AttrColor.hs


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

The #PangoAttrColor structure is used to represent attributes that
are colors.
-}

module GI.Pango.Structs.AttrColor
    ( 

-- * Exported types
    AttrColor(..)                           ,
    newZeroAttrColor                        ,
    noAttrColor                             ,


 -- * Properties
-- ** Attr
    attrColorReadAttr                       ,


-- ** Color
    attrColorReadColor                      ,




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

noAttrColor :: Maybe AttrColor
noAttrColor = Nothing

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

attrColorReadColor :: AttrColor -> IO Color
attrColorReadColor s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO (Ptr Color)
    val' <- (newBoxed Color) val
    return val'

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

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

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