from PyQt4 import QtCore, QtGuiclass MainWindow(QtGui.QMainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent) self.central_widget = QtGui.QStackedWidget() self.setCentralWidget(self.central_widget) login_widget = LoginWidget(self) login_widget.button.clicked.connect(self.login) self.central_widget.addWidget(login_widget) def login(self): logged_in_widget = LoggedWidget(self) self.central_widget.addWidget(logged_in_widget) self.central_widget.setCurrentWidget(logged_in_widget)class LoginWidget(QtGui.QWidget): def __init__(self, parent=None): super(LoginWidget, self).__init__(parent) layout = QtGui.QHBoxLayout() self.button = QtGui.QPushButton('Login') layout.addWidget(self.button) self.setLayout(layout) # you might want to do self.button.click.connect(self.parent().login) hereclass LoggedWidget(QtGui.QWidget): def __init__(self, parent=None): super(LoggedWidget, self).__init__(parent) layout = QtGui.QHBoxLayout() self.label = QtGui.QLabel('logged in!') layout.addWidget(self.label) self.setLayout(layout)if __name__ == '__main__': app = QtGui.QApplication([]) window = MainWindow() window.show() app.exec_()
