void SelectionDelegate::initStructure(GLWidget *widget, ProjectTreeItem *parent)
  {
    // save the widget
    m_widget = widget;

    // add the labels
    m_label = insertExpandableItem(parent);
    m_label->setData(0, alias());
  }
 void LabelDelegate::initStructure(GLWidget *, ProjectTreeItem *parent)
 {
   // add the label
   m_label = insertExpandableItem(parent);
   m_label->setData(0, alias());
 }