Fem: Use pyViewObject base member in getPyObject methods

src/Mod/Fem/Gui/ViewProviderFemMesh.cpp

@@ -596,11 +596,11 @@ void ViewProviderFemMesh::resetHighlightNodes()
 
 PyObject* ViewProviderFemMesh::getPyObject()
 {
-    if (PythonObject.is(Py::_None())) {
-        // ref counter is set to 1
-        PythonObject = Py::Object(new ViewProviderFemMeshPy(this), true);
+    if (!pyViewObject) {
+        pyViewObject = new ViewProviderFemMeshPy(this);
     }
-    return Py::new_reference_to(PythonObject);
+    pyViewObject->IncRef();
+    return pyViewObject;
 }
 
 void ViewProviderFemMesh::setDisplacementByNodeId(const std::map<long, Base::Vector3d>& NodeDispMap)

src/Mod/Fem/Gui/ViewProviderFemMesh.h

@@ -145,8 +145,6 @@ private:
     static App::PropertyFloatConstraint::Constraints floatRange;
     static const char* colorModeEnum[];
 
-    Py::Object PythonObject;
-
 protected:
     /// get called by the container whenever a property has been changed
     void onChanged(const App::Property* prop) override;

src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp

@@ -240,9 +240,9 @@ void ViewProviderFemPostPipeline::scaleField(vtkDataSet* dset,
 
 PyObject* ViewProviderFemPostPipeline::getPyObject()
 {
-    if (PythonObject.is(Py::_None())) {
-        // ref counter is set to 1
-        PythonObject = Py::Object(new ViewProviderFemPostPipelinePy(this), true);
+    if (!pyViewObject) {
+        pyViewObject = new ViewProviderFemPostPipelinePy(this);
     }
-    return Py::new_reference_to(PythonObject);
+    pyViewObject->IncRef();
+    return pyViewObject;
 }

src/Mod/Fem/Gui/ViewProviderFemPostPipeline.h

@@ -52,9 +52,6 @@ public:
     void scaleField(vtkDataSet* dset, vtkDataArray* pdata, double FieldFactor);
     PyObject* getPyObject() override;
 
-private:
-    Py::Object PythonObject;
-
 protected:
     void updateFunctionSize();
 };