src/mtevent.h

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #pragma once
  21
  22 #include "irrlichttypes.h"
  23
  24 class MtEvent
  25 {
  26 public:
  27         enum Type : u8
  28         {
  29                 VIEW_BOBBING_STEP = 0,
  30                 CAMERA_PUNCH_LEFT,
  31                 CAMERA_PUNCH_RIGHT,
  32                 PLAYER_FALLING_DAMAGE,
  33                 PLAYER_DAMAGE,
  34                 NODE_DUG,
  35                 PLAYER_JUMP,
  36                 PLAYER_REGAIN_GROUND,
  37                 TYPE_MAX,
  38         };
  39
  40         virtual ~MtEvent() = default;
  41         virtual Type getType() const = 0;
  42 };
  43
  44 // An event with no parameters and customizable name
  45 class SimpleTriggerEvent : public MtEvent
  46 {
  47         Type type;
  48
  49 public:
  50         SimpleTriggerEvent(Type type) : type(type) {}
  51         Type getType() const override { return type; }
  52 };
  53
  54 class MtEventReceiver
  55 {
  56 public:
  57         virtual ~MtEventReceiver() = default;
  58         virtual void onEvent(MtEvent *e) = 0;
  59 };
  60
  61 typedef void (*event_receive_func)(MtEvent *e, void *data);
  62
  63 class MtEventManager
  64 {
  65 public:
  66         virtual ~MtEventManager() = default;
  67         virtual void put(MtEvent *e) = 0;
  68         virtual void reg(MtEvent::Type type, event_receive_func f, void *data) = 0;
  69         // If data==NULL, every occurence of f is deregistered.
  70         virtual void dereg(MtEvent::Type type, event_receive_func f, void *data) = 0;
  71 };