How to Handle Window Close Events in Python Tkinter?

Handling Window Close Events in Python Tkinter

How do you manage the scenario where a user closes a window by clicking the designated 'X' button within a Tkinter program?

Answering the Query:

Tkinter introduces the concept of protocol handlers to manage the communication between an application and its corresponding window manager. The WM_DELETE_WINDOW protocol, frequently employed in this context, delineates the course of action when a user opts to close a window manually.

To establish a handler for the WM_DELETE_WINDOW protocol, utilize the protocol method. This protocol installation is applicable to Tk and Toplevel widgets.

Code Illustration:

<code class="python">import tkinter as tk
from tkinter import messagebox

root = tk.Tk()

def on_closing():
    user_choice = messagebox.askokcancel("Quit", "Do you want to quit?")
    if user_choice:
        root.destroy()

root.protocol("WM_DELETE_WINDOW", on_closing)
root.mainloop()</code>

In this example, the on_closing function prompts the user for confirmation before proceeding with window destruction.

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