hdk-sdl/include/hdk/sdl/event.hpp

#pragma once
/// @file event.hpp
/// For complete documentation, see src/event.cpp
#include <SDL3/SDL_events.h>
#include <SDL3/SDL_init.h>
#include <hdk/grid/EPS.hpp>
#include <hdk/sdl/video/Window.hpp>
#include <cstdio>
#include <map>
#include <string>

namespace hdk::sdl {
  class Event {
  public:
      static void AddWatch(SDL_EventFilter filter, void* userdata) { SDL_AddEventWatch(filter, userdata); }
      static bool EventEnabled(Uint32 type) { return SDL_EventEnabled(type); }
      static void FilterEvents(SDL_EventFilter filter, void* userdata) { SDL_FilterEvents(filter, userdata); }
      static void FlushEvent(Uint32 type) { SDL_FlushEvent(type); }
      static void FlushEvents(Uint32 min_type, Uint32 max_type) { SDL_FlushEvents(min_type, max_type); }
      static int GetDescription(const SDL_Event* event, char* buf, int buflen) {
        return SDL_GetEventDescription(event, buf, buflen);
      }
      static std::string GetDescription(const SDL_Event* event) {
        char buf[256];
        GetDescription(event, buf, sizeof(buf));
        return std::string(buf);
      }
      static bool GetFilter(SDL_EventFilter* filter, void** userdata) { return SDL_GetEventFilter(filter, userdata); }
      static Window GetWindowFromEvent(const SDL_Event* event) {
        return Window::get_or_view(SDL_GetWindowFromEvent(event));
      }
      static bool Has(Uint32 type) { return SDL_HasEvent(type); }
      static bool Has(Uint32 min_type, Uint32 max_type) { return SDL_HasEvents(min_type, max_type); }
      static int Peep(SDL_Event* events, int numevents, SDL_EventAction action, Uint32 min_type, Uint32 max_type) {
        return SDL_PeepEvents(events, numevents, action, min_type, max_type);
      }
      static bool Poll(SDL_Event* event) { return SDL_PollEvent(event); }
      static void Pump() { SDL_PumpEvents(); }
      static bool Push(SDL_Event* event) { return SDL_PushEvent(event); }
      template <int BUFLEN = 512> static std::string GetDescription(const SDL_Event* event) {
        char buf[BUFLEN];
        int actual_length = SDL_GetEventDescription(event, buf, sizeof(buf));
        if (actual_length > BUFLEN) {
          return std::string("BUFFER TOO SMALL");
        }
        return std::string(buf);
      }
  };

}

namespace hdk::sdl::evt {

  class EventConduit : public hdk::grid::eps::Conduit<SDL_Event*> {
    public:
      using hdk::grid::eps::Conduit<SDL_Event*>::Conduit;
  };

  template <typename ValueType, typename EventType = EventConduit,
    typename MapType = std::map<ValueType, EventType*>>
  class EventValueRouter : public EventConduit {
    public:
      // The type of the map of values to dispatch (for child classes to use)
      typedef MapType value_dispatch_map_t;
      // The map of values to dispatch to
      value_dispatch_map_t value_dispatch_map;
      // Constructor takes a map of values to dispatch to
      EventValueRouter(value_dispatch_map_t dispatch_map)
        : value_dispatch_map(dispatch_map) { }
      // The extractor function is a pure virtual function that child classes must implement to extract the value from
      // the event
      virtual ValueType extractor(SDL_Event* event) const = 0;
      // The Trigger function overrides the base Event Trigger function to extract the value from the event and dispatch
      // to the appropriate callback based on that value, as well as triggering any callbacks in the base Event dispatch
      // list.
      virtual void Trigger(SDL_Event* event) const override {
        if (!event)
          return;
        ValueType value = this->extractor(event);
        auto it = value_dispatch_map.find(value);
        if (it != value_dispatch_map.end() && it->second) {
          (*it->second)(event);
        } else {
          return;
        }
        EventConduit::Trigger(event);
      }
      // Allow direct access to the dispatch map for subscribing to specific values
      EventType& operator[](ValueType value) { return *value_dispatch_map[value]; }
  };

  class EventTypeRouter
    : public EventValueRouter<SDL_EventType, EventConduit, std::map<SDL_EventType, EventConduit*>> {
    public:
      EventTypeRouter(value_dispatch_map_t dispatch_map)
        : EventValueRouter(std::move(dispatch_map)) { }
      virtual SDL_EventType extractor(SDL_Event* event) const override { return (SDL_EventType)event->type; }
  };

  class DisplayEvents : public EventTypeRouter {
    public:
      EventConduit Orientation, Added, Removed, Moved, DesktopModeChanged, CurrentModeChanged, ContentScaleChanged;
      DisplayEvents()
        : EventTypeRouter({ { SDL_EVENT_DISPLAY_ORIENTATION, &Orientation }, { SDL_EVENT_DISPLAY_ADDED, &Added },
            { SDL_EVENT_DISPLAY_REMOVED, &Removed }, { SDL_EVENT_DISPLAY_MOVED, &Moved },
            { SDL_EVENT_DISPLAY_DESKTOP_MODE_CHANGED, &DesktopModeChanged },
            { SDL_EVENT_DISPLAY_CURRENT_MODE_CHANGED, &CurrentModeChanged },
            { SDL_EVENT_DISPLAY_CONTENT_SCALE_CHANGED, &ContentScaleChanged } }) { }
  };

  class KeyEvents : public EventTypeRouter {
    public:
      EventConduit Down, Up;
      KeyEvents()
        : EventTypeRouter({ { SDL_EVENT_KEY_DOWN, &Down }, { SDL_EVENT_KEY_UP, &Up } }) { };
  };

  class KeysEvents : public EventValueRouter<SDL_Keycode, KeyEvents> {
    public:
      KeysEvents()
        : EventValueRouter({}) { }
      virtual SDL_Keycode extractor(SDL_Event* event) const override { return event->key.key; }
  };

  class JoystickAxisEvents : public EventValueRouter<Uint8> {
    public:
      JoystickAxisEvents()
        : EventValueRouter({}) { }
      virtual Uint8 extractor(SDL_Event* event) const override { return event->jaxis.axis; }
  };

  class JoystickBallEvents : public EventValueRouter<Uint8> {
    public:
      JoystickBallEvents()
        : EventValueRouter({}) { }
      virtual Uint8 extractor(SDL_Event* event) const override { return event->jball.ball; }
  };

  class JoystickHatEvents : public EventValueRouter<Uint8> {
    public:
      JoystickHatEvents()
        : EventValueRouter({}) { }
      virtual Uint8 extractor(SDL_Event* event) const override { return event->jhat.hat; }
  };

  class JoystickButtonEvents : public EventTypeRouter {
    public:
      EventConduit Down, Up;
      JoystickButtonEvents()
        : EventTypeRouter({ { SDL_EVENT_JOYSTICK_BUTTON_DOWN, &Down }, { SDL_EVENT_JOYSTICK_BUTTON_UP, &Up } }) { }
  };

  class JoystickButtonsEvents : public EventValueRouter<Uint8, JoystickButtonEvents> {
    public:
      JoystickButtonsEvents()
        : EventValueRouter({}) { }
      virtual Uint8 extractor(SDL_Event* event) const override { return event->jbutton.button; }
  };

  class JoystickEvents : public EventTypeRouter {
    public:
    JoystickAxisEvents AxisMotion;
      JoystickBallEvents BallMotion;
      JoystickHatEvents HatMotion;
      JoystickButtonsEvents Button;
      EventConduit Added, Removed, BatteryUpdated, UpdateComplete;
      JoystickEvents()
        : EventTypeRouter({ { SDL_EVENT_JOYSTICK_AXIS_MOTION, &AxisMotion },
            { SDL_EVENT_JOYSTICK_BALL_MOTION, &BallMotion }, { SDL_EVENT_JOYSTICK_HAT_MOTION, &HatMotion },
            { SDL_EVENT_JOYSTICK_BUTTON_DOWN, &Button }, { SDL_EVENT_JOYSTICK_BUTTON_UP, &Button },
            { SDL_EVENT_JOYSTICK_ADDED, &Added }, { SDL_EVENT_JOYSTICK_REMOVED, &Removed },
            { SDL_EVENT_JOYSTICK_BATTERY_UPDATED, &BatteryUpdated },
            { SDL_EVENT_JOYSTICK_UPDATE_COMPLETE, &UpdateComplete } }) { }
  };

  class JoysticksEvents : public EventValueRouter<SDL_JoystickID, JoystickEvents> {
    public:
      JoysticksEvents()
        : EventValueRouter({}) { }
      virtual SDL_JoystickID extractor(SDL_Event* event) const override {
        switch (event->type) {
        case SDL_EVENT_JOYSTICK_AXIS_MOTION:
          return event->jaxis.which;
        case SDL_EVENT_JOYSTICK_BALL_MOTION:
          return event->jball.which;
        case SDL_EVENT_JOYSTICK_HAT_MOTION:
          return event->jhat.which;
        case SDL_EVENT_JOYSTICK_BUTTON_DOWN:
        case SDL_EVENT_JOYSTICK_BUTTON_UP:
          return event->jbutton.which;
        case SDL_EVENT_JOYSTICK_ADDED:
        case SDL_EVENT_JOYSTICK_REMOVED:
        case SDL_EVENT_JOYSTICK_BATTERY_UPDATED:
        case SDL_EVENT_JOYSTICK_UPDATE_COMPLETE:
          return event->jdevice.which;
        default:
          return -1; // Invalid ID for unsupported event types
        }
      }
  };

  class GamepadAxisEvents : public EventValueRouter<SDL_GamepadAxis> {
    public:
      GamepadAxisEvents()
        : EventValueRouter({}) { }
      virtual SDL_GamepadAxis extractor(SDL_Event* event) const override { return (SDL_GamepadAxis)event->gaxis.axis; }
  };

  class GamepadButtonEvents : public EventTypeRouter {
    public:
      EventConduit Down, Up;
      GamepadButtonEvents()
        : EventTypeRouter({ { SDL_EVENT_GAMEPAD_BUTTON_DOWN, &Down }, { SDL_EVENT_GAMEPAD_BUTTON_UP, &Up } }) { }
  };

  class GamepadButtonsEvents : public EventValueRouter<SDL_GamepadButton, GamepadButtonEvents> {
    public:
      GamepadButtonsEvents()
        : EventValueRouter({}) { }
      virtual SDL_GamepadButton extractor(SDL_Event* event) const override {
        return (SDL_GamepadButton)event->gbutton.button;
      }
  };

  class GamepadTouchpadEvents : public EventTypeRouter {
    public:
      EventConduit Down, Motion, Up;
      GamepadTouchpadEvents()
        : EventTypeRouter({ { SDL_EVENT_GAMEPAD_TOUCHPAD_DOWN, &Down },
            { SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION, &Motion }, { SDL_EVENT_GAMEPAD_TOUCHPAD_UP, &Up } }) { }
  };

  class GamepadEvents : public EventTypeRouter {
    public:
      GamepadAxisEvents AxisMotion;
      GamepadButtonsEvents Button;
      EventConduit Added, Removed, Remapped;
      GamepadTouchpadEvents Touchpad;
      EventConduit SensorUpdate, UpdateComplete, SteamHandleUpdate;

      GamepadEvents()
        : EventTypeRouter({ { SDL_EVENT_GAMEPAD_AXIS_MOTION, &AxisMotion }, { SDL_EVENT_GAMEPAD_BUTTON_DOWN, &Button },
            { SDL_EVENT_GAMEPAD_BUTTON_UP, &Button }, { SDL_EVENT_GAMEPAD_ADDED, &Added },
            { SDL_EVENT_GAMEPAD_REMOVED, &Removed }, { SDL_EVENT_GAMEPAD_REMAPPED, &Remapped },
            { SDL_EVENT_GAMEPAD_TOUCHPAD_DOWN, &Touchpad }, { SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION, &Touchpad },
            { SDL_EVENT_GAMEPAD_TOUCHPAD_UP, &Touchpad }, { SDL_EVENT_GAMEPAD_SENSOR_UPDATE, &SensorUpdate },
            { SDL_EVENT_GAMEPAD_UPDATE_COMPLETE, &UpdateComplete } }) {
      }
  };

  class GamepadsEvents : public EventValueRouter<SDL_JoystickID, GamepadEvents> {
    public:
      GamepadsEvents()
        : EventValueRouter({}) { }
      virtual SDL_JoystickID extractor(SDL_Event* event) const override {
        switch (event->type) {
        case SDL_EVENT_GAMEPAD_AXIS_MOTION:
          return event->gaxis.which;
        case SDL_EVENT_GAMEPAD_BUTTON_DOWN:
        case SDL_EVENT_GAMEPAD_BUTTON_UP:
          return event->gbutton.which;
        case SDL_EVENT_GAMEPAD_ADDED:
        case SDL_EVENT_GAMEPAD_REMOVED:
        case SDL_EVENT_GAMEPAD_REMAPPED:
          return event->gdevice.which;
        case SDL_EVENT_GAMEPAD_TOUCHPAD_DOWN:
        case SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION:
        case SDL_EVENT_GAMEPAD_TOUCHPAD_UP:
          return event->gtouchpad.which;
        case SDL_EVENT_GAMEPAD_SENSOR_UPDATE:
        case SDL_EVENT_GAMEPAD_UPDATE_COMPLETE:
        case SDL_EVENT_GAMEPAD_STEAM_HANDLE_UPDATED:
          return event->gsensor.which;
        default:
          return -1; // Invalid ID for unsupported event types
        }
      }
  };

  class FingerEvents : public EventTypeRouter {
    public:
      EventConduit Down, Up, Motion, Canceled;
      FingerEvents()
        : EventTypeRouter({ { SDL_EVENT_FINGER_DOWN, &Down }, { SDL_EVENT_FINGER_UP, &Up },
            { SDL_EVENT_FINGER_MOTION, &Motion }, { SDL_EVENT_FINGER_CANCELED, &Canceled } }) { }
  };

  class DropEvents : public EventTypeRouter {
    public:
      EventConduit File, Text, Begin, Complete;
      DropEvents()
        : EventTypeRouter({ { SDL_EVENT_DROP_FILE, &File }, { SDL_EVENT_DROP_TEXT, &Text },
            { SDL_EVENT_DROP_BEGIN, &Begin }, { SDL_EVENT_DROP_COMPLETE, &Complete } }) { }
  };

  class AudioDeviceEvents : public EventTypeRouter {
    public:
      EventConduit Added, Removed, FormatChanged;
      AudioDeviceEvents()
        : EventTypeRouter({ { SDL_EVENT_AUDIO_DEVICE_ADDED, &Added }, { SDL_EVENT_AUDIO_DEVICE_REMOVED, &Removed },
            { SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED, &FormatChanged } }) {
      }
  };

  class PenEvents : public EventTypeRouter {
    public:
      EventConduit ProximityIn, ProximityOut, Down, Up, Motion;
      PenEvents()
        : EventTypeRouter({ { SDL_EVENT_PEN_PROXIMITY_IN, &ProximityIn }, { SDL_EVENT_PEN_PROXIMITY_OUT, &ProximityOut },
            { SDL_EVENT_PEN_DOWN, &Down }, { SDL_EVENT_PEN_UP, &Up }, { SDL_EVENT_PEN_MOTION, &Motion } }) { }
  };

  class CameraDeviceEvents : public EventTypeRouter {
    public:
      EventConduit Added, Removed, Approved, Denied;
      CameraDeviceEvents()
        : EventTypeRouter({ { SDL_EVENT_CAMERA_DEVICE_ADDED, &Added }, { SDL_EVENT_CAMERA_DEVICE_REMOVED, &Removed },
            { SDL_EVENT_CAMERA_DEVICE_APPROVED, &Approved }, { SDL_EVENT_CAMERA_DEVICE_DENIED, &Denied } }) {
      }
  };

  class RenderEvents : public EventTypeRouter {
    public:
      EventConduit TargetsReset, DeviceReset, DeviceLost;
      RenderEvents()
        : EventTypeRouter({ { SDL_EVENT_RENDER_TARGETS_RESET, &TargetsReset },
            { SDL_EVENT_RENDER_DEVICE_RESET, &DeviceReset }, { SDL_EVENT_RENDER_DEVICE_LOST, &DeviceLost } }) { }
  };

  class KeyboardEvents : public EventTypeRouter {
    public:
      EventConduit Added, Removed;
      KeyboardEvents()
        : EventTypeRouter({ { SDL_EVENT_KEYBOARD_ADDED, &Added }, { SDL_EVENT_KEYBOARD_REMOVED, &Removed } }) { }
  };

  class MouseButtonEvents : public EventTypeRouter {
    public:
      EventConduit Down, Up;
      MouseButtonEvents()
        : EventTypeRouter({ { SDL_EVENT_MOUSE_BUTTON_DOWN, &Down }, { SDL_EVENT_MOUSE_BUTTON_UP, &Up } }) { }
  };

  class MouseButtonsEvents : public EventValueRouter<Uint8, MouseButtonEvents> {
    public:
      MouseButtonsEvents()
        : EventValueRouter({}) { }
      virtual Uint8 extractor(SDL_Event* event) const override { return event->button.button; }
  };

  class MouseEvents : public EventTypeRouter {
    public:
      MouseButtonsEvents Button;
      EventConduit Motion, Wheel, Added, Removed;
      MouseEvents()
        : EventTypeRouter({ { SDL_EVENT_MOUSE_MOTION, &Motion }, { SDL_EVENT_MOUSE_BUTTON_DOWN, &Button },
            { SDL_EVENT_MOUSE_BUTTON_UP, &Button }, { SDL_EVENT_MOUSE_WHEEL, &Wheel },
            { SDL_EVENT_MOUSE_ADDED, &Added }, { SDL_EVENT_MOUSE_REMOVED, &Removed } }) { }
  };

  class MiceEvents : public EventValueRouter<SDL_MouseID, MouseEvents> {
    public:
      MiceEvents()
        : EventValueRouter({}) { }
      virtual SDL_MouseID extractor(SDL_Event* event) const override {
        switch (event->type) {
        case SDL_EVENT_MOUSE_MOTION:
          return event->motion.which;
        case SDL_EVENT_MOUSE_BUTTON_DOWN:
        case SDL_EVENT_MOUSE_BUTTON_UP:
          return event->button.which;
        case SDL_EVENT_MOUSE_WHEEL:
          return event->wheel.which;
        case SDL_EVENT_MOUSE_ADDED:
        case SDL_EVENT_MOUSE_REMOVED:
          return event->mdevice.which;
        default:
          return -1; // Invalid ID for unsupported event types
        }
      }
  };

  class TextEvents : public EventTypeRouter {
    public:
      EventConduit Input, Editing, EditingCandidates;
      TextEvents()
        : EventTypeRouter({ { SDL_EVENT_TEXT_INPUT, &Input }, { SDL_EVENT_TEXT_EDITING, &Editing },
            { SDL_EVENT_TEXT_EDITING_CANDIDATES, &EditingCandidates } }) { }
  };

  class WindowEvents : public EventTypeRouter {
    public:
      EventConduit Shown, Hidden, Exposed, Moved, Resized, PixelSizeChanged, MetalViewResized, Minimized, Maximized, Restored,
        MouseEnter, MouseLeave, FocusLost, CloseRequested, HitTest, ICCProfChange, DisplayChanged, DisplayScaleChanged,
        SafeAreaChanged, Occluded, EnterFullscreen, LeaveFullscreen, LeaveDesktop, TakeFocus, HitTestResult, Destroyed,
        HdrStateChanged;

      // @todo possibly refactor to a specialized subclass,
      // these are not "WINDOW" events; but events that identify "WindowID",
      // and so we dispatch them to handlers for that window so that each window can have its own
      // unified set of handlers.
      FingerEvents Finger;
      PenEvents Pen;
      MiceEvents Mouse;
        KeysEvents Key;
      TextEvents Text;
      DropEvents Drop;
      RenderEvents Render;
      WindowEvents()
        : EventTypeRouter({ { SDL_EVENT_WINDOW_SHOWN, &Shown }, { SDL_EVENT_WINDOW_HIDDEN, &Hidden },
            { SDL_EVENT_WINDOW_EXPOSED, &Exposed }, { SDL_EVENT_WINDOW_MOVED, &Moved },
            { SDL_EVENT_WINDOW_RESIZED, &Resized }, { SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED, &PixelSizeChanged },
            { SDL_EVENT_WINDOW_METAL_VIEW_RESIZED, &MetalViewResized }, { SDL_EVENT_WINDOW_MINIMIZED, &Minimized },
            { SDL_EVENT_WINDOW_MAXIMIZED, &Maximized }, { SDL_EVENT_WINDOW_RESTORED, &Restored },
            { SDL_EVENT_WINDOW_MOUSE_ENTER, &MouseEnter }, { SDL_EVENT_WINDOW_MOUSE_LEAVE, &MouseLeave },
            { SDL_EVENT_WINDOW_FOCUS_LOST, &FocusLost }, { SDL_EVENT_WINDOW_CLOSE_REQUESTED, &CloseRequested },
            { SDL_EVENT_WINDOW_HIT_TEST, &HitTest }, { SDL_EVENT_WINDOW_ICCPROF_CHANGED, &ICCProfChange },
            { SDL_EVENT_WINDOW_DISPLAY_CHANGED, &DisplayChanged },
            { SDL_EVENT_WINDOW_DISPLAY_SCALE_CHANGED, &DisplayScaleChanged },
            { SDL_EVENT_WINDOW_SAFE_AREA_CHANGED, &SafeAreaChanged }, { SDL_EVENT_WINDOW_OCCLUDED, &Occluded },
            { SDL_EVENT_WINDOW_ENTER_FULLSCREEN, &EnterFullscreen },
            { SDL_EVENT_WINDOW_LEAVE_FULLSCREEN, &LeaveFullscreen }, { SDL_EVENT_WINDOW_DESTROYED, &Destroyed },
            { SDL_EVENT_WINDOW_HDR_STATE_CHANGED, &HdrStateChanged }, { SDL_EVENT_FINGER_DOWN, &Finger },
            { SDL_EVENT_FINGER_UP, &Finger }, { SDL_EVENT_FINGER_MOTION, &Finger },
            { SDL_EVENT_FINGER_CANCELED, &Finger }, { SDL_EVENT_PEN_MOTION, &Pen },
            { SDL_EVENT_PEN_BUTTON_DOWN, &Pen }, { SDL_EVENT_PEN_BUTTON_UP, &Pen }, { SDL_EVENT_PEN_AXIS, &Pen },
            { SDL_EVENT_MOUSE_WHEEL, &Mouse }, { SDL_EVENT_MOUSE_MOTION, &Mouse },
            { SDL_EVENT_MOUSE_BUTTON_DOWN, &Mouse }, { SDL_EVENT_MOUSE_BUTTON_UP, &Mouse },
            { SDL_EVENT_KEY_DOWN, &Key }, { SDL_EVENT_KEY_UP, &Key }, { SDL_EVENT_PEN_PROXIMITY_IN, &Pen },
            { SDL_EVENT_PEN_PROXIMITY_OUT, &Pen }, { SDL_EVENT_PEN_DOWN, &Pen }, { SDL_EVENT_PEN_UP, &Pen },
            { SDL_EVENT_TEXT_INPUT, &Text }, { SDL_EVENT_TEXT_EDITING, &Text },
            { SDL_EVENT_TEXT_EDITING_CANDIDATES, &Text }, { SDL_EVENT_RENDER_TARGETS_RESET, &Render },
            { SDL_EVENT_RENDER_DEVICE_RESET, &Render }, { SDL_EVENT_RENDER_DEVICE_LOST, &Render },
            { SDL_EVENT_DROP_BEGIN, &Drop }, { SDL_EVENT_DROP_FILE, &Drop }, { SDL_EVENT_DROP_TEXT, &Drop },
            { SDL_EVENT_DROP_COMPLETE, &Drop }, { SDL_EVENT_DROP_POSITION, &Drop } }) { }
  };

  class WindowsEvents : public EventValueRouter<SDL_WindowID, WindowEvents> {
    public:
      std::map<SDL_WindowID, WindowEvents> windows;
      WindowsEvents()
        : EventValueRouter({}) { }
      WindowEvents& operator[](SDL_WindowID window_id) {
        WindowEvents& window = windows[window_id];
        value_dispatch_map[window_id] = &window;
        return window;
      }
      virtual SDL_WindowID extractor(SDL_Event* event) const override {
        switch (event->type) {
        case SDL_EVENT_WINDOW_SHOWN:
        case SDL_EVENT_WINDOW_HIDDEN:
        case SDL_EVENT_WINDOW_EXPOSED:
        case SDL_EVENT_WINDOW_MOVED:
        case SDL_EVENT_WINDOW_RESIZED:
        case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED:
        case SDL_EVENT_WINDOW_METAL_VIEW_RESIZED:
        case SDL_EVENT_WINDOW_MINIMIZED:
        case SDL_EVENT_WINDOW_MAXIMIZED:
        case SDL_EVENT_WINDOW_RESTORED:
        case SDL_EVENT_WINDOW_MOUSE_ENTER:
        case SDL_EVENT_WINDOW_MOUSE_LEAVE:
        case SDL_EVENT_WINDOW_FOCUS_GAINED:
        case SDL_EVENT_WINDOW_FOCUS_LOST:
        case SDL_EVENT_WINDOW_CLOSE_REQUESTED:
        case SDL_EVENT_WINDOW_HIT_TEST:
        case SDL_EVENT_WINDOW_ICCPROF_CHANGED:
        case SDL_EVENT_WINDOW_DISPLAY_CHANGED:
        case SDL_EVENT_WINDOW_DISPLAY_SCALE_CHANGED:
        case SDL_EVENT_WINDOW_SAFE_AREA_CHANGED:
        case SDL_EVENT_WINDOW_OCCLUDED:
        case SDL_EVENT_WINDOW_ENTER_FULLSCREEN:
        case SDL_EVENT_WINDOW_LEAVE_FULLSCREEN:
        case SDL_EVENT_WINDOW_DESTROYED:
          return event->window.windowID;

        case SDL_EVENT_FINGER_DOWN:
        case SDL_EVENT_FINGER_UP:
        case SDL_EVENT_FINGER_MOTION:
        case SDL_EVENT_FINGER_CANCELED:
          return event->tfinger.windowID;

        case SDL_EVENT_PEN_BUTTON_DOWN:
        case SDL_EVENT_PEN_BUTTON_UP:
          return event->pbutton.windowID;

        case SDL_EVENT_PEN_AXIS:
          return event->paxis.windowID;

        case SDL_EVENT_MOUSE_WHEEL:
          return event->wheel.windowID;
        case SDL_EVENT_MOUSE_MOTION:
          return event->motion.windowID;

        case SDL_EVENT_MOUSE_BUTTON_DOWN:
        case SDL_EVENT_MOUSE_BUTTON_UP:
          return event->button.windowID;

        case SDL_EVENT_KEY_DOWN:
        case SDL_EVENT_KEY_UP:
          return event->key.windowID;

        case SDL_EVENT_PEN_PROXIMITY_IN:
        case SDL_EVENT_PEN_PROXIMITY_OUT:
          return event->pproximity.windowID;

        case SDL_EVENT_PEN_DOWN:
        case SDL_EVENT_PEN_UP:
          return event->ptouch.windowID;

        case SDL_EVENT_TEXT_INPUT:
          return event->text.windowID;

        case SDL_EVENT_TEXT_EDITING:
          return event->edit.windowID;

        case SDL_EVENT_TEXT_EDITING_CANDIDATES:
          return event->edit_candidates.windowID;

        case SDL_EVENT_RENDER_TARGETS_RESET:
        case SDL_EVENT_RENDER_DEVICE_RESET:
        case SDL_EVENT_RENDER_DEVICE_LOST:
          return event->render.windowID;

        case SDL_EVENT_DROP_BEGIN:
        case SDL_EVENT_DROP_FILE:
        case SDL_EVENT_DROP_TEXT:
        case SDL_EVENT_DROP_COMPLETE:
        case SDL_EVENT_DROP_POSITION:
          return event->drop.windowID;

        default:
          if (event->type >= SDL_EVENT_USER && event->type <= SDL_EVENT_LAST) {
            // User events may have a windowID, but it's not guaranteed, so we check for it here
            return event->user.windowID;
          }
        }
        return 0;
      }
  };

  class AllTypes : public EventTypeRouter {
    public:
      EventConduit Quit, Terminating, LowMemory, WillEnterBackground, DidEnterBackground, WillEnterForeground, LocaleChanged,
        SystemThemeChanged;
      DisplayEvents Display;
      WindowsEvents Window;
      TextEvents Text;
      EventConduit KeymapChanged;
      KeysEvents Key;
      KeyboardEvents Keyboard;
      MiceEvents Mouse;
      JoysticksEvents Joystick;
      GamepadsEvents Gamepad;
      FingerEvents Finger;
      EventConduit ClipboardUpdate;
      DropEvents Drop;
      AudioDeviceEvents AudioDevice;
      EventConduit SensorUpdate;
      PenEvents Pen;
      CameraDeviceEvents CameraDevice;
      /* Render Events */
      RenderEvents Render;
      AllTypes()
        // https://wiki.libsdl.org/SDL3/SDL_EventType
        : EventTypeRouter({ { SDL_EVENT_QUIT, &Quit }, { SDL_EVENT_TERMINATING, &Terminating },
            { SDL_EVENT_LOW_MEMORY, &LowMemory }, { SDL_EVENT_WILL_ENTER_BACKGROUND, &WillEnterBackground },
            { SDL_EVENT_DID_ENTER_BACKGROUND, &DidEnterBackground },
            { SDL_EVENT_WILL_ENTER_FOREGROUND, &WillEnterForeground }, { SDL_EVENT_LOCALE_CHANGED, &LocaleChanged },
            { SDL_EVENT_SYSTEM_THEME_CHANGED, &SystemThemeChanged }, { SDL_EVENT_DISPLAY_ORIENTATION, &Display },
            { SDL_EVENT_DISPLAY_ADDED, &Display }, { SDL_EVENT_DISPLAY_REMOVED, &Display },
            { SDL_EVENT_DISPLAY_MOVED, &Display }, { SDL_EVENT_DISPLAY_DESKTOP_MODE_CHANGED, &Display },
            { SDL_EVENT_DISPLAY_CURRENT_MODE_CHANGED, &Display }, { SDL_EVENT_DISPLAY_CONTENT_SCALE_CHANGED, &Display },
            { SDL_EVENT_WINDOW_SHOWN, &Window }, { SDL_EVENT_WINDOW_HIDDEN, &Window },
            { SDL_EVENT_WINDOW_EXPOSED, &Window }, { SDL_EVENT_WINDOW_MOVED, &Window },
            { SDL_EVENT_WINDOW_RESIZED, &Window }, { SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED, &Window },
            { SDL_EVENT_WINDOW_METAL_VIEW_RESIZED, &Window }, { SDL_EVENT_WINDOW_MINIMIZED, &Window },
            { SDL_EVENT_WINDOW_MAXIMIZED, &Window }, { SDL_EVENT_WINDOW_RESTORED, &Window },
            { SDL_EVENT_WINDOW_MOUSE_ENTER, &Window }, { SDL_EVENT_WINDOW_MOUSE_LEAVE, &Window },
            { SDL_EVENT_WINDOW_FOCUS_LOST, &Window }, { SDL_EVENT_WINDOW_CLOSE_REQUESTED, &Window },
            { SDL_EVENT_WINDOW_HIT_TEST, &Window }, { SDL_EVENT_WINDOW_ICCPROF_CHANGED, &Window },
            { SDL_EVENT_WINDOW_DISPLAY_CHANGED, &Window }, { SDL_EVENT_WINDOW_DISPLAY_SCALE_CHANGED, &Window },
            { SDL_EVENT_WINDOW_SAFE_AREA_CHANGED, &Window }, { SDL_EVENT_WINDOW_OCCLUDED, &Window },
            { SDL_EVENT_WINDOW_ENTER_FULLSCREEN, &Window }, { SDL_EVENT_WINDOW_LEAVE_FULLSCREEN, &Window },
            { SDL_EVENT_WINDOW_DESTROYED, &Window }, { SDL_EVENT_WINDOW_HDR_STATE_CHANGED, &Window },
            { SDL_EVENT_KEY_DOWN, &Key }, { SDL_EVENT_KEY_UP, &Key }, { SDL_EVENT_TEXT_EDITING, &Text },
            { SDL_EVENT_TEXT_INPUT, &Text }, { SDL_EVENT_TEXT_EDITING_CANDIDATES, &Text },
            { SDL_EVENT_KEYMAP_CHANGED, &KeymapChanged }, { SDL_EVENT_KEYBOARD_ADDED, &Keyboard },
            { SDL_EVENT_KEYBOARD_REMOVED, &Keyboard }, { SDL_EVENT_MOUSE_MOTION, &Mouse },
            { SDL_EVENT_MOUSE_BUTTON_DOWN, &Mouse }, { SDL_EVENT_MOUSE_BUTTON_UP, &Mouse },
            { SDL_EVENT_MOUSE_WHEEL, &Mouse }, { SDL_EVENT_MOUSE_ADDED, &Mouse }, { SDL_EVENT_MOUSE_REMOVED, &Mouse },
            { SDL_EVENT_JOYSTICK_AXIS_MOTION, &Joystick }, { SDL_EVENT_JOYSTICK_BALL_MOTION, &Joystick },
            { SDL_EVENT_JOYSTICK_HAT_MOTION, &Joystick }, { SDL_EVENT_JOYSTICK_BUTTON_DOWN, &Joystick },
            { SDL_EVENT_JOYSTICK_BUTTON_UP, &Joystick }, { SDL_EVENT_JOYSTICK_ADDED, &Joystick },
            { SDL_EVENT_JOYSTICK_REMOVED, &Joystick }, { SDL_EVENT_JOYSTICK_BATTERY_UPDATED, &Joystick },
            { SDL_EVENT_JOYSTICK_UPDATE_COMPLETE, &Joystick }, { SDL_EVENT_GAMEPAD_AXIS_MOTION, &Gamepad },
            { SDL_EVENT_GAMEPAD_BUTTON_DOWN, &Gamepad }, { SDL_EVENT_GAMEPAD_BUTTON_UP, &Gamepad },
            { SDL_EVENT_GAMEPAD_ADDED, &Gamepad }, { SDL_EVENT_GAMEPAD_REMOVED, &Gamepad },
            { SDL_EVENT_GAMEPAD_REMAPPED, &Gamepad }, { SDL_EVENT_GAMEPAD_TOUCHPAD_DOWN, &Gamepad },
            { SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION, &Gamepad }, { SDL_EVENT_GAMEPAD_TOUCHPAD_UP, &Gamepad },
            { SDL_EVENT_GAMEPAD_SENSOR_UPDATE, &Gamepad }, { SDL_EVENT_GAMEPAD_UPDATE_COMPLETE, &Gamepad },
            { SDL_EVENT_GAMEPAD_STEAM_HANDLE_UPDATED, &Gamepad }, { SDL_EVENT_FINGER_DOWN, &Finger },
            { SDL_EVENT_FINGER_UP, &Finger }, { SDL_EVENT_FINGER_MOTION, &Finger },
            { SDL_EVENT_FINGER_CANCELED, &Finger }, { SDL_EVENT_CLIPBOARD_UPDATE, &ClipboardUpdate },
            { SDL_EVENT_DROP_FILE, &Drop }, { SDL_EVENT_DROP_TEXT, &Drop }, { SDL_EVENT_DROP_BEGIN, &Drop },
            { SDL_EVENT_DROP_COMPLETE, &Drop }, { SDL_EVENT_DROP_POSITION, &Drop },
            { SDL_EVENT_AUDIO_DEVICE_ADDED, &AudioDevice }, { SDL_EVENT_AUDIO_DEVICE_REMOVED, &AudioDevice },
            { SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED, &AudioDevice }, { SDL_EVENT_SENSOR_UPDATE, &SensorUpdate },
            { SDL_EVENT_PEN_PROXIMITY_IN, &Pen }, { SDL_EVENT_PEN_PROXIMITY_OUT, &Pen }, { SDL_EVENT_PEN_DOWN, &Pen },
            { SDL_EVENT_PEN_UP, &Pen }, { SDL_EVENT_PEN_BUTTON_DOWN, &Pen }, { SDL_EVENT_PEN_BUTTON_UP, &Pen },
            { SDL_EVENT_PEN_MOTION, &Pen }, { SDL_EVENT_PEN_AXIS, &Pen },
            { SDL_EVENT_CAMERA_DEVICE_ADDED, &CameraDevice }, { SDL_EVENT_CAMERA_DEVICE_REMOVED, &CameraDevice },
            { SDL_EVENT_CAMERA_DEVICE_APPROVED, &CameraDevice }, { SDL_EVENT_CAMERA_DEVICE_DENIED, &CameraDevice },
            { SDL_EVENT_RENDER_TARGETS_RESET, &Render }, { SDL_EVENT_RENDER_DEVICE_RESET, &Render },
            { SDL_EVENT_RENDER_DEVICE_LOST, &Render } }) { };

      // In addition to dispatching things to their normal handler we are also going to send all events that have a
      // WindowID to the CompleteWindowsEvents handler, so that users can listen for all events related to a specific
      // window in one place if they want to.
      virtual void Trigger(SDL_Event* event) const override {
        switch (event->type) {
        // SDL_EVENT_WINDOW_* is already forwarded to Window event handlers
        // But these following events contain a WindowID, and so we want to forward them too there.
        // THat way people can subscribe to things like All mouse events for Window 'x'.
        case SDL_EVENT_FINGER_DOWN:
        case SDL_EVENT_FINGER_UP:
        case SDL_EVENT_FINGER_MOTION:
        case SDL_EVENT_FINGER_CANCELED:
        case SDL_EVENT_PEN_MOTION:
        case SDL_EVENT_PEN_BUTTON_DOWN:
        case SDL_EVENT_PEN_BUTTON_UP:
        case SDL_EVENT_PEN_AXIS:
        case SDL_EVENT_MOUSE_WHEEL:
        case SDL_EVENT_MOUSE_MOTION:
        case SDL_EVENT_MOUSE_BUTTON_DOWN:
        case SDL_EVENT_MOUSE_BUTTON_UP:
        case SDL_EVENT_KEY_DOWN:
        case SDL_EVENT_KEY_UP:
        case SDL_EVENT_PEN_PROXIMITY_IN:
        case SDL_EVENT_PEN_PROXIMITY_OUT:
        case SDL_EVENT_PEN_DOWN:
        case SDL_EVENT_PEN_UP:
        case SDL_EVENT_TEXT_INPUT:
        case SDL_EVENT_TEXT_EDITING:
        case SDL_EVENT_TEXT_EDITING_CANDIDATES:
        case SDL_EVENT_RENDER_TARGETS_RESET:
        case SDL_EVENT_RENDER_DEVICE_RESET:
        case SDL_EVENT_RENDER_DEVICE_LOST:
        case SDL_EVENT_DROP_BEGIN:
        case SDL_EVENT_DROP_FILE:
        case SDL_EVENT_DROP_TEXT:
        case SDL_EVENT_DROP_COMPLETE:
        case SDL_EVENT_DROP_POSITION:
          Window(event);
          // default:
          //  do nothing additional for the others
        }
        EventTypeRouter::Trigger(event);
      }
  };
} // namespace hdk::sdl::evt