presage
0.8.7
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00001 00002 /****************************************************** 00003 * Presage, an extensible predictive text entry system 00004 * --------------------------------------------------- 00005 * 00006 * Copyright (C) 2008 Matteo Vescovi <matteo.vescovi@yahoo.co.uk> 00007 00008 This program is free software; you can redistribute it and/or modify 00009 it under the terms of the GNU General Public License as published by 00010 the Free Software Foundation; either version 2 of the License, or 00011 (at your option) any later version. 00012 00013 This program is distributed in the hope that it will be useful, 00014 but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 GNU General Public License for more details. 00017 00018 You should have received a copy of the GNU General Public License along 00019 with this program; if not, write to the Free Software Foundation, Inc., 00020 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 00021 * 00022 **********(*)*/ 00023 00024 00025 #ifndef PRESAGE_OBSERVABLE 00026 #define PRESAGE_OBSERVABLE 00027 00028 #if HAVE_CONFIG_H 00029 # include "config.h" 00030 #endif 00031 00032 #include "observer.h" 00033 00034 #include <list> 00035 #include <string> 00036 00037 class Observable { 00038 public: 00039 virtual ~Observable (); 00040 00041 virtual void attach (Observer* observer); 00042 virtual void detach (Observer* observer); 00043 virtual void notify (); 00044 00045 virtual std::string get_name () const = 0; 00046 virtual std::string get_value () const = 0; 00047 00048 protected: 00049 Observable (); 00050 00051 private: 00052 std::list <Observer*> observers; 00053 00054 }; 00055 00056 #endif // PRESAGE_OBSERVABLE