Data.GI.Base.GValue

Constructing GValues

newtype GValue

Haskell-side representation of a GValue.

Constructors

GValue (ManagedPtr GValue)

Instances

GBoxed GValue

GValues are registered as boxed in the GLib type system.

Defined in Data.GI.Base.GValue

TypedObject GValue

Find the associated GType for GValue.

Defined in Data.GI.Base.GValue

Methods

glibType :: IO GType

HasParentTypes GValue

Defined in Data.GI.Base.GValue

type ParentTypes GValue

There are no types in the bindings that a GValue can be safely cast to.

Defined in Data.GI.Base.GValue

type ParentTypes GValue = '[] :: [Type]

class IsGValue a where

Class for types that can be marshaled back and forth between Haskell values and GValues. These are low-level methods, you might want to use toGValue and fromGValue instead for a higher level interface.

Methods

gvalueGType_

Arguments

:: IO GType

GType for the GValue containing values of this type.

gvalueSet_

Arguments

:: Ptr GValue

-> a

-> IO ()

Set the GValue to the given Haskell value.

gvalueGet_

Arguments

:: Ptr GValue

-> IO a

Get the Haskel value inside the GValue.

Instances

IsGValue CInt

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> CInt -> IO ()

gvalueGet_ :: Ptr GValue -> IO CInt

IsGValue CLong

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> CLong -> IO ()

gvalueGet_ :: Ptr GValue -> IO CLong

IsGValue CUInt

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> CUInt -> IO ()

gvalueGet_ :: Ptr GValue -> IO CUInt

IsGValue CULong

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> CULong -> IO ()

gvalueGet_ :: Ptr GValue -> IO CULong

IsGValue Int32

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Int32 -> IO ()

gvalueGet_ :: Ptr GValue -> IO Int32

IsGValue Int64

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Int64 -> IO ()

gvalueGet_ :: Ptr GValue -> IO Int64

IsGValue Word32

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Word32 -> IO ()

gvalueGet_ :: Ptr GValue -> IO Word32

IsGValue Word64

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Word64 -> IO ()

gvalueGet_ :: Ptr GValue -> IO Word64

IsGValue GType

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> GType -> IO ()

gvalueGet_ :: Ptr GValue -> IO GType

IsGValue Bool

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Bool -> IO ()

gvalueGet_ :: Ptr GValue -> IO Bool

IsGValue Double

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Double -> IO ()

gvalueGet_ :: Ptr GValue -> IO Double

IsGValue Float

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Float -> IO ()

gvalueGet_ :: Ptr GValue -> IO Float

IsGValue (Ptr a)

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

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

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

IsGValue (StablePtr a)

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

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

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

IsGValue (Maybe GParamSpec)

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe GParamSpec -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe GParamSpec)

IsGValue (Maybe Text)

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe Text -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe Text)

IsGValue (Maybe String)

Defined in Data.GI.Base.GValue

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe String -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe String)

toGValue :: (IsGValue a, MonadIO m) => a -> m GValue

Create a GValue from the given Haskell value.

fromGValue :: (IsGValue a, MonadIO m) => GValue -> m a

Create a Haskell object out of the given GValue.

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

ptr_to_gvalue_free :: FunPtr (Ptr GValue -> IO ())

A pointer to a function freeing GValues.

newGValue :: GType -> IO GValue

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

buildGValue :: GType -> (Ptr 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 convenient 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_object :: GObject a => Ptr GValue -> Ptr a -> IO ()

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

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

get_boxed :: Ptr GValue -> IO (Ptr b)

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

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

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

get_enum :: Ptr GValue -> IO CUInt

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

get_flags :: Ptr GValue -> IO CUInt

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

Set the value of GValue containing a StablePtr

get_stablePtr :: Ptr 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

set_param :: Ptr GValue -> Maybe GParamSpec -> IO ()

Set the value of GValue containing a GParamSpec

get_param :: Ptr GValue -> IO (Maybe GParamSpec)

Get the value of a GValue containing a GParamSpec