pomodoro timer in python

pomodoro.py

import winsound
import tkinter as tk
from PIL import Image, ImageDraw, ImageTk

class PomodoroClock:
    def __init__(self, master):
        self.master = master
        self.total_time_in_seconds = 0
        self.elapsed_time_in_seconds = 0
        self.timer_running = False
        self.timer_id = None

        self.canvas = tk.Canvas()

        self.time_string = tk.StringVar()
        self.time_string.trace_add(["write"], self.update_initial_time)

        self.time_entry = tk.Entry(master, textvariable=self.time_string)
        self.time_entry.pack()
        self.time_entry.insert(0, str(self.format_time(self.total_time_in_seconds)))

        self.canvas = tk.Canvas(master, width=200, height=200)
        self.canvas.pack()

        self.start_button = tk.Button(master, text="Start", command=self.start_timer)
        self.start_button.pack()

        self.stop_button = tk.Button(master, text="Stop", command=self.stop_timer)
        self.stop_button.pack()

        self.draw_progress_bar(0)

    def update_initial_time(self, *args):
        try:
            self.elapsed_time_in_seconds = 0
            self.total_time_in_seconds = self.convert_time_to_seconds(
                self.time_string.get()
            )
            self.stop_timer()
            self.draw_progress_bar(0)
        except ValueError:
            pass

    def start_timer(self):
        if not self.timer_running:
            self.total_time_in_seconds = self.convert_time_to_seconds(
                self.time_string.get()
            )
            self.timer_running = True
            self.timer_id = self.master.after(1000, self.update_timer)

    def stop_timer(self):
        if self.timer_running:
            self.master.after_cancel(self.timer_id)
            self.timer_running = False

    def update_timer(self):
        if (
            self.timer_running
            and self.elapsed_time_in_seconds < self.total_time_in_seconds
        ):
            self.elapsed_time_in_seconds += 1
            self.draw_progress_bar(
                self.elapsed_time_in_seconds / self.total_time_in_seconds
            )
            self.timer_id = self.master.after(1000, self.update_timer)
        elif self.elapsed_time_in_seconds >= self.total_time_in_seconds:
            winsound.Beep(1000, 1000)
            self.elapsed_time_in_seconds = 0
            self.timer_running = False

    def draw_progress_bar(self, progress):
        self.canvas.delete("all")
        image = Image.new("RGB", (200, 200), "white")
        draw = ImageDraw.Draw(image)
        draw.arc((10, 10, 190, 190), 0, 360, fill="grey", width=10)
        start_angle = -90
        end_angle = start_angle + 360 * progress
        draw.arc((10, 10, 190, 190), start_angle, end_angle, fill="blue", width=10)
        draw.text(
            (90, 90),
            self.format_time(self.total_time_in_seconds - self.elapsed_time_in_seconds),
            fill="black",
        )
        self.photo_image = ImageTk.PhotoImage(image)
        self.canvas.create_image(0, 0, image=self.photo_image, anchor="nw")

    def convert_time_to_seconds(self, time_string):
        minutes, seconds = map(int, time_string.split(":"))
        return minutes * 60 + seconds

    def format_time(self, seconds):
        minutes = seconds // 60
        remaining_seconds = seconds % 60
        return f"{minutes:02}:{remaining_seconds:02}"

root = tk.Tk()
clock = PomodoroClock(root)
root.mainloop()