1/*
2 Copyright 2010 Stefan Majewsky <majewsky@gmx.net>
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17*/
18
19#ifndef KOLF_ITEMFACTORY_H
20#define KOLF_ITEMFACTORY_H
21
22#include <QGraphicsItem>
23class b2World;
24
25namespace Kolf
26{
27 struct ItemMetadata
28 {
29 QString identifier, name;
30 bool addOnNewHole;
31 };
32
33 //This class registers maps identifiers and other metadata to QGraphicsItem subclasses, and is able to create item instances as needed.
34 class ItemFactory
35 {
36 public:
37 QList<Kolf::ItemMetadata> knownTypes() const;
38 QGraphicsItem* createInstance(const QString& identifier, QGraphicsItem* parent, b2World* world) const;
39
40 template<typename T> void registerType(const QString& identifier, const QString& name, bool addOnNewHole = false)
41 {
42 const Kolf::ItemMetadata metadata = { identifier, name, addOnNewHole };
43 registerType(metadata, &Kolf::ItemFactory::create<T>);
44 }
45 private:
46 typedef QGraphicsItem* (*ItemCreator)(QGraphicsItem* parent, b2World* world);
47 void registerType(const Kolf::ItemMetadata& metadata, ItemCreator creator);
48 template<typename T> static QGraphicsItem* create(QGraphicsItem* parent, b2World* world)
49 {
50 return new T(parent, world);
51 }
52 private:
53 typedef QPair<Kolf::ItemMetadata, ItemCreator> Entry;
54 QList<Entry> m_entries;
55 };
56}
57
58#endif // KOLF_ITEMFACTORY_H
59