update

src/core/widget.js

@@ -226,35 +226,36 @@
          * @returns {boolean}
          * @private
          */
-        _mount: function (force, deep, lifeHook, predicate) {
-            if (this.__beforeMount(force, deep, lifeHook, predicate)) {
-                this.__afterMount(lifeHook, predicate);
-                return true;
-            }
-            return false;
-        },
-
-        __beforeMount: function (force, deep, lifeHook, predicate) {
+        _mount: function (force, deep, lifeHook, predicate, layer, queue) {
             var self = this;
+            if (!layer) {
+                layer = 0;
+            }
+            if (!queue) {
+                queue = [];
+            }
             if (!force && (this._isMounted || !this.isVisible() || this.__asking === true || !(this._isRoot === true || (this._parent && this._parent._isMounted === true)))) {
                 return false;
             }
             lifeHook !== false && callLifeHook(this, "beforeMount");
             this._isMounted = true;
+            queue.push(this);
             BI.each(this._children, function (i, widget) {
                 !self.isEnabled() && widget._setEnable(false);
                 !self.isValid() && widget._setValid(false);
-                widget.__beforeMount && widget.__beforeMount(deep ? force : false, deep, lifeHook, predicate);
+                widget._mount && widget._mount(deep ? force : false, deep, lifeHook, predicate, layer + 1, queue);
             });
             this._mountChildren && this._mountChildren();
+            if (layer === 0) {
+                BI.each(queue, function (i, w) {
+                    w.__afterMount(lifeHook, predicate);
+                });
+            }
             return true;
         },
 
         __afterMount: function (lifeHook, predicate) {
             if (this._isMounted) {
-                BI.each(this._children, function (i, widget) {
-                    widget.__afterMount && widget.__afterMount(lifeHook, predicate);
-                });
                 lifeHook !== false && callLifeHook(this, "mounted");
                 this.fireEvent(BI.Events.MOUNT);
                 predicate && predicate(this);