serialize crosscorr item

GUI/Model/Sample/RoughnessItems.cpp

@@ -20,6 +20,7 @@ namespace Tag {
 
 const QString BaseData("BaseData");
 const QString HeightDistributionModel("HeightDistributionModel");
+const QString CrosscorrelationModel("CrosscorrelationModel");
 const QString Sigma("Sigma");
 const QString Hurst("Hurst");
 const QString LateralCorrelationLength("LateralCorrelationLength");
@@ -30,6 +31,7 @@ const QString LateralCorrelationLength("LateralCorrelationLength");
 void RoughnessItem::writeTo(QXmlStreamWriter* w) const
 {
     XML::writeTaggedElement(w, Tag::HeightDistributionModel, m_interlayer_model);
+    XML::writeTaggedElement(w, Tag::CrosscorrelationModel, m_crosscorr_model);
 }
 
 void RoughnessItem::readFrom(QXmlStreamReader* r)
@@ -39,6 +41,8 @@ void RoughnessItem::readFrom(QXmlStreamReader* r)
 
         if (tag == Tag::HeightDistributionModel)
             XML::readTaggedElement(r, tag, m_interlayer_model);
+        else if (tag == Tag::CrosscorrelationModel)
+            XML::readTaggedElement(r, tag, m_crosscorr_model);
         else
             r->skipCurrentElement();
     }