Notepad/notepad.py at main · ambilimurali/Notepad · GitHub

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import os
import tkinter as tk
from tkinter import messagebox, filedialog

class Notepad:
    def __init__(self, width=600, height=400):
        self.root = tk.Tk()
        self.root.title("Untitled - Notepad")
        self.root.geometry(f"{width}x{height}")
        self.filepath = None
        self.text_changed = False

        # Configure row and column so Text widget expands
        self.root.grid_rowconfigure(0, weight=1)
        self.root.grid_columnconfigure(0, weight=1)

        # Text Area with undo enabled
        self.text_area = tk.Text(self.root, undo=True, wrap='word')
        self.text_area.grid(sticky=tk.N + tk.E + tk.S + tk.W)

        # Scrollbar for Text Area
        self.scrollbar = tk.Scrollbar(self.text_area)
        self.scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self.text_area.config(yscrollcommand=self.scrollbar.set)
        self.scrollbar.config(command=self.text_area.yview)

        # Menu setup
        self.menu_bar = tk.Menu(self.root)
        self.root.config(menu=self.menu_bar)

        # File menu
        file_menu = tk.Menu(self.menu_bar, tearoff=0)
        file_menu.add_command(label="New", accelerator="Ctrl+N", command=self.new_file)
        file_menu.add_command(label="Open", accelerator="Ctrl+O", command=self.open_file)
        file_menu.add_command(label="Save", accelerator="Ctrl+S", command=self.save_file)
        file_menu.add_separator()
        file_menu.add_command(label="Exit", accelerator="Ctrl+Q", command=self.exit_app)
        self.menu_bar.add_cascade(label="File", menu=file_menu)

        # Edit menu
        edit_menu = tk.Menu(self.menu_bar, tearoff=0)
        edit_menu.add_command(label="Undo", accelerator="Ctrl+Z", command=self.text_area.edit_undo)
        edit_menu.add_command(label="Redo", accelerator="Ctrl+Y", command=self.text_area.edit_redo)
        edit_menu.add_separator()
        edit_menu.add_command(label="Cut", accelerator="Ctrl+X", command=lambda: self.text_area.event_generate("<<Cut>>"))
        edit_menu.add_command(label="Copy", accelerator="Ctrl+C", command=lambda: self.text_area.event_generate("<<Copy>>"))
        edit_menu.add_command(label="Paste", accelerator="Ctrl+V", command=lambda: self.text_area.event_generate("<<Paste>>"))
        self.menu_bar.add_cascade(label="Edit", menu=edit_menu)

        # Help menu
        help_menu = tk.Menu(self.menu_bar, tearoff=0)
        help_menu.add_command(label="About", command=self.show_about)
        self.menu_bar.add_cascade(label="Help", menu=help_menu)

        # Bind shortcuts
        self.root.bind("<Control-n>", lambda event: self.new_file())
        self.root.bind("<Control-o>", lambda event: self.open_file())
        self.root.bind("<Control-s>", lambda event: self.save_file())
        self.root.bind("<Control-q>", lambda event: self.exit_app())
        self.root.bind("<Control-z>", lambda event: self.text_area.edit_undo())
        self.root.bind("<Control-y>", lambda event: self.text_area.edit_redo())

        # Track changes
        self.text_area.bind("<<Modified>>", self.on_text_change)

    def on_text_change(self, event=None):
        self.text_changed = self.text_area.edit_modified()
        self.text_area.edit_modified(False)

    def new_file(self):
        if self.text_changed:
            if not self.ask_save_changes():
                return
        self.text_area.delete(1.0, tk.END)
        self.filepath = None
        self.root.title("Untitled - Notepad")
        self.text_changed = False

    def open_file(self):
        if self.text_changed:
            if not self.ask_save_changes():
                return
        file = filedialog.askopenfilename(defaultextension=".txt",
                                          filetypes=[("Text Documents", "*.txt"),
                                                     ("All Files", "*.*")])
        if file:
            self.filepath = file
            self.text_area.delete(1.0, tk.END)
            with open(file, "r") as f:
                self.text_area.insert(1.0, f.read())
            self.root.title(os.path.basename(file) + " - Notepad")
            self.text_changed = False

    def save_file(self):
        if not self.filepath:
            file = filedialog.asksaveasfilename(initialfile="Untitled.txt",
                                                defaultextension=".txt",
                                                filetypes=[("Text Documents", "*.txt"),
                                                           ("All Files", "*.*")])
            if not file:
                return
            self.filepath = file
        with open(self.filepath, "w") as f:
            f.write(self.text_area.get(1.0, tk.END))
        self.root.title(os.path.basename(self.filepath) + " - Notepad")
        self.text_changed = False

    def exit_app(self):
        if self.text_changed:
            if not self.ask_save_changes():
                return
        self.root.destroy()

    def ask_save_changes(self):
        answer = messagebox.askyesnocancel("Save Changes?", "You have unsaved changes. Save before continuing?")
        if answer:  # yes
            self.save_file()
            return True
        elif answer is False:  # no
            return True
        else:  # cancel
            return False

    def show_about(self):
        messagebox.showinfo("About Notepad", "Simple Notepad app\nDeveloped by You")

    def run(self):
        self.root.mainloop()

if __name__ == "__main__":
    notepad = Notepad()
    notepad.run()