TKeyEventKind = enum 
  down, up

TKeyEvent = tuple[key: TKey, event: TKeyEventKind]

TButtonEvent = tuple[button: int, event: TKeyEventKind]

proc resetKeyEvents() {.inline.}

proc resetButtonEvents() {.inline.}

proc addKeyEvent(key: TKey; event: TKeyEventKind) {.inline.}

proc addButtonEvent(btn: int; event: TKeyEventKind) {.inline.}

proc isKeyEvent(key: TKey; event: TKeyEventKind): bool

proc isButtonEvent(btn: int; event: TKeyEventKind): bool

proc keyPressed(key: TKey): bool {.inline.}

proc buttonPressed(btn: int): bool {.inline.}

proc mousePos(): TPoint {.inline.}

proc mouseRelativePos(): TPoint {.inline.}

template isKeyDown(key: TKey): bool

template isKeyUp(key: TKey): bool

template isButtonDown(btn: int): bool

template isButtonUp(btn: int): bool