button_presser.hpp

#pragma once
#include <cstdint>
#include <utility>
 
namespace bugui
{
struct base_controller;

struct button_presser
{
  void set_midi(uint8_t midi);
  void set_bool(bool boolean);
  void set_double_press();
 
  enum states : uint8_t
  {
    single 
    , doubled 
    , dragged 
    , dropped 
  };

  states get_state() const { return state; }
  bool get_bool();
  bool get_midi();

  void clear_values() { available = available_values::none; }
 
protected:
  states state{single};
 
  enum class available_values : std::uint8_t
  {
    none = 0
    , boolean = 1
    , midi =  2
  };
 
  available_values available{available_values::none};
 
private:
  friend bool operator& (available_values left
                        , available_values right)
  {
    return std::to_underlying(left)
    & std::to_underlying(right);
  };
 
  friend available_values operator| (available_values left
                                    , available_values right)
  {
    return static_cast<available_values>
        (std::to_underlying(left)
         | std::to_underlying(right));
  };
 
  uint8_t midi_value{};
  bool bool_value{false};
};
 
} // namespace bugui