"Notepad" using Tkinter in Python GUI
BY TEJAS
Python is a very Important Language in today's computer world. Python use everywhere in OS, Hardware, Softwares, and also in Websites.
We know that by python we can create software. In this example, we are using "Tkinter" python library for creating Notepad. There are 13+ GUI libraries similar to Tkinter but we are using Tkinter because it is simple, easy and advance library.
For this example, we are using Python 3.8.1 stable version.
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It is fully working notepad means by this notepad we can create a new file, open file and all similar activities do the same as original Windows notepad.
This is a working video of Notepad created by us using Tkinter (GUI)
first, we have to install Tkinter by using the command pip install tkinter in the terminal. In new versions of python python, there is already installed a tkinter we do not have to install if it is already installed. just type the pip install tkinter command python automatically adjust this so don't worry about that just run the command in terminal.
This program is divided into 3 different parts
1. Importing Tkinter in program
2. Adding Menus in notepad program
3. Adding the functionality to notepad program.
below here is a Python code and output of Python program.
Extension of Python Program is .py
notepad.py :-
import tkinter
import os
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *
class Notepad:
__root = Tk()
# default window width and height
__thisWidth = 300
__thisHeight = 300
__thisTextArea = Text(__root)
__thisMenuBar = Menu(__root)
__thisFileMenu = Menu(__thisMenuBar, tearoff=0)
__thisEditMenu = Menu(__thisMenuBar, tearoff=0)
__thisHelpMenu = Menu(__thisMenuBar, tearoff=0)
# To add scrollbar
__thisScrollBar = Scrollbar(__thisTextArea)
__file = None
def __init__(self, **kwargs):
# Set icon
try:
self.__root.wm_iconbitmap("Notepad.ico")
except:
pass
# Set window size (the default is 300x300)
try:
self.__thisWidth = kwargs['width']
except KeyError:
pass
try:
self.__thisHeight = kwargs['height']
except KeyError:
pass
# Set the window text
self.__root.title("Untitled - Notepad")
# Center the window
screenWidth = self.__root.winfo_screenwidth()
screenHeight = self.__root.winfo_screenheight()
# For left-alling
left = (screenWidth / 2) - (self.__thisWidth / 2)
# For right-allign
top = (screenHeight / 2) - (self.__thisHeight / 2)
# For top and bottom
self.__root.geometry('%dx%d+%d+%d' % (self.__thisWidth,
self.__thisHeight,
left, top))
# To make the textarea auto resizable
self.__root.grid_rowconfigure(0, weight=1)
self.__root.grid_columnconfigure(0, weight=1)
# Add controls (widget)
self.__thisTextArea.grid(sticky=N + E + S + W)
# To open new file
self.__thisFileMenu.add_command(label="New",
command=self.__newFile)
# To open a already existing file
self.__thisFileMenu.add_command(label="Open",
command=self.__openFile)
# To save current file
self.__thisFileMenu.add_command(label="Save",
command=self.__saveFile)
# To create a line in the dialog
self.__thisFileMenu.add_separator()
self.__thisFileMenu.add_command(label="Exit",
command=self.__quitApplication)
self.__thisMenuBar.add_cascade(label="File",
menu=self.__thisFileMenu)
# To give a feature of cut
self.__thisEditMenu.add_command(label="Cut",
command=self.__cut)
# to give a feature of copy
self.__thisEditMenu.add_command(label="Copy",
command=self.__copy)
# To give a feature of paste
self.__thisEditMenu.add_command(label="Paste",
command=self.__paste)
# To give a feature of editing
self.__thisMenuBar.add_cascade(label="Edit",
menu=self.__thisEditMenu)
# To create a feature of description of the notepad
self.__thisHelpMenu.add_command(label="About Notepad",
command=self.__showAbout)
self.__thisMenuBar.add_cascade(label="Help",
menu=self.__thisHelpMenu)
self.__root.config(menu=self.__thisMenuBar)
self.__thisScrollBar.pack(side=RIGHT, fill=Y)
# Scrollbar will adjust automatically according to the content
self.__thisScrollBar.config(command=self.__thisTextArea.yview)
self.__thisTextArea.config(yscrollcommand=self.__thisScrollBar.set)
def __quitApplication(self):
self.__root.destroy()
# exit()
def __showAbout(self):
showinfo("Notepad", "Mrinal Verma")
def __openFile(self):
self.__file = askopenfilename(defaultextension=".txt",
filetypes=[("All Files", "*.*"),
("Text Documents", "*.txt")])
if self.__file == "":
# no file to open
self.__file = None
else:
# Try to open the file
# set the window title
self.__root.title(os.path.basename(self.__file) + " - Notepad")
self.__thisTextArea.delete(1.0, END)
file = open(self.__file, "r")
self.__thisTextArea.insert(1.0, file.read())
file.close()
def __newFile(self):
self.__root.title("Untitled - Notepad")
self.__file = None
self.__thisTextArea.delete(1.0, END)
def __saveFile(self):
if self.__file == None:
# Save as new file
self.__file = asksaveasfilename(initialfile='Untitled.txt',
defaultextension=".txt",
filetypes=[("All Files", "*.*"),
("Text Documents", "*.txt")])
if self.__file == "":
self.__file = None
else:
# Try to save the file
file = open(self.__file, "w")
file.write(self.__thisTextArea.get(1.0, END))
file.close()
# Change the window title
self.__root.title(os.path.basename(self.__file) + " - Notepad")
else:
file = open(self.__file, "w")
file.write(self.__thisTextArea.get(1.0, END))
file.close()
def __cut(self):
self.__thisTextArea.event_generate("<<Cut>>")
def __copy(self):
self.__thisTextArea.event_generate("<<Copy>>")
def __paste(self):
self.__thisTextArea.event_generate("<<Paste>>")
def run(self):
# Run main application
self.__root.mainloop()
# Run main application
notepad = Notepad(width=600, height=400)
notepad.run()
output :-
import tkinter
import os
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *
class Notepad:
__root = Tk()
# default window width and height
__thisWidth = 300
__thisHeight = 300
__thisTextArea = Text(__root)
__thisMenuBar = Menu(__root)
__thisFileMenu = Menu(__thisMenuBar, tearoff=0)
__thisEditMenu = Menu(__thisMenuBar, tearoff=0)
__thisHelpMenu = Menu(__thisMenuBar, tearoff=0)
# To add scrollbar
__thisScrollBar = Scrollbar(__thisTextArea)
__file = None
def __init__(self, **kwargs):
# Set icon
try:
self.__root.wm_iconbitmap("Notepad.ico")
except:
pass
# Set window size (the default is 300x300)
try:
self.__thisWidth = kwargs['width']
except KeyError:
pass
try:
self.__thisHeight = kwargs['height']
except KeyError:
pass
# Set the window text
self.__root.title("Untitled - Notepad")
# Center the window
screenWidth = self.__root.winfo_screenwidth()
screenHeight = self.__root.winfo_screenheight()
# For left-alling
left = (screenWidth / 2) - (self.__thisWidth / 2)
# For right-allign
top = (screenHeight / 2) - (self.__thisHeight / 2)
# For top and bottom
self.__root.geometry('%dx%d+%d+%d' % (self.__thisWidth,
self.__thisHeight,
left, top))
# To make the textarea auto resizable
self.__root.grid_rowconfigure(0, weight=1)
self.__root.grid_columnconfigure(0, weight=1)
# Add controls (widget)
self.__thisTextArea.grid(sticky=N + E + S + W)
# To open new file
self.__thisFileMenu.add_command(label="New",
command=self.__newFile)
# To open a already existing file
self.__thisFileMenu.add_command(label="Open",
command=self.__openFile)
# To save current file
self.__thisFileMenu.add_command(label="Save",
command=self.__saveFile)
# To create a line in the dialog
self.__thisFileMenu.add_separator()
self.__thisFileMenu.add_command(label="Exit",
command=self.__quitApplication)
self.__thisMenuBar.add_cascade(label="File",
menu=self.__thisFileMenu)
# To give a feature of cut
self.__thisEditMenu.add_command(label="Cut",
command=self.__cut)
# to give a feature of copy
self.__thisEditMenu.add_command(label="Copy",
command=self.__copy)
# To give a feature of paste
self.__thisEditMenu.add_command(label="Paste",
command=self.__paste)
# To give a feature of editing
self.__thisMenuBar.add_cascade(label="Edit",
menu=self.__thisEditMenu)
# To create a feature of description of the notepad
self.__thisHelpMenu.add_command(label="About Notepad",
command=self.__showAbout)
self.__thisMenuBar.add_cascade(label="Help",
menu=self.__thisHelpMenu)
self.__root.config(menu=self.__thisMenuBar)
self.__thisScrollBar.pack(side=RIGHT, fill=Y)
# Scrollbar will adjust automatically according to the content
self.__thisScrollBar.config(command=self.__thisTextArea.yview)
self.__thisTextArea.config(yscrollcommand=self.__thisScrollBar.set)
def __quitApplication(self):
self.__root.destroy()
# exit()
def __showAbout(self):
showinfo("Notepad", "Mrinal Verma")
def __openFile(self):
self.__file = askopenfilename(defaultextension=".txt",
filetypes=[("All Files", "*.*"),
("Text Documents", "*.txt")])
if self.__file == "":
# no file to open
self.__file = None
else:
# Try to open the file
# set the window title
self.__root.title(os.path.basename(self.__file) + " - Notepad")
self.__thisTextArea.delete(1.0, END)
file = open(self.__file, "r")
self.__thisTextArea.insert(1.0, file.read())
file.close()
def __newFile(self):
self.__root.title("Untitled - Notepad")
self.__file = None
self.__thisTextArea.delete(1.0, END)
def __saveFile(self):
if self.__file == None:
# Save as new file
self.__file = asksaveasfilename(initialfile='Untitled.txt',
defaultextension=".txt",
filetypes=[("All Files", "*.*"),
("Text Documents", "*.txt")])
if self.__file == "":
self.__file = None
else:
# Try to save the file
file = open(self.__file, "w")
file.write(self.__thisTextArea.get(1.0, END))
file.close()
# Change the window title
self.__root.title(os.path.basename(self.__file) + " - Notepad")
else:
file = open(self.__file, "w")
file.write(self.__thisTextArea.get(1.0, END))
file.close()
def __cut(self):
self.__thisTextArea.event_generate("<>")
def __copy(self):
self.__thisTextArea.event_generate("<>")
def __paste(self):
self.__thisTextArea.event_generate("<>")
def run(self):
# Run main application
self.__root.mainloop()
# Run main application
notepad = Notepad(width=600, height=400)
notepad.run()
output :-