The file containing the code for my MQP's user interface for a cup cleaning system.

GUI.py

from guizero import App, Window, PushButton, TextBox, Text, Box
import tkinter
import sched, time


from ArduinoComm import Communication


def making_account():
    """
    Hides the possible preceding screens and shows the create account screen
    """
    welcome_screen_box.hide()
    login_screen_box.hide()
    new_account.show()


def return_to_window():
    """
    Returns the program to the welcome screen from account log in and create account screens
    """
    welcome_screen_box.show()
    new_account.hide()
    login_screen_box.hide()


def user_login():
    """
    Reveals the user login screen and hides the preceding welcome screen
    """
    welcome_screen_box.hide()
    login_screen_box.show()
    login_username.focus()


def check_credentials():
    """
    Checks the login credentials from the login screen
    """
    if login_username.value not in user_dict or user_dict[login_username.value] != login_password.value:
        invalid_credentials()
    else:
        valid_credentials()


def invalid_credentials(self):
    """
    Warns that the user has not entered valid login credentials
    """
    invalid_warning.show()
    login_username.focus()


def valid_credentials():
    """
    After a successful login attempt removes warnings, clears fields, and transitions to the home screen
    """
    invalid_warning.hide()
    login_screen_box.hide()
    create_account_button.hide()
    login_username.clear()
    login_password.clear()
    home_screen.show()


def dispense_cup():
    """
    Transitions from home screen to a user receiving a cup. Tells the second Arduino to make the magic happen
    """
    # try
    # catch
    # ard2.writeNumber(0)
    rc_confirmed_box.hide()
    home_screen.hide()
    got_my_cup.show()


def begin_return():
    """
    Transitions from home screen to a user returning a cup.
    """
    home_screen.hide()
    returned_cup_box.show()


def finish_return():
    """
    Tells the first Arduino to make the magic happen
    """
    returned_cup_box.hide()
    ard1.writeNumber(1)
    rc_confirmed_box.show()


def create_attempt():
    if new_username_text.value != "" and new_username_text.value not in user_dict:
        user_dict[new_username_text.value] = new_password_text.value
        has_account.hide()
        new_account.hide()
        user_login()
    else:
        has_account.show()


def thank_you_screen():
    got_my_cup.hide()
    rc_confirmed_box.hide()
    # deposited_cup.hide()
    thank_you.show()
    thank_you.after(5000, go_to_home, ())


def go_to_home():
    thank_you.hide()
    thank_you.cancel(go_to_home)
    welcome_screen_box.show()
    title_box.show()


user_dict = {
    "asdf": "asdf"
}

s = sched.scheduler(time.time, time.sleep)

ard1 = Communication(0x08)
# ard2 = Communication(0x02)




# region App Setup
app = app = App(title="")
app.bg = "#1B1A1A"  # light gray "#576574"  # magenta "#6F1E51"
app.text_size = "14"
app.text_color = "white"
app.font = "Arial"
app.full_screen = True
app_width = app.width
app_height = app.height

app_button_color = "#2C2C2B"  # dark gray"#222f3e"  # very berry"#B53471"
# endregion

# region To Create Account Screen
title_box = Box(app, width="fill", align="top")
create_account_button = PushButton(title_box, padx=5, pady=5, text="Create Account", command=making_account,
                                   align="left")
create_account_button.bg = app_button_color
create_account_button.text_size = 15
# endregion

# region Initial Welcome Screen
welcome_screen_box = Box(app, width="fill", align="top", height="fill")
header = Text(welcome_screen_box, text="Reusable Cup Machine")
header.text_size = create_account_button.text_size * 6
login = PushButton(welcome_screen_box, padx=35, pady=30, text="Login", command=user_login)
login.bg = app_button_color
login.text_size = create_account_button.text_size * 10
login.tk.pack(fill="none", expand=True)
# endregion

# region User Login Screen
login_screen_box = Box(app, width="fill", align="top")
login_title = Text(login_screen_box, text="Login Screen")
login_title.size = 40
# endregion

# region Invalid Login Attempt Warning
invalid_warning = Box(login_screen_box, width="fill")
invalid_text = Text(invalid_warning, text="Provided Credentials Could Not Be Determined to Be Authentic")
invalid_text.text_size = 9
try_again = Text(invalid_warning, text="Please Try Again")
try_again.text_size = 9
invalid_warning.text_color = "red"
invalid_warning.hide()
# endregion

# region Username and Password Input
username = Text(login_screen_box, text="Username:")
login_username = TextBox(login_screen_box)
login_username.text_color = "black"
login_username.bg = "white"
password = Text(login_screen_box, text="Password:")
login_password = TextBox(login_screen_box, hide_text=True)
login_password.text_color = "black"
login_password.bg = "white"

login_attempt_button = PushButton(login_screen_box, padx=35, pady=30, text="Next", command=check_credentials)
login_attempt_button.bg = app_button_color
login_screen_box.hide()
# endregion

# region Home Screen After Login
home_screen = Box(app, width="fill")
return_cup = PushButton(home_screen, text="Return Cup", command=begin_return)
return_cup.text_size = create_account_button.text_size * 5
return_cup.bg = app_button_color

get_cup = PushButton(home_screen, text="Get Cup", command=dispense_cup)
get_cup.text_size = return_cup.text_size
get_cup.bg = app_button_color
home_screen.hide()
# endregion

# region Create Account Screen
new_account = Box(app, width="fill")
has_account = Text(new_account, size=10, text="Username already exists!", color="red")
has_account.hide()
new_username = Text(new_account, size=10, text="Username:")
new_username_text = TextBox(new_account)
new_username_text.bg = "white"
new_username_text.text_color = "black"
new_password = Text(new_account, size=10, text="Password:")
new_password_text = TextBox(new_account, hide_text=True)
new_password_text.bg = "white"
new_password_text.text_color = "black"

na_sub_box = Box(new_account, layout="grid")
exit_create = PushButton(na_sub_box, text="Close", command=return_to_window, grid=[0, 0])
exit_create.bg = app_button_color
attempt_create = PushButton(na_sub_box, text="Create", align="left", grid=[1, 0], command=create_attempt)
attempt_create.bg = app_button_color
new_account.hide()
# endregion

# region Return Cup Starting Info
returned_cup_box = Box(app, width="fill")
rc_info_text = Text(returned_cup_box, size=36, text="Place Your Cup in the Ring", align="center")
rc_confirm_button = PushButton(returned_cup_box, text="Placed the Cup", command=finish_return, width=int(app_width / 3),
                               height=int(app_height / 3), align="center")
rc_confirm_button.text_size = login_title.text_size * 3
returned_cup_box.hide()
# endregion

# region Return Cup Confirmed Info
rc_confirmed_box = Box(app, width="fill")
rcc_info_text = Text(rc_confirmed_box, size=36, text="Would You Like To \n Get a New Cup?", align="center")
rcc_sidebyside = Box(rc_confirmed_box, layout="grid", align="center")
rcc_yes = PushButton(rcc_sidebyside, grid=[0, 0], text="Yes", command=dispense_cup, align="center")
rcc_no = PushButton(rcc_sidebyside, grid=[1, 0], text="No", command=thank_you_screen, align="center")
rc_confirmed_box.hide()
# endregion

# region Dispense Cup Info
got_my_cup = Box(app, width="fill")
dc_info_text = Text(got_my_cup, size=36, text="Retrieve Your Cup\nFrom Below", align="center")
dc_confirm_button = PushButton(got_my_cup, text="Got My Cup", command=thank_you_screen, width=int(app_width / 3),
                               height=int(app_height / 3), align="center")
dc_confirm_button.text_size = login_title.text_size * 3
got_my_cup.hide()
# endregion

# region Thank You
thank_you = Box(app, width="fill")
ty_text = PushButton(thank_you, width=app_width, height=app_height, text="Thank\nYou", command=go_to_home,
                     align="center")
ty_text.text_size = login_title.text_size * 5
ty_text.tk.config(highlightthickness=0)
thank_you.hide()
# endregion

app.display()