EnumClass.hs


{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

The class of an enumeration type holds information about its
possible values.
-}

module GI.GObject.Structs.EnumClass
    ( 

-- * Exported types
    EnumClass(..)                           ,
    newZeroEnumClass                        ,
    noEnumClass                             ,


 -- * Properties
-- ** GTypeClass
    enumClassReadGTypeClass                 ,


-- ** Maximum
    enumClassReadMaximum                    ,


-- ** Minimum
    enumClassReadMinimum                    ,


-- ** NValues
    enumClassReadNValues                    ,


-- ** Values
    enumClassReadValues                     ,




    ) where

import Prelude ()
import Data.GI.Base.ShortPrelude

import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map

import GI.GObject.Types
import GI.GObject.Callbacks

newtype EnumClass = EnumClass (ForeignPtr EnumClass)
-- | Construct a `EnumClass` struct initialized to zero.
newZeroEnumClass :: MonadIO m => m EnumClass
newZeroEnumClass = liftIO $ callocBytes 32 >>= wrapPtr EnumClass

noEnumClass :: Maybe EnumClass
noEnumClass = Nothing

enumClassReadGTypeClass :: EnumClass -> IO TypeClass
enumClassReadGTypeClass s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO (Ptr TypeClass)
    val' <- (newPtr 8 TypeClass) val
    return val'

enumClassReadMinimum :: EnumClass -> IO Int32
enumClassReadMinimum s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 8) :: IO Int32
    return val

enumClassReadMaximum :: EnumClass -> IO Int32
enumClassReadMaximum s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 12) :: IO Int32
    return val

enumClassReadNValues :: EnumClass -> IO Word32
enumClassReadNValues s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO Word32
    return val

enumClassReadValues :: EnumClass -> IO EnumValue
enumClassReadValues s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 24) :: IO (Ptr EnumValue)
    val' <- (newPtr 24 EnumValue) val
    return val'

type family ResolveEnumClassMethod (t :: Symbol) (o :: *) :: * where
    ResolveEnumClassMethod l o = MethodResolutionFailed l o

instance (info ~ ResolveEnumClassMethod t EnumClass, MethodInfo info EnumClass p) => IsLabelProxy t (EnumClass -> p) where
    fromLabelProxy _ = overloadedMethod (MethodProxy :: MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveEnumClassMethod t EnumClass, MethodInfo info EnumClass p) => IsLabel t (EnumClass -> p) where
    fromLabel _ = overloadedMethod (MethodProxy :: MethodProxy info)
#endif