In order to complete various operations, such as unlocking a collection, the service may need to prompt the user for additional information, such as a master password.
The prompts are displayed by the service on behalf of the client application.
Operations that require a prompt to complete will return a prompt object. The client
application must then call the
Prompt()
method of the prompt object to display the prompt. Client applications can use the
window-id
argument to display the prompt attached to their application window.
Once the user provides the additional required information to the prompt, the service
completes the operation that required the prompt. Then it emits the
Completed
signal of the prompt object. The result
argument of
the signal contains operation an operation specific result.
Either the user or the client application can dismiss a prompt. In this case the
operation that required the additional information is cancelled. The client application
can dismiss a prompt by calling the
Dismiss()
method of the prompt object. The Completed
signal will be emitted
with its dismissed
argument set to
TRUE
.
Once the Completed
signal is emitted on a prompt object, it
is no longer valid. Prompt objects are specific to the client application's connection
to the DBus bus. Once an application disconnects, all its prompts are no longer valid.
There is an inherent race between the Dismiss()
method and the
Completed
signal. An application calling Dismiss()
must be prepared to handle the fact that the Completed
has already been
emitted (although perhaps not received by the client). In addition the client must be prepared
to handle the fact that the prompt object is no longer valid.