Mastering GUI Programming with Python

Creating the invoice application GUI

Get a fresh copy of our PyQt application template and call it invoice_maker.py. We'll begin our application by creating the GUI elements, and then develop the method that will actually build the document.

Start your script with a data entry form class, as follows:

class InvoiceForm(qtw.QWidget):    submitted = qtc.pyqtSignal(dict)    def __init__(self):        super().__init__()        self.setLayout(qtw.QFormLayout())        self.inputs = dict()        self.inputs['Customer Name'] = qtw.QLineEdit()        self.inputs['Customer Address'] = qtw.QPlainTextEdit()        self.inputs['Invoice Date'] = qtw.QDateEdit(            date=qtc.QDate.currentDate(), calendarPopup=True)        self.inputs['Days until Due'] = qtw.QSpinBox(            minimum=0, maximum=60, value=30) for label, ...