reaction 0.2.0

Universal low-latency input handling for game engines
Documentation 
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#[cfg(feature = "config-files")]
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "config-files", derive(Serialize, Deserialize))]
pub enum KeyCode {
    // A-Z
    KeyA,
    KeyB,
    KeyC,
    KeyD,
    KeyE,
    KeyF,
    KeyG,
    KeyH,
    KeyI,
    KeyJ,
    KeyK,
    KeyL,
    KeyM,
    KeyN,
    KeyO,
    KeyP,
    KeyQ,
    KeyR,
    KeyS,
    KeyT,
    KeyU,
    KeyV,
    KeyW,
    KeyX,
    KeyY,
    KeyZ,
    // Numbers
    Digit0,
    Digit1,
    Digit2,
    Digit3,
    Digit4,
    Digit5,
    Digit6,
    Digit7,
    Digit8,
    Digit9,
    // Modifiers
    ShiftLeft,
    ShiftRight,
    ControlLeft,
    ControlRight,
    AltLeft,
    AltRight,
    MetaLeft,
    MetaRight,
    // Function keys
    F1,
    F2,
    F3,
    F4,
    F5,
    F6,
    F7,
    F8,
    F9,
    F10,
    F11,
    F12,
    // Navigation
    ArrowUp,
    ArrowDown,
    ArrowLeft,
    ArrowRight,
    Home,
    End,
    PageUp,
    PageDown,
    // Special
    Space,
    Enter,
    Escape,
    Tab,
    Backspace,
    Delete,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "config-files", derive(Serialize, Deserialize))]
pub enum MouseButton {
    Left,
    Right,
    Middle,
    Back,
    Forward,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "config-files", derive(Serialize, Deserialize))]
pub enum GamepadButton {
    A,
    B,
    X,
    Y,
    LeftShoulder,
    RightShoulder,
    LeftStick,
    RightStick,
    Start,
    Back,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "config-files", derive(Serialize, Deserialize))]
pub enum GamepadAxis {
    LeftStickX,
    LeftStickY,
    RightStickX,
    RightStickY,
    LeftTrigger,
    RightTrigger,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "config-files", derive(Serialize, Deserialize))]
pub enum GamepadId {
    One = 0,
    Two = 1,
    Three = 2,
    Four = 3,
}

#[derive(Debug, Clone, Copy, Default, PartialEq)]
pub struct ModifierState {
    pub shift: bool,
    pub ctrl: bool,
    pub alt: bool,
    pub meta: bool,
}