sdl_backend_system.h

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#pragma once
 
#include <SDL3/SDL.h>
#include <engine/core/system/i_backend_system.h>
 
class SDLBackendSystem : public IBackendSystem {
 public:
  SDLBackendSystem() = default;
 
  void initialize_listeners(
      std::unordered_map<SystemEvent, std::vector<BackendCallback>>* listeners)
      override;
 
  void poll_events() override;
 
  void init_frame_timer() override;
 
  void update_frame_time(float time_scale) override;
 
  [[nodiscard]] float delta_time() const override;
 
  [[nodiscard]] float frames_per_second() const override;
 
  [[nodiscard]] std::string get_clipboard_text() override;
 
  void set_cursor_to_arrow() override;
 
  void set_cursor_to_hand() override;
 
  void set_cursor_to_ibeam() override;
 
  void set_cursor_to_crosshair() override;
 
  void set_cursor_to_wait() override;
 
 private:
  std::unordered_map<SystemEvent, std::vector<BackendCallback>>* listeners_{
      nullptr};
};