PySimpleGUI/DemoPrograms/Demo_Desktop_Widget_Days_Counter.py

import PySimpleGUI as sg
import sys
import datetime

"""
    Another simple Desktop Widget using PySimpleGUI
    The "Days Since _______" Widget
    
    This widget counts the number of days since some date of your choosing.  
    Maybe you want to track the number of days since the start of the year.
    Or perhaps when you got married.... or divorced.... or stopped some activity
    Or started some activity.... you get the idea.  It tracks a time delta in days  

    Copyright 2021 PySimpleGUI
"""

ALPHA = 0.9                 # Initial alpha until user changes
THEME = 'Dark green 3'      # Initial theme until user changes
refresh_font = sg.user_settings_get_entry('-refresh font-', 'Courier 8')
title_font = sg.user_settings_get_entry('-title font-', 'Courier 8')
main_number_font = sg.user_settings_get_entry('-main number font-', 'Courier 70')
main_info_size = (3,1)

# May add ability to change theme from the user interface.  For now forcing to constant

GSIZE = (160, 160)
UPDATE_FREQUENCY_MILLISECONDS = 1000*60*60      # update every hour

def choose_theme(location):
    layout = [[sg.Text(f'Current theme {sg.theme()}')],
              [sg.Listbox(values=sg.theme_list(), size=(20, 20), key='-LIST-', enable_events=True)],
              [sg.OK(), sg.Cancel()]]

    window = sg.Window('Look and Feel Browser', layout, location=location, keep_on_top=True)
    old_theme = sg.theme()
    while True:  # Event Loop
        event, values = window.read()
        if event in (sg.WIN_CLOSED, 'Exit', 'OK', 'Cancel'):
            break
        sg.theme(values['-LIST-'][0])
        test_window=make_window(location=(location[0]-200, location[1]), test_window=True)
        test_window.read(close=True)
    window.close()

    if event == 'OK' and values['-LIST-']:
        sg.theme(values['-LIST-'][0])
        sg.user_settings_set_entry('-theme-', values['-LIST-'][0])
        return values['-LIST-'][0]
    else:
        sg.theme(old_theme)
    return  None

def make_window(location, test_window=False):
    title_font = sg.user_settings_get_entry('-title font-', 'Courier 8')
    title = sg.user_settings_get_entry('-title-', '')
    main_number_font = sg.user_settings_get_entry('-main number font-', 'Courier 70')

    if not test_window:
        theme = sg.user_settings_get_entry('-theme-', THEME)
        sg.theme(theme)

    alpha = sg.user_settings_get_entry('-alpha-', ALPHA)

    # ------------------- Window Layout -------------------
    # If this is a test window (for choosing theme), then uses some extra Text Elements to display theme info
    # and also enables events for the elements to make the window easy to close
    if test_window:
        top_elements = [[sg.Text(title, size=(20, 1), font=title_font, justification='c', k='-TITLE-', enable_events=True)],
                        [sg.Text('Click to close', font=title_font, enable_events=True)],
                        [sg.Text('This is theme', font=title_font, enable_events=True)],
                        [sg.Text(sg.theme(), font=title_font, enable_events=True)]]
        right_click_menu = [[''], ['Exit',]]
    else:
        top_elements = [[sg.Text(title, size=(20, 1), font=title_font, justification='c', k='-TITLE-')]]
        right_click_menu = [[''], ['Choose Date','Choose Title', 'Edit Me', 'Change Theme', 'Save Location', 'Refresh', 'Show Refresh Info', 'Hide Refresh Info', 'Set Title Font', 'Set Main Font','Alpha', [str(x) for x in range(1, 11)], 'Exit', ]]


    layout = top_elements + \
              [[sg.Text('0', size=main_info_size, font=main_number_font, k='-MAIN INFO-', justification='c', enable_events=test_window)],
              [sg.pin(sg.Text(size=(15, 2), font=refresh_font, k='-REFRESHED-', justification='c', visible=sg.user_settings_get_entry('-show refresh-', True)))]]

    try:
        window = sg.Window('Day Number', layout, location=location, no_titlebar=True, grab_anywhere=True, margins=(0, 0), element_justification='c', element_padding=(0, 0), alpha_channel=alpha, finalize=True, right_click_menu=right_click_menu, right_click_menu_tearoff=False, keep_on_top=True)
    except Exception as e:
        if sg.popup_yes_no('Error creating your window', e, 'These are your current settings:', sg.user_settings(), 'Do you want to delete your settings file?') == 'Yes':
            sg.user_settings_delete_filename()
            sg.popup('Settings deleted.','Please restart your program')
            exit()
        window = None

    return window

def main(location):
    loc =  sg.user_settings_get_entry('-location-', location)
    window = make_window(loc)

    saved_date = sg.user_settings_get_entry('-start date-', (1,1,2021))
    start_date = datetime.datetime(saved_date[2], saved_date[0], saved_date[1])

    while True:             # Event Loop
        # First update the status information
        delta = datetime.datetime.now() - start_date
        window['-MAIN INFO-'].update(f'{delta.days}')

        # for debugging show the last update date time
        window['-REFRESHED-'].update(datetime.datetime.now().strftime("%m/%d/%Y\n%I:%M:%S %p"))

        # -------------- Start of normal event loop --------------
        event, values = window.read(timeout=UPDATE_FREQUENCY_MILLISECONDS)
        print(event, values)
        if event == sg.WIN_CLOSED or event == 'Exit':
            break
        if event == 'Edit Me':
            sg.execute_editor(__file__)
        elif event == 'Choose Date':
            new_start = sg.popup_get_date(location=window.current_location(), keep_on_top=True)
            if new_start is not None:
                start_date = datetime.datetime(new_start[2], new_start[0], new_start[1])
                sg.user_settings_set_entry('-start date-', new_start)
        elif event == 'Choose Title':
            new_title = sg.popup_get_text('Choose a title for your date', location=window.current_location(), keep_on_top=True)
            if new_title is not None:
                window['-TITLE-'].update(new_title)
                sg.user_settings_set_entry('-title-', new_title)
        elif event == 'Show Refresh Info':
            window['-REFRESHED-'].update(visible=True)
            sg.user_settings_set_entry('-show refresh-', True)
        elif event == 'Save Location':
            sg.user_settings_set_entry('-location-', window.current_location())
        elif event == 'Hide Refresh Info':
            window['-REFRESHED-'].update(visible=False)
            sg.user_settings_set_entry('-show refresh-', False)
        elif event in [str(x) for x in range(1,11)]:
            window.set_alpha(int(event)/10)
            sg.user_settings_set_entry('-alpha-', int(event)/10)
        elif event == 'Change Theme':
            loc = window.current_location()
            if choose_theme(loc) is not None:
                # this is result of hacking code down to 99 lines in total. Not tried it before. Interesting test.
                _, window = window.close(), make_window(loc)
        elif event == 'Set Main Font':
            font = sg.popup_get_text('Main Information Font and Size (e.g. courier 70)', default_text=sg.user_settings_get_entry('-main number font-'), keep_on_top=True)
            if font:
                sg.user_settings_set_entry('-main number font-', font)
                _, window = window.close(), make_window(loc)
        elif event == 'Set Title Font':
            font = sg.popup_get_text('Title Font and Size (e.g. courier 8)', default_text=sg.user_settings_get_entry('-title font-'), keep_on_top=True)
            if font:
                sg.user_settings_set_entry('-title font-', font)
                _, window = window.close(), make_window(loc)



    window.close()


if __name__ == '__main__':
    # To start the window at a specific location, get this location on the command line
    # The location should be in form x,y with no spaces
    if len(sys.argv) > 1:
        location = sys.argv[1].split(',')
        location = (int(location[0]), int(location[1]))
    else:
        location = (None, None)
    main(location)