Changes to python-defined add object operators:

- Reset rotation value when toggling Align to View property
  which correctly re-alignes object on continuous property
  toggling and fixes issue
  #30510: [2.62] Add Mesh - Torus - "Align to View" cannot be switched back when toggling off

- Moves all generic object-add properties into a helper function
  which might be easily re-used.

release/scripts/modules/bpy_extras/object_utils.py

@@ -21,12 +21,15 @@
 __all__ = (
     "add_object_align_init",
     "object_data_add",
+    "object_generic_transform_prop",
     )
 
 
 import bpy
 import mathutils
 
+from bpy.props import (BoolProperty, FloatVectorProperty)
+
 
 def add_object_align_init(context, operator):
     """
@@ -120,7 +123,8 @@ def object_data_add(context, obdata, operator=None, use_active_layer=True):
             base.layers_from_view(context.space_data)
             base.layers[scene.active_layer] = True
         else:
-            base.layers = [True if i == scene.active_layer else False for i in range(len(scene.layers))]
+            base.layers = [True if i == scene.active_layer
+                else False for i in range(len(scene.layers))]
     if v3d:
         base.layers_from_view(context.space_data)
 
@@ -163,3 +167,23 @@ def object_data_add(context, obdata, operator=None, use_active_layer=True):
             bpy.ops.object.mode_set(mode='EDIT')
 
     return base
+
+
+class AddObjectHelper:
+    def view_align_update_callback(self, context):
+        if not self.view_align:
+            self.rotation.zero()
+
+    view_align = BoolProperty(
+            name="Align to View",
+            default=False,
+            update=view_align_update_callback,
+            )
+    location = FloatVectorProperty(
+            name="Location",
+            subtype='TRANSLATION',
+            )
+    rotation = FloatVectorProperty(
+            name="Rotation",
+            subtype='EULER',
+            )