From 30a142743bd3e72e121f5f6ea064de9c28a2aba7 Mon Sep 17 00:00:00 2001
From: David Rotermund <54365609+davrot@users.noreply.github.com>
Date: Wed, 17 Jan 2024 17:37:11 +0100
Subject: [PATCH] Update README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
---
 tk/overview/README.md | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/tk/overview/README.md b/tk/overview/README.md
index 60119b6..f490dd7 100644
--- a/tk/overview/README.md
+++ b/tk/overview/README.md
@@ -75,6 +75,37 @@ del root
 
 ## [ttk.Checkbutton](https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/ttk-Checkbutton.html)
 
+![image_checkbutton.png](image_checkbutton.png)
+
+```python
+import tkinter as tk
+from tkinter import ttk
+
+
+def changed() -> None:
+    global variable
+    print(f"Changed: Now it is set to {variable.get()}")
+
+
+root = tk.Tk()
+
+width_element: int = 10
+InitialValue: bool = True
+
+variable = tk.BooleanVar()
+variable.set(InitialValue)
+
+a_button = ttk.Checkbutton(
+    root, text="Don't press", width=width_element, command=changed, variable=variable
+)
+a_button.grid(row=0, column=0, sticky="w")
+
+
+root.mainloop()
+
+del root
+```
+
 ## [ttk.Combobox](https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/ttk-Combobox.html)
 
 ## [ttk.Entry](https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/ttk-Entry.html)