ConvFit.cpp

    QtProperty* fprlbl = m_stringManager->addProperty("Fixed");
    fixedProp->addSubProperty(fprlbl);
    m_stringManager->setValue(fixedProp, prop->valueText());

    item->parent()->property()->addSubProperty(fixedProp);

    m_fixedProps[fixedProp] = prop;

    item->parent()->property()->removeSubProperty(prop);
  }

  void ConvFit::unFixItem()
  {
    QtBrowserItem* item = m_cfTree->currentItem();

    QtProperty* prop = item->property();
    if ( prop->subProperties().empty() )
    { 
      item = item->parent();
      prop = item->property();
    }

    item->parent()->property()->addSubProperty(m_fixedProps[prop]);
    item->parent()->property()->removeSubProperty(prop);
    m_fixedProps.remove(prop);
    QtProperty* proplbl = prop->subProperties()[0];
    delete proplbl;
    delete prop;
  }

  void ConvFit::showTieCheckbox(QString fitType)
  {
      uiForm().confit_ckTieCentres->setVisible( fitType == "Two Lorentzians" );
  }

} // namespace IDA
} // namespace CustomInterfaces
} // namespace MantidQt