#4664 Implement smoothing of WBS curves (#4809)

* Initial WIP

* Identical results with spreadsheet

* Improved and more robust smoothing by filtering points first

* Improved smoothing and more GUI

* Include mixed-label for smoothing threshold

ApplicationCode/ProjectDataModel/RimWellLogWbsCurve.h

@@ -0,0 +1,49 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2019-     Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+#pragma once
+
+#include "RimWellLogExtractionCurve.h"
+
+//==================================================================================================
+///
+///
+//==================================================================================================
+class RimWellLogWbsCurve : public RimWellLogExtractionCurve
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    RimWellLogWbsCurve();
+
+    bool   smoothCurve() const;
+    double smoothingThreshold() const;
+
+    void setSmoothCurve( bool smooth );
+    void setSmoothingThreshold( double threshold );
+
+protected:
+    void performDataExtraction( bool* isUsingPseudoLength ) override;
+    void defineUiOrdering( QString uiConfigName, caf::PdmUiOrdering& uiOrdering ) override;
+    void fieldChangedByUi( const caf::PdmFieldHandle* changedField,
+                           const QVariant&            oldValue,
+                           const QVariant&            newValue ) override;
+
+protected:
+    caf::PdmField<bool>   m_smoothCurve;
+    caf::PdmField<double> m_smoothingThreshold;
+};