Updatable.h

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// Copyright (c) 2025 Dave R. Smith.
// Malena Framework — Licensed under PolyForm Noncommercial 1.0.0; commercial use requires a paid license. See LICENSE.
 
//
// Updatable.h
//
 
#pragma once
#include <Malena/Core/malena_export.h>
#include <Malena/Engine/Events/Fireable.h>
#include <Malena/Engine/Events/EventReceiver.h>
#include <Malena/Engine/Events/FrameDispatcher.h>
#include <functional>
#include <optional>
#include <SFML/Window/Event.hpp>
 
namespace ml
{
    class MALENA_API Updatable : public EventReceiver
    {
    public:
        // ── Per-frame ─────────────────────────────────────────────────────────

        void onUpdate(std::function<void()> callback, bool overwrite = false);

        void onUpdate(std::function<void(const std::optional<sf::Event>&)> callback, bool overwrite = false);
 
        // ── Window events ─────────────────────────────────────────────────────

        void onWindowResized(std::function<void()> callback, bool overwrite = false);

        void onWindowResized(std::function<void(const std::optional<sf::Event>&)> callback, bool overwrite = false);

        void onWindowFocusGained(std::function<void()> callback, bool overwrite = false);

        void onWindowFocusGained(std::function<void(const std::optional<sf::Event>&)> callback, bool overwrite = false);

        void onWindowFocusLost(std::function<void()> callback, bool overwrite = false);

        void onWindowFocusLost(std::function<void(const std::optional<sf::Event>&)> callback, bool overwrite = false);
    };

    class MALENA_API UpdatableDispatcher : public FrameDispatcher
    {
    public:
        bool filter(const std::optional<sf::Event>& event, Core* component) override { return true; }
        void fire() override;
        bool occurred() override { return true; }
    };
 
} // namespace ml
 
ML_EXPORT(UpdatableDispatcher)