Use cls.view_attributes() to define states in views

asset.py

@@ -340,3 +340,16 @@ class Asset:
     @staticmethod
     def default_conductors_connection():
         return ''
+
+    @classmethod
+    def view_attributes(cls):
+        res = super(Asset, cls).view_attributes()
+        res += [
+            ('/form/separator[@id="elevator"]', 'states', {
+                    'invisible': Eval('type') != 'elevator',
+                    }),
+            ('/form/notebook/page[@id="components"]', 'states', {
+                    'invisible': Eval('type') != 'elevator',
+                    }),
+            ]
+        return res

view/asset_form.xml

@@ -3,7 +3,7 @@
      copyright notices and license terms. -->
 <data>
     <xpath expr="/form/notebook" position="before">
-        <separator id="elevator" string="Elevator Info" states="{'invisible': Eval('type') != 'elevator'}" colspan="4"/>
+        <separator id="elevator" string="Elevator Info" colspan="4"/>
         <group col="6" colspan="4" id="elevator_info">
             <label name="elevator_type"/>
             <field name="elevator_type"/>
@@ -28,7 +28,7 @@
         </group>
     </xpath>
     <xpath expr="/form/notebook" position="inside">
-        <page id="components" string="Components" col="2" states="{'invisible': Eval('type') != 'elevator'}">
+        <page id="components" string="Components" col="2">
             <group id="doors_limiter" col="1">
                 <group id="doors" col="2">
                     <separator id="doors" string="Doors" colspan="2"/>