From f8ea158a339874b450d687c3d30eff3ace7ef643 Mon Sep 17 00:00:00 2001
From: asozinov <alexey.sozinov@opencascade.com>
Date: Thu, 17 Oct 2024 15:40:19 +0100
Subject: [PATCH] Managing group during reload mesh

---
 src/SMESHGUI/SMESHGUI.cxx   | 20 ++++++++++++++++++--
 src/SMESH_I/SMESH_Gen_i.cxx |  7 +++++++
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/SMESHGUI/SMESHGUI.cxx b/src/SMESHGUI/SMESHGUI.cxx
index aff8bf130..88551499b 100644
--- a/src/SMESHGUI/SMESHGUI.cxx
+++ b/src/SMESHGUI/SMESHGUI.cxx
@@ -1115,12 +1115,28 @@ namespace
       }
 
       SMESH::SMESH_Mesh_var aMeshByIO = SMESH::GetMeshByIO(anIObject);
-
       SMESH::SelectionProxy aMesh = SMESH::SelectionProxy(aMeshItem);
       SMESH::MedInfo anInfo = aMesh.medFileInfo();
       if (!anInfo.isValid())
         continue;
 
+      SMESH::ListOfGroups aGroups = *aMeshByIO->GetGroups();
+      for (int i = 0; i < aGroups.length(); ++i)
+      {
+        auto X = aGroups[i];
+        _PTR(SObject) aGroupSObject = SMESH::FindSObject(X);
+        SMESH_Actor* anActor = SMESH::FindActorByEntry(aGroupSObject->GetID().c_str());
+        SMESH::smIdType_array aMeshInfo = *X->GetMeshInfo();
+        
+        if (anActor)
+        {
+          vtkTypeBool isVisib = anActor->GetVisibility();
+          SMESH::UpdateView(!isVisib ? SMESH::eDisplay : SMESH::eErase, aGroupSObject->GetID().c_str());
+        }
+        else
+          SMESH::UpdateView(SMESH::eErase, aGroupSObject->GetID().c_str());
+      }
+
       SMESH::mesh_array_var aMeshes = new SMESH::mesh_array;
       {
         // re-import mesh
@@ -1138,7 +1154,7 @@ namespace
           anApp->browseObjects(anEntryList);
       }
 
-      SMESH::SMESH_GroupBase_var aGroup = SMESH::SMESH_GroupBase::_narrow(aMeshItem);\
+      SMESH::SMESH_GroupBase_var aGroup = SMESH::SMESH_GroupBase::_narrow(aMeshItem);
       QString aMeshName = anIObject->getName();
       aMeshList.append(QPair< SMESH::SMESH_IDSource_var, QString >(aMeshItem, aMeshName));
 
diff --git a/src/SMESH_I/SMESH_Gen_i.cxx b/src/SMESH_I/SMESH_Gen_i.cxx
index 57d4b1c17..83d343800 100644
--- a/src/SMESH_I/SMESH_Gen_i.cxx
+++ b/src/SMESH_I/SMESH_Gen_i.cxx
@@ -1603,6 +1603,7 @@ SMESH::mesh_array* SMESH_Gen_i::CreateMeshesFromMED( const char*
 
 SMESH::mesh_array* SMESH_Gen_i::ReloadMeshesFromMED(const char* theFileName, SMESH::SMESH_Mesh_ptr sourceMesh, SMESH::DriverMED_ReadStatus& theStatus)
 {
+  SMESH::ListOfGroups anOldGroups = *sourceMesh->GetGroups();
   checkFileReadable(theFileName);
 
 #ifdef WIN32
@@ -1663,7 +1664,13 @@ SMESH::mesh_array* SMESH_Gen_i::ReloadMeshesFromMED(const char* theFileName, SME
         if (status1 > theStatus)
           theStatus = status1;
 
+        for (int i = 0; i < anOldGroups.length(); ++i)
+        {
+          //auto X = anOldGroups[i];
+          sourceMesh->RemoveGroup(anOldGroups[i]);
+        }
         aResult[i++] = SMESH::SMESH_Mesh::_duplicate(sourceMesh);
+
         meshServant->GetImpl().GetMeshDS()->Modified();
       }
       if (!aStudyBuilder->_is_nil())
-- 
2.39.2