add quick item to quick view dynamically

doric-Qt/doric/utils/DoricUtils.h

@@ -20,6 +20,11 @@ public:
 
     return content;
   }
+
+  template <typename Base, typename T>
+  static inline bool instanceof (const T *) {
+    return std::is_base_of<Base, T>::value;
+  }
 };
 
 #endif // UTILS_H