From d018b3f8fbd44531311133f0415cdce03e726fd1 Mon Sep 17 00:00:00 2001
From: marioalexis <mario.passaglia@gmail.com>
Date: Wed, 29 Oct 2025 00:38:41 -0300
Subject: [PATCH] Fem: Add method to rename mesh group

---
 src/Mod/Fem/App/FemMesh.cpp      |  8 ++++++++
 src/Mod/Fem/App/FemMesh.h        |  2 ++
 src/Mod/Fem/App/FemMesh.pyi      |  8 ++++++++
 src/Mod/Fem/App/FemMeshPyImp.cpp | 12 ++++++++++++
 4 files changed, 30 insertions(+)

diff --git a/src/Mod/Fem/App/FemMesh.cpp b/src/Mod/Fem/App/FemMesh.cpp
index 52e0ed8fa0..4a493c0d04 100644
--- a/src/Mod/Fem/App/FemMesh.cpp
+++ b/src/Mod/Fem/App/FemMesh.cpp
@@ -2705,3 +2705,11 @@ bool FemMesh::removeGroup(int GroupId)
 {
     return this->getSMesh()->RemoveGroup(GroupId);
 }
+
+void FemMesh::renameGroup(int id, const std::string& name)
+{
+    SMESH_Group* grp = this->getSMesh()->GetGroup(id);
+    if (grp) {
+        grp->SetName(name.c_str());
+    }
+}
diff --git a/src/Mod/Fem/App/FemMesh.h b/src/Mod/Fem/App/FemMesh.h
index af79553857..3edc6a1a17 100644
--- a/src/Mod/Fem/App/FemMesh.h
+++ b/src/Mod/Fem/App/FemMesh.h
@@ -180,6 +180,8 @@ public:
     void addGroupElements(int, const std::set<int>&);
     /// Remove group (Name due to similarity to SMESH basis functions)
     bool removeGroup(int);
+    /// Rename group
+    void renameGroup(int id, const std::string& name);
     //@}
 
 
diff --git a/src/Mod/Fem/App/FemMesh.pyi b/src/Mod/Fem/App/FemMesh.pyi
index 04f2fa8f3b..c48dec78c6 100644
--- a/src/Mod/Fem/App/FemMesh.pyi
+++ b/src/Mod/Fem/App/FemMesh.pyi
@@ -239,6 +239,14 @@ class FemMesh(ComplexGeoData):
                             Returns boolean."""
         ...
 
+    @constmethod
+    def renameGroup(self) -> Any:
+        """Rename a group with a given group ID
+        renameGroup(id, name)
+        groupid: int
+        name: string"""
+        ...
+
     @constmethod
     def getElementType(self) -> Any:
         """Return the element type of a given ID"""
diff --git a/src/Mod/Fem/App/FemMeshPyImp.cpp b/src/Mod/Fem/App/FemMeshPyImp.cpp
index c4450193b4..bfb923ebc7 100644
--- a/src/Mod/Fem/App/FemMeshPyImp.cpp
+++ b/src/Mod/Fem/App/FemMeshPyImp.cpp
@@ -1718,6 +1718,18 @@ PyObject* FemMeshPy::removeGroup(PyObject* args) const
     return PyBool_FromLong((long)(getFemMeshPtr()->removeGroup(theId)));
 }
 
+PyObject* FemMeshPy::renameGroup(PyObject* args) const
+{
+    int id;
+    const char* name;
+    if (!PyArg_ParseTuple(args, "is", &id, &name)) {
+        return nullptr;
+    }
+
+    getFemMeshPtr()->renameGroup(id, name);
+
+    Py_Return;
+}
 
 PyObject* FemMeshPy::getElementType(PyObject* args) const
 {