events.h

#pragma once
 
#include <cstdint>
 
namespace sdl_painter {

enum class Key : uint16_t {
  kUnknown = 0,
 
  // Harfler (bitişik).
  kA,
  kB,
  kC,
  kD,
  kE,
  kF,
  kG,
  kH,
  kI,
  kJ,
  kK,
  kL,
  kM,
  kN,
  kO,
  kP,
  kQ,
  kR,
  kS,
  kT,
  kU,
  kV,
  kW,
  kX,
  kY,
  kZ,
 
  // Rakamlar (bitişik).
  k0,
  k1,
  k2,
  k3,
  k4,
  k5,
  k6,
  k7,
  k8,
  k9,
 
  // Fonksiyon tuşları (bitişik).
  kF1,
  kF2,
  kF3,
  kF4,
  kF5,
  kF6,
  kF7,
  kF8,
  kF9,
  kF10,
  kF11,
  kF12,
 
  // Yön tuşları.
  kUp,
  kDown,
  kLeft,
  kRight,
 
  // Kontrol / düzenleme tuşları.
  kEscape,
  kEnter,
  kSpace,
  kTab,
  kBackspace,
  kDelete,
  kHome,
  kEnd,
  kPageUp,
  kPageDown,
 
  // Değiştirici (modifier) tuşları.
  kLeftShift,
  kRightShift,
  kLeftCtrl,
  kRightCtrl,
  kLeftAlt,
  kRightAlt,
  kLeftGui,
  kRightGui,
};

enum class KeyModifier : uint8_t {
  kNone = 0,
  kShift = 1U << 0U,
  kCtrl = 1U << 1U,
  kAlt = 1U << 2U,
  kGui = 1U << 3U,
};

constexpr KeyModifier operator|(KeyModifier lhs, KeyModifier rhs) noexcept {
  return static_cast<KeyModifier>(static_cast<uint8_t>(lhs) |
                                  static_cast<uint8_t>(rhs));
}

constexpr KeyModifier operator&(KeyModifier lhs, KeyModifier rhs) noexcept {
  return static_cast<KeyModifier>(static_cast<uint8_t>(lhs) &
                                  static_cast<uint8_t>(rhs));
}

constexpr bool HasModifier(KeyModifier mods, KeyModifier flag) noexcept {
  return (mods & flag) == flag && flag != KeyModifier::kNone;
}

enum class MouseButton : uint8_t {
  kUnknown = 0,
  kLeft,
  kMiddle,
  kRight,
  kX1,
  kX2,
};

struct KeyEvent {
  Key key{Key::kUnknown};
  KeyModifier modifiers{KeyModifier::kNone};
  bool repeat{false};  
};

struct MouseButtonEvent {
  MouseButton button{MouseButton::kUnknown};
  float x{0.0F};
  float y{0.0F};
  uint8_t clicks{1};  
};

struct MouseMoveEvent {
  float x{0.0F};
  float y{0.0F};
  float dx{0.0F};  
  float dy{0.0F};  
};

struct MouseWheelEvent {
  float dx{0.0F};       
  float dy{0.0F};       
  float mouse_x{0.0F};  
  float mouse_y{0.0F};  
};

struct ResizeEvent {
  int32_t width{0};
  int32_t height{0};
};
 
}  // namespace sdl_painter