class MainWindow(QWidget): # set up signals resetClicked = pyqtSignal() inputChanged = pyqtSignal() input_one = None def __init__(self, parent=None): super(MainWindow, self).__init__(parent) # -------------------------------------------------------- # main window self.setObjectName("Multiply") self.resize(400, 300) # label self.label = QLabel(self) self.label.setGeometry(QRect(20, 10, 250, 50)) self.label.setText("Multiply two numbers!") # self.label.show() # input frame self.input_frame = QFrame(self) self.input_frame.setGeometry(QRect(20, 60, 350, 130)) self.input_frame.setFrameShape(QFrame.StyledPanel) self.input_frame.setFrameShadow(QFrame.Raised) # set the layout of the frame self.verticalLayout = QVBoxLayout(self.input_frame) self.verticalLayout.setObjectName("verticalLayout") # first input self.input_one = QDoubleSpinBox(self.input_frame) self.input_one.setObjectName("input_one") self.input_one.setDecimals(4) self.input_one.setSingleStep(0.01) self.verticalLayout.addWidget(self.input_one) # second input self.input_two = QDoubleSpinBox(self.input_frame) self.input_two.setObjectName("input_two") self.input_two.setDecimals(4) self.input_two.setSingleStep(0.01) self.verticalLayout.addWidget(self.input_two) # LCD result self.result_lcd = QLCDNumber(self) self.result_lcd.setObjectName("result_lcd") self.result_lcd.setGeometry(QRect(20, 200, 350, 80)) self.result_lcd.setDigitCount(10) self.result_lcd.setSmallDecimalPoint(True) # Reset Button self.reset_button = QPushButton(self) self.reset_button.setGeometry(QRect(270, 10, 100, 30)) self.reset_button.setObjectName("reset_button") self.reset_button.setText("Reset") # -------------------------------------------------------- # connect slots self.reset_button.clicked.connect(self.onResetClick) self.input_one.valueChanged.connect(self.onInputChanged) self.input_two.valueChanged.connect(self.onInputChanged) # define slots def onResetClick(self): self.resetClicked.emit() def onInputChanged(self): self.inputChanged.emit() def setResult(self, value): self.result_lcd.display(value)