Hi all,
I'm very new to Qt as I'm developing my first application with it. I'm trying
to use StateChart based on QScxmlStateMachine.
It works fine except in a situation where I get a segfault. If, in the demo
code below, you comment the line submitEvent('MY_EVENT') and uncomment the
usage of a ScxmlEvent, the event is dispatched then the application segfaults.
Output is:
StateMachine::active: True
('MY_EVENT:', (), {})
Segmentation fault: 11
Am I doing something wrong or is it a bug? How can I provide you useful
informations in the latter case. I'm running PySide2 (v5.11.2) on macOS (High
Sierra) with Python v2.7.15 (coming from brew).
Thx for your help.
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()'))
@Slot(bool)
def state_machine_active(self, active):
print('StateMachine::active: %s' % active)
self.machine.submitEvent('MY_EVENT')
#ev = QScxmlEvent()
#ev.setName('MY_EVENT')
#ev.setEventType(QScxmlEvent.ExternalEvent)
#self.machine.submitEvent(ev)
@Slot()
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_())
--
Romain
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