File Loader/Slip with gui

import os
from tkinter import *
from tkinter.scrolledtext import ScrolledText
from tkinter import messagebox

current_file = "test.txt"
files = [f for f in os.listdir() if f.endswith(".txt")]  # Only show .txt files

# Function to handle selection from the file list
def on_select(event):
    selected_index = files_list.curselection()  # Get index of the selected item
    if selected_index:
        selected_item = files_list.get(selected_index)
        file_entry.delete(0, END)
        file_entry.insert(0, selected_item[:-4])  # Set file name without extension

# Function to save content to the current file
def save_file():
    try:
        with open(current_file, "w+", encoding="utf-8") as f:
            f.write(text_field.get(1.0, END).strip())  # Remove trailing newlines/extra spaces
        messagebox.showinfo("Success", f"File '{current_file}' saved successfully!")
    except Exception as e:
        messagebox.showerror("Error", f"Failed to save file: {e}")

# Function to reset text field
def reset_file():
    text_field.delete(1.0, END)

# Function to load content from the current file
def get_file():
    try:
        with open(current_file, "r+", encoding="utf-8") as f:
            text_field.insert(1.0, f.read())
    except FileNotFoundError:
        messagebox.showerror("Error", f"File '{current_file}' not found!")

# Function to open a new file
def open_file():
    global current_file
    new_file = file_entry.get().strip()

    if not new_file:  # Ensure file name is not empty
        messagebox.showwarning("Input Error", "Please provide a valid file name.")
        return

    # Add .txt extension and check if file exists
    current_file = new_file + ".txt"
    if current_file not in files:
        messagebox.showerror("File Not Found", f"The file '{current_file}' does not exist.")
        return

    try:
        with open(current_file, "r+", encoding="utf-8") as f:
            reset_file()
            text_field.insert(1.0, f.read())
        messagebox.showinfo("Success", f"Opened file: {current_file}")
    except Exception as e:
        messagebox.showerror("Error", f"Failed to open file: {e}")

# Main application window
root = Tk()

# Configure the root window
root['bg'] = "#fff9ed"
root.geometry('800x600')
root.title("Text File Editor")

# Text field for editing
text_field = ScrolledText(root, wrap=WORD, width=80, height=20)
text_field.place(relx=0.5, rely=0.33, anchor=CENTER)

# Listbox for file selection
files_list = Listbox(root)
for file in files:
    files_list.insert(END, file)
files_list.bind('<<ListboxSelect>>', on_select)

# Buttons for actions
save_button = Button(root, text="Save", command=save_file)
reset_button = Button(root, text="Reset", command=reset_file)
open_button = Button(root, text="Open", command=open_file)

# File entry to show the selected file name
file_entry = Entry(root)

# Place the widgets in the window
save_button.place(relx=0.15, rely=0.7)
reset_button.place(relx=0.25, rely=0.7)
open_button.place(relx=0.45, rely=0.7)
file_entry.place(relx=0.60, rely=0.7)
files_list.place(relx=0.60, rely=0.75)

# Load the current file if it exists
get_file()

root.mainloop()