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/*
ParaGUI - crossplatform widgetset
Copyright (C) 2000-2004 Alexander Pipelka
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Alexander Pipelka
pipelka@teleweb.at
Last Update: $Author: mbickel $
Update Date: $Date: 2009-04-18 13:48:39 $
Source File: $Source: /home/cvspsrv/cvsroot/games/asc/source/libs/paragui/include/pgfactory.h,v $
CVS/RCS Revision: $Revision: 1.3 $
Status: $State: Exp $
*/
#ifndef PG_FACTORY_H
#define PG_FACTORY_H
#include <map>
#include <string>
#include "pgsingleton.h"
/** \file pgfactory.h
Header file for the PG_FactoryHolder class template.
This include file defines the template class PG_FactoryHolder and defines PG_Factory.
*/
class PG_Widget;
template< class T, class PT = PG_Widget >
class PG_FactoryObject {
public:
static T* CreateObject(PT* parent) {
return new T(parent);
}
static T* CreateObject0() {
return new T;
}
};
template<class H>
class PG_FactoryHolder : public PG_Singleton< PG_FactoryHolder<H> > {
public:
typedef PG_Widget* (*CREATEFN)(PG_Widget* parent);
template< class T, class PT >
static void RegisterClass(const H& classname) {
PG_Singleton< PG_FactoryHolder<H> >::GetInstance().RegisterCreateFn(classname, (CREATEFN)&PG_FactoryObject<T, PT>::CreateObject);
}
template< class T >
static void RegisterClass(const H& classname) {
PG_Singleton< PG_FactoryHolder<H> >::GetInstance().RegisterCreateFn(classname, (CREATEFN)&PG_FactoryObject<T>::CreateObject);
}
template< class T >
static void RegisterClass0(const H& classname) {
PG_Singleton< PG_FactoryHolder<H> >::GetInstance().RegisterCreateFn(classname, (CREATEFN)&PG_FactoryObject<T>::CreateObject0);
}
static PG_Widget* CreateObject(const H& classname, PG_Widget* parent = NULL) {
CREATEFN create = PG_Singleton< PG_FactoryHolder<H> >::GetInstance().creator_map[classname];
if(create == NULL) {
return NULL;
}
return create(parent);
}
static PG_Widget* CreateObject0(const H& classname, PG_Widget* parent = NULL) {
CREATEFN create = PG_Singleton< PG_FactoryHolder<H> >::GetInstance().creator_map[classname];
if(create == NULL) {
return NULL;
}
return create(parent);
}
protected:
inline void RegisterCreateFn(const H& classname, CREATEFN fn) {
creator_map[classname] = fn;
}
std::map< H, CREATEFN > creator_map;
friend class PG_Singleton< PG_FactoryHolder<H> >;
};
typedef PG_FactoryHolder<std::string> PG_Factory;
#endif // PG_FACTORY_H
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