HROOT-graf-0.9: src/HROOT/Graf/TShape/Interface.hs

{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
  TypeSynonymInstances #-}
module HROOT.Graf.TShape.Interface where
import Data.Word
import Foreign.C
import Foreign.Ptr
import FFICXX.Runtime.Cast
import HROOT.Graf.TShape.RawType
import HROOT.Core.TNamed.Interface
import HROOT.Core.TAttLine.Interface
import HROOT.Core.TAttFill.Interface
import HROOT.Core.TAtt3D.Interface

class (ITNamed a, ITAttLine a, ITAttFill a, ITAtt3D a) => ITShape a

upcastTShape :: forall a . (FPtr a, ITShape a) => a -> TShape
upcastTShape h
  = let fh = get_fptr h
        fh2 :: Ptr RawTShape = castPtr fh
      in cast_fptr_to_obj fh2

downcastTShape :: forall a . (FPtr a, ITShape a) => TShape -> a
downcastTShape h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2