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/*
Copyright 2010 Stefan Majewsky <majewsky@gmx.net>
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 KOLF_ITEMFACTORY_H
#define KOLF_ITEMFACTORY_H
#include <QGraphicsItem>
class b2World;
namespace Kolf
{
struct ItemMetadata
{
QString identifier, name;
bool addOnNewHole;
};
//This class registers maps identifiers and other metadata to QGraphicsItem subclasses, and is able to create item instances as needed.
class ItemFactory
{
public:
QList<Kolf::ItemMetadata> knownTypes() const;
QGraphicsItem* createInstance(const QString& identifier, QGraphicsItem* parent, b2World* world) const;
template<typename T> void registerType(const QString& identifier, const QString& name, bool addOnNewHole = false)
{
const Kolf::ItemMetadata metadata = { identifier, name, addOnNewHole };
registerType(metadata, &Kolf::ItemFactory::create<T>);
}
private:
typedef QGraphicsItem* (*ItemCreator)(QGraphicsItem* parent, b2World* world);
void registerType(const Kolf::ItemMetadata& metadata, ItemCreator creator);
template<typename T> static QGraphicsItem* create(QGraphicsItem* parent, b2World* world)
{
return new T(parent, world);
}
private:
typedef QPair<Kolf::ItemMetadata, ItemCreator> Entry;
QList<Entry> m_entries;
};
}
#endif // KOLF_ITEMFACTORY_H
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