GI.JavaScriptCore.Objects.WeakValue

No description available in the introspection data.

Exported types

newtype WeakValue

Memory-managed wrapper type.

Constructors

WeakValue (ManagedPtr WeakValue)

Instances

GObject WeakValue

Defined in GI.JavaScriptCore.Objects.WeakValue

Methods

gobjectType :: IO GType

HasParentTypes WeakValue

Defined in GI.JavaScriptCore.Objects.WeakValue

type ParentTypes WeakValue

Defined in GI.JavaScriptCore.Objects.WeakValue

type ParentTypes WeakValue = Object ': ([] :: [Type])

class (GObject o, IsDescendantOf WeakValue o) => IsWeakValue o

Type class for types which can be safely cast to WeakValue, for instance with toWeakValue.

Instances

(GObject o, IsDescendantOf WeakValue o) => IsWeakValue o

Defined in GI.JavaScriptCore.Objects.WeakValue

toWeakValue :: (MonadIO m, IsWeakValue o) => o -> m WeakValue

Cast to WeakValue, for types for which this is known to be safe. For general casts, use castTo.

noWeakValue :: Maybe WeakValue

A convenience alias for Nothing :: Maybe WeakValue.

Methods

getValue

weakValueGetValue

Arguments

:: (HasCallStack, MonadIO m, IsWeakValue a)

=> a

weakValue: a WeakValue

-> m Value

Returns: a new Value or Nothing if weakValue was cleared.

Get a Value referencing the JavaScript value of weakValue.

new

weakValueNew

Arguments

:: (HasCallStack, MonadIO m, IsValue a)

=> a

value: a Value

-> m WeakValue

Returns: a new WeakValue

Create a new WeakValue for the JavaScript value referenced by value.

Properties

value

The Value referencing the JavaScript value.

constructWeakValueValue :: (IsWeakValue o, IsValue a) => a -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “value” property. This is rarely needed directly, but it is used by new.

Signals

cleared

type C_WeakValueClearedCallback = Ptr () -> Ptr () -> IO ()

Type for the callback on the (unwrapped) C side.

type WeakValueClearedCallback = IO ()

This signal is emitted when the JavaScript value is destroyed.

afterWeakValueCleared :: (IsWeakValue a, MonadIO m) => a -> WeakValueClearedCallback -> m SignalHandlerId

Connect a signal handler for the “cleared” signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after weakValue #cleared callback

genClosure_WeakValueCleared :: MonadIO m => WeakValueClearedCallback -> m (GClosure C_WeakValueClearedCallback)

Wrap the callback into a GClosure.

mk_WeakValueClearedCallback :: C_WeakValueClearedCallback -> IO (FunPtr C_WeakValueClearedCallback)

Generate a function pointer callable from C code, from a C_WeakValueClearedCallback.

noWeakValueClearedCallback :: Maybe WeakValueClearedCallback

A convenience synonym for Nothing :: Maybe WeakValueClearedCallback.

onWeakValueCleared :: (IsWeakValue a, MonadIO m) => a -> WeakValueClearedCallback -> m SignalHandlerId

Connect a signal handler for the “cleared” signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on weakValue #cleared callback

wrap_WeakValueClearedCallback :: WeakValueClearedCallback -> C_WeakValueClearedCallback

Wrap a WeakValueClearedCallback into a C_WeakValueClearedCallback.