Fem: Add electrostatic constraint symbol

src/Mod/Fem/Gui/CMakeLists.txt

@@ -367,6 +367,7 @@ SET(FemGuiIcon_SVG
 SET(FemGuiSymbol_IV
     Resources/symbols/ConstraintContact.iv
     Resources/symbols/ConstraintDisplacement.iv
+    Resources/symbols/ConstraintElectrostaticPotential.iv
     Resources/symbols/ConstraintFixed.iv
     Resources/symbols/ConstraintForce.iv
     Resources/symbols/ConstraintHeatFlux.iv

src/Mod/Fem/Gui/Resources/symbols/ConstraintElectrostaticPotential.iv

@@ -0,0 +1,73 @@
+#Inventor V2.1 ascii
+
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+#/***************************************************************************
+# *   Copyright (c) 2024 Mario Passaglia <mpassaglia[at]cbc.uba.ar>         *
+# *                                                                         *
+# *   This file is part of FreeCAD.                                         *
+# *                                                                         *
+# *   FreeCAD is free software: you can redistribute it and/or modify it    *
+# *   under the terms of the GNU Lesser General Public License as           *
+# *   published by the Free Software Foundation, either version 2.1 of the  *
+# *   License, or (at your option) any later version.                       *
+# *                                                                         *
+# *   FreeCAD 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      *
+# *   Lesser General Public License for more details.                       *
+# *                                                                         *
+# *   You should have received a copy of the GNU Lesser General Public      *
+# *   License along with FreeCAD. If not, see                               *
+# *   <https://www.gnu.org/licenses/>.                                      *
+# *                                                                         *
+# **************************************************************************
+
+
+Separator {
+
+  Separator {
+
+    Translation {
+      translation 0 1.25 0
+
+    }
+    Cylinder {
+      radius 0.25
+      height 2.5
+
+    }
+    Translation {
+      translation 0 1.3 0
+
+    }
+    Cube {
+      width 2
+      height 0.1
+      depth 0.75
+
+    }
+    Translation {
+      translation 0 0.4 0
+
+    }
+    BaseColor {
+      rgb 0.17 0.46 1.0
+
+    }
+    Cube {
+      width 1.5
+      height 0.1
+      depth 0.75
+
+    }
+    Translation {
+      translation 0 0.3 0
+
+    }
+    Cylinder {
+      radius 0.25
+      height 0.5
+    }
+  }
+}

src/Mod/Fem/femviewprovider/view_constraint_electrostaticpotential.py

@@ -36,7 +36,17 @@
 
 class VPConstraintElectroStaticPotential(view_base_femconstraint.VPBaseFemConstraint):
 
+    def __init__(self, vobj):
+        super().__init__(vobj)
+        mat = vobj.ShapeAppearance[0]
+        mat.DiffuseColor = (1.0, 0.0, 0.2, 0.0)
+        vobj.ShapeAppearance = mat
+
     def setEdit(self, vobj, mode=0):
         view_base_femconstraint.VPBaseFemConstraint.setEdit(
             self, vobj, mode, task_constraint_electrostaticpotential._TaskPanel
         )
+
+    def attach(self, vobj):
+        super().attach(vobj)
+        vobj.loadSymbol(self.resource_symbol_dir + "ConstraintElectrostaticPotential.iv")