Data.GI.Base.GValue

Constructing GValues

newtype GValue

Haskell-side representation of a GValue.

Constructors

GValue (ManagedPtr GValue)

Instances

HasParentTypes GValue

GBoxed GValue

GValues are registered as boxed in the GLib type system.

TypedObject GValue

Find the associated GType for GValue.

Methods

glibType :: IO GType

type ParentTypes GValue

type ParentTypes GValue = ([] :: [*])

class IsGValue a where

A convenience class for marshaling back and forth between Haskell values and GValues.

Minimal complete definition

toGValue, fromGValue

Methods

toGValue :: a -> IO GValue

fromGValue :: GValue -> IO a

Instances

IsGValue Bool

Methods

toGValue :: Bool -> IO GValue

fromGValue :: GValue -> IO Bool

IsGValue Double

Methods

toGValue :: Double -> IO GValue

fromGValue :: GValue -> IO Double

IsGValue Float

Methods

toGValue :: Float -> IO GValue

fromGValue :: GValue -> IO Float

IsGValue Int32

Methods

toGValue :: Int32 -> IO GValue

fromGValue :: GValue -> IO Int32

IsGValue Int64

Methods

toGValue :: Int64 -> IO GValue

fromGValue :: GValue -> IO Int64

IsGValue Word32

Methods

toGValue :: Word32 -> IO GValue

fromGValue :: GValue -> IO Word32

IsGValue Word64

Methods

toGValue :: Word64 -> IO GValue

fromGValue :: GValue -> IO Word64

IsGValue CInt

Methods

toGValue :: CInt -> IO GValue

fromGValue :: GValue -> IO CInt

IsGValue CUInt

Methods

toGValue :: CUInt -> IO GValue

fromGValue :: GValue -> IO CUInt

IsGValue CLong

Methods

toGValue :: CLong -> IO GValue

fromGValue :: GValue -> IO CLong

IsGValue CULong

Methods

toGValue :: CULong -> IO GValue

fromGValue :: GValue -> IO CULong

IsGValue GType

Methods

toGValue :: GType -> IO GValue

fromGValue :: GValue -> IO GType

IsGValue (Maybe String)

Methods

toGValue :: Maybe String -> IO GValue

fromGValue :: GValue -> IO (Maybe String)

IsGValue (Maybe Text)

Methods

toGValue :: Maybe Text -> IO GValue

fromGValue :: GValue -> IO (Maybe Text)

IsGValue (StablePtr a)

Methods

toGValue :: StablePtr a -> IO GValue

fromGValue :: GValue -> IO (StablePtr a)

IsGValue (Ptr a)

Methods

toGValue :: Ptr a -> IO GValue

fromGValue :: GValue -> IO (Ptr a)

data GValueConstruct o

A type holding a GValue with an associated label. It is parameterized by a phantom type encoding the target type for the GValue (useful when constructing properties).

Constructors

GValueConstruct String GValue

newGValue :: GType -> IO GValue

Build a new, empty, GValue of the given type.

buildGValue :: GType -> (GValue -> a -> IO ()) -> a -> IO GValue

A convenience function for building a new GValue and setting the initial value.

disownGValue :: GValue -> IO (Ptr GValue)

Disown a GValue, i.e. do not unref the underlying object when the Haskell object is garbage collected.

noGValue :: Maybe GValue

A convenience alias for Nothing :: Maybe GValue.

newGValueFromPtr :: Ptr GValue -> IO GValue

Construct a Haskell wrapper for the given GValue, making a copy.

wrapGValuePtr :: Ptr GValue -> IO GValue

Take ownership of a passed in Ptr.

unsetGValue :: Ptr GValue -> IO ()

Unset the GValue, freeing all resources associated to it.

gvalueType :: GValue -> IO GType

Return the GType contained by a GValue.

Packing GValues into arrays

packGValueArray :: [GValue] -> IO (Ptr GValue)

Pack the given list of GValues contiguously into a C array

unpackGValueArrayWithLength :: Integral a => a -> Ptr GValue -> IO [GValue]

Unpack an array of contiguous GValues into a list of GValues.

mapGValueArrayWithLength :: Integral a => a -> (Ptr GValue -> IO c) -> Ptr GValue -> IO ()

Map over the GValues inside a C array.

Setters and getters

set_string :: GValue -> Maybe Text -> IO ()

get_string :: GValue -> IO (Maybe Text)

set_pointer :: GValue -> Ptr a -> IO ()

get_pointer :: GValue -> IO (Ptr b)

set_int :: GValue -> CInt -> IO ()

get_int :: GValue -> IO CInt

set_uint :: GValue -> CUInt -> IO ()

get_uint :: GValue -> IO CUInt

set_long :: GValue -> CLong -> IO ()

get_long :: GValue -> IO CLong

set_ulong :: GValue -> CULong -> IO ()

get_ulong :: GValue -> IO CULong

set_int32 :: GValue -> Int32 -> IO ()

get_int32 :: GValue -> IO Int32

set_uint32 :: GValue -> Word32 -> IO ()

get_uint32 :: GValue -> IO Word32

set_int64 :: GValue -> Int64 -> IO ()

get_int64 :: GValue -> IO Int64

set_uint64 :: GValue -> Word64 -> IO ()

get_uint64 :: GValue -> IO Word64

set_float :: GValue -> Float -> IO ()

get_float :: GValue -> IO Float

set_double :: GValue -> Double -> IO ()

get_double :: GValue -> IO Double

set_boolean :: GValue -> Bool -> IO ()

get_boolean :: GValue -> IO Bool

set_gtype :: GValue -> GType -> IO ()

get_gtype :: GValue -> IO GType

set_object :: GObject a => GValue -> Ptr a -> IO ()

get_object :: GObject b => GValue -> IO (Ptr b)

set_boxed :: GValue -> Ptr a -> IO ()

get_boxed :: GValue -> IO (Ptr b)

set_variant :: GValue -> Ptr GVariant -> IO ()

get_variant :: GValue -> IO (Ptr GVariant)

set_enum :: GValue -> CUInt -> IO ()

get_enum :: GValue -> IO CUInt

set_flags :: GValue -> CUInt -> IO ()

get_flags :: GValue -> IO CUInt

set_stablePtr :: GValue -> StablePtr a -> IO ()

Set the value of GValue containing a StablePtr

get_stablePtr :: GValue -> IO (StablePtr a)

Get the value of a GValue containing a StablePtr

take_stablePtr :: Ptr GValue -> StablePtr a -> IO ()

Like set_stablePtr, but the GValue takes ownership of the StablePtr