# -*- coding: utf-8 -*-
import tkinter as tk
import tkinter.ttk as ttk
from tkinter import font
from tkinter import filedialog
root = tk.Tk()
root.title("tk34.py")
#####################################
def insert(event):
    #text.config(state = tk.NORMAL)
    text.insert(tk.END, entry.get()+"\n")
    entry.delete(0, tk.END)
    #text.config(state = tk.DISABLED)

def bold(event):
    text.tag_add('b1', tk.SEL_FIRST, tk.SEL_LAST)
    newfont = font.Font(weight = 'bold', slant = 'italic')
    text.tag_config('b1', font = newfont)

def italic(event):
    text.tag_add('i1', tk.SEL_FIRST, tk.SEL_LAST)
    newfont = font.Font(slant = 'italic')
    text.tag_config('i1', font = newfont)

def underline(event):
    text.tag_add('u1', tk.SEL_FIRST, tk.SEL_LAST)
    newfont = font.Font(underline = 1)
    text.tag_config('u1', font = newfont)

def overstrike(event):
    text.tag_add('o1', tk.SEL_FIRST, tk.SEL_LAST)
    newfont = font.Font(overstrike = 1)
    text.tag_config('o1', font = newfont)

def size(event, s):
    fs = [10,12,14,16,20,24,36]
    for i in fs:
        if i==s:
            text.tag_add('s'+str(i), tk.SEL_FIRST, tk.SEL_LAST)
            newfont = font.Font(size = s)
            text.tag_config('s'+str(i), font = newfont)
            break

def newfile():
    text.delete(0.0, tk.END)

def savefile():
    filename = filedialog.asksaveasfilename(title = "Save")
    try:
        file = open(filename, 'w', encoding = "utf-8")
        file.write(text.get(0.0, tk.END))
    except:
        pass
    finally:
        file.close()

def openfile():
    filename = filedialog.askopenfilename(title = 'Open')
    try:
        with open(filename, 'r', encoding = "utf-8") as file:
            content = file.read()
            text.delete(0.0, tk.END)
            text.insert(0.0, content)
    except:
        pass
   
def exitprogram():
    root.destroy()
# -------------------------------------------------------

bFrame = ttk.Frame(root)
bFrame.pack(side = tk.TOP)
# --------- about tag --------- #

ttk.Style().configure('a.TButton', width = 3)
bBold = ttk.Button(bFrame, text = "B", style = 'a.TButton')
bBold.grid(row = 0, column = 0)

bItalic = ttk.Button(bFrame, text = 'I', style = 'a.TButton')
bItalic.grid(row = 0, column = 1)

bUnderline = ttk.Button(bFrame, text = 'U', style = 'a.TButton')
bUnderline.grid(row = 0, column = 2)

bOverstrike = ttk.Button(bFrame, text = 'O', style = 'a.TButton')
bOverstrike.grid(row = 0, column = 3)

# Button for chinging size
bSize = ttk.Menubutton(bFrame, text = 'S', style = 'a.TButton')
bSize.menu = tk.Menu(bSize, tearoff = 0)
bSize['menu'] = bSize.menu
bSize.menu.add_command(label = '10', command = lambda: size("<1>",10))
bSize.menu.add_command(label = '12', command = lambda: size("<1>",12))
bSize.menu.add_command(label = '14', command = lambda: size("<1>",14))
bSize.menu.add_command(label = '16', command = lambda: size("<1>",16))
bSize.menu.add_command(label = '20', command = lambda: size("<1>",20))
bSize.menu.add_command(label = '24', command = lambda: size("<1>",24))
bSize.menu.add_command(label = '36', command = lambda: size("<1>",36))
bSize.grid(row = 0, column = 4)

bBold.bind("<1>", bold)
bItalic.bind("<1>", italic)
bUnderline.bind("<1>", underline)
bOverstrike.bind("<1>", overstrike)

## north Frame --------------------
north = ttk.Frame(root)
north.pack(side = tk.TOP, fill = tk.BOTH, expand = True)
text = tk.Text(north, width = 50, height = 20)
text.pack(side = tk.LEFT, fill = tk.BOTH, expand = True)
# Scrollbar
sc = ttk.Scrollbar(north)
sc.pack(side = tk.LEFT, fill = tk.BOTH)
sc.config(command = text.yview)
text.config(yscrollcommand = sc.set)

## south Frame
south = ttk.Frame(root)
south.pack(fill = tk.BOTH, expand = True)
entry = ttk.Entry(south)
btn = ttk.Button(south, text = 'Submit')
entry.pack(side = tk.LEFT, fill = tk.X, expand = True)
btn.pack(side = tk.LEFT, fill=tk.X)

btn.bind("<1>", insert)
entry.bind("<Return>", insert)

"""
text.insert(tk.END, "Hi, there.......\n")
text.insert(tk.END, "See ya...")
text.tag_add('t1', '1.1', '1.10')
text.tag_config('t1', background = 'lightgreen', 
                font = 'Harriton 14 bold italic')
"""
menubar = tk.Menu(root)
menu_file = tk.Menu(menubar, tearoff = 0)
menu_file.add_command(label = 'New', command = newfile)
menu_file.add_command(label = 'Open', command = openfile)
menu_file.add_command(label = 'Save', command = savefile)
menu_file.add_command(label = 'Exit', command = exitprogram)
menubar.add_cascade(label = 'File', menu = menu_file)
root.config(menu = menubar)
#####################################
root.mainloop()