Claw  1.7.3
tween/base_tweener.hpp
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00001 /*
00002   CLAW - a C++ Library Absolutely Wonderful
00003 
00004   CLAW is a free library without any particular aim but being useful to 
00005   anyone.
00006 
00007   Copyright (C) 2005-2011 Julien Jorge
00008 
00009   This library is free software; you can redistribute it and/or
00010   modify it under the terms of the GNU Lesser General Public
00011   License as published by the Free Software Foundation; either
00012   version 2.1 of the License, or (at your option) any later version.
00013 
00014   This library is distributed in the hope that it will be useful,
00015   but WITHOUT ANY WARRANTY; without even the implied warranty of
00016   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017   Lesser General Public License for more details.
00018 
00019   You should have received a copy of the GNU Lesser General Public
00020   License along with this library; if not, write to the Free Software
00021   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00022   contact: julien.jorge@gamned.org
00023 */
00029 #ifndef __CLAW_TWEEN_BASE_TWEENER_HPP__
00030 #define __CLAW_TWEEN_BASE_TWEENER_HPP__
00031 
00032 #include <list>
00033 #include <boost/function.hpp>
00034 
00035 namespace claw
00036 {
00037   namespace tween
00038   {
00044     class base_tweener
00045     {
00046     public:
00051       typedef boost::function<void ()> finish_callback;
00052 
00053     public:
00054       virtual ~base_tweener();
00055 
00056       base_tweener* clone() const;
00057 
00058       bool is_finished() const;
00059       double update( double dt );
00060 
00061       void on_finished( finish_callback f );
00062       
00063     private:
00064       void notify_finished() const;
00065 
00069       virtual base_tweener* do_clone() const = 0;
00070 
00074       virtual bool do_is_finished() const = 0;
00075 
00081       virtual double do_update( double dt ) = 0;
00082 
00083     private:
00085       std::list<finish_callback> m_on_finished;
00086 
00087     }; // class base_tweener
00088 
00089   } // namespace tween
00090 } // namespace claw
00091 
00092 #endif // __CLAW_TWEEN_BASE_TWEENER_HPP__