mtevent.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include "irrlichttypes.h"
 
class MtEvent
{
public:
        enum Type : u8
        {
                VIEW_BOBBING_STEP = 0,
                CAMERA_PUNCH_LEFT,
                CAMERA_PUNCH_RIGHT,
                PLAYER_FALLING_DAMAGE,
                PLAYER_DAMAGE,
                NODE_DUG,
                PLAYER_JUMP,
                PLAYER_REGAIN_GROUND,
                TYPE_MAX,
        };
 
        virtual ~MtEvent() = default;
        virtual Type getType() const = 0;
};
 
// An event with no parameters and customizable name
class SimpleTriggerEvent : public MtEvent
{
        Type type;
 
public:
        SimpleTriggerEvent(Type type) : type(type) {}
        Type getType() const override { return type; }
};
 
class MtEventReceiver
{
public:
        virtual ~MtEventReceiver() = default;
        virtual void onEvent(MtEvent *e) = 0;
};
 
typedef void (*event_receive_func)(MtEvent *e, void *data);
 
class MtEventManager
{
public:
        virtual ~MtEventManager() = default;
        virtual void put(MtEvent *e) = 0;
        virtual void reg(MtEvent::Type type, event_receive_func f, void *data) = 0;
        // If data==NULL, every occurrence of f is deregistered.
        virtual void dereg(MtEvent::Type type, event_receive_func f, void *data) = 0;
};