getContentPane().add(box);
    frame.pack();
    Insets insets = frame.getInsets();
    frame.setSize(
        right + GUI_BIG + insets.left + insets.right, top + GUI_SMALL + insets.top + insets.bottom);

    // frame.setResizable(false);

    frame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
    frame.addWindowListener(
        new WindowAdapter() {
          public void windowClosing(WindowEvent e) {
            frame.setVisible(false);
          }
        });
    Toolkit.registerWindowCloseKeys(
        frame.getRootPane(),
        new ActionListener() {
          public void actionPerformed(ActionEvent actionEvent) {
            frame.setVisible(false);
          }
        });
    Toolkit.setIcon(frame);
  }