/**
  * Erstellt die zum Table Header Popup geh�renden Checkboxen
  *
  * @param ctrl Ben�tigte Referenz zum GUI Controller
  */
 public static void createColumnCheckBoxes(ViewController ctrl) {
   int count = ctrl.getTable(ctrl.getSelectedTab()).getModel().getColumnCount();
   columns = new JCheckBox[count];
   for (int i = 0; i < count; i++) {
     String columnName = ctrl.getTable(ctrl.getSelectedTab()).getModel().getColumnName(i);
     columns[i] = new JCheckBox(columnName);
     if (i == 0 || i == 1) {
       columns[i].setSelected(true);
       columns[i].setEnabled(false);
     }
     columns[i].addActionListener(ctrl);
     columns[i].setActionCommand("PopupCheckBox"); // $NON-NLS-1$
     columns[i].setFocusable(false);
   }
   updateCheckBoxes(ctrl);
 }
 /**
  * Statische Funktion welche das Popup f�r den Tabellenkopf erstellt und anzeigt.
  *
  * @param table Die Tabelle zu welcher das Popup geh�rt.
  * @param ctrl Ben�tigte Referenz zum GUI Controller
  * @param e Das MouseEvent welches das Popup �ffnet
  */
 public static void createTableHeaderPopup(JTable table, ViewController ctrl, MouseEvent e) {
   createColumnCheckBoxes(ctrl);
   if (menuPopUp != null) {
     menuPopUp.setVisible(false);
   }
   menuPopUp = new JPopupMenu();
   JMenu m_columns = new JMenu("Columns"); // $NON-NLS-1$
   JMenuItem mi_hide = new JMenuItem(Messages.getString("PopUpMenu.1")); // $NON-NLS-1$
   JMenuItem mi_showALL = new JMenuItem(Messages.getString("PopUpMenu.2")); // $NON-NLS-1$
   selectedColumn =
       ctrl.getTable(ctrl.getSelectedTab()).getColumnModel().getColumnIndexAtX(e.getX());
   if (ctrl.getUserInputData().getOriginalIndex(selectedColumn, ctrl.getSelectedTab()) == 0
       || ctrl.getUserInputData().getOriginalIndex(selectedColumn, ctrl.getSelectedTab()) == 1) {
     mi_hide.setEnabled(false);
   }
   mi_hide.addActionListener(ctrl);
   mi_hide.setActionCommand("hide"); // $NON-NLS-1$
   mi_showALL.addActionListener(ctrl);
   mi_showALL.setActionCommand("showall"); // $NON-NLS-1$
   menuPopUp.add(mi_hide);
   menuPopUp.add(m_columns);
   for (int x = 0; x < columns.length; x++) {
     m_columns.add(
         columns[ctrl.getUserInputData().getColumnOrder(ctrl.getSelectedTab()).get(x).intValue()]);
   }
   menuPopUp.add(mi_showALL);
   menuPopUp.show(table.getTableHeader(), e.getX(), e.getY());
 }