Evd.Promise¶

Subclasses:: None

Methods¶

Inherited:: GObject.Object (37), Gio.AsyncResult (4)
Structs:: GObject.ObjectClass (5)

	`cancel` ()
	`get_cancellable` ()
	`get_result_boolean` ()
	`get_result_pointer` ()
	`get_result_size` ()
	`propagate_error` ()
	`then` (callback, *user_data)

Virtual Methods¶

Inherited:: GObject.Object (7), Gio.AsyncResult (3)

Properties¶

None

Signals¶

Inherited:: GObject.Object (1)

Fields¶

Inherited:: GObject.Object (1)

Name	Type	Access	Description
parent	`GObject.Object`	r

Class Details¶

class Evd.Promise(**kwargs)¶

Bases:: GObject.Object, Gio.AsyncResult
Abstract:: No
Structure:: Evd.PromiseClass

cancel()¶: Cancels the asynchronous operation represented by the promise by calling Gio.Cancellable.cancel() on the Gio.Cancellable associated with the promise, if it is not None.

get_cancellable()¶

Returns:: The Gio.Cancellable, or None
Return type:: Gio.Cancellable

Obtains the Gio.Cancellable object associated with the promise, which can be None. Normally, the cancellable is passed to the function that triggered the asynchronous operation represented by the promise.

get_result_boolean()¶

Returns:: The result of the operation as a bool, or False
Return type:: bool

Retrieves the result of the asynchronous operation represented by the promise if it is held as bool, otherwise returns False. It is an error to call this method before the promise has been resolved.

get_result_pointer()¶

Returns:: The result of the operation as a object, or None
Return type:: object or None

Retrieves the result of the asynchronous operation represented by the promise if it is held as a object, otherwise returns None. It is an error to call this method before the promise has been resolved.

get_result_size()¶

Returns:: The result of the operation as a gssize, or zero
Return type:: int

Retrieves the result of the asynchronous operation represented by the promise if it is held as gssize, otherwise returns zero. It is an error to call this method before the promise has been resolved.

propagate_error()¶

Raises:: GLib.Error
Returns:: True if an error was propagated, False otherwise
Return type:: bool

Tells whether an asynchronous operation failed, in which case True is returned and the resulting error copied into error. Otherwise returns False.

It is an error to call this method before the promise has been resolved.

then(callback, *user_data)¶

Parameters:

callback (Gio.AsyncReadyCallback or None) – Function to call when the promise is resolved
user_data (object or None) – Application data to pass in callback

Adds a new listener function to the asynchronous operation represented by the promise. If the operation has not yet completed, callback will be called together with all the other listeners as soon as it completes, in the same order as the listeners were added. If the operation already completed, callback will be called immediately on the next turn of the event loop.