1 /* -*- Mode: C++; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil -*- 2 * 3 * Quadra, an action puzzle game 4 * Copyright (C) 1998-2000 Ludus Design 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #ifndef _HEADER_NOTIFY 22 #define _HEADER_NOTIFY 23 24 #include <list> 25 26 class Notifyable { 27 public: 28 virtual void notify()=0; ~Notifyable()29 virtual ~Notifyable() { 30 } 31 }; 32 33 class Observable { 34 std::list<Notifyable*> notes; 35 public: 36 virtual ~Observable(); 37 virtual void add_watch(Notifyable *n); 38 virtual void remove_watch(Notifyable *n); 39 virtual void notify_all(); 40 }; 41 42 #endif 43