tkinter_mini_project.py

import tkinter as tk
from tkinter import messagebox

class MyGUI():

    def __init__(self):

        self.root = tk.Tk()
        
        self.menu_bar = tk.Menu(self.root)

        self.file_menu = tk.Menu(self.menu_bar, tearoff=0)
        self.file_menu.add_command(label='Close', command=self.on_closing)
        self.file_menu.add_separator()
        self.file_menu.add_command(label='Close Without Question', command=self.on_closing)

        self.action_menu =tk.Menu(self.menu_bar, tearoff=0)
        self.action_menu.add_command(label="Show Message", command=self.show_message)

        self.menu_bar.add_cascade(menu=self.file_menu, label='File')
        self.menu_bar.add_cascade(menu=self.action_menu, label='Action')

        self.root.config(menu=self.menu_bar)

        self.label = tk.Label(self.root, text="Your Message", font=('Arial', 18))
        self.label.pack(padx=10, pady=10)

        self.textbox = tk.Text(self.root, height=5, font=('Arial', 16))
        self.textbox.bind('<KeyPress>', self.shortcut)
        self.textbox.pack(padx=10, pady=10)

        self.check_state  = tk.IntVar()

        self.check = tk.Checkbutton(self.root, text='Show Message box', font=('Arial', 16), variable=self.check_state)
        self.check.pack(padx=10, pady=10)

        self.button = tk.Button(self.root, text='Show Message', font=('Arial', 18), command=self.show_message)
        self.button.pack()

        self.clearbtn = tk.Button(self.root, text='Clear', font=("Arial", 18), command=self.clear)
        self.clearbtn.pack(padx=10, pady=10)
        

        self.root.protocol("WM_DELETE_WINDOW", self.on_closing) # To do a particular task when you want to close the GUI
        self.root.mainloop()

    
    def show_message(self):
        if self.check_state.get() == 0:
            print(self.textbox.get('1.0', tk.END)) # .get('1.0', tk.END) is used to get the entire content in the textbox.
        else:
            messagebox.showinfo(title='Message', message=self.textbox.get('1.0', tk.END))# This is to  show the content of the textbox in a message box.

    def shortcut(self, event):
        if event.state == 12 and event.keysym == 'Return':
            self.show_message()


    def on_closing(self):
        if messagebox.askyesno(title='Quit?', message='Do you really want to quit?'): # askyesno() function is for prompting the user whether to close the GUI or not.
            self.root.destroy() # This is to close the GUI after the message has been shown.

    def clear(self):
        self.textbox.delete('1.0', tk.END) # This is for clearing all the content of the textbox.


             



MyGUI()