[PyQt] [Solved]Help Getting Started on Scene Swapping

[Axel_Erfurt]

This is an example to open mainWin on success

import sys
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QMainWindow, 
                                QLabel, QLineEdit, QGridLayout, QMessageBox)
from PyQt5.QtCore import Qt

class mainWin(QMainWindow):
    def __init__(self, parent = None):
        super(mainWin, self).__init__(parent)
        self.setGeometry(0, 0, 800, 600)
        self.lbl = QLabel(text = "Main Window", alignment = Qt.AlignCenter)
        self.setCentralWidget(self.lbl)
        self.setWindowTitle("Main Window")

class LoginForm(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('Login')
        self.setGeometry(0, 0, 800, 600)

        layout = QGridLayout()

        label_name = QLabel('Username:')
        self.lineEdit_username = QLineEdit("user")
        self.lineEdit_username.setPlaceholderText('Please enter your username')
        layout.addWidget(label_name, 0, 0)
        layout.addWidget(self.lineEdit_username, 0, 1)

        label_password = QLabel('Password:')
        self.lineEdit_password = QLineEdit("000")
        self.lineEdit_password.setPlaceholderText('Please enter your password')
        layout.addWidget(label_password, 1, 0)
        layout.addWidget(self.lineEdit_password, 1, 1)

        button_login = QPushButton('Login')
        button_login.clicked.connect(self.check_password)
        layout.addWidget(button_login, 2, 1, 1, 1)
        
        empty = QWidget()
        layout.addWidget(empty, 3, 1, 1, 1)

        self.setLayout(layout)

    def check_password(self):
        msg = QMessageBox()

        if self.lineEdit_username.text() == 'user' and self.lineEdit_password.text() == '000':
            self.win = mainWin()
            self.win.show()
            self.close()
        else:
            msg.setText('Incorrect Username or Password\ntry again')
            msg.exec_()
            return


if __name__ == '__main__':
    app = QApplication(sys.argv)

    form = LoginForm()
    form.show()

    sys.exit(app.exec_())