계산기 2022-07-09

#https://wikidocs.net/35485

import sys
from PyQt5.QtWidgets import (QApplication, QPushButton, QWidget, QGridLayout, QLineEdit,  QTextEdit, QVBoxLayout, QHBoxLayout)


class MyApp(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()
        self.X = 0
        self.te = 0
        self.A = 0

    def initUI(self):
        hbox = QHBoxLayout()
        self.y = QTextEdit()
        hbox.addWidget(self.y)
        self.y.setText('0')

        vbox = QVBoxLayout()
        self.x = QLineEdit()
        vbox.addWidget(self.x)
        self.x.setText('0')

        grid = QGridLayout()
        for i in range(4):
            for j in range(3):
                if i*3+j >= 10:
                    break
                btn = QPushButton(str(9-(i*3+j)))
                btn.setCheckable(False)
                btn.clicked.connect(self.onChanged)
                btn.toggle()

                grid.addWidget(btn, i, j)

        btn1 = QPushButton('+')
        btn1.setCheckable(False)
        btn1.clicked.connect(self.plus)
        btn1.toggle()
        grid.addWidget(btn1, 3, 1)

        btn2 = QPushButton('=')
        btn2.setCheckable(False)
        btn2.toggle()
        btn2.clicked.connect(self.equal)
        grid.addWidget(btn2, 3, 2)

        btn5 = QPushButton('C')
        btn5.setCheckable(False)
        btn5.toggle()
        btn5.clicked.connect(self.reset)
        grid.addWidget(btn5, 4, 0)

        vbox.addLayout(grid)

        hbox.addLayout(vbox)

        self.setLayout(hbox)

        self.setWindowTitle('QGridLayout')
        self.setGeometry(300, 300, 300, 200)
        self.show()

    def onChanged(self):
        btn = self.sender()
        txt = int(self.x.text())
        txt *= 10
        txt += int(btn.text())
        self.x.setText(str(txt))

    def plus(self):
        self.X = 1
        self.number = int(self.x.text())
        self.x.setText('0')

    def equal(self):
        num = int(self.x.text())
        if self.X == 1:
            self.x.setText(str(self.number + num))
            self.te = (str(self.number)+'+'+str(num)+'='+str(self.number + num))
        if A == 0:
            self.y.setText(self.te)
            A += 1
        else:
            # 원래 y값에서 새로 추가할 te의 값을 더한 것을 y에 넣음
        self.number = 0
        self.X = 0

    def reset(self):
        self.x.setText('0')
        self.number = 0


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyApp()
    sys.exit(app.exec_())