src/input.h


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#ifndef INPUT_H_0FB34C42
#define INPUT_H_0FB34C42

#include <SDL.h>
#include <vector>

/**
 * Helper class that detects when a key is newly pressed.
 */
class Input {
public:

  Input()
  {
    const Uint8* s = SDL_GetKeyboardState(&length_);

    curstate_.assign(s, s + length_);
    prevstate_ = curstate_;
  }

  void tick(const Uint8* keystate)
  {
    prevstate_ = std::move(curstate_);
    curstate_.assign(keystate, keystate + length_);
  }

  bool wasPressed(int scancode) const
  {
    return curstate_.at(scancode) && !prevstate_.at(scancode);
  }

private:

  int length_;
  std::vector<Uint8> curstate_;
  std::vector<Uint8> prevstate_;
};

#endif /* end of include guard: INPUT_H_0FB34C42 */