python3+PyQt5+Qt Designer实现堆叠窗口部件

import sysfrom PyQt5.QtCore import (Qt)from PyQt5.QtWidgets import (QApplication, QComboBox, QDialog,  QDialogButtonBox, QFrame, QGridLayout, QHBoxLayout, QLabel,  QSpinBox, QStackedWidget, QVBoxLayout, QWidget)class VehicleRentalDlg(QDialog): def __init__(self, parent=None):  super(VehicleRentalDlg, self).__init__(parent)  vehicleLabel = QLabel("&Vehicle Type:")  self.vehicleComboBox = QComboBox()  vehicleLabel.setBuddy(self.vehicleComboBox)  self.vehicleComboBox.addItems(["Car", "Van"])  colorLabel = QLabel("Co&lor:")  self.colorComboBox = QComboBox()  colorLabel.setBuddy(self.colorComboBox)  self.colorComboBox.addItems(["Black", "Blue", "Green", "Red",          "Silver", "White", "Yellow"])  seatsLabel = QLabel("&Seats:")  self.seatsSpinBox = QSpinBox()  seatsLabel.setBuddy(self.seatsSpinBox)  self.seatsSpinBox.setRange(2, 12)  self.seatsSpinBox.setValue(4)  self.seatsSpinBox.setAlignment(Qt.AlignRight|Qt.AlignVCenter)  weightLabel = QLabel("&Weight:")  self.weightSpinBox = QSpinBox()  weightLabel.setBuddy(self.weightSpinBox)  self.weightSpinBox.setRange(1, 8)  self.weightSpinBox.setValue(1)  self.weightSpinBox.setAlignment(Qt.AlignRight|Qt.AlignVCenter)  self.weightSpinBox.setSuffix(" tons")  volumeLabel = QLabel("Volu&me")  self.volumeSpinBox = QSpinBox()  volumeLabel.setBuddy(self.volumeSpinBox)  self.volumeSpinBox.setRange(4, 22)  self.volumeSpinBox.setValue(10)  self.volumeSpinBox.setAlignment(Qt.AlignRight|Qt.AlignVCenter)  self.volumeSpinBox.setSuffix(" cu m")  mileageLabel = QLabel("Max. Mileage")  self.mileageLabel = QLabel("1000 miles")  self.mileageLabel.setAlignment(Qt.AlignRight|Qt.AlignVCenter)  self.mileageLabel.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)  self.buttonBox = QDialogButtonBox(QDialogButtonBox.Ok|           QDialogButtonBox.Cancel)  self.stackedWidget = QStackedWidget()  carWidget = QWidget()  carLayout = QGridLayout()  carLayout.addWidget(colorLabel, 0, 0)  carLayout.addWidget(self.colorComboBox, 0, 1)  carLayout.addWidget(seatsLabel, 1, 0)  carLayout.addWidget(self.seatsSpinBox, 1, 1)  carWidget.setLayout(carLayout)  self.stackedWidget.addWidget(carWidget)  vanWidget = QWidget()  vanLayout = QGridLayout()  vanLayout.addWidget(weightLabel, 0, 0)  vanLayout.addWidget(self.weightSpinBox, 0, 1)  vanLayout.addWidget(volumeLabel, 1, 0)  vanLayout.addWidget(self.volumeSpinBox, 1, 1)  vanWidget.setLayout(vanLayout)  self.stackedWidget.addWidget(vanWidget)  topLayout = QHBoxLayout()  topLayout.addWidget(vehicleLabel)  topLayout.addWidget(self.vehicleComboBox)  bottomLayout = QHBoxLayout()  bottomLayout.addWidget(mileageLabel)  bottomLayout.addWidget(self.mileageLabel)  layout = QVBoxLayout()  layout.addLayout(topLayout)  layout.addWidget(self.stackedWidget)  layout.addLayout(bottomLayout)  layout.addWidget(self.buttonBox)  self.setLayout(layout)  self.buttonBox.accepted.connect(self.accept)  self.buttonBox.rejected.connect(self.reject)  self.vehicleComboBox.currentIndexChanged[str].connect(self.setWidgetStack)  self.weightSpinBox.valueChanged[int].connect(self.weightChanged)  self.setWindowTitle("Vehicle Rental") def setWidgetStack(self, text):  if text == "Car":   self.stackedWidget.setCurrentIndex(0)   self.mileageLabel.setText("1000 miles")  else:   self.stackedWidget.setCurrentIndex(1)   self.weightChanged(self.weightSpinBox.value()) def weightChanged(self, amount):  self.mileageLabel.setText("{0} miles".format(8000 / amount))app = QApplication(sys.argv)form = VehicleRentalDlg()form.show()app.exec_()

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file '/home/yrd/eric_workspace/Vehicle/vehiclerentaldlg.ui'## Created by: PyQt5 UI code generator 5.7## WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_VehicleRentalDlg(object): def setupUi(self, VehicleRentalDlg):  VehicleRentalDlg.setObjectName("VehicleRentalDlg")  VehicleRentalDlg.resize(206, 246)  self.gridlayout = QtWidgets.QGridLayout(VehicleRentalDlg)  self.gridlayout.setContentsMargins(9, 9, 9, 9)  self.gridlayout.setSpacing(6)  self.gridlayout.setObjectName("gridlayout")  self.buttonBox = QtWidgets.QDialogButtonBox(VehicleRentalDlg)  self.buttonBox.setOrientation(QtCore.Qt.Horizontal)  self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)  self.buttonBox.setObjectName("buttonBox")  self.gridlayout.addWidget(self.buttonBox, 4, 0, 1, 1)  spacerItem = QtWidgets.QSpacerItem(188, 16, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)  self.gridlayout.addItem(spacerItem, 3, 0, 1, 1)  self.hboxlayout = QtWidgets.QHBoxLayout()  self.hboxlayout.setContentsMargins(0, 0, 0, 0)  self.hboxlayout.setSpacing(6)  self.hboxlayout.setObjectName("hboxlayout")  self.label_6 = QtWidgets.QLabel(VehicleRentalDlg)  self.label_6.setObjectName("label_6")  self.hboxlayout.addWidget(self.label_6)  self.mileageLabel = QtWidgets.QLabel(VehicleRentalDlg)  self.mileageLabel.setFrameShape(QtWidgets.QFrame.StyledPanel)  self.mileageLabel.setFrameShadow(QtWidgets.QFrame.Sunken)  self.mileageLabel.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)  self.mileageLabel.setObjectName("mileageLabel")  self.hboxlayout.addWidget(self.mileageLabel)  self.gridlayout.addLayout(self.hboxlayout, 2, 0, 1, 1)  self.stackedWidget = QtWidgets.QStackedWidget(VehicleRentalDlg)  self.stackedWidget.setObjectName("stackedWidget")  self.page_2 = QtWidgets.QWidget()  self.page_2.setObjectName("page_2")  self.gridlayout1 = QtWidgets.QGridLayout(self.page_2)  self.gridlayout1.setContentsMargins(9, 9, 9, 9)  self.gridlayout1.setSpacing(6)  self.gridlayout1.setObjectName("gridlayout1")  self.colorComboBox = QtWidgets.QComboBox(self.page_2)  self.colorComboBox.setObjectName("colorComboBox")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.colorComboBox.addItem("")  self.gridlayout1.addWidget(self.colorComboBox, 0, 1, 1, 1)  self.label_4 = QtWidgets.QLabel(self.page_2)  self.label_4.setObjectName("label_4")  self.gridlayout1.addWidget(self.label_4, 0, 0, 1, 1)  self.label_5 = QtWidgets.QLabel(self.page_2)  self.label_5.setObjectName("label_5")  self.gridlayout1.addWidget(self.label_5, 1, 0, 1, 1)  self.seatsSpinBox = QtWidgets.QSpinBox(self.page_2)  self.seatsSpinBox.setAlignment(QtCore.Qt.AlignRight)  self.seatsSpinBox.setMinimum(2)  self.seatsSpinBox.setMaximum(12)  self.seatsSpinBox.setProperty("value", 4)  self.seatsSpinBox.setObjectName("seatsSpinBox")  self.gridlayout1.addWidget(self.seatsSpinBox, 1, 1, 1, 1)  self.stackedWidget.addWidget(self.page_2)  self.page = QtWidgets.QWidget()  self.page.setObjectName("page")  self.gridlayout2 = QtWidgets.QGridLayout(self.page)  self.gridlayout2.setContentsMargins(9, 9, 9, 9)  self.gridlayout2.setSpacing(6)  self.gridlayout2.setObjectName("gridlayout2")  self.weightSpinBox = QtWidgets.QSpinBox(self.page)  self.weightSpinBox.setAlignment(QtCore.Qt.AlignRight)  self.weightSpinBox.setMinimum(1)  self.weightSpinBox.setMaximum(8)  self.weightSpinBox.setObjectName("weightSpinBox")  self.gridlayout2.addWidget(self.weightSpinBox, 0, 1, 1, 1)  self.label_3 = QtWidgets.QLabel(self.page)  self.label_3.setObjectName("label_3")  self.gridlayout2.addWidget(self.label_3, 1, 0, 1, 1)  self.label_2 = QtWidgets.QLabel(self.page)  self.label_2.setObjectName("label_2")  self.gridlayout2.addWidget(self.label_2, 0, 0, 1, 1)  self.volumeSpinBox = QtWidgets.QSpinBox(self.page)  self.volumeSpinBox.setAlignment(QtCore.Qt.AlignRight)  self.volumeSpinBox.setMinimum(4)  self.volumeSpinBox.setMaximum(22)  self.volumeSpinBox.setProperty("value", 10)  self.volumeSpinBox.setObjectName("volumeSpinBox")  self.gridlayout2.addWidget(self.volumeSpinBox, 1, 1, 1, 1)  self.stackedWidget.addWidget(self.page)  self.gridlayout.addWidget(self.stackedWidget, 1, 0, 1, 1)  self.hboxlayout1 = QtWidgets.QHBoxLayout()  self.hboxlayout1.setContentsMargins(0, 0, 0, 0)  self.hboxlayout1.setSpacing(6)  self.hboxlayout1.setObjectName("hboxlayout1")  self.label = QtWidgets.QLabel(VehicleRentalDlg)  self.label.setObjectName("label")  self.hboxlayout1.addWidget(self.label)  self.vehicleComboBox = QtWidgets.QComboBox(VehicleRentalDlg)  self.vehicleComboBox.setObjectName("vehicleComboBox")  self.vehicleComboBox.addItem("")  self.vehicleComboBox.addItem("")  self.hboxlayout1.addWidget(self.vehicleComboBox)  self.gridlayout.addLayout(self.hboxlayout1, 0, 0, 1, 1)  self.label_4.setBuddy(self.colorComboBox)  self.label_5.setBuddy(self.seatsSpinBox)  self.label_3.setBuddy(self.volumeSpinBox)  self.label_2.setBuddy(self.seatsSpinBox)  self.label.setBuddy(self.vehicleComboBox)  self.retranslateUi(VehicleRentalDlg)  self.stackedWidget.setCurrentIndex(0)  self.vehicleComboBox.currentIndexChanged['int'].connect(self.stackedWidget.setCurrentIndex)  self.buttonBox.accepted.connect(VehicleRentalDlg.accept)  self.buttonBox.rejected.connect(VehicleRentalDlg.reject)  QtCore.QMetaObject.connectSlotsByName(VehicleRentalDlg) def retranslateUi(self, VehicleRentalDlg):  _translate = QtCore.QCoreApplication.translate  VehicleRentalDlg.setWindowTitle(_translate("VehicleRentalDlg", "Vehicle Rental"))  self.label_6.setText(_translate("VehicleRentalDlg", "Max. Mileage:"))  self.mileageLabel.setText(_translate("VehicleRentalDlg", "1000 miles"))  self.colorComboBox.setItemText(0, _translate("VehicleRentalDlg", "Black"))  self.colorComboBox.setItemText(1, _translate("VehicleRentalDlg", "Blue"))  self.colorComboBox.setItemText(2, _translate("VehicleRentalDlg", "Green"))  self.colorComboBox.setItemText(3, _translate("VehicleRentalDlg", "Red"))  self.colorComboBox.setItemText(4, _translate("VehicleRentalDlg", "Silver"))  self.colorComboBox.setItemText(5, _translate("VehicleRentalDlg", "White"))  self.colorComboBox.setItemText(6, _translate("VehicleRentalDlg", "Yellow"))  self.label_4.setText(_translate("VehicleRentalDlg", "Co&lor:"))  self.label_5.setText(_translate("VehicleRentalDlg", "&Seats:"))  self.weightSpinBox.setSuffix(_translate("VehicleRentalDlg", " tons"))  self.label_3.setText(_translate("VehicleRentalDlg", "Volu&me:"))  self.label_2.setText(_translate("VehicleRentalDlg", "&Weight:"))  self.volumeSpinBox.setSuffix(_translate("VehicleRentalDlg", " cu m"))  self.label.setText(_translate("VehicleRentalDlg", "&Vehicle Type:"))  self.vehicleComboBox.setItemText(0, _translate("VehicleRentalDlg", "Car"))  self.vehicleComboBox.setItemText(1, _translate("VehicleRentalDlg", "Van"))

# -*- coding: utf-8 -*-"""Module implementing VehicleRentalDlg."""import sysfrom PyQt5.QtCore import pyqtSlotfrom PyQt5.QtWidgets import QDialog,QApplicationfrom Ui_vehiclerentaldlg import Ui_VehicleRentalDlgclass VehicleRentalDlg(QDialog, Ui_VehicleRentalDlg): """ Class documentation goes here. """ def __init__(self, parent=None):  """  Constructor  @param parent reference to the parent widget  @type QWidget  """  super(VehicleRentalDlg, self).__init__(parent)  self.setupUi(self)  self.vehicleComboBox.setFocus() @pyqtSlot(int) def on_weightSpinBox_valueChanged(self, amount):  self.mileageLabel.setText("{0} miles".format(8000 / amount)) @pyqtSlot(str) def on_vehicleComboBox_currentIndexChanged(self, text):  if text == "Car":   self.mileageLabel.setText("1000 miles")  else:   self.on_weightSpinBox_valueChanged(     self.weightSpinBox.value()) if __name__ == "__main__": app = QApplication(sys.argv) form = VehicleRentalDlg()  form.show() app.exec_()