from tkinter import *
from tkinter import filedialog
from tkinter.filedialog import asksaveasfile
from tkinter.filedialog import askopenfile
from tkinter.messagebox import showerror

filename = None


def newFile():
    global filename
    filename = "Untitled"
    text.delete(0.0, END)


def saveFile():
    global filename
    t = text.get(0.0, END)
    f = open(filename, 'w')
    f.write(t)
    f.close()


def saveAs():
    f = asksaveasfile(defaultextension='.txt')
    t = text.get(0.0, END)
    try:
        f.write(t.rstrip())
    except:
        showerror(title="Nej!", message="Det gick inte att spara filen.")


root = Tk()


def openFile():
    global filename
    file = askopenfile(parent=root, title='Select a File')
    filename = file.name
    t = file.read()
    text.delete(0.0, END)
    text.insert(0.0, t)
    file.close()