add smart callback for when gadgets get reparented

this can be useful for gadgets which (inexplicably) need to set min size hints

src/bin/e_bryce.c

@@ -352,6 +352,7 @@ _bryce_style(Evas_Object *site, Eina_Stringshare *name, Evas_Object *g)
    e_theme_edje_object_set(ly, NULL, buf);
    prev = e_gadget_util_layout_style_init(g, ly);
    elm_object_part_content_set(ly, "e.swallow.content", g);
+   evas_object_smart_callback_call(g, "gadget_reparent", ly);
    evas_object_del(prev);
 }
 

src/bin/e_gadget.h

@@ -70,7 +70,12 @@
      - called on a gadget object when the "gadget_menu" action has been triggered
      - event_info is an E_Menu object
      - if a configure callback has been passed with e_gadget_configure_cb_set(),
-     a "Settings" item will be automatically added with this callback
+       a "Settings" item will be automatically added with this callback
+   "gadget_reparent"
+     - called on a gadget object when the gadget has been reparented
+     - parent object is event_info
+     - indicates that the gadget should watch this new object for EVAS_CALLBACK_RESIZE
+     - event_info will be NULL in the case that the reparenting removes the parent
  -------------------------------
  -------------------------------
  * called externally by gadget on gadget object: