2 Copyright (C) 2000 Paul Davis
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.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __pbd_stateful_h__
21 #define __pbd_stateful_h__
39 virtual XMLNode& get_state (void) = 0;
41 virtual int set_state (const XMLNode&, int version) = 0;
45 void add_extra_xml (XMLNode&);
46 XMLNode *extra_xml (const std::string& str);
48 const PBD::ID& id() const { return _id; }
50 static int current_state_version;
51 static int loading_state_version;
55 void add_instant_xml (XMLNode&, const sys::path& directory_path);
56 XMLNode *instant_xml (const std::string& str, const sys::path& directory_path);
59 XMLNode *_instant_xml;
65 #endif /* __pbd_stateful_h__ */