GI.Gtk.Objects.PropertyExpression

A GObject property value in a GtkExpression.

Exported types

newtype PropertyExpression

Memory-managed wrapper type.

Constructors

PropertyExpression (ManagedPtr PropertyExpression)

Instances

Eq PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

Methods

(==) :: PropertyExpression -> PropertyExpression -> Bool

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

BoxedPtr PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

Methods

boxedPtrCopy :: PropertyExpression -> IO PropertyExpression

boxedPtrFree :: PropertyExpression -> IO ()

ManagedPtrNewtype PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

Methods

toManagedPtr :: PropertyExpression -> ManagedPtr PropertyExpression

TypedObject PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

Methods

glibType :: IO GType

HasParentTypes PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

type ParentTypes PropertyExpression

Defined in GI.Gtk.Objects.PropertyExpression

type ParentTypes PropertyExpression = '[Expression]

class (BoxedPtr o, TypedObject o, IsDescendantOf PropertyExpression o) => IsPropertyExpression o

Type class for types which can be safely cast to PropertyExpression, for instance with toPropertyExpression.

Instances

(BoxedPtr o, TypedObject o, IsDescendantOf PropertyExpression o) => IsPropertyExpression o

Defined in GI.Gtk.Objects.PropertyExpression

toPropertyExpression :: (MonadIO m, IsPropertyExpression o) => o -> m PropertyExpression

Cast to PropertyExpression, 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

getExpression, getPspec, getValueType.

Setters

None.

getExpression

propertyExpressionGetExpression

Arguments

:: (HasCallStack, MonadIO m, IsPropertyExpression a)

=> a

expression: a property GtkExpression

-> m (Maybe Expression)

Returns: the object expression

Gets the expression specifying the object of a property expression.

getPspec

propertyExpressionGetPspec

Arguments

:: (HasCallStack, MonadIO m, IsPropertyExpression a)

=> a

expression: a property GtkExpression

-> m GParamSpec

Returns: the GParamSpec for the property

Gets the GParamSpec specifying the property of a property expression.

new

propertyExpressionNew

Arguments

:: (HasCallStack, MonadIO m, IsExpression a)

=> GType

thisType: The type to expect for the this type

-> Maybe a

expression: Expression to evaluate to get the object to query or NULL to query the this object

-> Text

propertyName: name of the property

-> m PropertyExpression

Returns: a new GtkExpression

Creates an expression that looks up a property.

The object to use is found by evaluating the expression, or using the this argument when expression is NULL.

If the resulting object conforms to this_type, its property named property_name will be queried. Otherwise, this expression's evaluation will fail.

The given this_type must have a property with property_name.

newForPspec

propertyExpressionNewForPspec

Arguments

:: (HasCallStack, MonadIO m, IsExpression a)

=> Maybe a

expression: Expression to evaluate to get the object to query or NULL to query the this object

-> GParamSpec

pspec: the GParamSpec for the property to query

-> m PropertyExpression

Returns: a new GtkExpression

Creates an expression that looks up a property.

The object to use is found by evaluating the expression, or using the this argument when expression is NULL.

If the resulting object conforms to this_type, its property specified by pspec will be queried. Otherwise, this expression's evaluation will fail.