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copied!<p>You look at things as: </p> <p>I have a static container for states (your App), and a lot of states (you AppState) which can contain data and only one handler.</p> <p>Instead look at it as: </p> <p>I have a one StateMachine class. (I may or may not have many instances of it.) This holds the data needed to interact with the outside world. Is also contains a static set of eventHandlers, one for each state. These eventHandler classes contain no data.</p> <pre><code>class StateMachine { public: void handleInput() { //there is now only one dispatcher if( world.doingInput1() ) _current_state->handleInput1( *this ); else if( world.doingInput2() ) _current_state->handleInput2( *this, world.get_Input2Argument() ); //... } //the states, just a set of event handlers static const State& state1; static const State& state2; //... StateMachine( OutsideWorld& world ) :world( world ) { setCurrentState( StateMachine::state1 ); } void setCurrentState( const State& state ) { _current_state = &state; } OutsidWorld& world; private: State* _current_state; }; class State { public: //virtual ~State(); //no resources so no cleanup virtual void handleInput1( StateMachine& sm ) const {}; virtual void handleInput2( StateMachine& sm, int myParam ) const {}; //... }; class State1 { public: //define the ones that actually do stuff virtual void handleInput1( StateMachine& sm ) const { sm.world.DoSomething(); sm.setCurrentState( StateMachine::state27 ); } virtual void handleInput27( StateMachine& sm, int myParam ) const { sm.world.DoSomethingElse( myParam ); }; }; const State& StateMachine::state1 = *new State1(); //... more states </code></pre>

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