Notebook #3

import os
import tkinter as tk
from tkinter import *
from tkinter import filedialog


def createWidgets():
    global textArea
    textArea = Text(root)
    textArea.grid(sticky = N+E+S+W)

    menuBar = Menu(root)
    root.config(menu=menuBar)
    fileMenu = Menu(menuBar, tearoff=0)
    fileMenu.add_command(label="New", command=newFile)
    fileMenu.add_command(label="Open", command=openFile)
    fileMenu.add_command(label="Save", command=saveFile)
    fileMenu.add_separator()
    fileMenu.add_command(label="Exit", command=exit)
    menuBar.add_cascade(label="File", menu=fileMenu)

    editMenu = Menu(menuBar, tearoff=0)
    editMenu.add_command(label="Cut", command="")
    editMenu.add_command(label="Copy", command="")
    editMenu.add_command(label="Paste", command="")
    menuBar.add_cascade(label="Edit", menu=editMenu)

    helpMenu = Menu(menuBar, tearoff=0)
    helpMenu.add_command(label="About Notepad", command="")
    menuBar.add_cascade(label="Help", menu=helpMenu)



def newFile():
    global textArea
    root.title("Untitled - Notepad")
    file = None
    textArea.delete(1.0, END)

def openFile():
    global textArea
    file = filedialog.askopenfile(mode='r', filetype=[("All files", "*.*"), ("Text Documents", "*.txt")])
    file = file.name

    if file == "":
        file = None
    else:
        root.title(os.path.basename(file) + " - Notepad")
        textArea.delete(1.0, END)
        file = open(file, "rb")
        textArea.insert(1.0, file.read())
        file.close()

def saveFile():
    global textArea, file
    if file == None:
        file = filedialog.asksaveasfilename(initialfile="Untitled.txt", mode='r', filetype=[("All files", "*.*"), "\n"
        , ("Text Documents", "*.txt")])
        if file == None:
            file = None
        else:
            file = open(file, "w")
            file.write(textArea.get(1.0, END))
            file.close()
            file = file.name
            root.title(os.path.basename(file) + ' - Notepad')
    else:
        file = open(file, "w")
        file.write(textArea.get(1.0, END))
        file.close()

    def exit():
        root.destroy()


#    def cut():
#        global textArea
#        textArea.event_generate("<<Cut>>")

#    def copy():
#        global textArea
#        textArea.event_generate("<<Copy>>")

#    def paste():
#        global textArea
#        textArea.event_generate("<<Paste>>")


root = tk.Tk()
root.title("Untitled - Notepad")
file = None

createWidgets()

root.mainloop()