Details
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Bug
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Resolution: Invalid
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Not Evaluated
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None
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5.11.2
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None
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macOS
Description
I'm trying to pass arguments to functions connected to events. The documentation of PySide2.QtScxml.QScxmlStateMachine.connectToEvent [1] says:
The receiver’s method may take a PySide2.QtScxml.QScxmlEvent as a parameter
See the demo code below.
This example code outputs:
QObject::connect: Incompatible sender/receiver arguments
QScxmlInternal::ScxmlEventRouter::eventOccurred(QScxmlEvent) --> Backend::my_event(int)
If I try to change the int argument by QScxmlEvent, it outputs:
QObject::connect: No such slot Backend::my_event(QScxmlEvent)
If I set no argument, it works, but there is no argument (args and kwargs empty).
demo.scxml:
<?xml version="1.0" encoding="UTF-8"?> <scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" binding="early" name="demo.scxml"> <transition type="internal" event="MY_EVENT"/> <state id="StateMachine"/> </scxml>
demo.py:
#!/usr/bin/env python import sys from PySide2.QtCore import QObject, QCoreApplication, SLOT, Slot from PySide2.QtScxml import QScxmlStateMachine, QScxmlEvent class Backend(QObject): def __init__(self, machine): super(Backend, self).__init__() self.machine = machine self.machine.connectToState('StateMachine', self, SLOT('state_machine_active(bool)')) self.machine.connectToEvent('MY_EVENT', self, SLOT('my_event(int)')) @Slot(bool) def state_machine_active(self, active): print('StateMachine::active: %s' % active) self.machine.submitEvent('MY_EVENT') @Slot(int) def my_event(self, *args, **kwargs): print('MY_EVENT:', args, kwargs) if __name__ == '__main__': app = QCoreApplication(sys.argv) machine = QScxmlStateMachine.fromFile('demo.scxml') b = Backend(machine) machine.start() sys.exit(app.exec_())