Adding callback for box to be called when a child is added or removed.

    Also sets the children_changed flag when changing children list.

    by Otavio Pontes <otavio@profusion.mobi>

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@52541 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

diff --git a/src/lib/Evas.h b/src/lib/Evas.h
index bceb764..f6d714a 100644 (file)
--- a/src/lib/Evas.h
+++ b/src/lib/Evas.h
@@ -1987,6 +1987,7 @@ struct _Evas_Smart_Cb_Description
         void (*free_data)(void *data);
       } layout;
       Eina_Bool layouting : 1;
+      Eina_Bool children_changed : 1;
    };
 
    struct _Evas_Object_Box_Option

diff --git a/src/lib/canvas/evas_object_box.c b/src/lib/canvas/evas_object_box.c
index 4a5e667..b5b6548 100644 (file)
--- a/src/lib/canvas/evas_object_box.c
+++ b/src/lib/canvas/evas_object_box.c
@@ -25,6 +25,13 @@ struct _Evas_Object_Box_Accessor
  */
 
 static const char _evas_object_box_type[] = "Evas_Object_Box";
+static const char SIG_CHILD_ADDED[] = "child,added";
+static const char SIG_CHILD_REMOVED[] = "child,removed";
+static const Evas_Smart_Cb_Description _signals[] = {
+   {SIG_CHILD_ADDED, ""},
+   {SIG_CHILD_REMOVED, ""},
+   {NULL, NULL}
+};
 
 
 static void _sizing_eval(Evas_Object *obj);
@@ -237,6 +244,8 @@ _evas_object_box_append_default(Evas_Object *o, Evas_Object_Box_Data *priv, Evas
      return NULL;
 
    priv->children = eina_list_append(priv->children, opt);
+   priv->children_changed = EINA_TRUE;
+   evas_object_smart_callback_call(o, SIG_CHILD_ADDED, opt);
 
    return opt;
 }
@@ -251,6 +260,8 @@ _evas_object_box_prepend_default(Evas_Object *o, Evas_Object_Box_Data *priv, Eva
      return NULL;
 
    priv->children = eina_list_prepend(priv->children, opt);
+   priv->children_changed = EINA_TRUE;
+   evas_object_smart_callback_call(o, SIG_CHILD_ADDED, opt);
 
    return opt;
 }
@@ -273,6 +284,8 @@ _evas_object_box_insert_before_default(Evas_Object *o, Evas_Object_Box_Data *pri
 
             priv->children = eina_list_prepend_relative
               (priv->children, new_opt, opt);
+             priv->children_changed = EINA_TRUE;
+             evas_object_smart_callback_call(o, SIG_CHILD_ADDED, new_opt);
             return new_opt;
          }
      }
@@ -298,6 +311,8 @@ _evas_object_box_insert_after_default(Evas_Object *o, Evas_Object_Box_Data *priv
 
             priv->children = eina_list_append_relative
                (priv->children, new_opt, opt);
+             priv->children_changed = EINA_TRUE;
+             evas_object_smart_callback_call(o, SIG_CHILD_ADDED, new_opt);
             return new_opt;
          }
      }
@@ -320,6 +335,8 @@ _evas_object_box_insert_at_default(Evas_Object *o, Evas_Object_Box_Data *priv, E
          return NULL;
 
         priv->children = eina_list_prepend(priv->children, new_opt);
+        priv->children_changed = EINA_TRUE;
+        evas_object_smart_callback_call(o, SIG_CHILD_ADDED, new_opt);
         return new_opt;
      }
 
@@ -337,6 +354,8 @@ _evas_object_box_insert_at_default(Evas_Object *o, Evas_Object_Box_Data *priv, E
 
             priv->children = eina_list_prepend_relative
               (priv->children, new_opt, opt);
+             priv->children_changed = EINA_TRUE;
+             evas_object_smart_callback_call(o, SIG_CHILD_ADDED, new_opt);
             return new_opt;
          }
      }
@@ -368,6 +387,8 @@ _evas_object_box_remove_default(Evas_Object *o, Evas_Object_Box_Data *priv, Evas
          {
             priv->children = eina_list_remove(priv->children, opt);
             api->option_free(o, priv, opt);
+             priv->children_changed = EINA_TRUE;
+             evas_object_smart_callback_call(o, SIG_CHILD_REMOVED, obj);
 
             return obj;
          }
@@ -405,6 +426,8 @@ _evas_object_box_remove_at_default(Evas_Object *o, Evas_Object_Box_Data *priv, u
 
    priv->children = eina_list_remove_list(priv->children, node);
    api->option_free(o, priv, opt);
+   priv->children_changed = EINA_TRUE;
+   evas_object_smart_callback_call(o, SIG_CHILD_REMOVED, obj);
    return obj;
 }
 
@@ -497,6 +520,7 @@ _evas_object_box_smart_calculate(Evas_Object *o)
            priv->layouting = 1;
            priv->layout.cb(o, priv, priv->layout.data);
            priv->layouting = 0;
+           priv->children_changed = EINA_FALSE;
        }
    else
      ERR("No layout function set for %p box.", o);
@@ -509,6 +533,7 @@ _evas_object_box_smart_set_user(Evas_Object_Box_Api *api)
    api->base.del = _evas_object_box_smart_del;
    api->base.resize = _evas_object_box_smart_resize;
    api->base.calculate = _evas_object_box_smart_calculate;
+   api->base.callbacks = _signals;
 
    api->append = _evas_object_box_append_default;
    api->prepend = _evas_object_box_prepend_default;