content: {-# LANGUAGE FlexibleInstances #-}
  {-# LANGUAGE OverloadedStrings #-}
  {-# LANGUAGE DataKinds #-}
  {-# LANGUAGE TypeSynonymInstances #-}
  
  {-# OPTIONS_GHC -fno-warn-orphans  #-}
  
  module IHaskell.Display.Widgets.Box.HBox
    ( -- * The HBox widget
      HBox
      -- * Constructor
    , mkHBox
    ) where
  
  -- To keep `cabal repl` happy when running from the ihaskell repo
  import           Prelude
  
  import           Data.Aeson
  import           Data.IORef (newIORef)
  
  import           IHaskell.Display
  import           IHaskell.Eval.Widgets
  import           IHaskell.IPython.Message.UUID as U
  
  import           IHaskell.Display.Widgets.Types
  import           IHaskell.Display.Widgets.Layout.LayoutWidget
  
  -- | A 'HBox' represents a HBox widget from IPython.html.widgets.
  type HBox = IPythonWidget HBoxType
  
  -- | Create a new HBox
  mkHBox :: IO HBox
  mkHBox = do
    -- Default properties, with a random uuid
    wid <- U.random
    layout <- mkLayout
  
    let widgetState = WidgetState $ defaultBoxWidget "HBoxView" "HBoxModel" layout
  
    stateIO <- newIORef widgetState
  
    let hBox = IPythonWidget wid stateIO
  
    -- Open a comm for this widget, and store it in the kernel state
    widgetSendOpen hBox $ toJSON widgetState
  
    -- Return the widget
    return hBox
  
  instance IHaskellWidget HBox where
    getCommUUID = uuid
  