Converted a couple more things to shared pointers.

src/dawn/event/Event.hpp

@@ -0,0 +1,32 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnlibs.hpp"
+
+namespace Dawn {
+  template<typename ...T>
+  class Event {
+    private:
+      std::hashmap<int32_t, std::function<void(T...)>> callback;
+      int32_t nextEventId = 0;
+
+    public:
+      int32_t listen(const std::function <void(T...)> &callback) {
+        this->callback.insert(std::make_pair(this->nextEventId, callback));
+        return this->nextEventId++;
+      }
+
+      void unlisten(int32_t id) {
+        this->callback.erase(id);
+      }
+
+      void trigger(T... args) {
+        for(auto &it : this->callback) {
+          it.second(args...);
+        }
+      }
+  };
+}