update

src/core/4.widget.js

@@ -903,14 +903,24 @@
 
     BI.useContext = function (inject) {
         if (BI.Model.target) {
-            var p = BI.Model.target;
+            var vm = BI.Model.target;
             if (inject) {
-                while (p) {
+                if (vm.$$computed && inject in vm.$$computed) {
-                    if (p.$$context && inject in p.$$context) {
+                    return vm;
-                        return p;
                 }
-                    p = p._parent;
+                if (vm.$$state && inject in vm.$$state) {
+                    return vm;
                 }
+                if (vm.$$model && inject in vm.$$model) {
+                    return vm;
+                }
+                while (vm) {
+                    if (vm.$$context && inject in vm.$$context) {
+                        return vm;
+                    }
+                    vm = vm._parent;
+                }
+                return null;
             }
         }
         return BI.Model.target;