Copyright	Will Thompson and Iñaki García Etxebarria
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria
Safe Haskell	Safe-Inferred
Language	Haskell2010

GI.Gtk.Structs.ExpressionWatch

Contents

Description

An opaque structure representing a watched GtkExpression.

The contents of GtkExpressionWatch should only be accessed through the provided API.

Synopsis

Exported types

Memory-managed wrapper type.

Constructors

Instances details

Eq ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch Methods (==) :: ExpressionWatch -> ExpressionWatch -> Bool # (/=) :: ExpressionWatch -> ExpressionWatch -> Bool #
GBoxed ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch
ManagedPtrNewtype ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch Methods toManagedPtr :: ExpressionWatch -> ManagedPtr ExpressionWatch
TypedObject ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch Methods glibType :: IO GType
HasParentTypes ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch
IsGValue (Maybe ExpressionWatch) Source #	Convert `ExpressionWatch` to and from `GValue`. See `toGValue` and `fromGValue`.
Instance details Defined in GI.Gtk.Structs.ExpressionWatch Methods gvalueGType_ :: IO GType gvalueSet_ :: Ptr GValue -> Maybe ExpressionWatch -> IO () gvalueGet_ :: Ptr GValue -> IO (Maybe ExpressionWatch)
type ParentTypes ExpressionWatch Source #
Instance details Defined in GI.Gtk.Structs.ExpressionWatch type ParentTypes ExpressionWatch = '[] :: [Type]

Methods

Expand

None.

None.

Arguments

:: (HasCallStack, MonadIO m)
=> ExpressionWatch	`watch`: a `GtkExpressionWatch`
-> GValue	`value`: an empty `GValue` to be set
-> m Bool	Returns: `TRUE` if the expression could be evaluated and `value` was set

Evaluates the watched expression and on success stores the result in value.

This is equivalent to calling expressionEvaluate with the expression and this pointer originally used to create watch.

Arguments

:: (HasCallStack, MonadIO m)
=> ExpressionWatch	`watch`: a `GtkExpressionWatch`
-> m ExpressionWatch	Returns: the `GtkExpressionWatch` with an additional reference

Acquires a reference on the given GtkExpressionWatch.

Arguments

Releases a reference on the given GtkExpressionWatch.

If the reference was the last, the resources associated to self are freed.

Arguments

Stops watching an expression.

See expressionWatch for how the watch was established.