Tkinter - Questions

# http://stackoverflow.com/questions/34658585/python-tkinter-gui


from tkinter import *
import random

# -- functions ---

def sel():
    selection = "You selected the option " + str(var.get())
    message.set(selection)


def submit_btn ():
    global score

    btn_submit.config(state="disabled")

    if var.get() == all_questions[questions_order[current_question]]['correct_answer'] :
       score += 1
       points.set("Your score is: {}".format(str(score)))
    else:
       message.set("Sorry wrong answer")

    # change image
    badge.config(image=photo2)

    # show image (if it was hidden)
    #badge.pack(before=points_label)


def next_btn():
    global current_question

    current_question += 1
    set_question(current_question)


# function used in two places - next_btn and to set first question
def set_question(number):

    if number < len(all_questions):
        # get question number from "random order" list
        number = questions_order[number]

        question.set(all_questions[number]['question'])
        answer1.set(all_questions[number]['answer1'])
        answer2.set(all_questions[number]['answer2'])
        answer3.set(all_questions[number]['answer3'])
        answer4.set(all_questions[number]['answer4'])

        # reset elements
        var.set(0)
        btn_submit.config(state="active")
        #badge.pack_forget() # hide image
        message.set("")
    else:
        #badge.pack_forget() # hide image
        message.set("It was last question")



def quit_btn():
    root.destroy()

# --- main ---

all_questions = [
  {
    'question': "Why is Pc better than Mac?",
    'answer1': "Easy to Use",
    'answer2': "Less Vulnerable to Viruses",
    'answer3': "Boot time is faster",
    'answer4': "Stable Operating System",
    'correct_answer': 1,
  },
  {
    'question': "Which of the following is a product of Mac?",
    'answer1': "Alien Ware",
    'answer2': "ZX-80 microcomputer",
    'answer3': "POWERBOOK 100",
    'answer4': "Commodore 64",
    'correct_answer': 3,
  },
  {
    'question': "What year was Mactonish introduced?",
    'answer1': "1984",
    'answer2': "1989",
    'answer3': "1993",
    'answer4': "1995",
    'correct_answer': 1,
  },
  {
    'question': "Which category is worst for Mac?",
    'answer1': "Photo/Video Editing",
    'answer2': "Maintenance",
    'answer3': "Design",
    'answer4': "Gaming",
    'correct_answer': 4,
  },
  {
    'question': "Who helped Steve Jobs introduce Macintosh?",
    'answer1': "Ronald Wayne",
    'answer2': "Steve Wozniak",
    'answer3': "Mike Markkula",
    'answer4': "John Sculley",
    'correct_answer': 2,
  },
  {
    'question': "One of the following is not Macintosh 128k specs",
    'answer1': "Photo/Video Editing",
    'answer2': "Maintenance",
    'answer3': "Design",
    'answer4': "Gaming",
    'correct_answer': 4,
  }
]

# - init -

root = Tk()

# - variables -

var = IntVar()

question = StringVar()
answer1 = StringVar()
answer2 = StringVar()
answer3 = StringVar()
answer4 = StringVar()

message = StringVar()

points = StringVar(value="Your score is: 0")

score = 0

# - create elements -

photo1 = PhotoImage(file="badge_1.gif")
photo2 = PhotoImage(file="badge_2.gif")

# show first image
badge = Label(root, image=photo1)
badge.pack()

badge.some_variable_1 = photo1 # solution for some problem with Garbage Collector (GC)
badge.some_variable_2 = photo2 # solution for some problem with Garbage Collector (GC)

# ---

points_label = Label(root, textvariable=points, relief=RAISED, width=30)
points_label.pack(fill='both')

question_label = Label(root, textvariable=question, relief=RAISED)
question_label.pack(fill='both')

# ---

choice1 = Radiobutton(root, textvariable=answer1, variable=var, value=1, command=sel)
choice1.pack(anchor='w')

choice2 = Radiobutton(root, textvariable=answer2, variable=var, value=2, command=sel)
choice2.pack(anchor='w')

choice3 = Radiobutton(root, textvariable=answer3, variable=var, value=3, command=sel)
choice3.pack(anchor='w')

choice4 = Radiobutton(root, textvariable=answer4, variable=var, value=4, command=sel)
choice4.pack(anchor='w')

# ---

message_label = Label(root, textvariable=message, relief=RAISED)
message_label.pack(fill='both')

# ---

btn_submit = Button(root, text="Submit", fg="red", command=submit_btn)
btn_submit.pack(fill='both')

btn_next = Button(root, text="Next", fg="green", command=next_btn)
btn_next.pack(fill='both')

btn_quit = Button(root, text="Quit", fg="blue", command=quit_btn)
btn_quit.pack(fill='both')

# - set question and answers -

# questions numbers in random order
questions_count = len(all_questions)
questions_order = list(range(questions_count))
random.shuffle(questions_order)
# set first question
current_question = 0
set_question(current_question)

# - start the engine -

root.mainloop()