removed legacy code from chatGPT - EventDispatcher C++14.cpp

chatGPT - EventDispatcher C++14/.vs/chatGPT - EventDispatcher C++14/v17/DocumentLayout.backup.json

@@ -22,9 +22,9 @@
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chatGPT - EventDispatcher C++14/.vs/chatGPT - EventDispatcher C++14/v17/DocumentLayout.json

@@ -22,9 +22,9 @@
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chatGPT - EventDispatcher C++14/chatGPT - EventDispatcher C++14/chatGPT - EventDispatcher C++14.cpp

@@ -452,475 +452,3 @@ int main() {
     std::cout << "\n";
 }
 
-
-// This code is a more complex version of the EventDispatcher, which allows for different types of events and handlers.
-#if 0 
-/*
-Certainly!Here’s how you can improve the code by :
-
-1. * *Using an enum for event types** instead of string names.
-2. * *Using `Args...` for arguments** in `invokeAll`, `invokeById`, etc., so you don’t need to repeat the argument list everywhere.
-
-Below is a complete, working code example with these improvements :
-*/
-
-// 1. Define event types as enum
-enum class EventType {
-    ButtonClick,
-    Redraw,
-    Hover
-};
-
-// Helper for unique handler IDs
-class IdGen {
-    size_t current = 0;
-public:
-    size_t next() { return ++current; }
-};
-
-// Type-erased base for handler lists
-struct IEventHandlerList {
-    virtual ~IEventHandlerList() {}
-};
-
-// Templated handler list for a given signature
-template<typename Ret, typename... Args>
-class EventHandlerList : public IEventHandlerList {
-public:
-    using HandlerType = std::function<Ret(Args...)>;
-    struct HandlerEntry {
-        size_t id;
-        HandlerType handler;
-    };
-
-    size_t addHandler(const HandlerType& h) {
-        size_t id = idGen.next();
-        handlers.push_back({ id, h });
-        return id;
-    }
-
-    void removeHandler(size_t id) {
-        handlers.erase(std::remove_if(handlers.begin(), handlers.end(),
-            [id](const HandlerEntry& e) { return e.id == id; }), handlers.end());
-    }
-
-    std::vector<Ret> invokeAll(Args... args) {
-        std::vector<Ret> results;
-        for (auto& entry : handlers) {
-            results.push_back(entry.handler(args...));
-        }
-        return results;
-    }
-
-    Ret invokeById(size_t id, Args... args) {
-        for (auto& entry : handlers) {
-            if (entry.id == id)
-                return entry.handler(args...);
-        }
-        throw std::runtime_error("Handler ID not found");
-    }
-
-private:
-    std::vector<HandlerEntry> handlers;
-    IdGen idGen;
-};
-
-// The main dispatcher
-class EventDispatcher {
-public:
-    // Main template: add handler as std::function
-    template<typename Ret, typename... Args>
-    size_t addHandler(EventType eventType, std::function<Ret(Args...)> handler) {
-        auto key = std::make_pair(eventType, std::type_index(typeid(EventHandlerList<Ret, Args...>)));
-        auto& ptr = handlers[key];
-        if (!ptr) {
-            ptr.reset(new EventHandlerList<Ret, Args...>());
-        }
-        auto* list = static_cast<EventHandlerList<Ret, Args...>*>(ptr.get());
-        return list->addHandler(handler);
-    }
-
-    // Overload for free functions
-    template<typename Ret, typename... Args>
-    size_t addHandler(EventType eventType, Ret(*func)(Args...)) {
-        return addHandler<Ret, Args...>(eventType, std::function<Ret(Args...)>(func));
-    }
-
-    // Overload for non-const member functions
-    template<typename Ret, typename Class, typename... Args>
-    size_t addHandler(EventType eventType, Class* obj, Ret(Class::* memFn)(Args...)) {
-        auto wrapper = [obj, memFn](Args... args) -> Ret {
-            return (obj->*memFn)(args...);
-            };
-        return addHandler<Ret, Args...>(eventType, wrapper);
-    }
-
-    // Overload for const member functions
-    template<typename Ret, typename Class, typename... Args>
-    size_t addHandler(EventType eventType, Class* obj, Ret(Class::* memFn)(Args...) const) {
-        auto wrapper = [obj, memFn](Args... args) -> Ret {
-            return (obj->*memFn)(args...);
-            };
-        return addHandler<Ret, Args...>(eventType, wrapper);
-    }
-
-    // Remove handler by ID
-    template<typename Ret, typename... Args>
-    void removeHandler(EventType eventType, size_t id) {
-        auto key = std::make_pair(eventType, std::type_index(typeid(EventHandlerList<Ret, Args...>)));
-        auto it = handlers.find(key);
-        if (it != handlers.end()) {
-            auto* list = static_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) list->removeHandler(id);
-        }
-    }
-
-    // Invoke all handlers for an event
-    template<typename Ret, typename... Args>
-    std::vector<Ret> invokeAll(EventType eventType, Args&&... args) {
-        auto key = std::make_pair(eventType, std::type_index(typeid(EventHandlerList<Ret, Args...>)));
-        auto it = handlers.find(key);
-        // auto it = handlers.find(eventType);
-        if (it != handlers.end()) {
-            auto* list = static_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) return list->invokeAll(std::forward<Args>(args)...);
-        }
-        return {};
-    }
-
-    // Invoke a handler by ID
-    template<typename Ret, typename... Args>
-    Ret invokeById(EventType eventType, size_t id, Args&&... args) {
-        auto key = std::make_pair(eventType, std::type_index(typeid(EventHandlerList<Ret, Args...>)));
-        auto it = handlers.find(key);
-        if (it != handlers.end()) {
-            auto* list = static_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) return list->invokeById(id, std::forward<Args>(args)...);
-        }
-        throw std::runtime_error("Handler or event not found");
-    }
-
-private:
-    using HandlerKey = std::pair<EventType, std::type_index>;
-    std::map<HandlerKey, std::unique_ptr<IEventHandlerList>> handlers;
-};
-
-// Example class for reference parameter/return
-struct MyWidget {
-    int value = 42;
-    int memberFunc(int a, bool b, const char* s, MyWidget& ref) {
-        std::cout << "MyWidget::memberFunc called: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-        return value + a;
-    }
-    bool onRedraw(int a, bool b, const char* s, MyWidget& ref) {
-        std::cout << "Redraw: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-        return b;
-    }
-    int constMember(int a, bool, const char*, MyWidget&) const {
-        std::cout << "constMember: " << a << std::endl;
-        return a + 100;
-    }
-};
-
-bool freeHandler(int a, bool b, const char* s, MyWidget& ref) {
-    ref.value = 32; 
-    std::cout << "freeHandler: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-    return a > 0;
-}
-
-int main() {
-    EventDispatcher dispatcher;
-    MyWidget widget, refWidget;
-
-    // Lambda handler returning bool
-    auto id1 = dispatcher.addHandler<bool, int, bool, const char*, MyWidget&>(
-        EventType::ButtonClick,
-        [](int a, bool b, const char* s, MyWidget& ref) {
-            std::cout << "Lambda handler: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-            return b;
-        }
-    );
-
-    // Free function handler
-    auto id2 = dispatcher.addHandler(EventType::ButtonClick, freeHandler);
-
-    // Member function handler (non-const)
-    auto id3 = dispatcher.addHandler(EventType::ButtonClick, &widget, &MyWidget::onRedraw);
-
-    // Member function handler (const)
-    auto id4 = dispatcher.addHandler(EventType::Hover, &widget, &MyWidget::constMember);
-
-    // Lambda handler returning int
-    auto id5 = dispatcher.addHandler<int, int, bool, const char*,
-        MyWidget&>(EventType::Hover, [](int a, bool, const char*, MyWidget&) {
-        std::cout << "Hover handler: " << a << std::endl;
-        return a + 10;
-            }
-        );
-
-    // Member function handler returning int (non-const)
-    auto id6 = dispatcher.addHandler(EventType::Hover, &widget, &MyWidget::memberFunc);
-
-    // Lambda handler returning const char*
-    auto id7 = dispatcher.addHandler<const char*, int, bool, const char*, MyWidget&>(
-        EventType::Redraw,
-        [](int, bool, const char*, MyWidget&) {
-            return "Redraw done";
-        }
-    );
-
-    // Call all buttonClick handlers
-    std::cout << "\nInvoking all buttonClick with return bool and argument (int, bool, const char*) handlers:\n";
-    auto results = dispatcher.invokeAll<bool>(
-        EventType::ButtonClick, 5, true, "OK", refWidget);
-    for (auto r : results) std::cout << "Result: " << std::boolalpha << r << std::endl;
-
-    std::cout << "\nInvoking all with return int and argument (int bool const char*) handlers:\n";
-    auto hoverResults = dispatcher.invokeAll<int, int, bool, const char*, MyWidget&>(EventType::Hover, 7, true, "Hovering", refWidget);
-    for (auto r : hoverResults) std::cout << "Hover result: " << r << std::endl;
-
-
-    // Call a specific handler by ID
-    std::cout << "\nInvoke buttonClick by id3:\n";
-    bool res = dispatcher.invokeById<bool, int, bool, const char*, MyWidget&>(EventType::ButtonClick, id3, 2, false, "Cancel", refWidget);
-    std::cout << "Result: " << std::boolalpha << res << std::endl;
-
-
-    // Call redraw handler (returns const char*)
-    std::cout << "\nInvoking all redraw handlers:\n";
-    auto redrawResults = dispatcher.invokeAll<const char*, int, bool, const char*, MyWidget&>(EventType::Redraw, 1, false, "Redraw", refWidget);
-    for (auto r : redrawResults) std::cout << "Redraw result: " << r << std::endl;
-
-    // Remove a handler and show it's gone
-    dispatcher.removeHandler<bool, int, bool, const char*, MyWidget&>(EventType::ButtonClick, id1);
-    std::cout << "\nAfter removing lambda handler (id1):\n";
-    auto results2 = dispatcher.invokeAll<bool, int, bool, const char*, MyWidget&>(EventType::ButtonClick, 9, false, "Bye", refWidget);
-    for (auto r : results2) std::cout << "Result: " << std::boolalpha << r << std::endl;
-
-    return 0;
-};
-#endif
-
-
-#if 0
-
-// Helper for unique handler IDs
-class IdGen {
-    size_t current = 0;
-public:
-    size_t next() { return ++current; }
-};
-
-// Type-erased base for handler lists
-struct IEventHandlerList {
-    virtual ~IEventHandlerList() {}
-};
-
-// Templated handler list for a given signature
-template<typename Ret, typename... Args>
-class EventHandlerList : public IEventHandlerList {
-public:
-    using HandlerType = std::function<Ret(Args...)>;
-    struct HandlerEntry {
-        size_t id;
-        HandlerType handler;
-    };
-
-    size_t addHandler(const HandlerType& h) {
-        size_t id = idGen.next();
-        handlers.push_back({ id, h });
-        return id;
-    }
-
-    void removeHandler(size_t id) {
-        handlers.erase(std::remove_if(handlers.begin(), handlers.end(),
-            [id](const HandlerEntry& e) { return e.id == id; }), handlers.end());
-    }
-
-    std::vector<Ret> invokeAll(Args... args) {
-        std::vector<Ret> results;
-        for (auto& entry : handlers) {
-            results.push_back(entry.handler(args...));
-        }
-        return results;
-    }
-
-    Ret invokeById(size_t id, Args... args) {
-        for (auto& entry : handlers) {
-            if (entry.id == id)
-                return entry.handler(args...);
-        }
-        throw std::runtime_error("Handler ID not found");
-    }
-
-private:
-    std::vector<HandlerEntry> handlers;
-    IdGen idGen;
-};
-
-// The main dispatcher
-class EventDispatcher {
-public:
-    // Main template: add handler as std::function
-    template<typename Ret, typename... Args>
-    size_t addHandler(const std::string& eventName, std::function<Ret(Args...)> handler) {
-        auto& ptr = handlers[eventName];
-        if (!ptr) {
-            ptr.reset(new EventHandlerList<Ret, Args...>());
-        }
-        auto* list = dynamic_cast<EventHandlerList<Ret, Args...>*>(ptr.get());
-        if (!list) throw std::runtime_error("Event signature mismatch");
-        return list->addHandler(handler);
-    }
-
-    // Overload for free functions
-    template<typename Ret, typename... Args>
-    size_t addHandler(const std::string& eventName, Ret(*func)(Args...)) {
-        return addHandler<Ret, Args...>(eventName, std::function<Ret(Args...)>(func));
-    }
-
-    // Overload for non-const member functions
-    template<typename Ret, typename Class, typename... Args>
-    size_t addHandler(const std::string& eventName, Class* obj, Ret(Class::* memFn)(Args...)) {
-        auto wrapper = [obj, memFn](Args... args) -> Ret {
-            return (obj->*memFn)(args...);
-            };
-        return addHandler<Ret, Args...>(eventName, wrapper);
-    }
-
-    // Overload for const member functions
-    template<typename Ret, typename Class, typename... Args>
-    size_t addHandler(const std::string& eventName, Class* obj, Ret(Class::* memFn)(Args...) const) {
-        auto wrapper = [obj, memFn](Args... args) -> Ret {
-            return (obj->*memFn)(args...);
-            };
-        return addHandler<Ret, Args...>(eventName, wrapper);
-    }
-
-    // Remove handler by ID
-    template<typename Ret, typename... Args>
-    void removeHandler(const std::string& eventName, size_t id) {
-        auto it = handlers.find(eventName);
-        if (it != handlers.end()) {
-            auto* list = dynamic_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) list->removeHandler(id);
-        }
-    }
-
-    // Invoke all handlers for an event
-    template<typename Ret, typename... Args>
-    std::vector<Ret> invokeAll(const std::string& eventName, Args... args) {
-        auto it = handlers.find(eventName);
-        if (it != handlers.end()) {
-            auto* list = dynamic_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) return list->invokeAll(args...);
-        }
-        return {};
-    }
-
-    // Invoke a handler by ID
-    template<typename Ret, typename... Args>
-    Ret invokeById(const std::string& eventName, size_t id, Args... args) {
-        auto it = handlers.find(eventName);
-        if (it != handlers.end()) {
-            auto* list = dynamic_cast<EventHandlerList<Ret, Args...>*>(it->second.get());
-            if (list) return list->invokeById(id, args...);
-        }
-        throw std::runtime_error("Handler or event not found");
-    }
-
-private:
-    std::map<std::string, std::unique_ptr<IEventHandlerList>> handlers;
-};
-
-// Example class for reference parameter/return
-struct MyWidget {
-    int value = 42;
-    int memberFunc(int a, bool b, const char* s, MyWidget& ref) {
-        std::cout << "MyWidget::memberFunc called: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-        return value + a;
-    }
-    bool onRedraw(int a, bool b, const char* s, MyWidget& ref) {
-        std::cout << "Redraw: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-        return b;
-    }
-    int constMember(int a, bool, const char*, MyWidget&) const {
-        std::cout << "constMember: " << a << std::endl;
-        return a + 100;
-    }
-};
-
-bool freeHandler(int a, bool b, const char* s, MyWidget& ref) {
-    std::cout << "freeHandler: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-    return a > 0;
-}
-
-int main() {
-    EventDispatcher dispatcher;
-    MyWidget widget, refWidget;
-
-    // Lambda handler returning bool
-    auto id1 = dispatcher.addHandler<bool, int, bool, const char*, MyWidget&>(
-        "buttonClick",
-        [](int a, bool b, const char* s, MyWidget& ref) {
-            std::cout << "Lambda handler: " << a << ", " << b << ", " << s << ", ref.value=" << ref.value << std::endl;
-            return b;
-        }
-    );
-
-    // Free function handler
-    auto id2 = dispatcher.addHandler("buttonClick", freeHandler);
-
-    // Member function handler (non-const)
-    auto id3 = dispatcher.addHandler("buttonClick", &widget, &MyWidget::onRedraw);
-
-    // Member function handler (const)
-    auto id4 = dispatcher.addHandler("hover", &widget, &MyWidget::constMember);
-
-    // Lambda handler returning int
-    auto id5 = dispatcher.addHandler<int, int, bool, const char*, MyWidget&>(
-        "hover",
-        [](int a, bool, const char*, MyWidget&) {
-            std::cout << "Hover handler: " << a << std::endl;
-            return a + 10;
-        }
-    );
-
-    // Member function handler returning int (non-const)
-    auto id6 = dispatcher.addHandler("hover", &widget, &MyWidget::memberFunc);
-
-    // Lambda handler returning const char*
-    auto id7 = dispatcher.addHandler<const char*, int, bool, const char*, MyWidget&>(
-        "redraw",
-        [](int, bool, const char*, MyWidget&) {
-            return "Redraw done";
-        }
-    );
-
-    // Call all buttonClick handlers
-    std::cout << "\nInvoking all buttonClick handlers:\n";
-    auto results = dispatcher.invokeAll<bool, int, bool, const char*, MyWidget&>("buttonClick", 5, true, "OK", refWidget);
-    for (auto r : results) std::cout << "Result: " << std::boolalpha << r << std::endl;
-
-    // Call a specific handler by ID
-    std::cout << "\nInvoke buttonClick by id3:\n";
-    bool res = dispatcher.invokeById<bool, int, bool, const char*, MyWidget&>("buttonClick", id3, 2, false, "Cancel", refWidget);
-    std::cout << "Result: " << std::boolalpha << res << std::endl;
-
-    auto hoverResults = dispatcher.invokeAll<int, int, bool, const char*, MyWidget&>("hover", 7, true, "Hovering", refWidget);
-    for (auto r : hoverResults) std::cout << "Hover result: " << r << std::endl;
-
-    // Call redraw handler (returns const char*)
-    std::cout << "\nInvoking all redraw handlers:\n";
-    auto redrawResults = dispatcher.invokeAll<const char*, int, bool, const char*, MyWidget&>("redraw", 1, false, "Redraw", refWidget);
-    for (auto r : redrawResults) std::cout << "Redraw result: " << r << std::endl;
-
-    // Remove a handler and show it's gone
-    dispatcher.removeHandler<bool, int, bool, const char*, MyWidget&>("buttonClick", id1);
-    std::cout << "\nAfter removing lambda handler (id1):\n";
-    auto results2 = dispatcher.invokeAll<bool, int, bool, const char*, MyWidget&>("buttonClick", 9, false, "Bye", refWidget);
-    for (auto r : results2) std::cout << "Result: " << std::boolalpha << r << std::endl;
-
-    return 0;
-}
-#endif