PyQt5是一个用于Python的GUI框架，它提供了一个简单易用的GUI工具包，可以用于创建各种类型的应用程序，包括计算器。下面是一个简单的计算器的实现，其中包括了一些难点和复杂的地方。
难点：
- 使用Qt的布局管理器来创建窗口和控件。
- 使用Qt的信号和槽机制来处理用户输入和响应事件。
- 使用Qt的文本编辑器来编写和显示用户输入的内容。
- 使用Qt的图形界面设计器来创建用户界面。
复杂的地方：
- 需要使用Qt的信号和槽机制来处理用户输入和响应事件。这需要对Qt的语法有一定的了解。
- 需要使用Qt的文本编辑器来编写和显示用户输入的内容。这需要对Qt的文本编辑器有一定的了解。
- 需要使用Qt的图形界面设计器来创建用户界面。这需要对Qt的图形界面设计器有一定的了解。
实现的效果和利弊：
- 实现简单易用，可以快速上手。
- 可以方便地进行用户输入和响应事件的处理。
- 可以方便地进行用户界面的创建和编辑。
- 可以方便地进行用户界面的布局和排版。
实现的效果：
- 可以方便地进行用户输入和响应事件的处理。
- 可以方便地进行用户界面的创建和编辑。
- 可以方便地进行用户界面的布局和排版。
- 可以方便地进行用户界面的美化和优化。
实现的利弊：
- 需要对Qt的语法有一定的了解。
- 需要对Qt的文本编辑器有一定的了解。
- 需要对Qt的图形界面设计器有一定的了解。
- 需要对Qt的信号和槽机制有一定的了解。
ui_calculator.py
# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(600, 800)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
MainWindow.setMinimumSize(QtCore.QSize(600, 800))
self.centralwidget = QtWidgets.QWidget(MainWindow)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.centralwidget.sizePolicy().hasHeightForWidth())
self.centralwidget.setSizePolicy(sizePolicy)
self.centralwidget.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.centralwidget.setLayoutDirection(QtCore.Qt.LeftToRight)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.centralwidget)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.menuButton = QtWidgets.QPushButton(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.menuButton.sizePolicy().hasHeightForWidth())
self.menuButton.setSizePolicy(sizePolicy)
self.menuButton.setMaximumSize(QtCore.QSize(16777215, 40))
self.menuButton.setObjectName("menuButton")
self.horizontalLayout_2.addWidget(self.menuButton)
self.modeLabel = QtWidgets.QLabel(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.modeLabel.sizePolicy().hasHeightForWidth())
self.modeLabel.setSizePolicy(sizePolicy)
self.modeLabel.setMaximumSize(QtCore.QSize(16777215, 40))
self.modeLabel.setObjectName("modeLabel")
self.horizontalLayout_2.addWidget(self.modeLabel)
self.topButton = QtWidgets.QPushButton(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.topButton.sizePolicy().hasHeightForWidth())
self.topButton.setSizePolicy(sizePolicy)
self.topButton.setMaximumSize(QtCore.QSize(16777215, 40))
self.topButton.setObjectName("topButton")
self.horizontalLayout_2.addWidget(self.topButton)
spacerItem = QtWidgets.QSpacerItem(16777215, 40, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout_2.addItem(spacerItem)
self.historyButton = QtWidgets.QPushButton(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.historyButton.sizePolicy().hasHeightForWidth())
self.historyButton.setSizePolicy(sizePolicy)
self.historyButton.setMaximumSize(QtCore.QSize(16777215, 40))
self.historyButton.setObjectName("historyButton")
self.horizontalLayout_2.addWidget(self.historyButton)
self.verticalLayout_2.addLayout(self.horizontalLayout_2)
self.calcModeView = QtWidgets.QStackedWidget(self.centralwidget)
self.calcModeView.setObjectName("calcModeView")
self.pageStd = QtWidgets.QWidget()
self.pageStd.setObjectName("pageStd")
self.verticalLayout = QtWidgets.QVBoxLayout(self.pageStd)
self.verticalLayout.setContentsMargins(0, 0, 0, 0)
self.verticalLayout.setSpacing(0)
self.verticalLayout.setObjectName("verticalLayout")
self.digitUpDisplay = QtWidgets.QLineEdit(self.pageStd)
self.digitUpDisplay.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.digitUpDisplay.setObjectName("digitUpDisplay")
self.verticalLayout.addWidget(self.digitUpDisplay)
self.digitDisplay = QtWidgets.QLineEdit(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.digitDisplay.sizePolicy().hasHeightForWidth())
self.digitDisplay.setSizePolicy(sizePolicy)
self.digitDisplay.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.digitDisplay.setObjectName("digitDisplay")
self.verticalLayout.addWidget(self.digitDisplay)
self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
self.horizontalLayout_3.setSizeConstraint(QtWidgets.QLayout.SetMinimumSize)
self.horizontalLayout_3.setContentsMargins(0, 9, -1, -1)
self.horizontalLayout_3.setSpacing(0)
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.mcButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mcButton.sizePolicy().hasHeightForWidth())
self.mcButton.setSizePolicy(sizePolicy)
self.mcButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.mcButton.setFlat(True)
self.mcButton.setObjectName("mcButton")
self.horizontalLayout_3.addWidget(self.mcButton)
self.mrButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mrButton.sizePolicy().hasHeightForWidth())
self.mrButton.setSizePolicy(sizePolicy)
self.mrButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.mrButton.setFlat(True)
self.mrButton.setObjectName("mrButton")
self.horizontalLayout_3.addWidget(self.mrButton)
self.maddButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.maddButton.sizePolicy().hasHeightForWidth())
self.maddButton.setSizePolicy(sizePolicy)
self.maddButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.maddButton.setFlat(True)
self.maddButton.setObjectName("maddButton")
self.horizontalLayout_3.addWidget(self.maddButton)
self.msubButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.msubButton.sizePolicy().hasHeightForWidth())
self.msubButton.setSizePolicy(sizePolicy)
self.msubButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.msubButton.setFlat(True)
self.msubButton.setObjectName("msubButton")
self.horizontalLayout_3.addWidget(self.msubButton)
self.msButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.msButton.sizePolicy().hasHeightForWidth())
self.msButton.setSizePolicy(sizePolicy)
self.msButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.msButton.setFlat(True)
self.msButton.setObjectName("msButton")
self.horizontalLayout_3.addWidget(self.msButton)
self.mlistButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mlistButton.sizePolicy().hasHeightForWidth())
self.mlistButton.setSizePolicy(sizePolicy)
self.mlistButton.setMaximumSize(QtCore.QSize(16777215, 16777215))
self.mlistButton.setFlat(True)
self.mlistButton.setObjectName("mlistButton")
self.horizontalLayout_3.addWidget(self.mlistButton)
self.verticalLayout.addLayout(self.horizontalLayout_3)
self.gridLayout_2 = QtWidgets.QGridLayout()
self.gridLayout_2.setObjectName("gridLayout_2")
self.ceButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.ceButton.sizePolicy().hasHeightForWidth())
self.ceButton.setSizePolicy(sizePolicy)
self.ceButton.setObjectName("ceButton")
self.gridLayout_2.addWidget(self.ceButton, 0, 1, 1, 1)
self.fiveButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.fiveButton.sizePolicy().hasHeightForWidth())
self.fiveButton.setSizePolicy(sizePolicy)
self.fiveButton.setObjectName("fiveButton")
self.gridLayout_2.addWidget(self.fiveButton, 3, 1, 1, 1)
self.eightButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.eightButton.sizePolicy().hasHeightForWidth())
self.eightButton.setSizePolicy(sizePolicy)
self.eightButton.setObjectName("eightButton")
self.gridLayout_2.addWidget(self.eightButton, 2, 1, 1, 1)
self.percentButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.percentButton.sizePolicy().hasHeightForWidth())
self.percentButton.setSizePolicy(sizePolicy)
self.percentButton.setObjectName("percentButton")
self.gridLayout_2.addWidget(self.percentButton, 0, 0, 1, 1)
self.sevenButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.sevenButton.sizePolicy().hasHeightForWidth())
self.sevenButton.setSizePolicy(sizePolicy)
self.sevenButton.setObjectName("sevenButton")
self.gridLayout_2.addWidget(self.sevenButton, 2, 0, 1, 1)
self.sixButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.sixButton.sizePolicy().hasHeightForWidth())
self.sixButton.setSizePolicy(sizePolicy)
self.sixButton.setObjectName("sixButton")
self.gridLayout_2.addWidget(self.sixButton, 3, 2, 1, 1)
self.delButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.delButton.sizePolicy().hasHeightForWidth())
self.delButton.setSizePolicy(sizePolicy)
self.delButton.setObjectName("delButton")
self.gridLayout_2.addWidget(self.delButton, 0, 3, 1, 1)
self.divButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.divButton.sizePolicy().hasHeightForWidth())
self.divButton.setSizePolicy(sizePolicy)
self.divButton.setObjectName("divButton")
self.gridLayout_2.addWidget(self.divButton, 1, 3, 1, 1)
self.equalButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.equalButton.sizePolicy().hasHeightForWidth())
self.equalButton.setSizePolicy(sizePolicy)
self.equalButton.setObjectName("equalButton")
self.gridLayout_2.addWidget(self.equalButton, 5, 3, 1, 1)
self.subButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.subButton.sizePolicy().hasHeightForWidth())
self.subButton.setSizePolicy(sizePolicy)
self.subButton.setObjectName("subButton")
self.gridLayout_2.addWidget(self.subButton, 3, 3, 1, 1)
self.invButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.invButton.sizePolicy().hasHeightForWidth())
self.invButton.setSizePolicy(sizePolicy)
self.invButton.setObjectName("invButton")
self.gridLayout_2.addWidget(self.invButton, 1, 0, 1, 1)
self.dotButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.dotButton.sizePolicy().hasHeightForWidth())
self.dotButton.setSizePolicy(sizePolicy)
self.dotButton.setObjectName("dotButton")
self.gridLayout_2.addWidget(self.dotButton, 5, 2, 1, 1)
self.twoButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.twoButton.sizePolicy().hasHeightForWidth())
self.twoButton.setSizePolicy(sizePolicy)
self.twoButton.setObjectName("twoButton")
self.gridLayout_2.addWidget(self.twoButton, 4, 1, 1, 1)
self.threeButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.threeButton.sizePolicy().hasHeightForWidth())
self.threeButton.setSizePolicy(sizePolicy)
self.threeButton.setObjectName("threeButton")
self.gridLayout_2.addWidget(self.threeButton, 4, 2, 1, 1)
self.mulButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mulButton.sizePolicy().hasHeightForWidth())
self.mulButton.setSizePolicy(sizePolicy)
self.mulButton.setObjectName("mulButton")
self.gridLayout_2.addWidget(self.mulButton, 2, 3, 1, 1)
self.squareButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.squareButton.sizePolicy().hasHeightForWidth())
self.squareButton.setSizePolicy(sizePolicy)
self.squareButton.setObjectName("squareButton")
self.gridLayout_2.addWidget(self.squareButton, 1, 1, 1, 1)
self.nineButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.nineButton.sizePolicy().hasHeightForWidth())
self.nineButton.setSizePolicy(sizePolicy)
self.nineButton.setObjectName("nineButton")
self.gridLayout_2.addWidget(self.nineButton, 2, 2, 1, 1)
self.sqrtButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.sqrtButton.sizePolicy().hasHeightForWidth())
self.sqrtButton.setSizePolicy(sizePolicy)
self.sqrtButton.setObjectName("sqrtButton")
self.gridLayout_2.addWidget(self.sqrtButton, 1, 2, 1, 1)
self.revButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.revButton.sizePolicy().hasHeightForWidth())
self.revButton.setSizePolicy(sizePolicy)
self.revButton.setObjectName("revButton")
self.gridLayout_2.addWidget(self.revButton, 5, 0, 1, 1)
self.cButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.cButton.sizePolicy().hasHeightForWidth())
self.cButton.setSizePolicy(sizePolicy)
self.cButton.setObjectName("cButton")
self.gridLayout_2.addWidget(self.cButton, 0, 2, 1, 1)
self.zeroButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.zeroButton.sizePolicy().hasHeightForWidth())
self.zeroButton.setSizePolicy(sizePolicy)
self.zeroButton.setObjectName("zeroButton")
self.gridLayout_2.addWidget(self.zeroButton, 5, 1, 1, 1)
self.oneButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.oneButton.sizePolicy().hasHeightForWidth())
self.oneButton.setSizePolicy(sizePolicy)
self.oneButton.setObjectName("oneButton")
self.gridLayout_2.addWidget(self.oneButton, 4, 0, 1, 1)
self.fourButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.fourButton.sizePolicy().hasHeightForWidth())
self.fourButton.setSizePolicy(sizePolicy)
self.fourButton.setObjectName("fourButton")
self.gridLayout_2.addWidget(self.fourButton, 3, 0, 1, 1)
self.addButton = QtWidgets.QPushButton(self.pageStd)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.addButton.sizePolicy().hasHeightForWidth())
self.addButton.setSizePolicy(sizePolicy)
self.addButton.setObjectName("addButton")
self.gridLayout_2.addWidget(self.addButton, 4, 3, 1, 1)
self.verticalLayout.addLayout(self.gridLayout_2)
self.verticalLayout.setStretch(1, 2)
self.verticalLayout.setStretch(2, 1)
self.verticalLayout.setStretch(3, 9)
self.calcModeView.addWidget(self.pageStd)
self.pageProg = QtWidgets.QWidget()
self.pageProg.setObjectName("pageProg")
self.calcModeView.addWidget(self.pageProg)
self.verticalLayout_2.addWidget(self.calcModeView)
self.verticalLayout_2.setStretch(0, 1)
self.verticalLayout_2.setStretch(1, 12)
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
self.calcModeView.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "模拟计算器"))
self.menuButton.setText(_translate("MainWindow", "菜单栏"))
self.modeLabel.setText(_translate("MainWindow", "标准"))
self.topButton.setText(_translate("MainWindow", "置顶"))
self.historyButton.setText(_translate("MainWindow", "历史记录"))
self.digitDisplay.setText(_translate("MainWindow", "0"))
self.mcButton.setText(_translate("MainWindow", "MC"))
self.mrButton.setText(_translate("MainWindow", "MR"))
self.maddButton.setText(_translate("MainWindow", "M+"))
self.msubButton.setText(_translate("MainWindow", "M-"))
self.msButton.setText(_translate("MainWindow", "MS"))
self.mlistButton.setText(_translate("MainWindow", "Mlist"))
self.ceButton.setText(_translate("MainWindow", "CE"))
self.fiveButton.setText(_translate("MainWindow", "5"))
self.eightButton.setText(_translate("MainWindow", "8"))
self.percentButton.setText(_translate("MainWindow", "%"))
self.sevenButton.setText(_translate("MainWindow", "7"))
self.sixButton.setText(_translate("MainWindow", "6"))
self.delButton.setText(_translate("MainWindow", "del"))
self.divButton.setText(_translate("MainWindow", "/"))
self.equalButton.setText(_translate("MainWindow", "="))
self.subButton.setText(_translate("MainWindow", "-"))
self.invButton.setText(_translate("MainWindow", "1/x"))
self.dotButton.setText(_translate("MainWindow", "."))
self.twoButton.setText(_translate("MainWindow", "2"))
self.threeButton.setText(_translate("MainWindow", "3"))
self.mulButton.setText(_translate("MainWindow", "*"))
self.squareButton.setText(_translate("MainWindow", "x^2"))
self.nineButton.setText(_translate("MainWindow", "9"))
self.sqrtButton.setText(_translate("MainWindow", "sqrt(x)"))
self.revButton.setText(_translate("MainWindow", "+/-"))
self.cButton.setText(_translate("MainWindow", "C"))
self.zeroButton.setText(_translate("MainWindow", "0"))
self.oneButton.setText(_translate("MainWindow", "1"))
self.fourButton.setText(_translate("MainWindow", "4"))
self.addButton.setText(_translate("MainWindow", "+"))
calcMain.py
from PyQt5 import QtWidgets
from ui_calculator import Ui_MainWindow
from enum import Enum
import operator, math
import sys
OPERATOR_DICT = {operator.add: '+', operator.sub: '-', operator.mul: '*', operator.truediv: '/'}
def stripZerosForInt(num_str):
if '.' in num_str:
num_str = num_str.rstrip('0').rstrip('.')
return num_str
class status(Enum):
INPUT_NUM1 = 1
SET_OPERATOR = 2
INPUT_NUM2 = 3
CALCULATED = 4
class calcMainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
#### init UI ####
QtWidgets.QMainWindow.__init__(self)
self.setupUi(self)
'''
Digit Display
'''
#### digit button ####
self.status = status.INPUT_NUM1
self.__newDigitFlag = True
self.__newCalculation = False
self.__num1 = None
self.__num2 = None
self.zeroButton.clicked.connect(lambda : self.inputDigit(0))
self.oneButton.clicked.connect(lambda : self.inputDigit(1))
self.twoButton.clicked.connect(lambda : self.inputDigit(2))
self.threeButton.clicked.connect(lambda : self.inputDigit(3))
self.fourButton.clicked.connect(lambda : self.inputDigit(4))
self.fiveButton.clicked.connect(lambda : self.inputDigit(5))
self.sixButton.clicked.connect(lambda : self.inputDigit(6))
self.sevenButton.clicked.connect(lambda : self.inputDigit(7))
self.eightButton.clicked.connect(lambda : self.inputDigit(8))
self.nineButton.clicked.connect(lambda : self.inputDigit(9))
### dot button ###
self.dotButton.clicked.connect(self.setDotInDigits)
### +/- sign button ###
self.revButton.clicked.connect(self.setReverseSign)
'''
Basic Calculation function (+, -, *, /)
'''
self._operator = None # default use add function
self.addButton.clicked.connect(lambda : self.setOperator(operator.add))
self.subButton.clicked.connect(lambda : self.setOperator(operator.sub))
self.mulButton.clicked.connect(lambda : self.setOperator(operator.mul))
self.divButton.clicked.connect(lambda : self.setOperator(operator.truediv))
self.equalButton.clicked.connect(self.equalFunc)
'''
Advance Calculation function (1/x, sqrt, x^2)
'''
self.invButton.clicked.connect(self.invFunc)
self.squareButton.clicked.connect(self.squareFunc)
self.sqrtButton.clicked.connect(self.sqrtFunc)
'''
Special Function Keys (%, CE, C, DEL)
'''
self.percentButton.clicked.connect(self.percentageFunc)
self.ceButton.clicked.connect(self.ceFunc)
self.cButton.clicked.connect(self.cFunc)
self.delButton.clicked.connect(self.delFunc)
'''
Memory Function Keys (MC, MR, M+, M-, MS, Mlist)
'''
self.mcButton.setEnabled(False)
self.mrButton.setEnabled(False)
self.mlistButton.setEnabled(False)
self.__memory = None
self.mcButton.clicked.connect(self.mcFunc)
self.mrButton.clicked.connect(self.mrFunc)
self.maddButton.clicked.connect(self.maddFunc)
self.msubButton.clicked.connect(self.msubFunc)
self.msButton.clicked.connect(self.msFunc)
self.mlistButton.clicked.connect(self.mlistFunc)
#### SLOT functions ####
### Digits ###
def inputDigit(self, digit):
digit = str(digit)
if self.status == status.INPUT_NUM1:
if self.__newDigitFlag:
self.digitDisplay.setText(str(digit))
self.__newDigitFlag = False
else:
if self.digitDisplay.text()!='0':
self.digitDisplay.setText(self.digitDisplay.text()+digit)
elif self.digitDisplay.text()=='0' and digit!='0':
self.digitDisplay.setText(digit)
else:
pass
self.__num1 = float(self.digitDisplay.text())
elif self.status == status.SET_OPERATOR:
self.__newDigitFlag = True
self.status = status.INPUT_NUM2
self.inputDigit(digit)
elif self.status == status.INPUT_NUM2:
if self.__newDigitFlag:
self.digitDisplay.setText(str(digit))
self.__newDigitFlag = False
else:
if self.digitDisplay.text()!='0':
self.digitDisplay.setText(self.digitDisplay.text()+digit)
elif self.digitDisplay.text()=='0' and digit!='0':
self.digitDisplay.setText(digit)
else:
pass
self.__num2 = float(self.digitDisplay.text())
elif self.status == status.CALCULATED:
self.__newDigitFlag = True
self.status = status.INPUT_NUM1
self.inputDigit(digit)
else:
raise Exception('Unhandled status!')
def setDotInDigits(self):
if self.__newDigitFlag:
self.digitDisplay.setText('0.')
else:
if '.' not in self.digitDisplay.text():
self.digitDisplay.setText(self.digitDisplay.text()+'.')
self.__newDigitFlag = False
def setReverseSign(self):
# if not self.__newDigitFlag:
if self.digitDisplay.text()=='0':
return
num_str = self.digitDisplay.text()
if num_str.startswith('-'):
self.digitDisplay.setText(self.digitDisplay.text().lstrip('-'))
else:
self.digitDisplay.setText('-'+self.digitDisplay.text())
if self.status in (status.INPUT_NUM1, status.CALCULATED):
self.digitUpDisplay.setText('negate({})'.format(stripZerosForInt(num_str)))
self.__num1 = -self.__num1
elif self.status in (status.INPUT_NUM2, status.SET_OPERATOR):
if self.status == status.SET_OPERATOR:
self.__num2 = float(num_str)
self.status = status.INPUT_NUM2
self.__num2 = -self.__num2
else:
raise Exception('Unhandled status!')
### Basic Calculation Functions ###
def setOperator(self, _operator):
print(self.status, self.__num1, self.__num2)
self.__newDigitFlag = True
if self.status == status.INPUT_NUM1:
self._operator = _operator
self.status = status.SET_OPERATOR
elif self.status == status.SET_OPERATOR:
self._operator = _operator
elif self.status == status.INPUT_NUM2:
result = self._operator(self.__num1, self.__num2)
self._operator = _operator
self.status = status.SET_OPERATOR
self.__num1 = result
self.digitDisplay.setText(stripZerosForInt(str(result)))
elif self.status == status.CALCULATED:
self._operator = _operator
self.status = status.SET_OPERATOR
else:
raise Exception('Unhandled status!')
self.digitUpDisplay.setText(self.digitDisplay.text()+' '+OPERATOR_DICT[self._operator])
def equalFunc(self):
print(self.status, self.__num1, self.__num2)
self.__newDigitFlag = True
if self.status == status.INPUT_NUM1:
if self._operator is None:
self.digitUpDisplay.setText(stripZerosForInt(self.digitDisplay.text())+' =')
self.status = status.CALCULATED
return
else:
result = self._operator(self.__num1, self.__num2)
elif self.status == status.SET_OPERATOR:
self.__num2 = self.__num1
result = self._operator(self.__num1, self.__num2)
elif self.status == status.INPUT_NUM2:
result = self._operator(self.__num1, self.__num2)
elif self.status ==status.CALCULATED:
result = self._operator(self.__num1, self.__num2)
else:
raise Exception('Unhandled status!')
self.digitUpDisplay.setText(stripZerosForInt(str(self.__num1))+' '+OPERATOR_DICT[self._operator]+' '+ stripZerosForInt(str(self.__num2)) +' =')
self.digitDisplay.setText(stripZerosForInt(str(result)))
self.__num1 = result
self.status = status.CALCULATED
### Advance Calculation Functions ###
def invFunc(self):
# inverse the number: 1/x
__num = float(self.digitDisplay.text())
if __num == 0:
self.digitDisplay.setText("Error! Zero on denominator!")
return
res = 1/__num
num_str = self.digitDisplay.text()
if self.status in (status.INPUT_NUM1, status.CALCULATED):
self.digitUpDisplay.setText('1/{}'.format(stripZerosForInt(num_str)))
self.__num1 = res
elif self.status in (status.INPUT_NUM2, status.SET_OPERATOR):
if self.status == status.SET_OPERATOR:
self.__num2 = float(num_str)
self.status = status.INPUT_NUM2
self.__num2 = res
else:
raise Exception('Unhandled status!')
self.digitDisplay.setText(str(res))
self.__newDigitFlag = True
def squareFunc(self):
# x^2
__num = float(self.digitDisplay.text())
res = __num**2
num_str = self.digitDisplay.text()
if self.status in (status.INPUT_NUM1, status.CALCULATED):
print(num_str)
self.digitUpDisplay.setText('sqr({})'.format(stripZerosForInt(num_str)))
self.__num1 = res
elif self.status in (status.INPUT_NUM2, status.SET_OPERATOR):
if self.status == status.SET_OPERATOR:
self.__num2 = float(num_str)
self.status = status.INPUT_NUM2
self.__num2 = res
else:
raise Exception('Unhandled status!')
self.digitDisplay.setText(str(res))
self.__newDigitFlag = True
def sqrtFunc(self):
# sqrt(x)
__num = float(self.digitDisplay.text())
res = math.sqrt(__num)
num_str = self.digitDisplay.text()
if self.status in (status.INPUT_NUM1, status.CALCULATED):
self.digitUpDisplay.setText('sqrt({})'.format(stripZerosForInt(num_str)))
self.__num1 = res
elif self.status in (status.INPUT_NUM2, status.SET_OPERATOR):
if self.status == status.SET_OPERATOR:
self.__num2 = float(num_str)
self.status = status.INPUT_NUM2
self.__num2 = res
else:
raise Exception('Unhandled status!')
self.digitDisplay.setText(str(res))
self.__newDigitFlag = True
### Special function keys ###
def percentageFunc(self):
pass
def ceFunc(self):
# if pressed during digits input, clear all the edit digits
# if pressed after calculation, clear all
self.digitDisplay.setText("0")
if self.__newDigitFlag:
self.digitUpDisplay.setText("")
def cFunc(self):
# set all clear
self.digitUpDisplay.setText("")
self.digitDisplay.setText("0")
self.__num1 = 0
self.__num2 = None
self._operator = None
self.__newDigitFlag = True
self.status = status.INPUT_NUM1
def delFunc(self):
# if del during digits input, delete the last digit
# if del after calculation, clear calculation display (self.digitUpDisplay)
if not self.__newDigitFlag:
currentStr = self.digitDisplay.text()
if len(currentStr)>1:
newStr = currentStr[:-1]
else:
newStr = "0"
self.digitDisplay.setText(newStr)
else:
self.digitUpDisplay.setText("")
### Memory function keys ###
def mcFunc(self):
# clear memory
self.__memory = None
self.mcButton.setEnabled(False)
self.mrButton.setEnabled(False)
self.mlistButton.setEnabled(False)
self.__newDigitFlag = True
def mrFunc(self):
# recall memory
self.digitDisplay.setText(str(self.__memory))
self.__newDigitFlag = True
if self.status in (status.INPUT_NUM2, status.SET_OPERATOR):
if self.status == status.SET_OPERATOR:
self.status = status.INPUT_NUM2
self.__num2 = self.__memory
elif self.status in (status.INPUT_NUM1, status.CALCULATED):
if self.status == status.CALCULATED:
self.status = status.INPUT_NUM1
self.__num1 = self.__memory
else:
raise Exception('Unhandled status')
def maddFunc(self):
# add to memroy
if self.__memory is None:
self.mcButton.setEnabled(True)
self.mrButton.setEnabled(True)
self.mlistButton.setEnabled(True)
self.__memory = 0
_num = float(self.digitDisplay.text())
self.__memory += _num
self.__newDigitFlag = True
def msubFunc(self):
# substract to memroy
if self.__memory is None:
self.mcButton.setEnabled(True)
self.mrButton.setEnabled(True)
self.mlistButton.setEnabled(True)
self.__memory = 0
_num = float(self.digitDisplay.text())
self.__memory -= _num
self.__newDigitFlag = True
def msFunc(self):
# save memory
if self.__memory is None:
self.mcButton.setEnabled(True)
self.mrButton.setEnabled(True)
self.mlistButton.setEnabled(True)
self.__memory = 0
_num = float(self.digitDisplay.text())
self.__memory = _num
self.__newDigitFlag = True
def mlistFunc(self):
pass
if __name__ == '__main__':
# launch the window
app = QtWidgets.QApplication(sys.argv)
win = calcMainWindow()
win.show()
sys.exit(app.exec_())