/**
   * Closes dialog box when the OK button is pressed and calls the algorithm.
   *
   * @param event Event that triggers function.
   */
  public void actionPerformed(ActionEvent event) {
    String command = event.getActionCommand();
    Object source = event.getSource();

    if (command.equals("OK")) {

      if (setVariables()) {
        callAlgorithm();
      }
    } else if (command.equals("Script")) {
      callAlgorithm();
    } else if (command.equals("Cancel")) {
      dispose();
    } else if (source == blueSmoothBox) {
      if (blueSmoothBox.isSelected()) {
        interpolationLabel.setEnabled(true);
        interpolationText.setEnabled(true);
      } else {
        interpolationLabel.setEnabled(false);
        interpolationText.setEnabled(false);
      }
    } else {
      super.actionPerformed(event);
    }
  }
  /** Sets up the GUI (panels, buttons, etc) and displays it on the screen. */
  private void init() {
    DecimalFormat df;
    int xUnits;
    String unitStr;
    String distStr;
    setForeground(Color.black);
    setTitle("Center Distances version 2  07/14/08");

    df = new DecimalFormat("0.000E0");

    GridBagConstraints gbc = new GridBagConstraints();
    int yPos = 0;
    gbc.gridwidth = 1;
    gbc.gridheight = 1;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.weightx = 1;
    gbc.insets = new Insets(3, 3, 3, 3);
    gbc.fill = GridBagConstraints.HORIZONTAL;
    gbc.gridx = 0;
    gbc.gridy = yPos++;

    JPanel mainPanel = new JPanel(new GridBagLayout());
    mainPanel.setForeground(Color.black);
    mainPanel.setBorder(buildTitledBorder("Input parameters"));

    blueMinLabel = new JLabel("Minimum number of blue pixels per nucleus");
    blueMinLabel.setForeground(Color.black);
    blueMinLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(blueMinLabel, gbc);

    blueMinText = new JTextField(5);
    if (image.getNDims() == 2) {
      blueMinText.setText("1000");
    } else {
      blueMinText.setText("20000");
    }
    blueMinText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(blueMinText, gbc);

    redMinLabel = new JLabel("Minimum red pixel count");
    redMinLabel.setForeground(Color.black);
    redMinLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(redMinLabel, gbc);

    redMinText = new JTextField(5);
    redMinText.setText("50");
    redMinText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(redMinText, gbc);

    redFractionLabel = new JLabel("Fraction of red pixels to consider");
    redFractionLabel.setForeground(Color.black);
    redFractionLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(redFractionLabel, gbc);

    redFractionText = new JTextField(5);
    redFractionText.setText("0.15");
    redFractionText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(redFractionText, gbc);

    xUnits = image.getFileInfo(0).getUnitsOfMeasure()[0];
    if (xUnits != Unit.UNKNOWN_MEASURE.getLegacyNum()) {
      unitStr = (Unit.getUnitFromLegacyNum(xUnits)).toString();
      greenMergingLabel = new JLabel("Green merging radius around peak (" + unitStr + ")");
    } else {
      greenMergingLabel = new JLabel("Green merging radius around peak");
    }
    greenMergingLabel.setForeground(Color.black);
    greenMergingLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(greenMergingLabel, gbc);

    if (image.getNDims() == 2) {
      // mergingDistance = 8.0f * image.getFileInfo(0).getResolutions()[0];
      mergingDistance = 0.0f;
    } else {
      // mergingDistance = 4.0f * image.getFileInfo(0).getResolutions()[0];
      mergingDistance = 0.0f;
    }
    distStr = df.format(mergingDistance);
    greenMergingText = new JTextField(10);
    greenMergingText.setText(distStr);
    greenMergingText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(greenMergingText, gbc);

    greenMinLabel = new JLabel("Minimum green pixel count");
    greenMinLabel.setForeground(Color.black);
    greenMinLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(greenMinLabel, gbc);

    greenMinText = new JTextField(5);
    greenMinText.setText("10");
    greenMinText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(greenMinText, gbc);

    greenFractionLabel = new JLabel("Fraction of green pixels to consider");
    greenFractionLabel.setForeground(Color.black);
    greenFractionLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(greenFractionLabel, gbc);

    greenFractionText = new JTextField(5);
    greenFractionText.setText("0.01");
    greenFractionText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(greenFractionText, gbc);

    greenRegionsLabel = new JLabel("Green regions per cell");
    greenRegionsLabel.setForeground(Color.black);
    greenRegionsLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(greenRegionsLabel, gbc);

    JPanel buttonPanel = new JPanel(new GridBagLayout());

    greenGroup = new ButtonGroup();

    oneButton = new JRadioButton("1", false);
    oneButton.setForeground(Color.black);
    oneButton.setFont(serif12);
    greenGroup.add(oneButton);
    gbc.gridx = 0;
    gbc.gridy = 0;
    buttonPanel.add(oneButton, gbc);

    twoButton = new JRadioButton("2", true);
    twoButton.setForeground(Color.black);
    twoButton.setFont(serif12);
    greenGroup.add(twoButton);
    gbc.gridx = 1;
    gbc.gridy = 0;
    buttonPanel.add(twoButton, gbc);

    threeButton = new JRadioButton("3", false);
    threeButton.setForeground(Color.black);
    threeButton.setFont(serif12);
    greenGroup.add(threeButton);
    gbc.gridx = 2;
    gbc.gridy = 0;
    buttonPanel.add(threeButton, gbc);

    fourButton = new JRadioButton("4", false);
    fourButton.setForeground(Color.black);
    fourButton.setFont(serif12);
    greenGroup.add(fourButton);
    gbc.gridx = 3;
    gbc.gridy = 0;
    buttonPanel.add(fourButton, gbc);

    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(buttonPanel, gbc);

    twoBox = new JCheckBox("Use 2 top gray levels in green segmentation", true);
    twoBox.setForeground(Color.black);
    twoBox.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos++;
    mainPanel.add(twoBox, gbc);

    blueValueLabel =
        new JLabel("Fraction of blue transition from image min to max at nucleus boundary");
    blueValueLabel.setForeground(Color.black);
    blueValueLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(blueValueLabel, gbc);

    blueValueText = new JTextField(5);
    blueValueText.setText("0.15");
    blueValueText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(blueValueText, gbc);

    blueSmoothBox = new JCheckBox("Smooth blue VOI contours with AlgorithmBSmooth", true);
    blueSmoothBox.setForeground(Color.black);
    blueSmoothBox.setFont(serif12);
    blueSmoothBox.addActionListener(this);
    gbc.gridx = 0;
    gbc.gridy = yPos++;
    mainPanel.add(blueSmoothBox, gbc);

    interpolationLabel = new JLabel("Number of interpolation points determined by divisor (> 1.0)");
    interpolationLabel.setForeground(Color.black);
    interpolationLabel.setFont(serif12);
    gbc.gridx = 0;
    gbc.gridy = yPos;
    mainPanel.add(interpolationLabel, gbc);

    interpolationText = new JTextField(5);
    interpolationText.setText("24.0");
    interpolationText.setFont(serif12);
    gbc.gridx = 1;
    gbc.gridy = yPos++;
    mainPanel.add(interpolationText, gbc);

    getContentPane().add(mainPanel, BorderLayout.CENTER);
    getContentPane().add(buildButtons(), BorderLayout.SOUTH);

    pack();
    setVisible(true);
    setResizable(false);
    System.gc();
  } // end init()