PageRange.hs


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

See also gtk_print_settings_set_page_ranges().
-}

module GI.Gtk.Structs.PageRange
    ( 

-- * Exported types
    PageRange(..)                           ,
    newZeroPageRange                        ,
    noPageRange                             ,


 -- * Properties
-- ** End
    pageRangeReadEnd                        ,


-- ** Start
    pageRangeReadStart                      ,




    ) 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.Gtk.Types
import GI.Gtk.Callbacks

newtype PageRange = PageRange (ForeignPtr PageRange)
-- | Construct a `PageRange` struct initialized to zero.
newZeroPageRange :: MonadIO m => m PageRange
newZeroPageRange = liftIO $ callocBytes 8 >>= wrapPtr PageRange

noPageRange :: Maybe PageRange
noPageRange = Nothing

pageRangeReadStart :: PageRange -> IO Int32
pageRangeReadStart s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO Int32
    return val

pageRangeReadEnd :: PageRange -> IO Int32
pageRangeReadEnd s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 4) :: IO Int32
    return val

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

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

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