#[derive(Clone, Debug, Copy)]
pub enum Event {
    /// The size of the window has changed.
    Resized(u32, u32),

    /// The position of the window has changed.
    Moved(i32, i32),

    /// The window has been closed.
    Closed,

    /// The window received a unicode character.
    ReceivedCharacter(char),

    /// The window gained or lost focus.
    ///
    /// The parameter is true if the window has gained focus, and false if it has lost focus.
    Focused(bool),

    /// An event from the keyboard has been received.
    KeyboardInput(ElementState, ScanCode, Option<VirtualKeyCode>),

    /// The cursor has moved on the window.
    ///
    /// The parameter are the (x,y) coords in pixels relative to the top-left corner of the window.
    MouseMoved((i32, i32)),

    /// A mouse wheel movement or touchpad scroll occurred.
    MouseWheel(MouseScrollDelta),

    /// An event from the mouse has been received.
    MouseInput(ElementState, MouseButton),

    /// The event loop was woken up by another thread.
    Awakened,

    /// The window needs to be redrawn.
    Refresh,
}

pub type ScanCode = u8;

#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
pub enum ElementState {
    Pressed,
    Released,
}

#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
pub enum MouseButton {
    Left,
    Right,
    Middle,
    Other(u8),
}

#[derive(Debug, Clone, Copy)]
pub enum MouseScrollDelta {
	/// Amount in lines or rows to scroll in the horizontal
	/// and vertical directions.
	///
	/// Positive values indicate movement forward
	/// (away from the user) or rightwards.
	LineDelta(f32, f32),
	/// Amount in pixels to scroll in the horizontal and
	/// vertical direction.
	///
	/// Scroll events are expressed as a PixelDelta if
	/// supported by the device (eg. a touchpad) and
	/// platform.
	PixelDelta(f32, f32)
}

#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
pub enum VirtualKeyCode {
    /// The '1' key over the letters.
    Key1,
    /// The '2' key over the letters.
    Key2,
    /// The '3' key over the letters.
    Key3,
    /// The '4' key over the letters.
    Key4,
    /// The '5' key over the letters.
    Key5,
    /// The '6' key over the letters.
    Key6,
    /// The '7' key over the letters.
    Key7,
    /// The '8' key over the letters.
    Key8,
    /// The '9' key over the letters.
    Key9,
    /// The '0' key over the 'O' and 'P' keys.
    Key0,

    A,
    B,
    C,
    D,
    E,
    F,
    G,
    H,
    I,
    J,
    K,
    L,
    M,
    N,
    O,
    P,
    Q,
    R,
    S,
    T,
    U,
    V,
    W,
    X,
    Y,
    Z,

    /// The Escape key, next to F1.
    Escape,

    F1,
    F2,
    F3,
    F4,
    F5,
    F6,
    F7,
    F8,
    F9,
    F10,
    F11,
    F12,
    F13,
    F14,
    F15,

    /// Print Screen/SysRq.
    Snapshot,
    /// Scroll Lock.
    Scroll,
    /// Pause/Break key, next to Scroll lock.
    Pause,

    /// `Insert`, next to Backspace.
    Insert,
    Home,
    Delete,
    End,
    PageDown,
    PageUp,

    Left,
    Up,
    Right,
    Down,

    /// The Backspace key, right over Enter.
    // TODO: rename
    Back,
    /// The Enter key.
    Return,
    /// The space bar.
    Space,

    Numlock,
    Numpad0,
    Numpad1,
    Numpad2,
    Numpad3,
    Numpad4,
    Numpad5,
    Numpad6,
    Numpad7,
    Numpad8,
    Numpad9,

    AbntC1,
    AbntC2,
    Add,
    Apostrophe,
    Apps,
    At,
    Ax,
    Backslash,
    Calculator,
    Capital,
    Colon,
    Comma,
    Convert,
    Decimal,
    Divide,
    Equals,
    Grave,
    Kana,
    Kanji,
    LAlt,
    LBracket,
    LControl,
    LMenu,
    LShift,
    LWin,
    Mail,
    MediaSelect,
    MediaStop,
    Minus,
    Multiply,
    Mute,
    MyComputer,
    NextTrack,
    NoConvert,
    NumpadComma,
    NumpadEnter,
    NumpadEquals,
    OEM102,
    Period,
    Playpause,
    Power,
    Prevtrack,
    RAlt,
    RBracket,
    RControl,
    RMenu,
    RShift,
    RWin,
    Semicolon,
    Slash,
    Sleep,
    Stop,
    Subtract,
    Sysrq,
    Tab,
    Underline,
    Unlabeled,
    VolumeDown,
    VolumeUp,
    Wake,
    Webback,
    WebFavorites,
    WebForward,
    WebHome,
    WebRefresh,
    WebSearch,
    WebStop,
    Yen,
}