GlobalEvent.h

#pragma once
 
 
#include <Foundation/Containers/Map.h>
#include <Foundation/Strings/String.h>
#include <Foundation/Types/Variant.h>
#include <Foundation/Utilities/EnumerableClass.h>
 
class PL_FOUNDATION_DLL plGlobalEvent : public plEnumerable<plGlobalEvent>
{
  PL_DECLARE_ENUMERABLE_CLASS(plGlobalEvent);
 
public:
  struct PL_FOUNDATION_DLL EventData
  {
    EventData();
 
    plUInt32 m_uiNumTimesFired;
    plUInt16 m_uiNumEventHandlersRegular;
    plUInt16 m_uiNumEventHandlersOnce;
  };
 
  using EventMap = plMap<plString, EventData>;
 
public:
  using PL_GLOBAL_EVENT_HANDLER = void (*)(const plVariant&, const plVariant&, const plVariant&, const plVariant&);
 
  plGlobalEvent(plStringView sEventName, PL_GLOBAL_EVENT_HANDLER eventHandler, bool bOnlyOnce); // [tested]
 
  static void Broadcast(plStringView sEventName, plVariant param0 = plVariant(), plVariant param1 = plVariant(), plVariant param2 = plVariant(),
    plVariant param3 = plVariant()); // [tested]
 
  static void PrintGlobalEventStatistics(); // [tested]
 
  static void UpdateGlobalEventStatistics();
 
  static const EventMap& GetEventStatistics() { return s_KnownEvents; }
 
private:
  bool m_bOnlyOnce;
  bool m_bHasBeenFired;
  plStringView m_sEventName;
  PL_GLOBAL_EVENT_HANDLER m_EventHandler;
 
  static EventMap s_KnownEvents;
};
 
#define PL_BROADCAST_EVENT(name, ...) plGlobalEvent::Broadcast(#name, ##__VA_ARGS__);
 
#define PL_ON_GLOBAL_EVENT(name)                                                                                                       \
  static void EventHandler_##name(const plVariant& param0, const plVariant& param1, const plVariant& param2, const plVariant& param3); \
  static plGlobalEvent s_EventHandler_##name(#name, EventHandler_##name, false);                                                       \
  static void EventHandler_##name(const plVariant& param0, const plVariant& param1, const plVariant& param2, const plVariant& param3)
 
#define PL_ON_GLOBAL_EVENT_ONCE(name)                                                                                                  \
  static void EventHandler_##name(const plVariant& param0, const plVariant& param1, const plVariant& param2, const plVariant& param3); \
  static plGlobalEvent s_EventHandler_##name(#name, EventHandler_##name, true);                                                        \
  static void EventHandler_##name(const plVariant& param0, const plVariant& param1, const plVariant& param2, const plVariant& param3)