EventKey.hs


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

Describes a key press or key release event.
-}

module GI.Gdk.Structs.EventKey
    ( 

-- * Exported types
    EventKey(..)                            ,
    newZeroEventKey                         ,
    noEventKey                              ,


 -- * Properties
-- ** Group
    eventKeyReadGroup                       ,


-- ** HardwareKeycode
    eventKeyReadHardwareKeycode             ,


-- ** IsModifier
    eventKeyReadIsModifier                  ,


-- ** Keyval
    eventKeyReadKeyval                      ,


-- ** Length
    eventKeyReadLength                      ,


-- ** SendEvent
    eventKeyReadSendEvent                   ,


-- ** State
    eventKeyReadState                       ,


-- ** String
    eventKeyReadString                      ,


-- ** Time
    eventKeyReadTime                        ,


-- ** Type
    eventKeyReadType                        ,


-- ** Window
    eventKeyReadWindow                      ,




    ) 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.Gdk.Types
import GI.Gdk.Callbacks

newtype EventKey = EventKey (ForeignPtr EventKey)
-- | Construct a `EventKey` struct initialized to zero.
newZeroEventKey :: MonadIO m => m EventKey
newZeroEventKey = liftIO $ callocBytes 56 >>= wrapPtr EventKey

noEventKey :: Maybe EventKey
noEventKey = Nothing

eventKeyReadType :: EventKey -> IO EventType
eventKeyReadType s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO CUInt
    let val' = (toEnum . fromIntegral) val
    return val'

eventKeyReadWindow :: EventKey -> IO Window
eventKeyReadWindow s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 8) :: IO (Ptr Window)
    val' <- (newObject Window) val
    return val'

eventKeyReadSendEvent :: EventKey -> IO Int8
eventKeyReadSendEvent s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO Int8
    return val

eventKeyReadTime :: EventKey -> IO Word32
eventKeyReadTime s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 20) :: IO Word32
    return val

eventKeyReadState :: EventKey -> IO [ModifierType]
eventKeyReadState s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 24) :: IO CUInt
    let val' = wordToGFlags val
    return val'

eventKeyReadKeyval :: EventKey -> IO Word32
eventKeyReadKeyval s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 28) :: IO Word32
    return val

eventKeyReadLength :: EventKey -> IO Int32
eventKeyReadLength s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 32) :: IO Int32
    return val

eventKeyReadString :: EventKey -> IO T.Text
eventKeyReadString s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 40) :: IO CString
    val' <- cstringToText val
    return val'

eventKeyReadHardwareKeycode :: EventKey -> IO Word16
eventKeyReadHardwareKeycode s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 48) :: IO Word16
    return val

eventKeyReadGroup :: EventKey -> IO Word8
eventKeyReadGroup s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 50) :: IO Word8
    return val

eventKeyReadIsModifier :: EventKey -> IO Word32
eventKeyReadIsModifier s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 52) :: IO Word32
    return val

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

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

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