GI.Gtk.Objects.ConstantExpression

A constant value in a GtkExpression.

Exported types

newtype ConstantExpression

Memory-managed wrapper type.

Constructors

ConstantExpression (ManagedPtr ConstantExpression)

Instances

Eq ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

Methods

(==) :: ConstantExpression -> ConstantExpression -> Bool

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

BoxedPtr ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

Methods

boxedPtrCopy :: ConstantExpression -> IO ConstantExpression

boxedPtrFree :: ConstantExpression -> IO ()

ManagedPtrNewtype ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

Methods

toManagedPtr :: ConstantExpression -> ManagedPtr ConstantExpression

TypedObject ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

Methods

glibType :: IO GType

HasParentTypes ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

type ParentTypes ConstantExpression

Defined in GI.Gtk.Objects.ConstantExpression

type ParentTypes ConstantExpression = '[Expression]

class (BoxedPtr o, TypedObject o, IsDescendantOf ConstantExpression o) => IsConstantExpression o

Type class for types which can be safely cast to ConstantExpression, for instance with toConstantExpression.

Instances

(BoxedPtr o, TypedObject o, IsDescendantOf ConstantExpression o) => IsConstantExpression o

Defined in GI.Gtk.Objects.ConstantExpression

toConstantExpression :: (MonadIO m, IsConstantExpression o) => o -> m ConstantExpression

Cast to ConstantExpression, 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

getValue, getValueType.

Setters

None.

getValue

constantExpressionGetValue

Arguments

:: (HasCallStack, MonadIO m, IsConstantExpression a)

=> a

expression: a constant GtkExpression

-> m GValue

Returns: the value

Gets the value that a constant expression evaluates to.

newForValue

constantExpressionNewForValue

Arguments

:: (HasCallStack, MonadIO m)

=> GValue

value: a GValue

-> m ConstantExpression

Returns: a new GtkExpression

Creates an expression that always evaluates to the given value.