StateMachine.h

///
/// A finite state machine.
///
 
#ifndef __STATEMACHINE_H__
#define __STATEMACHINE_H__
 
#include "Object.h"
#include "State.h"
 
namespace df {
  
class StateMachine {
 
 private:
  Object *m_p_owner;         /// Owner of this state machine.
  State *m_p_state;          /// Current state.
  State *m_p_previous_state; /// Previous state.
  State *m_p_global_state;   /// Global state (reachable from any state).
 
 public:
  StateMachine();
 
  /// Set owner of state machine.
  void setOwner(Object *p_new_owner);
 
  /// Get owner of state machine.
  Object *getOwner() const;
 
  /// Set current state.
  void setState(State *p_new_state);
 
  /// Get current state.
  State *getState() const;
 
  /// Set previous state.
  void setPreviousState(State *p_new_state);
 
  /// Get previous state.
  State *getPreviousState() const;
 
  /// Set global state.
  void setGlobalState(State *p_new_state);
 
  /// Get global state.
  State *getGlobalState() const;
 
  /// Update state machine (calling Execute() for current state).
  void Update();
 
  /// Change current state.
  void changeState(State *p_new_state);
 
  /// Revert to previous state.
  void revertToPrevious();
};
 
}
#endif