Program Listing for File EventSubscriber.hpp

↰ Return to documentation for file (include/ari/en/EventSubscriber.hpp)

#pragma once
#include "../aridef.hpp"
#include <memory>

namespace ari
{
    class World;
    class Entity;
    class Component;
    class FrameData;

    namespace Internal
    {
        class ARI_API BaseEventSubscriber
        {
        public:

            virtual ~BaseEventSubscriber() = default;
        };

    } // Internal

    template<typename T>
    class ARI_API EventSubscriber: public Internal::BaseEventSubscriber
    {
    public:

        virtual ~EventSubscriber() = default;

        virtual void Receive(World* world, const T& event) = 0;

    }; // EventSubscriber


    namespace events
    {
        // Called when a new entity is created.
        struct OnEntityCreated
        {
            ARI_DECLARE_TYPE;

            Entity* entity;
        };

        // Called when an entity is about to be destroyed.
        struct OnEntityDestroyed
        {
            ARI_DECLARE_TYPE;

            Entity* entity;
        };

        // Called when a component is assigned (not necessarily created).
        template <class T>
        struct OnComponentAssigned
        {
            ARI_DECLARE_TYPE;

            Entity* entity;
            T* component;
        };

        // Called when a component is removed
        template <class T>
        struct OnComponentRemoved
        {
            ARI_DECLARE_TYPE;

            Entity* entity;
            T* component;
        };

        struct OnFrameData
        {
            ARI_DECLARE_TYPE;

            FrameData* frame_data;

        };

    } // events

} // ari