todo.py

'''ToDo List GUI'''
import tkinter
from tkinter import END, ANCHOR
count = 0


'''Defining root window'''
root = tkinter.Tk()
root.title('ToDo-GUI')
root.iconbitmap('todo.ico')
root.geometry('400x400')
root.resizable(0, 0)


'''Define fonts and colors'''
my_font = ('Times New Roman', 12)
root_color = 'green'
button_color = '#e2cff4'
root.config(bg=root_color)


'''Define functions'''


def add_item():
    global count
    count = count+1
    my_listbox.insert(END, str(count) + ") " + list_entry.get())
    list_entry.delete(0, END)


def remove_item():
    my_listbox.delete(ANCHOR)


def clear_list():
    global count
    my_listbox.delete(0, END)
    count = 0


def save_list():
    with open('checklist.txt', 'w') as f:
        list_tuple = my_listbox.get(0, END)
        for item in list_tuple:
            if item.endswith('\n'):
                f.write(item)
            else:
                f.write(item+"\n")


def open_list():
    try:
        with open('checklist.txt', 'r') as f:
            for line in f:
                my_listbox.insert(END, line)
    except:
        return


'''Defining frames'''
input_frame = tkinter.Frame(root, bg=root_color)
output_frame = tkinter.Frame(root, bg=root_color)
button_frame = tkinter.Frame(root, bg=root_color)
input_frame.pack()
output_frame.pack()
button_frame.pack()


'''Input frame layout'''
list_entry = tkinter.Entry(input_frame, width=35, borderwidth=3, font=my_font)
list_add_button = tkinter.Button(
    input_frame, text="Add", borderwidth=2, font=my_font, bg=button_color, command=add_item)
list_entry.grid(row=0, column=0, padx=5, pady=5)
list_add_button.grid(row=0, column=1, padx=5, pady=5, ipadx=5)


'''Output frame layout'''
my_scrollbar = tkinter.Scrollbar(output_frame)
my_listbox = tkinter.Listbox(output_frame, height=15, width=45,
                             borderwidth=3, font=my_font, yscrollcommand=my_scrollbar.set)


'''Link scrollbar to listbox'''
my_scrollbar.config(command=my_listbox.yview)
my_listbox.grid(row=0, column=0)
my_scrollbar.grid(row=0, column=1, sticky="NS")


'''Button Frame layout'''
list_remove_button = tkinter.Button(
    button_frame, text="Remove Item", borderwidth=2, font=my_font, bg=button_color, command=remove_item)
list_clear_button = tkinter.Button(
    button_frame, text='Clear All', borderwidth=2, font=my_font, bg=button_color, command=clear_list)
save_button = tkinter.Button(button_frame, text='Save List',
                             borderwidth=2, font=my_font, bg=button_color, command=save_list)
quit_button = tkinter.Button(button_frame, text='Quit', borderwidth=2,
                             font=my_font, bg=button_color, command=root.destroy)
list_remove_button.grid(row=0, column=0, padx=2, pady=10)
list_clear_button.grid(row=0, column=1, padx=2, pady=10, ipadx=10)
save_button.grid(row=0, column=2, padx=2, pady=10, ipadx=10)
quit_button.grid(row=0, column=3, padx=2, pady=10, ipadx=25)


'''Open the previous list if available'''
open_list()


'''Run the root window's main loop'''
root.mainloop()\