How to stop copy, paste, and backspace in text widget in tkinter?

The Text widget in tkinter accepts multiline user input and supports various operations like copying, pasting, and deleting text. Sometimes you may need to disable these shortcuts for security or user interface reasons.

To disable copy, paste, and backspace operations in a Text widget, you need to bind specific key events to event handlers that return 'break'. This prevents the default behavior from executing.

Syntax

text_widget.bind('<key_event>', lambda event: 'break')

Example

Here's how to disable copy (Ctrl+C), paste (Ctrl+V), and backspace operations ?

# Import the required library
from tkinter import *

# Create an instance of tkinter frame or widget
win = Tk()
win.geometry("700x350")
win.title("Disabled Copy, Paste, Backspace")

# Create a text widget
text = Text(win, font=("Calibri", 14))
text.pack(fill=BOTH, expand=True)

# Insert some sample text
text.insert("1.0", "Try to copy, paste, or use backspace on this text!")

# Bind the keys with the event handler to disable them
text.bind('<Control-v>', lambda event: 'break')  # Disable paste
text.bind('<Control-c>', lambda event: 'break')  # Disable copy
text.bind('<BackSpace>', lambda event: 'break')  # Disable backspace

win.mainloop()

Additional Key Events to Disable

You can also disable other common editing operations ?

from tkinter import *

win = Tk()
win.geometry("700x350")
win.title("Multiple Disabled Operations")

text = Text(win, font=("Calibri", 14))
text.pack(fill=BOTH, expand=True)

text.insert("1.0", "This text widget has multiple operations disabled!")

# Disable multiple operations
text.bind('<Control-v>', lambda event: 'break')    # Paste
text.bind('<Control-c>', lambda event: 'break')    # Copy
text.bind('<Control-x>', lambda event: 'break')    # Cut
text.bind('<Control-a>', lambda event: 'break')    # Select All
text.bind('<BackSpace>', lambda event: 'break')   # Backspace
text.bind('<Delete>', lambda event: 'break')      # Delete key

win.mainloop()

How It Works

The bind() method connects keyboard events to handler functions. When you return 'break' from an event handler, tkinter stops processing that event, effectively disabling the default action.

• <Control-v> − Ctrl+V paste operation
• <Control-c> − Ctrl+C copy operation
• <BackSpace> − Backspace key
• lambda event: 'break' − Anonymous function that returns 'break'

Key Events Reference

Conclusion

Use event binding with lambda event: 'break' to disable specific keyboard operations in tkinter Text widgets. This technique is useful for creating restricted input fields or preventing accidental data loss.