计算器-基于PySide2

import PySide2.QtCore from PySide2.QtUiTools import QUiLoader from PySide2.QtWidgets import QApplication, QTableWidgetItem class MainWindow(PySide2.QtCore.QObject): def __init__(self): super().__init__() # 加载ui self.ui = QUiLoader().load(r'./ui/calc.ui') self.ui.cb_switch.setChecked(False) self.ui.table.horizontalHeader().setSectionResizeMode(PySide2.QtWidgets.QHeaderView.Stretch) self.switch() # 定义三个变量，num是计算结果，method是运算符,if_method判断是否是计算结果，如果是，则点数字时重新输入，而不是在原有基础上向后加 self.num = 0 self.method = '' self.if_result = False # 操作 self.ui.b_1.clicked.connect(self.set_num) self.ui.b_1.clicked.connect(self.test) self.ui.b_2.clicked.connect(self.set_num) self.ui.b_3.clicked.connect(self.set_num) self.ui.b_4.clicked.connect(self.set_num) self.ui.b_5.clicked.connect(self.set_num) self.ui.b_6.clicked.connect(self.set_num) self.ui.b_7.clicked.connect(self.set_num) self.ui.b_8.clicked.connect(self.set_num) self.ui.b_9.clicked.connect(self.set_num) self.ui.b_0.clicked.connect(self.set_num) self.ui.b_00.clicked.connect(self.set_num) self.ui.b_decimal.clicked.connect(self.set_num) self.ui.b_multiply.clicked.connect(self.set_method) self.ui.b_devide.clicked.connect(self.set_method) self.ui.b_add.clicked.connect(self.set_method) self.ui.b_subtract.clicked.connect(self.set_method) self.ui.b_calculate.clicked.connect(self.set_method) self.ui.b_ac.clicked.connect(self.my_init) self.ui.rb_black.clicked.connect(self.change_color) self.ui.rb_white.clicked.connect(self.change_color) self.ui.cb_switch.stateChanged.connect(self.switch) def test(self): print('test') def switch(self): if self.ui.cb_switch.isChecked(): self.ui.tab.setEnabled(True) self.ui.rb_black.setEnabled(True) self.ui.rb_white.setEnabled(True) else: self.ui.tab.setEnabled(False) self.ui.rb_black.setEnabled(False) self.ui.rb_white.setEnabled(False) def set_num(self): if self.if_result: self.ui.lcd.setText('') self.if_result = False source = self.sender().text() num = self.ui.lcd.text() + source self.ui.lcd.setText(num) def set_method(self): # 运算，并保存当前点按的运算符 this_num = float(self.ui.lcd.text()) # 读取当前屏幕值 num1_item = QTableWidgetItem(str(self.num)) # 这三个item是table的单元，用于向table填充内容 method_item = QTableWidgetItem(self.method) num2_item = QTableWidgetItem(str(this_num)) if self.method == '+': # 首先，根据上次点按运算符计算结果 self.num += this_num elif self.method == '-': self.num -= this_num elif self.method == '*': self.num *= this_num elif self.method == '/': self.num /= this_num elif self.method == '': # 如果是第一次运算，则把当前输入数字当成上次结果，并保存新按的运算符 self.num = this_num self.if_result = True # 表示当前显示为运算结果，点击数字时重新输入 self.method = self.sender().text() # 保存当前点按运算符 return result_item = QTableWidgetItem(str(self.num)) self.ui.table.setRowCount(self.ui.table.rowCount()+1) self.ui.table.setItem(self.ui.table.rowCount() - 1, 0, num1_item) self.ui.table.setItem(self.ui.table.rowCount() - 1, 1, method_item) self.ui.table.setItem(self.ui.table.rowCount() - 1, 2, num2_item) self.ui.table.setItem(self.ui.table.rowCount() - 1, 3, result_item) self.ui.lcd.setText(str(self.num)) # 显示运算结果 self.if_result = True # 表示当前显示为运算结果，点击数字时重新输入 self.method = self.sender().text() # 保存当前点按运算符 if self.method == '=': # 如果点的是等于号，则重置计算器，并在LCD显示当前运行结果。 this_num = self.num self.my_init() self.ui.lcd.setText(str(this_num)) def my_init(self): self.num = 0 self.method = '+' self.ui.lcd.setText('') def change_color(self): source = self.sender().objectName() if source == 'rb_black': self.ui.rb_black.setChecked(True) self.ui.rb_white.setChecked(False) self.ui.lcd.setStyleSheet(('font: 75 36pt "Times New Roman";color: rgb(255,255,255);background-color: rgb(0, 0, 0);')) else: self.ui.rb_white.setChecked(True) self.ui.rb_black.setChecked(False) self.ui.lcd.setStyleSheet(('font: 75 36pt "Times New Roman";color: rgb(0,0,0);background-color: rgb(255,255,255);')) if __name__ == '__main__': app = QApplication([]) main_ui = MainWindow() main_ui.ui.show() app.exec_()