content: {-# LANGUAGE FlexibleInstances #-}
  {-# LANGUAGE OverloadedStrings #-}
  {-# LANGUAGE DataKinds #-}
  {-# LANGUAGE TypeSynonymInstances #-}
  {-# LANGUAGE TypeApplications #-}
  
  {-# OPTIONS_GHC -fno-warn-orphans  #-}
  
  module IHaskell.Display.Widgets.Controller.ControllerAxis
    ( -- * The ControllerAxis Widget
      ControllerAxis
      -- * Constructor
    , mkControllerAxis
    ) where
  
  -- To keep `cabal repl` happy when running from the ihaskell repo
  import           Prelude
  
  import           Data.Aeson
  import           Data.IORef (newIORef)
  import           Data.Vinyl (Rec(..), (<+>))
  
  import           IHaskell.Display
  import           IHaskell.Eval.Widgets
  import           IHaskell.IPython.Message.UUID as U
  
  import           IHaskell.Display.Widgets.Types
  import           IHaskell.Display.Widgets.Common
  import           IHaskell.Display.Widgets.Layout.LayoutWidget
  
  -- | 'ControllerAxis' represents an ControllerAxis widget from IPython.html.widgets.
  type ControllerAxis = IPythonWidget ControllerAxisType
  
  -- | Create a new widget
  mkControllerAxis :: IO ControllerAxis
  mkControllerAxis = do
    -- Default properties, with a random uuid
    wid <- U.random
    layout <- mkLayout
  
    let domAttrs = defaultCoreWidget <+> defaultDOMWidget "ControllerAxisView" "ControllerAxisModel" layout
        axisAttrs = (F @FloatValue =:! 0.0)
                    :& (F @ChangeHandler =:: pure ())
                    :& RNil
        widgetState = WidgetState $ domAttrs <+> axisAttrs
  
    stateIO <- newIORef widgetState
  
    let widget = IPythonWidget wid stateIO
  
    -- Open a comm for this widget, and store it in the kernel state
    widgetSendOpen widget $ toJSON widgetState
  
    -- Return the widget
    return widget
  
  instance IHaskellWidget ControllerAxis where
    getCommUUID = uuid
  