Add Observable class

openVulkanoCpp/Base/Observable.hpp

@@ -1,8 +1,74 @@
-//
-// Created by georg on 2024-04-24.
-//
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
-#ifndef MADVOXEL_SCANAPP_OBSERVABLE_HPP
-#define MADVOXEL_SCANAPP_OBSERVABLE_HPP
+#include "Event.hpp"
 
-#endif //MADVOXEL_SCANAPP_OBSERVABLE_HPP
+namespace OpenVulkano
+{
+	template<typename T>
+	class Observable final
+	{
+		T object;
+
+		void Notify() { OnChange(object); }
+
+	public:
+		template<typename = std::enable_if_t<std::is_default_constructible_v<T>>>
+		Observable() {}
+
+		Observable(const T& initValue) : object(initValue) {}
+
+		Observable(T&& initValue) : object(std::forward(initValue)) {}
+
+		//TODO make this somehow only work for none string types to prevent issues?
+		/*template<typename = std::enable_if_t<std::is_default_constructible_v<T>>>
+		explicit Observable(const std::string& observableName) : OnChange(observableName) {}*/
+
+		Observable(const T& initValue, const std::string& observableName)
+				: object(initValue), OnChange(observableName)
+		{}
+
+		Observable(T&& initValue, const std::string& observableName)
+				: object(std::forward(initValue)), OnChange(observableName)
+		{}
+
+		template<typename = std::enable_if_t<std::is_copy_assignable_v<T>>>
+		auto& operator = (const T& val) { object = val; Notify(); return *this; }
+
+		template<typename = std::enable_if_t<std::is_move_assignable_v<T>>>
+		auto& operator = (T&& val) { object = std::forward(val); Notify(); return *this; }
+
+		template<typename = std::enable_if_t<std::is_copy_assignable_v<T>>>
+		operator T() const { return object; }
+
+		operator const T&() const { return object; }
+
+		bool operator ==(const T& other) const { return object == other; }
+		bool operator !=(const T& other) const { return object != other; }
+		bool operator <(const T& other) const { return object < other; }
+		bool operator <=(const T& other) const { return object <= other; }
+		bool operator >(const T& other) const { return object > other; }
+		bool operator >=(const T& other) const { return object >= other; }
+		bool operator !() const { return !object; }
+
+		operator bool() const { return object.operator bool(); }
+		auto& operator ++() { ++object; Notify(); return *this; }
+		auto& operator --() { --object; Notify(); return *this; }
+		auto& operator ++(int) { object++; Notify(); return *this; }
+		auto& operator --(int) { object--; Notify(); return *this; }
+
+		auto& operator +=(const T& other) { object += other; Notify(); return *this; }
+		auto& operator -=(const T& other) { object -= other; Notify(); return *this; }
+		auto& operator *=(const T& other) { object *= other; Notify(); return *this; }
+		auto& operator /=(const T& other) { object /= other; Notify(); return *this; }
+
+		const T* operator ->() const { return &object; }
+
+		void MutatingAccess(const std::function<bool(T&)> accessFunction) { if (accessFunction(object)) Notify(); }
+
+		Event<const T&> OnChange;
+	};
+}