main.py

from kivy.app import App
from kivy.modules import inspector  # For inspection.
from kivy.core.window import Window  # For inspection.
from kivy.properties import NumericProperty


class OrderApp(App):
    total = NumericProperty(0)  # stores price in cents
    burgers = NumericProperty(0)  # number of burgers ordered
    fries = NumericProperty(0)  # number of fries ordered
    drinks = NumericProperty(0)  # number of drinks ordered

    def build(self):
        inspector.create_inspector(Window, self)  # For inspection (press control-e to toggle).

    def update_total(self):
        self.total = self.burgers * 500 + self.drinks * 300 + self.fries * 200
        self.total = self.total * 1.07  # Add in sales tax

    # Add or subtract a burger based on if the + or - button is selected
    def update_burgers(self):
        if self.root.ids.plus.state == 'down':
            self.burgers += 1
        elif self.burgers > 0 and self.root.ids.minus.state == 'down':
            self.burgers -= 1
        self.update_total()

    # Add or subtract a drink based on if the + or - button is selected
    def update_drinks(self):
        if self.root.ids.plus.state == 'down':
            self.drinks += 1
        elif self.drinks > 0 and self.root.ids.minus.state == 'down':
            self.drinks -= 1
        self.update_total()

    # Add or subtract an order of fries based on if the + or - button is selected
    def update_fries(self):
        if self.root.ids.plus.state == 'down':
            self.fries += 1
        elif self.fries > 0 and self.root.ids.minus.state == 'down':
            self.fries -= 1
        self.update_total()

    def checkout(self):  # prints the total to the console
        print(f'The user checked out with a total of ${self.total/100:.2f}')
        self.burgers = 0
        self.drinks = 0
        self.fries = 0
        self.total = 0
        print('test')


if __name__ == '__main__':
    app = OrderApp()
    app.run()