AttrInt.hs


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

The #PangoAttrInt structure is used to represent attributes with
an integer or enumeration value.
-}

module GI.Pango.Structs.AttrInt
    ( 

-- * Exported types
    AttrInt(..)                             ,
    newZeroAttrInt                          ,
    noAttrInt                               ,


 -- * Properties
-- ** Attr
    attrIntReadAttr                         ,


-- ** Value
    attrIntReadValue                        ,




    ) 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.Pango.Types
import GI.Pango.Callbacks

newtype AttrInt = AttrInt (ForeignPtr AttrInt)
-- | Construct a `AttrInt` struct initialized to zero.
newZeroAttrInt :: MonadIO m => m AttrInt
newZeroAttrInt = liftIO $ callocBytes 24 >>= wrapPtr AttrInt

noAttrInt :: Maybe AttrInt
noAttrInt = Nothing

attrIntReadAttr :: AttrInt -> IO Attribute
attrIntReadAttr s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO (Ptr Attribute)
    val' <- (newPtr 16 Attribute) val
    return val'

attrIntReadValue :: AttrInt -> IO Int32
attrIntReadValue s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO Int32
    return val

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

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

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