Gtk.Expression_Watch

Description

An opaque structure representing a watched GtkExpression.

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

Evaluate

function Evaluate
   (Self  : Gtk_Expression_Watch;
    Value : in out Glib.Values.GValue) return Boolean

Evaluates the watched expression and on success stores the result in value. This is equivalent to calling [methodGtk.Expression.evaluate] with the expression and this pointer originally used to create watch.

Parameters

Self

Value

an empty GValue to be set

Return Value

TRUE if the expression could be evaluated and value was set

From_Object

function From_Object (Object : System.Address) return Gtk_Expression_Watch

Parameters

Object

Return Value

From_Object_Free

function From_Object_Free (B : access Gtk_Expression_Watch'Class) return Gtk_Expression_Watch

Parameters

B

Return Value

Get_Type

function Get_Type return Glib.GType

Return Value

Gtk_Expression_Watch

type Gtk_Expression_Watch is new Glib.C_Boxed with null record;

Null_Gtk_Expression_Watch

Null_Gtk_Expression_Watch : constant Gtk_Expression_Watch;

Ref

function Ref (Self : Gtk_Expression_Watch) return Gtk_Expression_Watch

Acquires a reference on the given GtkExpressionWatch.

Parameters

Self

Return Value

the GtkExpressionWatch with an additional reference. Has transfer-ownership='full'.

Unref

procedure Unref (Self : Gtk_Expression_Watch)

Releases a reference on the given GtkExpressionWatch. If the reference was the last, the resources associated to self are freed.

Parameters

Self

has transfer-ownership='full'.

Unwatch

procedure Unwatch (Self : Gtk_Expression_Watch)

Stops watching an expression. See [methodGtk.Expression.watch] for how the watch was established.

Parameters

Self