public boolean editCellAt(int index, EventObject e) {
    if (editor != null && !editor.stopCellEditing()) return false;

    if (index < 0 || index >= getModel().getSize()) return false;

    if (!isCellEditable(index)) return false;

    if (editorRemover == null) {
      KeyboardFocusManager fm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
      editorRemover = new CellEditorRemover(fm);
      fm.addPropertyChangeListener("permanentFocusOwner", editorRemover); // NOI18N
    }

    if (editor != null && editor.isCellEditable(e)) {
      editorComp = prepareEditor(index);
      if (editorComp == null) {
        removeEditor();
        return false;
      }
      editorComp.setBounds(getCellBounds(index, index));
      add(editorComp);
      editorComp.validate();

      editingIndex = index;
      editor.addCellEditorListener(this);

      return true;
    }
    return false;
  }