Allow selection of edges for engraving.

src/Mod/Path/PathScripts/PathSelection.py

@@ -45,16 +45,23 @@ class MESHGate:
 
 class ENGRAVEGate:
     def allow(self, doc, obj, sub):
-        engraveable = False
-        if hasattr(obj, "Shape"):
-            if obj.Shape.BoundBox.ZLength == 0.0:
-                try:
-                    obj = obj.Shape
-                except:
-                    return False
-                if len(obj.Wires) > 0:
-                    engraveable = True
-        return engraveable
+        try:
+            shape = obj.Shape
+        except:
+            return False
+
+        if shape.BoundBox.ZLength == 0.0 and len(obj.Wires) > 0:
+            return True
+
+        if shape.ShapeType == 'Edge':
+            return True
+
+        if sub:
+            subShape = shape.getElement(sub)
+            if subShape.ShapeType == 'Edge':
+                return True
+
+        return False
 
 
 class DRILLGate: