mtevent.h

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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
#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 occurence of f is deregistered.
    virtual void dereg(MtEvent::Type type, event_receive_func f, void *data) = 0;
};