Line data    Source code

       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             : #ifndef EVENT_HEADER
      21             : #define EVENT_HEADER
      22             : 
      23          38 : class MtEvent
      24             : {
      25             : public:
      26          38 :         virtual ~MtEvent(){};
      27             :         //virtual MtEvent* clone(){ return new IEvent; }
      28             :         virtual const char* getType() const = 0;
      29             : 
      30             :         MtEvent* checkIs(const std::string &type)
      31             :         {
      32             :                 if(type == getType())
      33             :                         return this;
      34             :                 return NULL;
      35             :         }
      36             : };
      37             : 
      38             : // An event with no parameters and customizable name
      39          76 : class SimpleTriggerEvent: public MtEvent
      40             : {
      41             :         const char *type;
      42             : public:
      43          38 :         SimpleTriggerEvent(const char *type):
      44          38 :                 type(type)
      45          38 :         {}
      46          38 :         const char* getType() const
      47          38 :         {return type;}
      48             : };
      49             : 
      50             : class MtEventReceiver
      51             : {
      52             : public:
      53             :         virtual ~MtEventReceiver(){};
      54             :         virtual void onEvent(MtEvent *e) = 0;
      55             : };
      56             : 
      57             : typedef void (*event_receive_func)(MtEvent *e, void *data);
      58             : 
      59           1 : class MtEventManager
      60             : {
      61             : public:
      62           1 :         virtual ~MtEventManager(){};
      63             :         virtual void put(MtEvent *e) = 0;
      64             :         virtual void reg(const char *type, event_receive_func f, void *data) = 0;
      65             :         // If data==NULL, every occurence of f is deregistered.
      66             :         virtual void dereg(const char *type, event_receive_func f, void *data) = 0;
      67             :         virtual void reg(MtEventReceiver *r, const char *type) = 0;
      68             :         virtual void dereg(MtEventReceiver *r, const char *type) = 0;
      69             : };
      70             : 
      71             : #endif
      72             :