def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.firstStep = FirstStepWidget()
self.secondStep = SecondStepWidget()
self.secondAndHalfStep = SecondAndHalfStepWidget()
self.thirdStep = ThirdStepWidget()
self.setCentralWidget(self.firstStep)
self.connect(self.firstStep, QtCore.SIGNAL("nextStep()"),
self.showSecondStepAfterFirst)
self.connect(self.secondStep, QtCore.SIGNAL("previousStep()"),
self.showFirstStep)
self.connect(self.secondStep, QtCore.SIGNAL("nextStep()"),
self.showStepAfterSecond)
self.connect(self.secondAndHalfStep, QtCore.SIGNAL("previousStep()"),
self.showSecondStepAfterSecondAndHalf)
self.connect(self.secondAndHalfStep, QtCore.SIGNAL("nextStep()"),
self.showThirdStep)
self.connect(self.thirdStep, QtCore.SIGNAL("previousStep()"),
self.showStepBeforeThird)
self.connect(self.thirdStep, QtCore.SIGNAL("loadDevices()"),
self.loadDevices)
