Set the titlebar icon of any tkinter/toplevel window

Setting the title bar icon in a Tkinter window (whether it's the main window or any top-level window) is a common practice to brand your application or to provide a visual indication of the application's purpose.

Here's a step-by-step tutorial on how to set the titlebar icon of any Tkinter or Toplevel window:

1. Prerequisites:

You'll need an icon file. The preferred format for icons in Tkinter is .ico for Windows. On Linux, you can use .png or .gif.

2. Setting Icon for Main Window:

Step 1: Import Tkinter

import tkinter as tk

Step 2: Create Main Application Window

root = tk.Tk()
root.title("Icon Example")

Step 3: Set the Icon

root.iconbitmap('path_to_icon.ico')  # Replace 'path_to_icon.ico' with your icon file's path.

3. Setting Icon for Toplevel Window:

If you're creating additional windows using the Toplevel widget, you can set their icons in a similar manner:

top = tk.Toplevel(root)
top.title("Toplevel Icon Example")
top.iconbitmap('path_to_icon.ico')

4. Complete Example:

Combining everything, here's a simple example:

import tkinter as tk

root = tk.Tk()
root.title("Main Window")
root.geometry("300x200")
root.iconbitmap('path_to_icon.ico')

def open_toplevel():
    top = tk.Toplevel(root)
    top.title("Toplevel Window")
    top.geometry("300x200")
    top.iconbitmap('path_to_icon.ico')

tk.Button(root, text="Open Toplevel", command=open_toplevel).pack(pady=20)

root.mainloop()

When you run this code, you'll have a main window with a button. Clicking the button will open a top-level window. Both windows will have the same icon set in their title bars.

Notes:

Make sure that the icon file (path_to_icon.ico in the example) is in the correct path or provide the full path to the file.
On Linux, if you encounter an issue with .ico files, try using a .png or .gif format icon and see if that resolves the problem.

Python Tkinter set window icon example:

Description: Illustrate how to set the window icon in a Tkinter application.

Code Example:

import tkinter as tk
from tkinter import PhotoImage

root = tk.Tk()
root.title("Tkinter Window Icon Example")

# Replace 'path/to/icon.png' with the path to your icon image file
icon_path = 'path/to/icon.png'
icon_image = PhotoImage(file=icon_path)
root.iconphoto(True, icon_image)

root.mainloop()

Set icon for Tkinter Toplevel window:

Description: Extend the previous example to set the icon for a Toplevel window in Tkinter.

Code Example:

import tkinter as tk
from tkinter import PhotoImage

def open_toplevel_window():
    toplevel = tk.Toplevel(root)
    toplevel.title("Toplevel Window")
    
    # Replace 'path/to/icon.png' with the path to your icon image file
    icon_path = 'path/to/icon.png'
    icon_image = PhotoImage(file=icon_path)
    toplevel.iconphoto(True, icon_image)

root = tk.Tk()
root.title("Set Icon for Toplevel Window Example")

open_button = tk.Button(root, text="Open Toplevel Window", command=open_toplevel_window)
open_button.pack(pady=20)

# Replace 'path/to/icon.png' with the path to your icon image file
icon_path = 'path/to/icon.png'
icon_image = PhotoImage(file=icon_path)
root.iconphoto(True, icon_image)

root.mainloop()

Set favicon for Tkinter window:

Description: Demonstrate setting a favicon for a Tkinter window, similar to a web browser.

Code Example:

import tkinter as tk
from tkinter import PhotoImage

root = tk.Tk()
root.title("Set Favicon for Tkinter Window Example")

# Replace 'path/to/favicon.ico' with the path to your favicon file
favicon_path = 'path/to/favicon.ico'
favicon_image = PhotoImage(file=favicon_path)
root.tk.call('wm', 'iconphoto', root._w, favicon_image)

root.mainloop()