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#!/usr/bin/env python
#Author velociraptor Genjix <aphidia@hotmail.com>
from PySide.QtGui import *
from PySide.QtCore import *
class Factorial(QObject):
xChanged = Signal(int)
def __init__(self):
super(Factorial, self).__init__()
self.xval = -1
self.facval = 1
def getX(self):
return self.xval
def setX(self, x):
if self.xval == x:
return
self.xval = x
self.xChanged.emit(x)
x = Property(int, getX, setX)
def getFact(self):
return self.facval
def setFact(self, fac):
self.facval = fac
fac = Property(int, getFact, setFact)
class FactorialLoopTransition(QSignalTransition):
def __init__(self, fact):
super(FactorialLoopTransition, self).__init__(fact, SIGNAL('xChanged(int)'))
self.fact = fact
def eventTest(self, e):
if not super(FactorialLoopTransition, self).eventTest(e):
return False
return e.arguments()[0] > 1
def onTransition(self, e):
x = e.arguments()[0]
fac = self.fact.fac
self.fact.fac = x * fac
self.fact.x = x - 1
class FactorialDoneTransition(QSignalTransition):
def __init__(self, fact):
super(FactorialDoneTransition, self).__init__(fact, SIGNAL('xChanged(int)'))
self.fact = fact
def eventTest(self, e):
if not super(FactorialDoneTransition, self).eventTest(e):
return False
return e.arguments()[0] <= 1
def onTransition(self, e):
print(self.fact.fac)
if __name__ == '__main__':
import sys
app = QCoreApplication(sys.argv)
factorial = Factorial()
machine = QStateMachine()
compute = QState(machine)
compute.assignProperty(factorial, 'fac', 1)
compute.assignProperty(factorial, 'x', 6)
compute.addTransition(FactorialLoopTransition(factorial))
done = QFinalState(machine)
doneTransition = FactorialDoneTransition(factorial)
doneTransition.setTargetState(done)
compute.addTransition(doneTransition)
machine.setInitialState(compute)
machine.finished.connect(app.quit)
machine.start()
sys.exit(app.exec_())
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