GameManager.h

///
/// The game manager
///
 
#ifndef __GAME_MANAGER_H__
#define __GAME_MANAGER_H__
 
#include "Manager.h"
 
#define DF_VERSION 4.20 /// Dragonfly version
 
// Two-letter acronym for easier access to manager.
#define GM df::GameManager::getInstance()
 
namespace df {
 
/// Default Dragonfly cofiguration file.
/// Override with DRAGONFLY_CONFIG environment variable.
const std::string CONFIG_FILENAME = "df-config.txt";
 
/// Default frame time (game loop time) in milliseconds (33 ms == 30 f/s).
const int FRAME_TIME_DEFAULT = 33;
 
class GameManager : public Manager {
 
 private:
  GameManager();                      ///< Private since a singleton.
  GameManager(GameManager const&);    ///< Don't allow copy.
  void operator=(GameManager const&); ///< Don't allow assignment.
  bool m_game_over;           ///< True -> game loop should stop.
  int m_frame_time;           ///< Target time per game loop, in millisec.
  int m_step_count;           ///< Count of game loop iterations.
  
 public:
  /// Get the singleton instance of the GameManager.
  static GameManager &getInstance();
 
  /// Startup all GameManager services.
  int startUp() override;
 
  /// Game manager only accepts step events.
  /// Return false if other event.
  bool isValid(std::string event_name) const override;
 
  /// Shut down GameManager services.
  void shutDown() override;
 
  /// Run game loop.
  void run();
 
  /// Set game over status to indicated value.
  /// If true (default), will stop game loop.
  void setGameOver(bool game_over=true);
 
  /// Get game over status.
  bool getGameOver() const;
 
  /// Return frame time.  
  /// Frame time is target time for each game loop, in milliseconds.
  int getFrameTime() const;
  
  /// Return game loop step count.
  int getStepCount() const;
};
 
} // end of namespace df
#endif // __GAME_MANAGER_H__