1 // Copyright (C) 2007, 2008, 2009 Ben Asselstine
3 // This program is free software; you can redistribute it and/or modify
4 // it under the terms of the GNU General Public License as published by
5 // the Free Software Foundation; either version 3 of the License, or
6 // (at your option) any later version.
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU Library General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program; if not, write to the Free Software
15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include <sigc++/trackable.h>
22 #include "LocationList.h"
27 //! A list of the Port objects on the game map.
29 * The portlist keeps track of the ports located on the game map. It
30 * is implemented as a singleton because many classes use it for looking up
33 class Portlist : public LocationList<Port*>, public sigc::trackable
36 //! The xml tag of this object in a saved-game file.
37 static std::string d_tag;
39 // Methods that operate on the class data but do not modify the class.
41 //! Saves the list of Port objects to the opened saved-game file.
42 bool save(XML_Helper* helper) const;
47 //! Return the singleton instance. Create a new one if needed.
48 static Portlist* getInstance();
50 //! Load the singleton instance from the opened saved-game file.
51 static Portlist* getInstance(XML_Helper* helper);
53 //! Explicitly delete the singleton instance.
54 static void deleteInstance();
58 //! Default constructor.
61 //! Loading constructor.
63 * Load the list of Port objects from the opened saved-game file.
65 * @param helper The opened saved-game file to load Port objects from.
67 Portlist(XML_Helper* helper);
70 //! Callback for loading Port objects into the list of ports.
71 bool load(std::string tag, XML_Helper* helper);
75 //! A static pointer for the singleton instance.
76 static Portlist* s_instance;