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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
* You should have received a copy of the GNU 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.
*
*/
#ifndef NEVERHOOD_ENTITY_H
#define NEVERHOOD_ENTITY_H
#include "neverhood/neverhood.h"
#include "neverhood/graphics.h"
namespace Neverhood {
class Entity;
struct MessageParam {
union {
uint32 _integer;
NPoint _point;
Entity *_entity;
// TODO: Other types...
};
MessageParam(uint32 value) { _integer = value; }
MessageParam(NPoint value) { _point = value; }
MessageParam(Entity *entity) { _entity = entity; }
// TODO: Constructors for the param types...
};
#define SetUpdateHandler(handler) _updateHandlerCb = static_cast <void (Entity::*)(void)> (handler)
#define SetMessageHandler(handler) _messageHandlerCb = static_cast <uint32 (Entity::*)(int messageNum, const MessageParam ¶m, Entity *sender)> (handler)
class Entity {
public:
Common::String _name; // Entity name for debugging purposes
Entity(NeverhoodEngine *vm, int priority)
: _vm(vm), _updateHandlerCb(NULL), _messageHandlerCb(NULL), _priority(priority), _name("Entity") {
}
virtual ~Entity() {
}
virtual void draw() {
}
void handleUpdate() {
//debug("Entity(%s).handleUpdate", _name.c_str());
if (_updateHandlerCb)
(this->*_updateHandlerCb)();
}
bool hasMessageHandler() const { return _messageHandlerCb != NULL; }
uint32 sendMessage(int messageNum, const MessageParam ¶m, Entity *sender) {
return _messageHandlerCb ? (this->*_messageHandlerCb)(messageNum, param, sender) : 0;
}
// NOTE: These were overloaded before for the various message parameter types
// it caused some problems so each type gets its own sendMessage variant now
uint32 sendMessage(int messageNum, uint32 param, Entity *sender) {
return sendMessage(messageNum, MessageParam(param), sender);
}
uint32 sendPointMessage(int messageNum, NPoint param, Entity *sender) {
return sendMessage(messageNum, MessageParam(param), sender);
}
uint32 sendEntityMessage(int messageNum, Entity *param, Entity *sender) {
return sendMessage(messageNum, MessageParam((Entity*)param), sender);
}
int getPriority() const { return _priority; }
protected:
void (Entity::*_updateHandlerCb)();
uint32 (Entity::*_messageHandlerCb)(int messageNum, const MessageParam ¶m, Entity *sender);
NeverhoodEngine *_vm;
int _priority;
};
} // End of namespace Neverhood
#endif /* NEVERHOOD_ENTITY_H */
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