Fix export increments and preview calculations.

Separate both types. First write increments then preview calculations.

--HG--
branch : feature

src/app/valentina/mainwindow.cpp

@@ -1499,16 +1499,23 @@ void MainWindow::ExportToCSVData(const QString &fileName, const DialogExportToCS
     }
 
     const QMap<QString, QSharedPointer<VIncrement> > increments = pattern->DataIncrements();
+
+    qint32 currentRow = -1;
+
+    auto SavePreviewCalculation = [&currentRow, &csv, increments](bool save)
+    {
         QMap<QString, QSharedPointer<VIncrement> >::const_iterator i;
         QMap<quint32, QString> map;
         //Sorting QHash by id
         for (i = increments.constBegin(); i != increments.constEnd(); ++i)
         {
-        QSharedPointer<VIncrement> incr = i.value();
+            const QSharedPointer<VIncrement> incr = i.value();
+            if (incr->IsPreviewCalculation() == save)
+            {
                 map.insert(incr->getIndex(), i.key());
             }
+        }
 
-    qint32 currentRow = -1;
         QMapIterator<quint32, QString> iMap(map);
         while (iMap.hasNext())
         {
@@ -1520,9 +1527,14 @@ void MainWindow::ExportToCSVData(const QString &fileName, const DialogExportToCS
             csv.setText(currentRow, 0, incr->GetName()); // name
             csv.setText(currentRow, 1, qApp->LocaleToString(*incr->GetValue())); // calculated value
 
-        QString formula = VTranslateVars::TryFormulaToUser(incr->GetFormula(), qApp->Settings()->GetOsSeparator());
+            QString formula = VTranslateVars::TryFormulaToUser(incr->GetFormula(),
+                                                               qApp->Settings()->GetOsSeparator());
             csv.setText(currentRow, 2, formula); // formula
         }
+    };
+
+    SavePreviewCalculation(false);
+    SavePreviewCalculation(true);
 
     csv.toCSV(fileName, dialog.WithHeader(), dialog.Separator(), QTextCodec::codecForMib(dialog.SelectedMib()));
 }

src/libs/vpatterndb/variables/vincrement.cpp

@@ -80,7 +80,8 @@ VIncrement::~VIncrement()
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
- * @brief getIndex return index of row
+ * @brief getIndex return index of row. Row index for increments and preview calucalations is unique. Check type before
+ * using.
  * @return index
  */
 quint32 VIncrement::getIndex() const