camera notify

include/td/misc/ObjectNotifier.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <algorithm>
+#include <functional>
+#include <vector>
+
+namespace td {
+namespace utils {
+
+template <typename Listener>
+class ObjectNotifier {
+protected:
+	std::vector<Listener*> m_Listeners;
+
+public:
+	void BindListener(Listener* listener) {
+		m_Listeners.push_back(listener);
+	}
+
+	void UnbindListener(Listener* listener) {
+		auto iter = std::find(m_Listeners.begin(), m_Listeners.end(), listener);
+
+		if (iter == m_Listeners.end()) return;
+
+		m_Listeners.erase(iter);
+	}
+
+	template <typename Func, typename... Args>
+	void NotifyListeners(Func function, Args... args) {
+		for (Listener* listener : m_Listeners)
+			std::bind(function, listener, args...)();
+	}
+};
+
+} // namespace utils
+} // namespace td