From d4f60113c6fffe5d3ed188437e5079da6e6c44f0 Mon Sep 17 00:00:00 2001
From: Bernd Hahnebach <bernd@bimstatik.org>
Date: Tue, 3 Mar 2020 21:04:25 +0100
Subject: [PATCH] FEM: use python base constraint class, material non linear

---
 ...wProviderFemMaterialMechanicalNonlinear.py | 54 +------------------
 .../_FemMaterialMechanicalNonlinear.py        | 13 ++---
 2 files changed, 9 insertions(+), 58 deletions(-)

diff --git a/src/Mod/Fem/femguiobjects/_ViewProviderFemMaterialMechanicalNonlinear.py b/src/Mod/Fem/femguiobjects/_ViewProviderFemMaterialMechanicalNonlinear.py
index e56539e5d7..7bc328d810 100644
--- a/src/Mod/Fem/femguiobjects/_ViewProviderFemMaterialMechanicalNonlinear.py
+++ b/src/Mod/Fem/femguiobjects/_ViewProviderFemMaterialMechanicalNonlinear.py
@@ -28,61 +28,11 @@ __url__ = "http://www.freecadweb.org"
 #  \ingroup FEM
 #  \brief FreeCAD FEM _ViewProviderFemMaterialMechanicalNonlinear
 
-import FreeCAD
-import FreeCADGui
-import FemGui  # needed to display the icons in TreeView
-
-from pivy import coin
-
-False if FemGui.__name__ else True  # flake8, dummy FemGui usage
+from . import ViewProviderFemConstraint
 
 
-class _ViewProviderFemMaterialMechanicalNonlinear:
+class _ViewProviderFemMaterialMechanicalNonlinear(ViewProviderFemConstraint.ViewProxy):
     "A View Provider for the FemMaterialMechanicalNonlinear object"
-    def __init__(self, vobj):
-        vobj.Proxy = self
 
     def getIcon(self):
         return ":/icons/fem-material-nonlinear.svg"
-
-    def attach(self, vobj):
-        self.ViewObject = vobj
-        self.Object = vobj.Object
-        self.standard = coin.SoGroup()
-        vobj.addDisplayMode(self.standard, "Default")
-
-    def getDisplayModes(self, obj):
-        return ["Default"]
-
-    def getDefaultDisplayMode(self):
-        return "Default"
-
-    def updateData(self, obj, prop):
-        return
-
-    def onChanged(self, vobj, prop):
-        return
-
-    def setEdit(self, vobj, mode=0):
-        # avoid edit mode by return False
-        # https://forum.freecadweb.org/viewtopic.php?t=12139&start=10#p161062
-        return False
-
-    def doubleClicked(self, vobj):
-        guidoc = FreeCADGui.getDocument(vobj.Object.Document)
-        # check if another VP is in edit mode
-        # https://forum.freecadweb.org/viewtopic.php?t=13077#p104702
-        if not guidoc.getInEdit():
-            guidoc.setEdit(vobj.Object.Name)
-        else:
-            from PySide.QtGui import QMessageBox
-            message = "Active Task Dialog found! Please close this one before opening  a new one!"
-            QMessageBox.critical(None, "Error in tree view", message)
-            FreeCAD.Console.PrintError(message + "\n")
-        return True
-
-    def __getstate__(self):
-        return None
-
-    def __setstate__(self, state):
-        return None
diff --git a/src/Mod/Fem/femobjects/_FemMaterialMechanicalNonlinear.py b/src/Mod/Fem/femobjects/_FemMaterialMechanicalNonlinear.py
index 7e29c18702..79bc8e73e1 100644
--- a/src/Mod/Fem/femobjects/_FemMaterialMechanicalNonlinear.py
+++ b/src/Mod/Fem/femobjects/_FemMaterialMechanicalNonlinear.py
@@ -27,12 +27,16 @@ __url__ = "http://www.freecadweb.org"
 #  \ingroup FEM
 #  \brief FEM nonlinear mechanical material object
 
+from . import FemConstraint
 
-class _FemMaterialMechanicalNonlinear:
+
+class _FemMaterialMechanicalNonlinear(FemConstraint.Proxy):
     "The FemMaterialMechanicalNonlinear object"
+
+    Type = "Fem::MaterialMechanicalNonlinear"
+
     def __init__(self, obj):
-        obj.Proxy = self
-        self.Type = "Fem::MaterialMechanicalNonlinear"
+        super(_FemMaterialMechanicalNonlinear, self).__init__(obj)
 
         obj.addProperty(
             "App::PropertyLink",
@@ -74,6 +78,3 @@ class _FemMaterialMechanicalNonlinear:
             "Set stress and strain for yield point three, separated by a comma."
         )
         obj.YieldPoint3 = ""
-
-    def execute(self, obj):
-        return