PyQt实现简单的计算器，pyqt计算器,#coding=utf-
#coding=utf-8from __future__ import divisionimport sysfrom PyQt4 import QtGui, QtCore########################################################################class Example(QtGui.QWidget): """""" #---------------------------------------------------------------------- def __init__(self): """Constructor""" super(Example, self).__init__() self.initUI() #---------------------------------------------------------------------- def initUI(self): """""" self.flag = 0 self.flag_equ = 0 self.flag_add = 0 #加 self.flag_sub = 0 #减 self.flag_mul = 0 #乘 self.flag_div = 0 #除 self.flag_flag = '' self.num_1 = '0' self.num_2 = '' self.num_3 = '' global lcd lcd = QtGui.QTextBrowser() lcd.setFixedHeight(190) lcd.setFont(QtGui.QFont("Microsoft YaHei", 20)) #lcd.setFixedWidth(100) lcd.setText('0'.decode('utf-8')) grid = QtGui.QGridLayout() self.setLayout(grid) #self.setMinimumSize(300, 300) #self.setMaximumSize(300, 300) #self.setGeometry( 200, 100, 200, 200 ) grid.setSpacing(0) grid.addWidget(lcd, 0, 0, 1, 4) button_1 = QtGui.QPushButton('1') button_2 = QtGui.QPushButton('2') button_3 = QtGui.QPushButton('3') button_4 = QtGui.QPushButton('4') button_5 = QtGui.QPushButton('5') button_6 = QtGui.QPushButton('6') button_7 = QtGui.QPushButton('7') button_8 = QtGui.QPushButton('8') button_9 = QtGui.QPushButton('9') button_0 = QtGui.QPushButton('0') button_dot = QtGui.QPushButton('.') button_equ = QtGui.QPushButton('=') button_div = QtGui.QPushButton('/') button_mul = QtGui.QPushButton('*') button_add = QtGui.QPushButton('+') button_sub = QtGui.QPushButton('-') button_cls = QtGui.QPushButton('cls') button_0.setFixedSize(50, 50) button_1.setFixedSize(50, 50) button_2.setFixedSize(50, 50) button_3.setFixedSize(50, 50) button_4.setFixedSize(50, 50) button_5.setFixedSize(50, 50) button_6.setFixedSize(50, 50) button_7.setFixedSize(50, 50) button_8.setFixedSize(50, 50) button_9.setFixedSize(50, 50) button_dot.setFixedSize(50, 50) button_equ.setFixedSize(200, 50) button_div.setFixedSize(50, 50) button_mul.setFixedSize(50, 50) button_add.setFixedSize(50, 50) button_sub.setFixedSize(50, 50) button_cls.setFixedSize(50, 50) button_0.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_1.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_2.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_3.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_4.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_5.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_6.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_7.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_8.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_9.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_dot.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_equ.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_div.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_mul.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_add.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_sub.setFont(QtGui.QFont("Microsoft YaHei", 16)) button_cls.setFont(QtGui.QFont("Microsoft YaHei", 16)) grid.addWidget(button_7, 1,0) grid.addWidget(button_8, 1,1) grid.addWidget(button_9, 1,2) grid.addWidget(button_div, 1,3) grid.addWidget(button_4, 2,0) grid.addWidget(button_5, 2,1) grid.addWidget(button_6, 2,2) grid.addWidget(button_mul, 2,3) grid.addWidget(button_1, 3,0) grid.addWidget(button_2, 3,1) grid.addWidget(button_3, 3,2) grid.addWidget(button_sub, 3,3) grid.addWidget(button_0, 4,0) grid.addWidget(button_dot, 4,1) grid.addWidget(button_cls, 4,2) grid.addWidget(button_add, 4,3) grid.addWidget(button_equ, 5, 0, 1, 4) self.move(300, 400) self.setWindowTitle('Calculator') grid.setSizeConstraint(QtGui.QLayout.SetFixedSize) self.show() self.connect(button_0,QtCore.SIGNAL('clicked()'),self.func_button_0) self.connect(button_1,QtCore.SIGNAL('clicked()'),self.func_button_1) self.connect(button_2,QtCore.SIGNAL('clicked()'),self.func_button_2) self.connect(button_3,QtCore.SIGNAL('clicked()'),self.func_button_3) self.connect(button_4,QtCore.SIGNAL('clicked()'),self.func_button_4) self.connect(button_5,QtCore.SIGNAL('clicked()'),self.func_button_5) self.connect(button_6,QtCore.SIGNAL('clicked()'),self.func_button_6) self.connect(button_7,QtCore.SIGNAL('clicked()'),self.func_button_7) self.connect(button_8,QtCore.SIGNAL('clicked()'),self.func_button_8) self.connect(button_9,QtCore.SIGNAL('clicked()'),self.func_button_9) self.connect(button_cls,QtCore.SIGNAL('clicked()'),self.func_button_cls) self.connect(button_dot,QtCore.SIGNAL('clicked()'),self.func_button_dot) self.connect(button_add,QtCore.SIGNAL('clicked()'),self.func_button_add) self.connect(button_sub,QtCore.SIGNAL('clicked()'),self.func_button_sub) self.connect(button_mul,QtCore.SIGNAL('clicked()'),self.func_button_mul) self.connect(button_div,QtCore.SIGNAL('clicked()'),self.func_button_div) self.connect(button_equ,QtCore.SIGNAL('clicked()'),self.func_button_equ) #---------------------------------------------------------------------- def keyPressEvent(self, event): """""" if event.key() == QtCore.Qt.Key_Escape: self.close() if event.key() == QtCore.Qt.Key_0: self.func_button_0() if event.key() == QtCore.Qt.Key_1: self.func_button_1() if event.key() == QtCore.Qt.Key_2: self.func_button_2() if event.key() == QtCore.Qt.Key_3: self.func_button_3() if event.key() == QtCore.Qt.Key_4: self.func_button_4() if event.key() == QtCore.Qt.Key_5: self.func_button_5() if event.key() == QtCore.Qt.Key_6: self.func_button_6() if event.key() == QtCore.Qt.Key_7: self.func_button_7() if event.key() == QtCore.Qt.Key_8: self.func_button_8() if event.key() == QtCore.Qt.Key_9: self.func_button_9() if event.key() == QtCore.Qt.Key_Period: self.func_button_dot() if event.key() == QtCore.Qt.Key_Enter: self.func_button_equ() if event.key() == QtCore.Qt.Key_Plus: self.func_button_add() if event.key() == QtCore.Qt.Key_Minus: self.func_button_sub() if event.key() == QtCore.Qt.Key_Asterisk: self.func_button_mul() if event.key() == QtCore.Qt.Key_Slash: self.func_button_div() if event.key() == QtCore.Qt.Key_C: self.func_button_cls() #---------------------------------------------------------------------- def func_button_0(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': #防止在QLineEdit里连续出现 0 ，比如 000.1 self.num_1 = '0' lcd.setText(self.num_1) else: self.num_1 = self.num_1+'0' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '0' else: self.num_2 = self.num_2+'0' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #Important:点击等号之后，除clear按键以外的按键都失效，用pass代替也可以，这里只是为了方便以后添加更多功能所以用了flag #---------------------------------------------------------------------- def func_button_1(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '1' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '1' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '1' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '1' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_2(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '2' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '2' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '2' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '2' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_3(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '3' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '3' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '3' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '3' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_4(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '4' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '4' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '4' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '4' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_5(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '5' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '5' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '3' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '5' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_6(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '6' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '6' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '6' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '6' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_7(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '7' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '7' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '7' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '7' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_8(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '8' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '8' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '8' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '8' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_9(self): """""" if self.flag_equ == 0: if self.flag == 0: if self.num_1 == '0': self.num_1 = '9' lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '9' lcd.setText(self.num_1) else: if self.num_2 == '0' or '': self.num_2 = '9' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '9' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_dot(self): """""" if self.flag_equ == 0: if self.flag == 0: if '.' not in self.num_1: if self.num_1 == '0': self.num_1 = '0.' print self.num_1 lcd.setText(self.num_1) else: self.num_1 = self.num_1 + '.' lcd.setText(self.num_1) else: if '.' not in self.num_2: if self.num_2 == '': self.num_2 = '0.' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.num_2 = self.num_2 + '.' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else : self.flag_equ =1 #---------------------------------------------------------------------- def func_button_cls(self): """""" self.num_1 = '0' self.num_2 = '' self.flag = 0 self.flag_equ = 0 self.flag_add = 0 self.flag_sub = 0 self.flag_mul = 0 self.flag_div = 0 lcd.setText(self.num_1) #---------------------------------------------------------------------- def func_button_add(self): """""" if self.flag == 0: self.flag = 1 self.flag_add = 1 self.flag_sub = 0 self.flag_mul = 0 self.flag_div = 0 self.flag_flag = '+' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: pass #---------------------------------------------------------------------- def func_button_sub(self): """""" if self.flag == 0: if self.num_1 == '0': self.num_1 = '-' lcd.setText(self.num_1) #elif self.num_2 == '': #self.num_2 = '-' #lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: self.flag = 1 self.flag_add = 0 self.flag_sub = 1 self.flag_mul = 0 self.flag_div = 0 self.flag_flag = '-' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: if self.num_2 == '': self.num_2 = '-' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) #---------------------------------------------------------------------- def func_button_mul(self): """""" if self.flag == 0: self.flag = 1 self.flag_add = 0 self.flag_sub = 0 self.flag_mul = 1 self.flag_div = 0 self.flag_flag = '*' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: pass #---------------------------------------------------------------------- def func_button_div(self): """""" if self.flag == 0: self.flag = 1 self.flag_add = 0 self.flag_sub = 0 self.flag_mul = 0 self.flag_div = 1 self.flag_flag = '/' lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2) else: pass #---------------------------------------------------------------------- def func_button_equ(self): """""" if self.flag == 1: if self.flag_flag == '+': if '.' in self.num_1: self.num_3 = str(float(self.num_1) + float(self.num_2)) if '.' not in self.num_1: if '.' not in self.num_2: self.num_3 = str(int(self.num_1) + int(self.num_2)) elif '.' in self.num_2: self.num_3 = str(float(self.num_1) + float(self.num_2)) else: self.num_3 = str(int(self.num_1) + int(self.num_2)) lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2 + '\n=\n' + self.num_3) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' elif self.flag_flag == '-': if '.' in self.num_1: self.num_3 = str(float(self.num_1) - float(self.num_2)) if '.' not in self.num_1: if '.' not in self.num_2: self.num_3 = str(int(self.num_1) - int(self.num_2)) elif '.' in self.num_2: self.num_3 = str(float(self.num_1) - float(self.num_2)) else: self.num_3 = str(int(self.num_1) - int(self.num_2)) lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2 + '\n=\n' + self.num_3) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' elif self.flag_flag == '*': if '.' in self.num_1: self.num_3 = str(float(self.num_1) * float(self.num_2)) if '.' not in self.num_1: if '.' not in self.num_2: self.num_3 = str(int(self.num_1) * int(self.num_2)) elif '.' in self.num_2: self.num_3 = str(float(self.num_1) * float(self.num_2)) else: self.num_3 = str(int(self.num_1) * int(self.num_2)) lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2 + '\n=\n' + self.num_3) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' elif self.flag_flag == '/': if self.num_2 == '0': lcd.setText("0不能作为除数！".decode('utf-8')) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' else: self.num_3 = float(self.num_1) / float(self.num_2) if (self.num_3 * 10) % 10 == 0: lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2 + '\n=\n' + str(int(self.num_3))) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' else: lcd.setText(self.num_1 + '\n' + self.flag_flag + '\n' + self.num_2 + '\n=\n' + str(float(self.num_3))) self.flag = 0 self.num_1 = '0' self.num_2 = '' self.num_3 = '' else: pass#----------------------------------------------------------------------def main(): """""" app = QtGui.QApplication(sys.argv) ex = Example() sys.exit(app.exec_())if __name__ == '__main__': main()
评论关闭