VN System improved.

src/dawn/scene/components/ui/UICanvas.hpp

@@ -57,6 +57,17 @@ namespace Dawn {
         this->children.push_back(item);
         return item;
       }
+
+      template<class T>
+      T * findElement() {
+        auto it = this->children.begin();
+        while(it != this->children.end()) {
+          auto castedAs = dynamic_cast<T*>(*it);
+          if(castedAs != nullptr) return castedAs;
+          ++it;
+        }
+        return nullptr;
+      }
       
       /**
        * Returns the width of the root UI Canvas size. In future I may allow