ceph/src/boost/libs/msm/doc/PDF/examples/iPod_distributed/MenuMode.hpp

   1 // Copyright 2010 Christophe Henry
   2 // henry UNDERSCORE christophe AT hotmail DOT com
   3 // This is an extended version of the state machine available in the boost::mpl library
   4 // Distributed under the same license as the original.
   5 // Copyright for the original version:
   6 // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
   7 // under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 #ifndef MENU_MODE_HPP
  12 #define MENU_MODE_HPP
  13
  14 #include <iostream>
  15 #include <boost/any.hpp>
  16
  17 #include "Events.hpp"
  18 #include <boost/msm/back/favor_compile_time.hpp>
  19 #include <boost/msm/back/state_machine.hpp>
  20 #include <boost/msm/front/state_machine_def.hpp>
  21
  22 using namespace std;
  23 namespace msm = boost::msm;
  24
  25 struct MenuMode_ : public msm::front::state_machine_def<MenuMode_>
  26 {
  27     typedef mpl::vector1<MenuActive>        flag_list;
  28     struct WaitingForSongChoice : public msm::front::state<>
  29     {
  30         template <class Event,class FSM>
  31         void on_entry(Event const&,FSM& ) {std::cout << "starting: MenuMode::WaitingForSongChoice" << std::endl;}
  32         template <class Event,class FSM>
  33         void on_exit(Event const&,FSM& ) {std::cout << "finishing: MenuMode::WaitingForSongChoice" << std::endl;}
  34     };
  35     struct StartCurrentSong : public msm::front::state<>
  36     {
  37         template <class Event,class FSM>
  38         void on_entry(Event const&,FSM& ) {std::cout << "starting: MenuMode::StartCurrentSong" << std::endl;}
  39         template <class Event,class FSM>
  40         void on_exit(Event const&,FSM& ) {std::cout << "finishing: MenuMode::StartCurrentSong" << std::endl;}
  41     };
  42     struct MenuExit : public msm::front::exit_pseudo_state<CloseMenu>
  43     {
  44         template <class Event,class FSM>
  45         void on_entry(Event const&,FSM& ) {std::cout << "starting: MenuMode::WaitingForSongChoice" << std::endl;}
  46         template <class Event,class FSM>
  47         void on_exit(Event const&,FSM& ) {std::cout << "finishing: MenuMode::WaitingForSongChoice" << std::endl;}
  48     };
  49     typedef WaitingForSongChoice initial_state;
  50     typedef MenuMode_ fsm; // makes transition table cleaner
  51     // Transition table for player
  52     struct transition_table : mpl::vector2<
  53         //     Start                 Event           Next                Action                   Guard
  54         //    +---------------------+------------------+-------------------+---------------------+----------------------+
  55         _row < WaitingForSongChoice , MenuMiddleButton , StartCurrentSong                                               >,
  56         _row < StartCurrentSong     , SelectSong       , MenuExit                                                       >
  57         //    +---------------------+------------------+-------------------+---------------------+----------------------+
  58     > {};
  59 };
  60 typedef msm::back::state_machine<MenuMode_> MenuMode;
  61
  62 #endif