OxypherText Python GUI

import tkinter as tk
from tkinter import ttk
import random
import string
import pyperclip


def caesar_cipher(text, shift):
    result = ''
    for char in text:
        if char.isalpha():
            start = ord('a') if char.islower() else ord('A')
            shifted_char = chr((ord(char) - start + shift) % 26 + start)
        elif char.isdigit():
            shifted_char = str((int(char) + shift) % 10)
        else:
            shifted_char = char
        result += shifted_char
    return result


def encrypt_text():
    try:
        text = input_text.get('1.0', tk.END).strip()
        shift = int(shift_entry.get())
        encrypted_text = caesar_cipher(text, shift)
        output_text.delete('1.0', tk.END)
        output_text.insert(tk.END, encrypted_text)
    except ValueError:
        output_text.delete('1.0', tk.END)
        output_text.insert(tk.END, "Invalid shift value. Please enter an integer.")


def decrypt_text():
    try:
        text = input_text.get('1.0', tk.END).strip()
        shift = int(shift_entry.get())
        decrypted_text = caesar_cipher(text, -shift)
        output_text.delete('1.0', tk.END)
        output_text.insert(tk.END, decrypted_text)
    except ValueError:
        output_text.delete('1.0', tk.END)
        output_text.insert(tk.END, "Invalid shift value. Please enter an integer.")


def copy_to_clipboard():
    text_to_copy = output_text.get('1.0', tk.END).strip()
    pyperclip.copy(text_to_copy)


def show_details():
    details_window = tk.Toplevel(root)
    details_window.title("Program Details")
    details_text = tk.Text(details_window, wrap=tk.WORD, height=15, width=60)
    details_text.pack(padx=10, pady=10)
    details_text.insert(tk.END, "OxypherText is a versatile text encryption/decryption tool using the Caesar cipher. It allows users to encrypt and decrypt text by shifting characters based on a user-defined key. \n\nKey Features:\n- Caesar Cipher Encryption/Decryption: Encrypts and decrypts text using the Caesar cipher, which shifts each character by a specified number of positions down the alphabet.\n- User-Friendly Interface: Simple and intuitive GUI for easy text input, shift value adjustment, and output display.\n- Real-Time Encryption/Decryption: Provides instant encryption and decryption feedback as the user interacts with the application.\n- Copy to Clipboard: Allows users to quickly copy the encrypted or decrypted text to the clipboard for easy sharing or storage.\n- Error Handling: Implements error handling to gracefully manage invalid input, such as non-integer shift values.\n\nThis program is designed for those who need a basic yet effective way to secure their text messages or data, especially in environments where complex encryption methods are not required.")
    details_text.config(state=tk.DISABLED) # Make it read-only



root = tk.Tk()
root.title("OxypherText")

mainframe = ttk.Frame(root, padding="12 12 12 12")
mainframe.grid(column=0, row=0, sticky=(tk.N, tk.W, tk.E, tk.S))
root.columnconfigure(0, weight=1)
root.rowconfigure(0, weight=1)

input_label = ttk.Label(mainframe, text="Enter Text:")
input_label.grid(column=1, row=1, sticky=tk.W)

input_text = tk.Text(mainframe, width=40, height=5)
input_text.grid(column=1, row=2, columnspan=2, sticky=(tk.W, tk.E))

shift_label = ttk.Label(mainframe, text="Shift Value:")
shift_label.grid(column=1, row=3, sticky=tk.W)

shift_entry = ttk.Entry(mainframe, width=10)
shift_entry.grid(column=2, row=3, sticky=(tk.W, tk.E))
shift_entry.insert(0, "3") # Default shift value

encrypt_button = ttk.Button(mainframe, text="Encrypt", command=encrypt_text)
encrypt_button.grid(column=1, row=4, sticky=tk.W)

decrypt_button = ttk.Button(mainframe, text="Decrypt", command=decrypt_text)
decrypt_button.grid(column=2, row=4, sticky=tk.E)

output_label = ttk.Label(mainframe, text="Result:")
output_label.grid(column=1, row=5, sticky=tk.W)

output_text = tk.Text(mainframe, width=40, height=5)
output_text.grid(column=1, row=6, columnspan=2, sticky=(tk.W, tk.E))

copy_button = ttk.Button(mainframe, text="Copy to Clipboard", command=copy_to_clipboard)
copy_button.grid(column=1, row=7, columnspan=2, sticky=tk.S)

# Details Button
details_button = ttk.Button(mainframe, text="Details", command=show_details)
details_button.grid(column=1, row=8, columnspan=2, sticky=tk.S)

for child in mainframe.winfo_children():
    child.grid_configure(padx=5, pady=5)

root.mainloop()