GI.Gtk.Objects.ObjectExpression

A GObject value in a GtkExpression.

Exported types

newtype ObjectExpression

Memory-managed wrapper type.

Constructors

ObjectExpression (ManagedPtr ObjectExpression)

Instances

Eq ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

Methods

(==) :: ObjectExpression -> ObjectExpression -> Bool

(/=) :: ObjectExpression -> ObjectExpression -> Bool

BoxedPtr ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

Methods

boxedPtrCopy :: ObjectExpression -> IO ObjectExpression

boxedPtrFree :: ObjectExpression -> IO ()

ManagedPtrNewtype ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

Methods

toManagedPtr :: ObjectExpression -> ManagedPtr ObjectExpression

TypedObject ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

Methods

glibType :: IO GType

HasParentTypes ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

type ParentTypes ObjectExpression

Defined in GI.Gtk.Objects.ObjectExpression

type ParentTypes ObjectExpression = '[Expression]

class (BoxedPtr o, TypedObject o, IsDescendantOf ObjectExpression o) => IsObjectExpression o

Type class for types which can be safely cast to ObjectExpression, for instance with toObjectExpression.

Instances

(BoxedPtr o, TypedObject o, IsDescendantOf ObjectExpression o) => IsObjectExpression o

Defined in GI.Gtk.Objects.ObjectExpression

toObjectExpression :: (MonadIO m, IsObjectExpression o) => o -> m ObjectExpression

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

Methods

Click to display all available methods, including inherited ones

Methods

bind, evaluate, isStatic, ref, unref, watch.

Getters

getObject, getValueType.

Setters

None.

getObject

objectExpressionGetObject

Arguments

:: (HasCallStack, MonadIO m, IsObjectExpression a)

=> a

expression: an object GtkExpression

-> m (Maybe Object)

Returns: the object, or NULL

Gets the object that the expression evaluates to.

new

objectExpressionNew

Arguments

:: (HasCallStack, MonadIO m, IsObject a)

=> a

object: object to watch

-> m ObjectExpression

Returns: a new GtkExpression

Creates an expression evaluating to the given object with a weak reference.

Once the object is disposed, it will fail to evaluate.

This expression is meant to break reference cycles.

If you want to keep a reference to object, use ConstantExpression.new().