Create a Text Editor in Python | Creating a text-editor in Python using tkinter
Create a Text Editor in Python
In this tutorial, we will learn how to create a text editor like notepad in Python.
Text editor is a very useful and important tool for any programmer. It is helpful in development of software in any languages. We are already familiar with text editors like Notepad, VS Code, Sublime text etc. all these are very helpful and usable.
So in this tutorial, we will be learning how to create a simple text editor using Python Programming Language. In this, we will be using the Tkinter library and two additional modules supported by Tkinter, ‘MessageBox’ and ‘FileDialog’ for providing some additional functionality to our editor.
So lets get familiar with these modules:
- Tkinter – This is one of the most Powerful, Widely Used and Platform Independent library available in Python for creating seamless and nice-looking GUI applications, it is very easy to use and understand different widgets provided by Tkinter. We are using this library for creating the gui look for our editor.
- Message Box– This module provides the template classes and a variety of inbuilt functions for alerting the user, these message boxes can be an info message, an error message or ask yes/no message.
- FileDialog – This module provides the classes and inbuilt functions for creating file or directory selection windows. This is used when we want to save or open any created file using tkinter.
Creating Text Editor Using Python
Installing the Libraries:
Well in Windows when we install Python then this tkinter library comes inbuilt and thus we dont have to install it. But still if you dont have this library installed then type the following command in the terminal.
All the other modules 'File Dialog' & 'Message Box' come hand-in-hand with the tkinter module.
CODE
# Importing Required libraries & Modules
from tkinter import *
from tkinter import messagebox
from tkinter import filedialog
# Defining TextEditor Class
class TextEditor:
# Defining Constructor
def __init__(self,root):
# Assigning root
self.root = root
# Title of the window
self.root.title("TEXT EDITOR")
# Window Geometry
self.root.geometry("1200x700+200+150")
# Initializing filename
self.filename = None
# Declaring Title variable
self.title = StringVar()
# Declaring Status variable
self.status = StringVar()
# Creating Titlebar
self.titlebar = Label(self.root,textvariable=self.title,font=("times new roman",15,"bold"),bd=2,relief=GROOVE)
# Packing Titlebar to root window
self.titlebar.pack(side=TOP,fill=BOTH)
# Calling Settitle Function
self.settitle()
# Creating Statusbar
self.statusbar = Label(self.root,textvariable=self.status,font=("times new roman",15,"bold"),bd=2,relief=GROOVE)
# Packing status bar to root window
self.statusbar.pack(side=BOTTOM,fill=BOTH)
# Initializing Status
self.status.set("Welcome To Text Editor")
# Creating Menubar
self.menubar = Menu(self.root,font=("times new roman",15,"bold"),activebackground="skyblue")
# Configuring menubar on root window
self.root.config(menu=self.menubar)
# Creating File Menu
self.filemenu = Menu(self.menubar,font=("times new roman",12,"bold"),activebackground="skyblue",tearoff=0)
# Adding New file Command
self.filemenu.add_command(label="New",accelerator="Ctrl+N",command=self.newfile)
# Adding Open file Command
self.filemenu.add_command(label="Open",accelerator="Ctrl+O",command=self.openfile)
# Adding Save File Command
self.filemenu.add_command(label="Save",accelerator="Ctrl+S",command=self.savefile)
# Adding Save As file Command
self.filemenu.add_command(label="Save As",accelerator="Ctrl+A",command=self.saveasfile)
# Adding Seprator
self.filemenu.add_separator()
# Adding Exit window Command
self.filemenu.add_command(label="Exit",accelerator="Ctrl+E",command=self.exit)
# Cascading filemenu to menubar
self.menubar.add_cascade(label="File", menu=self.filemenu)
# Creating Edit Menu
self.editmenu = Menu(self.menubar,font=("times new roman",12,"bold"),activebackground="skyblue",tearoff=0)
# Adding Cut text Command
self.editmenu.add_command(label="Cut",accelerator="Ctrl+X",command=self.cut)
# Adding Copy text Command
self.editmenu.add_command(label="Copy",accelerator="Ctrl+C",command=self.copy)
# Adding Paste text command
self.editmenu.add_command(label="Paste",accelerator="Ctrl+V",command=self.paste)
# Adding Seprator
self.editmenu.add_separator()
# Adding Undo text Command
self.editmenu.add_command(label="Undo",accelerator="Ctrl+U",command=self.undo)
# Cascading editmenu to menubar
self.menubar.add_cascade(label="Edit", menu=self.editmenu)
# Creating Help Menu
self.helpmenu = Menu(self.menubar,font=("times new roman",12,"bold"),activebackground="skyblue",tearoff=0)
# Adding About Command
self.helpmenu.add_command(label="About",command=self.infoabout)
# Cascading helpmenu to menubar
self.menubar.add_cascade(label="Help", menu=self.helpmenu)
# Creating Scrollbar
scrol_y = Scrollbar(self.root,orient=VERTICAL)
# Creating Text Area
self.txtarea = Text(self.root,yscrollcommand=scrol_y.set,font=("times new roman",15,"bold"),state="normal",relief=GROOVE)
# Packing scrollbar to root window
scrol_y.pack(side=RIGHT,fill=Y)
# Adding Scrollbar to text area
scrol_y.config(command=self.txtarea.yview)
# Packing Text Area to root window
self.txtarea.pack(fill=BOTH,expand=1)
# Calling shortcuts funtion
self.shortcuts()
# Defining settitle function
def settitle(self):
# Checking if Filename is not None
if self.filename:
# Updating Title as filename
self.title.set(self.filename)
else:
# Updating Title as Untitled
self.title.set("Untitled")
# Defining New file Function
def newfile(self,*args):
# Clearing the Text Area
self.txtarea.delete("1.0",END)
# Updating filename as None
self.filename = None
# Calling settitle funtion
self.settitle()
# updating status
self.status.set("New File Created")
# Defining Open File Funtion
def openfile(self,*args):
# Exception handling
try:
# Asking for file to open
self.filename = filedialog.askopenfilename(title = "Select file",filetypes = (("All Files","*.*"),("Text Files","*.txt"),("Python Files","*.py")))
# checking if filename not none
if self.filename:
# opening file in readmode
infile = open(self.filename,"r")
# Clearing text area
self.txtarea.delete("1.0",END)
# Inserting data Line by line into text area
for line in infile:
self.txtarea.insert(END,line)
# Closing the file
infile.close()
# Calling Set title
self.settitle()
# Updating Status
self.status.set("Opened Successfully")
except Exception as e:
messagebox.showerror("Exception",e)
# Defining Save File Funtion
def savefile(self,*args):
# Exception handling
try:
# checking if filename not none
if self.filename:
# Reading the data from text area
data = self.txtarea.get("1.0",END)
# opening File in write mode
outfile = open(self.filename,"w")
# Writing Data into file
outfile.write(data)
# Closing File
outfile.close()
# Calling Set title
self.settitle()
# Updating Status
self.status.set("Saved Successfully")
else:
self.saveasfile()
except Exception as e:
messagebox.showerror("Exception",e)
# Defining Save As File Funtion
def saveasfile(self,*args):
# Exception handling
try:
# Asking for file name and type to save
untitledfile = filedialog.asksaveasfilename(title = "Save file As",defaultextension=".txt",initialfile = "Untitled.txt",filetypes = (("All Files","*.*"),("Text Files","*.txt"),("Python Files","*.py")))
# Reading the data from text area
data = self.txtarea.get("1.0",END)
# opening File in write mode
outfile = open(untitledfile,"w")
# Writing Data into file
outfile.write(data)
# Closing File
outfile.close()
# Updating filename as Untitled
self.filename = untitledfile
# Calling Set title
self.settitle()
# Updating Status
self.status.set("Saved Successfully")
except Exception as e:
messagebox.showerror("Exception",e)
# Defining Exit Funtion
def exit(self,*args):
op = messagebox.askyesno("WARNING","Your Unsaved Data May be Lost!!")
if op>0:
self.root.destroy()
else:
return
# Defining Cut Funtion
def cut(self,*args):
self.txtarea.event_generate("<<Cut>>")
# Defining Copy Funtion
def copy(self,*args):
self.txtarea.event_generate("<<Copy>>")
# Defining Paste Funtion
def paste(self,*args):
self.txtarea.event_generate("<<Paste>>")
# Defining Undo Funtion
def undo(self,*args):
# Exception handling
try:
# checking if filename not none
if self.filename:
# Clearing Text Area
self.txtarea.delete("1.0",END)
# opening File in read mode
infile = open(self.filename,"r")
# Inserting data Line by line into text area
for line in infile:
self.txtarea.insert(END,line)
# Closing File
infile.close()
# Calling Set title
self.settitle()
# Updating Status
self.status.set("Undone Successfully")
else:
# Clearing Text Area
self.txtarea.delete("1.0",END)
# Updating filename as None
self.filename = None
# Calling Set title
self.settitle()
# Updating Status
self.status.set("Undone Successfully")
except Exception as e:
messagebox.showerror("Exception",e)
# Defining About Funtion
def infoabout(self):
messagebox.showinfo("About Text Editor","A Simple Text Editor\nCreated using Python.")
# Defining shortcuts Funtion
def shortcuts(self):
# Binding Ctrl+n to newfile funtion
self.txtarea.bind("<Control-n>",self.newfile)
# Binding Ctrl+o to openfile funtion
self.txtarea.bind("<Control-o>",self.openfile)
# Binding Ctrl+s to savefile funtion
self.txtarea.bind("<Control-s>",self.savefile)
# Binding Ctrl+a to saveasfile funtion
self.txtarea.bind("<Control-a>",self.saveasfile)
# Binding Ctrl+e to exit funtion
self.txtarea.bind("<Control-e>",self.exit)
# Binding Ctrl+x to cut funtion
self.txtarea.bind("<Control-x>",self.cut)
# Binding Ctrl+c to copy funtion
self.txtarea.bind("<Control-c>",self.copy)
# Binding Ctrl+v to paste funtion
self.txtarea.bind("<Control-v>",self.paste)
# Binding Ctrl+u to undo funtion
self.txtarea.bind("<Control-u>",self.undo)
# Creating TK Container
root = Tk()
# Passing Root to TextEditor Class
TextEditor(root)
# Root Window Looping
root.mainloop()
RESULTS
DEDED
aA
No comments: