TechNotes 4

import tkinter as tk
from tkinter import messagebox as mb
import os
_root = frame1

filepath0 = ''
def getnewpath():
    global filepath0
    global os
    filepath1 = 'T:/Storage/Documents/Untitled'
    rep = 0
    while True:
        if os.path.exists(filepath1 + str(rep) + '.txt'):
            rep += 1
        else:
            filepath0 = filepath1 + str(rep) + '.txt'
            break

getnewpath()

textarea = tk.Text(_root, font='consolas', bd=0)

menubar = tk.Frame(_root, bd=1, relief='solid', bg='white')

tascrollbar = tk.Scrollbar(textarea, cursor='arrow')

textarea.config(yscrollcommand=tascrollbar.set)
tascrollbar.config(command=textarea.yview)

def open_file(path):
    global textarea
    global filepath0
    filepath0 = path
    _file = open(path, 'r')
    try:
        _conts = _file.read()
        _file.close()
        textarea.delete(1.0, 'end')
        textarea.insert(1.0, _conts)
    except UnicodeDecodeError:
        textarea.delete(1.0, 'end')
        textarea.insert(1.0, 'Unable to open file\nFile is not in text format.')

def save_file():
    global filepath0
    global textarea
    try:
        sav = open(filepath0, 'w')
        sav.write(textarea.get(1.0, 'end')[:-1])
        sav.close()
    except PermissionError:
        global mb
        mb.showinfo("Permission Denied", "You do not seem to have permission to edit this file.")

def new_file():
    global getnewpath
    global textarea
    textarea.delete(1.0, 'end')
    getnewpath()

newfilebutton = tk.Button(menubar, bd=0, bg='white', activebackground='lightgray', text='New', command=new_file)
savefilebutton = tk.Button(menubar, bd=0, bg='white', activebackground='lightgray', text='Save', command=save_file)

menubar.pack(side='top', anchor='n', fill='x')
newfilebutton.pack(anchor='w', side='left')
savefilebutton.pack(anchor='w', side='left')
textarea.pack(expand=True, fill='both')
tascrollbar.pack(side='right', anchor='e', fill='y')