在Python桌面应用程序中使用什么架构模式

编辑：

我试着在一个测试对象中应用mvc模式，就像我的主管建议的那样。。。这是我的代码：

视图类（由pyuic5命令生成）：

from PyQt5 import QtWidgets, QtCore, QtGui from datetime import * import sys class Ui_Dialog(QtWidgets.QDialog): def __init__(self): super().__init__() self.setupUi(self) def setupUi(self, Dialog): Dialog.setObjectName("Dialog") Dialog.resize(400, 200) self.vLayout = QtWidgets.QVBoxLayout(Dialog) self.vLayout.setObjectName("verticalLayout") self.widget = QtWidgets.QWidget(Dialog) self.widget.setGeometry(QtCore.QRect(15, 20, 366, 206)) self.widget.setObjectName("widget") self.gridLayout = QtWidgets.QGridLayout() self.gridLayout.setContentsMargins(0, 0, 0, 0) self.gridLayout.setObjectName("gridLayout") self.gridLayout.setRowMinimumHeight(0, 50) self.gridLayout.setRowMinimumHeight(1, 50) self.gridLayout.setRowMinimumHeight(2, 50) self.gridLayout.setRowMinimumHeight(3, 20) self.label = QtWidgets.QLabel(self.widget) self.label.setObjectName("label") self.gridLayout.addWidget(self.label, 0, 0, 1, 1) self.lineEdit = QtWidgets.QLineEdit(self.widget) self.lineEdit.setObjectName("lineEdit") self.lineEdit.setEnabled(False) self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 3) self.label_2 = QtWidgets.QLabel(self.widget) self.label_2.setObjectName("label_2") self.gridLayout.addWidget(self.label_2, 1, 0, 1, 1) self.lineEdit_2 = QtWidgets.QLineEdit(self.widget) self.lineEdit_2.setObjectName("lineEdit_2") self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 3) self.label_3 = QtWidgets.QLabel(self.widget) self.label_3.setFont(font) self.label_3.setObjectName("label_3") self.gridLayout.addWidget(self.label_3, 2, 0, 1, 1) self.lineEdit_3 = QtWidgets.QLineEdit(self.widget) self.lineEdit_3.setObjectName("lineEdit_3") self.gridLayout.addWidget(self.lineEdit_3, 2, 1, 1, 3) #Add PushButtons self.pbNext = QtWidgets.QPushButton(">", self) self.gridLayout.addWidget(self.pbNext, 3, 2) self.pbPrevious = QtWidgets.QPushButton("<", self) self.gridLayout.addWidget(self.pbPrevious, 3, 1) self.pbFirst = QtWidgets.QPushButton("<<", self) self.gridLayout.addWidget(self.pbFirst, 3, 0) self.pbLast = QtWidgets.QPushButton(">>", self) self.gridLayout.addWidget(self.pbLast, 3, 3) self.pbAdd = QtWidgets.QPushButton("+", self) self.gridLayout.addWidget(self.pbAdd, 0, 4) self.pbDelete = QtWidgets.QPushButton("x", self) self.gridLayout.addWidget(self.pbDelete, 1, 4) self.pbOpenId = QtWidgets.QPushButton("OpenId", self) self.gridLayout.addWidget(self.pbOpenId, 2, 4) self.pbQuit = QtWidgets.QPushButton("Quit", self) self.gridLayout.addWidget(self.pbQuit, 3, 4) self.vLayout.addLayout(self.gridLayout) self.retranslateUi(Dialog) QtCore.QMetaObject.connectSlotsByName(Dialog) def retranslateUi(self, Dialog): _translate = QtCore.QCoreApplication.translate Dialog.setWindowTitle(_translate("Dialog", "Test my dialog")) self.label.setText(_translate("Dialog", "Id")) self.label_2.setText(_translate("Dialog", "First name")) self.label_3.setText(_translate("Dialog", "Last name"))

模型类：

这是我的控制器：

import sys from PyQt5 import QtGui, QtCore, QtWidgets, QtSql import View import Model FIRST, LAST, PREVIOUS, NEXT = range(4) class Controller(QtWidgets.QDialog): def __init__(self, parent = None): super().__init__(parent) self.myDlg = View.Ui_Dialog() self.connectButtons() self.dbModel = Model.DBModel("mydb", "localhost", "root", "", "person") # create a model that reads from "Person" table in db "MyDB" self.tblRowCount = self.dbModel.modelRowCount self.modelRowCount = self.dbModel.getModelRowCount() # map the dlg fields to the db fields self.mapper = QtWidgets.QDataWidgetMapper(self) self.mapper.setSubmitPolicy(QtWidgets.QDataWidgetMapper.ManualSubmit) self.mapper.setModel(self.dbModel.model) self.mapper.addMapping(self.myDlg.lineEdit, 0) self.mapper.addMapping(self.myDlg.lineEdit_2, 1) self.mapper.addMapping(self.myDlg.lineEdit_3, 2) self.mapper.toFirst() self.setButtonsEnabled() def connectButtons(self): self.myDlg.pbNext.clicked.connect(lambda: self.navigate(NEXT)) self.myDlg.pbPrevious.clicked.connect(lambda: self.navigate(PREVIOUS)) self.myDlg.pbLast.clicked.connect(lambda: self.navigate(LAST)) self.myDlg.pbFirst.clicked.connect(lambda: self.navigate(FIRST)) self.myDlg.pbQuit.clicked.connect(self.quit) self.myDlg.pbAdd.clicked.connect(self.addRecord) self.myDlg.pbDelete.clicked.connect(self.deleteRecord) self.myDlg.pbOpenId.clicked.connect(self.openId) def navigate(self, p_intDirection): intRow = self.mapper.currentIndex() self.mapper.submit() if p_intDirection == FIRST: intRow = 0 elif p_intDirection == LAST: intRow = self.dbModel.modelRowCount - 1 elif p_intDirection == NEXT: intRow += 1 elif p_intDirection == PREVIOUS: intRow -= 1 self.mapper.setCurrentIndex(intRow) self.setButtonsEnabled() def setButtonsEnabled(self): intCurrentIndex = self.mapper.currentIndex() if self.modelRowCount == 1: self.myDlg.pbPrevious.setEnabled(False) self.myDlg.pbNext.setEnabled(False) self.myDlg.pbLast.setEnabled(False) self.myDlg.pbFirst.setEnabled(False) if intCurrentIndex == 0: self.myDlg.pbPrevious.setEnabled(False) self.myDlg.pbNext.setEnabled(True) self.myDlg.pbLast.setEnabled(True) self.myDlg.pbFirst.setEnabled(False) elif intCurrentIndex == self.modelRowCount - 1: self.myDlg.pbPrevious.setEnabled(True) self.myDlg.pbNext.setEnabled(False) self.myDlg.pbLast.setEnabled(False) self.myDlg.pbFirst.setEnabled(True) else: self.myDlg.pbPrevious.setEnabled(True) self.myDlg.pbNext.setEnabled(True) self.myDlg.pbLast.setEnabled(True) self.myDlg.pbFirst.setEnabled(True) def quit(self): self.mapper.submit() QtWidgets.QDialog.accept(self.myDlg) def addRecord(self): self.mapper.submit() self.dbModel.insertRow() self.mapper.setCurrentIndex(self.modelRowCount + 1) self.modelRowCount += 1 self.myDlg.lineEdit.setText(str(self.modelRowCount + 1)) self.myDlg.lineEdit_2.setText("") self.myDlg.lineEdit_3.setText("") self.setButtonsEnabled() self.myDlg.lineEdit_2.setFocus() self.dbModel.getMaxId() def deleteRecord(self): intCrntRow = self.mapper.currentIndex() if QtWidgets.QMessageBox.question(self, "Confirmation", """Are you sure you want to delete the person {0} {1} ?""".format(self.lineEdit_2.text(), self.lineEdit_3.text())) == QtWidgets.QMessageBox.No: return self.dbModel.deleteRowByIndex(intCrntRow) if intCrntRow - 1 < 0: intCrntRow += 1 else: intCrntRow -= 1 self.mapper.setCurrentIndex(intCrntRow) self.setButtonsEnabled() def openId(self): self.dbModel.getDataForId(7) self.mapper.toFirst()

重点是我读到视图应该有一个控制器的实例，这里没有，我看不到在这里做的意义。尤其是我不想更改pyuic命令生成的文件。在

我没有具体说明要使用什么模式，我在搜索，试图找到最流行的模式，可以应用于桌面应用程序与数据库，使用PyQt工具包。在

希望你能在这个话题上了解我。在

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