main.py

#GUI Notepad

from tkinter import *
from tkinter.messagebox import showinfo
from tkinter.filedialog import askopenfilename, asksaveasfilename
import os

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

def openFile():
    global file

    file = askopenfilename(defaultextension = ".txt", filetypes=[("All files", "*.*"), ("Text Documents", "*.txt")])

    if file == "":
        file = None
    else:
        root.title(os.path.basename(file) + "- Notepad")
        TextArea.delete(1.0, END)

        f = open(file, "r")
        TextArea.insert(1.0,f.read())

        f.close()

def saveFile():
    global file
    if file == None:
        file = asksaveasfilename(initialfile = "Untitled.txt",defaultextension = ".txt", filetypes=[("All files", "*.*"), ("Text Documents", "*.txt")])

        if file == "":
            file = None

        else:
            #Save it as a New File
            f = open(file, "w")
            f.write(TextArea.get(1.0, END))
            f.close()

            root.title(os.path.basename(file) + " - Notepad")
    else:
        f = open(file, "w")
        f.write(TextArea.get(1.0, END))
        f.close()


def quitApp():
    root.destroy()

def cut():
    TextArea.event_generate(("<<Cut>>"))

def copy():
    TextArea.event_generate(("<<Copy>>"))

def paste():
    TextArea.event_generate(("<<Paste>>"))

def about():
    showinfo("About Notepad", "Notepad by farizma")


if __name__ == '__main__':

    # ---------------- Basic tkinter setup ----------------
    # Creating an instance of tkinter
    root = Tk()
    # Adding title
    root.title("Untitled - Notepad")
    # Setting icon
    root.iconbitmap("icon.ico")
    # Setting default size
    root.geometry("644x588")
    # Setting minimum size
    root.minsize(600, 500)



    # ---------------- Creating a Menu Bar ----------------
    MenuBar = Menu(root)
    root.config(menu = MenuBar)

    # File Menu
    FileMenu = Menu(MenuBar, tearoff = 0)
    # To open a New File
    FileMenu.add_command(label = "New", command = newFile)
    # To open already existing File
    FileMenu.add_command(label = "Open", command = openFile)
    # To save the current file
    FileMenu.add_command(label = "Save", command = saveFile)
    # To add a seperating line
    FileMenu.add_separator()
    # To quit the notepad
    FileMenu.add_command(label = "Exit", command = quitApp)

    MenuBar.add_cascade(label = "File", menu = FileMenu)


    # Edit Menu
    EditMenu = Menu(MenuBar, tearoff = 0)
    # To give a feature of Cut, Copy, Paste
    EditMenu.add_command(label = "Cut", command = cut)
    EditMenu.add_command(label = "Copy", command = copy)
    EditMenu.add_command(label = "Paste", command = paste)

    MenuBar.add_cascade(label = "Edit", menu = EditMenu)


    # Help Menu
    HelpMenu = Menu(MenuBar, tearoff = 0)
    HelpMenu.add_command(label = "About Notepad", command = about)

    MenuBar.add_cascade(label = "Help", menu = HelpMenu)



    # ---------------- Creating a Text Area ----------------
    # Text area for writing text
    TextArea = Text(root, font = "lucida 13")
    file = None
    TextArea.pack(expand = True, fill = BOTH)

    # Adding Scrollbar using rules from tkinter
    scroll = Scrollbar(TextArea)
    scroll.pack(side = RIGHT, fill = Y)
    scroll.config(command = TextArea.yview)
    TextArea.config(yscrollcommand = scroll.set)

    # ---------------- Creating a Bottom Status Bar ----------------
    # line_col = StringVar()
    # line_col.set("Ln 1, Col 1")

    statusbar = Frame(root, bd=1, relief=SUNKEN)
    statusbar.pack(side=BOTTOM, fill=X)

    Label(statusbar, text="UTF-8", width=20).pack(side=RIGHT)
    Label(statusbar, text="Windows(CRLF)", width=20).pack(side=RIGHT)
    # Label(statusbar, textvariable=line_col, width=20).pack(side=RIGHT)

    root.mainloop()