diff --git a/src/lib/efl/interfaces/efl_interfaces_main.c b/src/lib/efl/interfaces/efl_interfaces_main.c
--- a/src/lib/efl/interfaces/efl_interfaces_main.c
+++ b/src/lib/efl/interfaces/efl_interfaces_main.c
@@ -118,15 +118,11 @@
 static Eina_Value
 _efl_ui_view_factory_item_created(Eo *factory, void *data EINA_UNUSED, const Eina_Value v)
 {
-   Efl_Ui_Factory_Item_Created_Event event = { NULL, NULL };
+   Efl_Gfx_Entity *item;
    int len, i;
 
-   EINA_VALUE_ARRAY_FOREACH(&v, len, i, event.item)
-     {
-        event.model = efl_ui_view_model_get(event.item);
-
-        efl_event_callback_call(factory, EFL_UI_FACTORY_EVENT_CREATED, &event);
-     }
+   EINA_VALUE_ARRAY_FOREACH(&v, len, i, item)
+     efl_event_callback_call(factory, EFL_UI_FACTORY_EVENT_ITEM_CREATED, item);
 
    return v;
 }
diff --git a/src/lib/efl/interfaces/efl_ui_factory.eo b/src/lib/efl/interfaces/efl_ui_factory.eo
--- a/src/lib/efl/interfaces/efl_ui_factory.eo
+++ b/src/lib/efl/interfaces/efl_ui_factory.eo
@@ -11,6 +11,8 @@
      This object represents a Factory in the factory pattern. Objects should be created via the method
      @Efl.Ui.View_Factory.create_with_event, which will in turn call the necessary APIs from this interface.
      Objects created this way should be removed using @.release.
+
+     It is recommended to not create your own @Efl.Ui.Factory and use event handler as much as possible.
    ]]
    methods {
       create @protected {
@@ -31,18 +33,12 @@
             ui_view: Efl.Gfx.Entity; [[Object to remove.]]
          }
       }
-      building @const {
-         [[This function is called during the creation of an UI object between the @Efl.Object.constructor and
-           @Efl.Object.finalize call.
-
-           Note: If the @Efl.Ui.Factory does keep a cache of objects, this won't be called when objects are pulled out
-           of the cache.]]
-         params {
-            ui_view: Efl.Gfx.Entity; [[The UI object being created.]]
-         }
-      }
    }
    events {
-      created: Efl.Ui.Factory_Item_Created_Event; [[Event triggered when an item has been successfully created.]]
+      item,constructing: Efl.Gfx.Entity; [[Event triggered when an item is under construction (between the @Efl.Object.constructor and @Efl.Object.finalize call on the item).
+                                         Note:  If the @Efl.Ui.Factory does keep a cache of objects, this won't be called when objects are pulled out of the cache.]]
+      item,building: Efl.Gfx.Entity; [[Event triggered when an item has processed @Efl.Object.finalize, but before all the factory are done building it.
+                                     Note: if the @Efl.Ui.Factory does keep a cache of object, this will be called when object are pulled out of the cache.]]
+      item,created: Efl.Gfx.Entity; [[Event triggered when an item has been successfully created by the factory and is about to be used by an @Efl.Ui.View.]]
    }
 }
diff --git a/src/lib/elementary/efl_ui_caching_factory.c b/src/lib/elementary/efl_ui_caching_factory.c
--- a/src/lib/elementary/efl_ui_caching_factory.c
+++ b/src/lib/elementary/efl_ui_caching_factory.c
@@ -246,8 +246,9 @@
         EINA_ITERATOR_FOREACH(models, model)
           {
              w = efl_add(pd->klass, parent,
-                         efl_ui_factory_building(obj, efl_added),
-                         efl_ui_view_model_set(efl_added, model));
+                         efl_ui_view_model_set(efl_added, model),
+                         efl_event_callback_call(obj, EFL_UI_FACTORY_EVENT_ITEM_CONSTRUCTING, efl_added));
+             efl_event_callback_call(obj, EFL_UI_FACTORY_EVENT_ITEM_BUILDING, w);
              eina_value_array_append(&gr->done, w);
           }
 
diff --git a/src/lib/elementary/efl_ui_image_factory.c b/src/lib/elementary/efl_ui_image_factory.c
--- a/src/lib/elementary/efl_ui_image_factory.c
+++ b/src/lib/elementary/efl_ui_image_factory.c
@@ -15,12 +15,23 @@
     Eina_Stringshare *property;
 } Efl_Ui_Image_Factory_Data;
 
+static void
+_efl_ui_image_factory_building(void *data, const Efl_Event *ev)
+{
+   Efl_Ui_Image_Factory_Data *pd = data;
+   Efl_Gfx_Entity *ui_view = ev->info;
+
+   efl_ui_property_bind(ui_view, "filename", pd->property);
+}
+
 EOLIAN static Eo *
 _efl_ui_image_factory_efl_object_constructor(Eo *obj, Efl_Ui_Image_Factory_Data *pd)
 {
    obj = efl_constructor(efl_super(obj, MY_CLASS));
    efl_ui_widget_factory_item_class_set(obj, EFL_UI_IMAGE_CLASS);
 
+   efl_event_callback_add(obj, EFL_UI_FACTORY_EVENT_ITEM_BUILDING, _efl_ui_image_factory_building, pd);
+
    pd->property = NULL;
 
    return obj;
@@ -35,14 +46,6 @@
    efl_destructor(efl_super(obj, MY_CLASS));
 }
 
-EOLIAN static void
-_efl_ui_image_factory_efl_ui_factory_building(const Eo *obj EINA_UNUSED, Efl_Ui_Image_Factory_Data *pd, Efl_Gfx_Entity *ui_view)
-{
-   efl_ui_property_bind(ui_view, "filename", pd->property);
-
-   efl_ui_factory_building(efl_super(obj, EFL_UI_IMAGE_FACTORY_CLASS), ui_view);
-}
-
 EOLIAN static Eina_Future *
 _efl_ui_image_factory_efl_ui_factory_create(Eo *obj, Efl_Ui_Image_Factory_Data *pd,
                                             Eina_Iterator *models, Efl_Gfx_Entity *parent)
diff --git a/src/lib/elementary/efl_ui_image_factory.eo b/src/lib/elementary/efl_ui_image_factory.eo
--- a/src/lib/elementary/efl_ui_image_factory.eo
+++ b/src/lib/elementary/efl_ui_image_factory.eo
@@ -5,7 +5,6 @@
       Efl.Object.constructor;
       Efl.Object.destructor;
       Efl.Ui.Factory.create;
-      Efl.Ui.Factory.building;
       Efl.Ui.Property_Bind.property_bind;
    }
 }
diff --git a/src/lib/elementary/efl_ui_layout_factory.c b/src/lib/elementary/efl_ui_layout_factory.c
--- a/src/lib/elementary/efl_ui_layout_factory.c
+++ b/src/lib/elementary/efl_ui_layout_factory.c
@@ -44,6 +44,22 @@
    return EINA_TRUE;
 }
 
+static void
+_efl_ui_layout_factory_building(void *data, const Efl_Event *event)
+{
+   Efl_Ui_Layout_Factory_Data *pd = data;
+   Efl_Gfx_Entity *ui_view = event->info;
+
+   if (pd->klass || pd->group || pd->style)
+     efl_ui_layout_theme_set(ui_view, pd->klass, pd->group, pd->style);
+
+   eina_hash_foreach(pd->bind.properties, _property_bind, ui_view);
+   eina_hash_foreach(pd->bind.factories, _factory_bind, ui_view);
+
+   efl_gfx_hint_weight_set(ui_view, EFL_GFX_HINT_EXPAND, 0);
+   efl_gfx_hint_fill_set(ui_view, EINA_TRUE, EINA_TRUE);
+}
+
 EOLIAN static Eo *
 _efl_ui_layout_factory_efl_object_constructor(Eo *obj, Efl_Ui_Layout_Factory_Data *pd)
 {
@@ -54,6 +70,8 @@
    pd->bind.properties = eina_hash_stringshared_new(EINA_FREE_CB(eina_stringshare_del));
    pd->bind.factories = eina_hash_stringshared_new(EINA_FREE_CB(efl_unref));
 
+   efl_event_callback_add(obj, EFL_UI_FACTORY_EVENT_ITEM_BUILDING, _efl_ui_layout_factory_building, pd);
+
    return obj;
 }
 
@@ -70,21 +88,6 @@
    efl_destructor(efl_super(obj, MY_CLASS));
 }
 
-static void
-_efl_ui_layout_factory_efl_ui_factory_building(const Eo *obj, Efl_Ui_Layout_Factory_Data *pd, Efl_Gfx_Entity *ui_view)
-{
-   if (pd->klass || pd->group || pd->style)
-     efl_ui_layout_theme_set(ui_view, pd->klass, pd->group, pd->style);
-
-   eina_hash_foreach(pd->bind.properties, _property_bind, ui_view);
-   eina_hash_foreach(pd->bind.factories, _factory_bind, ui_view);
-
-   efl_gfx_hint_weight_set(ui_view, EFL_GFX_HINT_EXPAND, 0);
-   efl_gfx_hint_fill_set(ui_view, EINA_TRUE, EINA_TRUE);
-
-   efl_ui_factory_building(efl_super(obj, EFL_UI_LAYOUT_FACTORY_CLASS), ui_view);
-}
-
 EOLIAN static void
 _efl_ui_layout_factory_efl_ui_factory_bind_factory_bind(Eo *obj EINA_UNUSED, Efl_Ui_Layout_Factory_Data *pd,
                                                         const char *key, Efl_Ui_Factory *factory)
diff --git a/src/lib/elementary/efl_ui_layout_factory.eo b/src/lib/elementary/efl_ui_layout_factory.eo
--- a/src/lib/elementary/efl_ui_layout_factory.eo
+++ b/src/lib/elementary/efl_ui_layout_factory.eo
@@ -15,7 +15,6 @@
    implements {
       Efl.Object.constructor;
       Efl.Object.destructor;
-      Efl.Ui.Factory.building;
       Efl.Ui.Property_Bind.property_bind;
       Efl.Ui.Factory_Bind.factory_bind;
    }
diff --git a/src/lib/elementary/efl_ui_widget_factory.c b/src/lib/elementary/efl_ui_widget_factory.c
--- a/src/lib/elementary/efl_ui_widget_factory.c
+++ b/src/lib/elementary/efl_ui_widget_factory.c
@@ -69,8 +69,20 @@
 }
 
 static void
-_efl_ui_widget_factory_efl_ui_factory_building(const Eo *factory EINA_UNUSED, Efl_Ui_Widget_Factory_Data *pd, Efl_Gfx_Entity *ui_view)
+_efl_ui_widget_factory_constructing(void *data EINA_UNUSED, const Efl_Event *ev)
 {
+   Efl_Gfx_Entity *ui_view = ev->info;
+
+   /* NOP */
+   (void)(ui_view);
+}
+
+
+static void
+_efl_ui_widget_factory_building(void *data, const Efl_Event *ev)
+{
+   Efl_Gfx_Entity *ui_view = ev->info;
+   Efl_Ui_Widget_Factory_Data *pd = data;
    const Efl_Model *model;
    Eina_Value *property, *width, *height;
    Efl_Ui_Bind_Part_Data *bpd;
@@ -122,6 +134,21 @@
    eina_value_free(property);
 }
 
+EFL_CALLBACKS_ARRAY_DEFINE(item_callbacks,
+                           { EFL_UI_FACTORY_EVENT_ITEM_CONSTRUCTING, _efl_ui_widget_factory_constructing },
+                           { EFL_UI_FACTORY_EVENT_ITEM_BUILDING, _efl_ui_widget_factory_building })
+
+static Eo *
+_efl_ui_widget_factory_efl_object_constructor(Efl_Ui_Widget_Factory *obj,
+                                              Efl_Ui_Widget_Factory_Data *pd)
+{
+   obj = efl_constructor(efl_super(obj, EFL_UI_WIDGET_FACTORY_CLASS));
+
+   efl_event_callback_array_add(obj, item_callbacks(), pd);
+
+   return obj;
+}
+
 static Efl_Ui_Widget *
 _efl_ui_widget_create(const Efl_Ui_Factory *factory,
                       const Efl_Class *klass, Eo *parent,
@@ -131,7 +158,8 @@
 
    w = efl_add(klass, parent,
                efl_ui_view_model_set(efl_added, model),
-               efl_ui_factory_building(factory, efl_added));
+               efl_event_callback_call((Efl_Ui_Factory *) factory, EFL_UI_FACTORY_EVENT_ITEM_CONSTRUCTING, efl_added));
+   efl_event_callback_call((Efl_Ui_Factory *) factory, EFL_UI_FACTORY_EVENT_ITEM_BUILDING, w);
    return w;
 }
 
diff --git a/src/lib/elementary/efl_ui_widget_factory.eo b/src/lib/elementary/efl_ui_widget_factory.eo
--- a/src/lib/elementary/efl_ui_widget_factory.eo
+++ b/src/lib/elementary/efl_ui_widget_factory.eo
@@ -4,7 +4,6 @@
 
      This factory is designed to build @Efl.Ui.Widget and optionally set their
      @Efl.Ui.Widget.style if it was connected with @Efl.Ui.Property_Bind.property_bind "$style".
-
    ]]
    methods {
       @property item_class {
@@ -18,9 +17,9 @@
    }
 
    implements {
+      Efl.Object.constructor;
       Efl.Ui.Factory.create;
       Efl.Ui.Factory.release;
-      Efl.Ui.Factory.building;
       Efl.Ui.Property_Bind.property_bind;
       Efl.Part.part_get;
    }