/**
   * Adds the specified files to the list of import data.
   *
   * @param files The files to import.
   */
  private void insertFiles(Map<File, StatusLabel> files) {
    if (files == null || files.size() == 0) {
      statusLabel.setText("No files to import.");
      return;
    }
    components = new HashMap<File, FileImportComponent>();
    totalFiles = files.size();
    String text = "Importing " + totalFiles + " file";
    if (totalFiles > 1) text += "s";
    statusLabel.setText(text);

    Entry entry;
    Iterator i = files.entrySet().iterator();
    FileImportComponent c;
    JPanel p = new JPanel();
    p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
    int index = 0;
    p.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    File f;
    DatasetData d = dataset;
    Object node = refNode;
    if (folderAsContainer) {
      node = null;
      d = new DatasetData();
      d.setName(file.getName());
    }
    while (i.hasNext()) {
      entry = (Entry) i.next();
      f = (File) entry.getKey();
      c = new FileImportComponent(f, folderAsContainer, browsable, group, singleGroup);
      if (f.isFile()) {
        c.setLocation(data, d, node);
        c.setParent(this);
      }
      c.showContainerLabel(showContainerLabel);
      c.setType(getType());
      attachListeners(c);
      c.setStatusLabel((StatusLabel) entry.getValue());
      if (index % 2 == 0) c.setBackground(UIUtilities.BACKGROUND_COLOUR_EVEN);
      else c.setBackground(UIUtilities.BACKGROUND_COLOUR_ODD);
      components.put((File) entry.getKey(), c);
      p.add(c);
      index++;
    }
    removeAll();
    pane = EditorUtil.createTaskPane("");
    pane.setCollapsed(false);
    setNumberOfImport();

    IconManager icons = IconManager.getInstance();
    pane.setIcon(icons.getIcon(IconManager.DIRECTORY));
    Font font = pane.getFont();
    pane.setFont(font.deriveFont(font.getStyle(), font.getSize() - 2));
    pane.add(p);
    double[][] size = {{TableLayout.FILL}, {TableLayout.PREFERRED}};
    setLayout(new TableLayout(size));
    add(pane, "0, 0");
    validate();
    repaint();
  }
 /** Increases the number of imports. */
 void increaseNumberOfImport() {
   importCount++;
   setNumberOfImport();
 }