[FEM] fix pipeline recompute issue

- after a simulation was run, the pipelines and its childs are recomputed but its shape coloring is not updated.

- also update XML documentation
- also remove comment in tasks.py for now

src/Mod/Fem/Gui/ViewProviderFemPostObject.h

@@ -95,8 +95,10 @@ public:
 
     virtual SoSeparator* getFrontRoot(void) const;
 
-    //observer for the color bar
+    // observer for the color bar
     virtual void OnChange(Base::Subject< int >& rCaller, int rcReason);
+    // update color bar
+    void updateMaterial();
 
     // handling when object is deleted
     virtual bool onDelete(const std::vector<std::string>&);
@@ -123,7 +125,6 @@ protected:
     bool setupPipeline();
     void updateVtk();
     void setRangeOfColorBar(double min, double max);
-    void updateMaterial();
 
     SoCoordinate3*              m_coordinates;
     SoIndexedPointSet*          m_markers;

src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp

@@ -129,6 +129,25 @@ void ViewProviderFemPostPipeline::onSelectionChanged(const Gui::SelectionChanges
     }
 }
 
+void ViewProviderFemPostPipeline::updateColorBars()
+{
+    
+    // take all visible childs and update its shape coloring
+    auto children = claimChildren();
+    for (auto& child : children) {
+        if (child->Visibility.getValue()) {
+            auto vpObject = dynamic_cast<FemGui::ViewProviderFemPostObject *>(
+                Gui::Application::Instance->getViewProvider(child));
+            if (vpObject)
+                vpObject->updateMaterial();
+        }
+    }
+
+    // if pipeline is visible, update it
+    if (this->isVisible())
+        updateMaterial();
+}
+
 void ViewProviderFemPostPipeline::transformField(char *FieldName, double FieldFactor)
 {
     Fem::FemPostPipeline *obj = static_cast<Fem::FemPostPipeline *>(getObject());

src/Mod/Fem/Gui/ViewProviderFemPostPipeline.h

@@ -44,6 +44,7 @@ public:
     virtual std::vector< App::DocumentObject* > claimChildren3D(void) const;
     virtual void updateData(const App::Property* prop);
     virtual void onSelectionChanged(const Gui::SelectionChanges &sel);
+    void updateColorBars();
     void transformField(char *FieldName, double FieldFactor);
     void scaleField(vtkDataSet *dset, vtkDataArray *pdata, double FieldFactor);
     PyObject *getPyObject();

src/Mod/Fem/Gui/ViewProviderFemPostPipelinePy.xml

@@ -1,24 +1,29 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <GenerateModel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="generateMetaModel_Module.xsd">
-    <PythonExport
-            Father="ViewProviderDocumentObjectPy"
-            Name="ViewProviderFemPostPipelinePy"
-            Twin="ViewProviderFemPostPipeline"
-            TwinPointer="ViewProviderFemPostPipeline"
-            Include="Mod/Fem/Gui/ViewProviderFemPostPipeline.h"
-            Namespace="FemGui"
-            FatherInclude="Gui/ViewProviderDocumentObjectPy.h"
-            FatherNamespace="Gui"
-            Constructor="false"
-            Delete="false">
-        <Documentation>
-            <Author Licence="LGPL" Name="Uwe Stöhr" EMail="uwestoehr@lyx.org" />
-            <UserDocu>ViewProviderFemPostPipeline class</UserDocu>
-        </Documentation>
-        <Methode Name="transformField">
-          <Documentation>
-            <UserDocu></UserDocu>
-          </Documentation>
-        </Methode>
-    </PythonExport>
+  <PythonExport
+          Father="ViewProviderDocumentObjectPy"
+          Name="ViewProviderFemPostPipelinePy"
+          Twin="ViewProviderFemPostPipeline"
+          TwinPointer="ViewProviderFemPostPipeline"
+          Include="Mod/Fem/Gui/ViewProviderFemPostPipeline.h"
+          Namespace="FemGui"
+          FatherInclude="Gui/ViewProviderDocumentObjectPy.h"
+          FatherNamespace="Gui"
+          Constructor="false"
+          Delete="false">
+    <Documentation>
+      <Author Licence="LGPL" Name="Uwe Stöhr" EMail="uwestoehr@lyx.org" />
+      <UserDocu>ViewProviderFemPostPipeline class</UserDocu>
+    </Documentation>
+    <Methode Name="transformField">
+      <Documentation>
+        <UserDocu>Scales values of given result mesh field by given factor</UserDocu>
+      </Documentation>
+    </Methode>
+    <Methode Name="updateColorBars">
+      <Documentation>
+        <UserDocu>Update coloring of pipeline and its childs</UserDocu>
+      </Documentation>
+    </Methode>
+  </PythonExport>
 </GenerateModel>

src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp

@@ -40,6 +40,16 @@ std::string ViewProviderFemPostPipelinePy::representation(void) const
     return std::string("<ViewProviderFemPostPipeline object>");
 }
 
+PyObject *ViewProviderFemPostPipelinePy::updateColorBars(PyObject *args)
+{
+    if (!PyArg_ParseTuple(args, ""))
+        return nullptr;
+
+    this->getViewProviderFemPostPipelinePtr()->updateColorBars();
+
+    Py_Return;
+}
+
 PyObject *ViewProviderFemPostPipelinePy::transformField(PyObject *args)
 {
     char *FieldName;

src/Mod/Fem/femsolver/elmer/tasks.py

@@ -256,12 +256,11 @@ class Results(run.Results):
         # this might be changed in future, therefore leave this
         # self.solver.ElmerResult.scale(1000)
 
-        # it might be necessary to scale some result fields
-        # this would be done by this call:
-        # self.solver.ElmerResult.ViewObject.transformField("displacement EigenMode1", 0.001)
-
         self.solver.ElmerResult.recomputeChildren()
         self.solver.Document.recompute()
+        # recompute() updated the result mesh data
+        # but not the shape and bar coloring
+        self.solver.ElmerResult.ViewObject.updateColorBars()
 
     def _createResults(self):
         self.solver.ElmerResult = self.analysis.Document.addObject(