QScxmlDataModel

The QScxmlDataModel class is the data model base class for a Qt SCXML state machine. More…

Inherited by: QScxmlCppDataModel, QScxmlEcmaScriptDataModel, QScxmlNullDataModel

New in version 5.12.

Synopsis

Functions

• def setStateMachine (stateMachine)

• def stateMachine ()

Virtual functions

• def evaluateAssignment (id, ok)

• def evaluateForeach (id, ok, body)

• def evaluateInitialization (id, ok)

• def evaluateToBool (id)

• def evaluateToString (id)

• def evaluateToVariant (id)

• def evaluateToVoid (id, ok)

• def hasScxmlProperty (name)

• def scxmlProperty (name)

• def setScxmlEvent (event)

• def setScxmlProperty (name, value, context)

• def setup (initialDataValues)

Signals

• def stateMachineChanged (stateMachine)

Detailed Description

SCXML data models are described in SCXML Specification - 5 Data Model and Data Manipulation . For more information about supported data models, see SCXML Compliance .

One data model can only belong to one state machine.

See also

QScxmlStateMachine QScxmlCppDataModel QScxmlEcmaScriptDataModel QScxmlNullDataModel

class QScxmlDataModel([parent=None])

param parent

QObject

Creates a new data model, with the parent object parent .

PySide2.QtScxml.QScxmlDataModel.evaluateAssignment(id, ok)

Parameters

• id – int

• ok – bool

Evaluates the assignment pointed to by id and sets ok to false if there was an error or to true if there was not.

PySide2.QtScxml.QScxmlDataModel.evaluateForeach(id, ok, body)

Parameters

• id – int

• ok – bool

• body – ForeachLoopBody

Evaluates the foreach loop pointed to by id and sets ok to false if there was an error or to true if there was not. The body is executed on each iteration.

PySide2.QtScxml.QScxmlDataModel.evaluateInitialization(id, ok)

Parameters

• id – int

• ok – bool

Evaluates the initialization pointed to by id and sets ok to false if there was an error or to true if there was not.

PySide2.QtScxml.QScxmlDataModel.evaluateToBool(id)

Parameters

id – int

Return type

bool

Evaluates the executable content pointed to by id and sets ok to false if there was an error or to true if there was not. Returns the result of the evaluation as a boolean value.

PySide2.QtScxml.QScxmlDataModel.evaluateToString(id)

Parameters

id – int

Return type

unicode

Evaluates the executable content pointed to by id and sets ok to false if there was an error or to true if there was not. Returns the result of the evaluation as a QString .

PySide2.QtScxml.QScxmlDataModel.evaluateToVariant(id)

Parameters

id – int

Return type

object

Evaluates the executable content pointed to by id and sets ok to false if there was an error or to true if there was not. Returns the result of the evaluation as a QVariant .

PySide2.QtScxml.QScxmlDataModel.evaluateToVoid(id, ok)

Parameters

• id – int

• ok – bool

Evaluates the executable content pointed to by id and sets ok to false if there was an error or to true if there was not. The execution is expected to return no result.

PySide2.QtScxml.QScxmlDataModel.hasScxmlProperty(name)

Parameters

name – unicode

Return type

bool

Returns true if a property with the given name exists, false otherwise.

PySide2.QtScxml.QScxmlDataModel.scxmlProperty(name)

Parameters

name – unicode

Return type

object

Returns the value of the property name .

See also

setScxmlProperty()

PySide2.QtScxml.QScxmlDataModel.setScxmlEvent(event)

Parameters

event – QScxmlEvent

Sets the event to use in the subsequent executable content execution.

PySide2.QtScxml.QScxmlDataModel.setScxmlProperty(name, value, context)

Parameters

• name – unicode

• value – object

• context – unicode

Return type

bool

Sets a the value value for the property name .

The context is a string that is used in error messages to indicate the location in the SCXML file where the error occurred.

Returns true if successful or false if an error occurred.

See also

scxmlProperty()

PySide2.QtScxml.QScxmlDataModel.setStateMachine(stateMachine)

Parameters

stateMachine – QScxmlStateMachine

Sets the state machine this model belongs to to stateMachine . There is a 1:1 relation between state machines and models. After setting the state machine once you cannot change it anymore. Any further attempts to set the state machine using this method will be ignored.

See also

stateMachine()

PySide2.QtScxml.QScxmlDataModel.setup(initialDataValues)

Parameters

initialDataValues – QVariantMap

Return type

bool

Initializes the data model with the initial values specified by initialDataValues .

Returns false if parse errors occur or if any of the initialization steps fail. Returns true otherwise.

PySide2.QtScxml.QScxmlDataModel.stateMachine()

Return type

QScxmlStateMachine

Returns the state machine associated with the data model.

See also

setStateMachine()

PySide2.QtScxml.QScxmlDataModel.stateMachineChanged(stateMachine)

Parameters

stateMachine – QScxmlStateMachine