QRemoteObjectReplica

A class interacting with (but not implementing) a Qt API on the Remote Object network. More…

Inherited by: QRemoteObjectRegistry, QRemoteObjectDynamicReplica

Synopsis

Functions

• def initializeNode (node[, name=””])

• def isInitialized ()

• def isReplicaValid ()

• def node ()

• def persistProperties (repName, repSig, props)

• def propAsVariant (i)

• def retrieveProperties (repName, repSig)

• def send (call, index, args)

• def sendWithReply (call, index, args)

• def setChild (i, arg__2)

• def state ()

• def waitForSource ([timeout=30000])

Virtual functions

• def initialize ()

• def setNode (node)

Signals

• def initialized ()

• def notified ()

• def stateChanged (state, oldState)

Detailed Description

A Remote Object Replica is a QObject proxy for another QObject (called the Source object). Once initialized, a replica can be considered a “latent copy” of the Source object. That is, every change to a Q_PROPERTY on the Source , or signal emitted by the Source will be updated/emitted by all Replica objects. Latency is introduced by process scheduling by any OSes involved and network communication latency. As long as the replica has been initialized and the communication is not disrupted, receipt and order of changes is guaranteed.

The isInitialized and state properties (and corresponding initialized() / stateChanged() signals) allow the state of a Replica to be determined.

While Qt Remote Objects (QtRO) handles the initialization and synchronization of Replica objects, there are numerous steps happening behind the scenes which can fail and that aren’t encountered in single process Qt applications. See Troubleshooting for advice on how to handle such issues when using a remote objects network.

class PySide6.QtRemoteObjects.QRemoteObjectReplica

PySide6.QtRemoteObjects.QRemoteObjectReplica.State

This enum type specifies the various state codes associated with QRemoteObjectReplica states:

Constant	Description
QRemoteObjectReplica.Uninitialized	Initial value of DynamicReplica, where nothing is known about the replica before connection to source.
QRemoteObjectReplica.Default	Initial value of static replica, where any defaults set in the .rep file are available so it can be used if necessary.
QRemoteObjectReplica.Valid	Indicates the replica is connected, has good property values and can be interacted with.
QRemoteObjectReplica.Suspect	Error state that occurs if the connection to the source is lost after it is initialized.
QRemoteObjectReplica.SignatureMismatch	Error state that occurs if a connection to the source is made, but the source and replica are not derived from the same .rep (only possible for static Replicas).

PySide6.QtRemoteObjects.QRemoteObjectReplica.initialize()

PySide6.QtRemoteObjects.QRemoteObjectReplica.initializeNode(node[, name=""])

Parameters

• node – PySide6.QtRemoteObjects.QRemoteObjectNode

• name – str

PySide6.QtRemoteObjects.QRemoteObjectReplica.initialized()

PySide6.QtRemoteObjects.QRemoteObjectReplica.isInitialized()

Return type

bool

Returns true if this replica has been initialized with data from the Source object. Returns false otherwise.

See also

state()

PySide6.QtRemoteObjects.QRemoteObjectReplica.isReplicaValid()

Return type

bool

Returns true if this replica has been initialized and has a valid connection with the node hosting the Source . Returns false otherwise.

See also

isInitialized()

PySide6.QtRemoteObjects.QRemoteObjectReplica.node()

Return type

PySide6.QtRemoteObjects.QRemoteObjectNode

This property holds A pointer to the node this object was acquired from..

PySide6.QtRemoteObjects.QRemoteObjectReplica.notified()

PySide6.QtRemoteObjects.QRemoteObjectReplica.persistProperties(repName, repSig, props)

Parameters

• repName – str

• repSig – PySide6.QtCore.QByteArray

• props –

PySide6.QtRemoteObjects.QRemoteObjectReplica.propAsVariant(i)

Parameters

i – int

Return type

object

PySide6.QtRemoteObjects.QRemoteObjectReplica.retrieveProperties(repName, repSig)

Parameters

• repName – str

• repSig – PySide6.QtCore.QByteArray

Return type

PySide6.QtRemoteObjects.QRemoteObjectReplica.send(call, index, args)

Parameters

• call – Call

• index – int

• args –

PySide6.QtRemoteObjects.QRemoteObjectReplica.sendWithReply(call, index, args)

Parameters

• call – Call

• index – int

• args –

Return type

PySide6.QtRemoteObjects.QRemoteObjectPendingCall

PySide6.QtRemoteObjects.QRemoteObjectReplica.setChild(i, arg__2)

Parameters

• i – int

• arg__2 – object

PySide6.QtRemoteObjects.QRemoteObjectReplica.setNode(node)

Parameters

node – PySide6.QtRemoteObjects.QRemoteObjectNode

This property holds A pointer to the node this object was acquired from..

PySide6.QtRemoteObjects.QRemoteObjectReplica.state()

Return type

State

This property holds Returns the replica state..

This property holds the replica State .

PySide6.QtRemoteObjects.QRemoteObjectReplica.stateChanged(state, oldState)

Parameters

• state – State

• oldState – State

PySide6.QtRemoteObjects.QRemoteObjectReplica.waitForSource([timeout=30000])

Parameters

timeout – int

Return type

bool

Blocking call that waits for the replica to become initialized or until the timeout (in ms) expires. Returns true if the replica is initialized when the call completes, false otherwise.

If timeout is -1, this function will not time out.

See also

isInitialized() initialized()