PysimpleGui: pre-select an Item in a Combobox on Keyboard input

I have a GUI with pysimplegui that uses a combobox.
There are alphabetically sorted strings in the list for the combobox.

The Combobox is readonly (to only input the strings available),
so the user gets the drop down list right away when clicking anywhere on the combobox element.

When the drop-down list is open, the user can highlight items by the "up" and "down" keys.
Also selection of the highlighted item by the enter key is possible.

It would increase the usability, if the highlight jumps to (or selects) the entry that starts with S when pushing the "s" key on the keyboard.

What I tried

• opening the window with return_keyboard_events=True but it would not change the behaviour.

• Fiddeling with the enable_per_char_events=True for the combo element just shows that this method is no longer available in version 4.60.4 (though it is still in the docs) and the code crashes.

Screenshot

> 4.61.0.85
>
> Combo Element - new parameter enable_per_char_events. When True will get an event when individual characters are entered.

Please upgrade your PySimpleGUI from Github.

Not all enhancements added into the PyPI version.
Download from GitHub

>There is code in the PySimpleGUI package that upgrades your previously pip installed package to the latest version checked into GitHub.
> You can use the commands psgmain to run the test harness or psgupgrade to invoke the GitHub upgrade code.

or, you can call sg.main(), like

d:\>python
Python 3.10.2 (tags/v3.10.2:a58ebcc, Jan 17 2022, 14:12:15) [MSC v.1929 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import PySimpleGUI as sg
>>> sg.main()

<br>

Following code demo another way by binding for it, but tkinter code required here.

import PySimpleGUI as sg

lst = sorted([
    'Global', 'USA', 'India', 'Brazil', 'Russian', 'France', 'UK', 'Italy',
    'Spain', 'Germany', 'Colombia', 'Argentina', 'Mexico', 'Turkey', 'Poland',
    'Iran', 'Ukraine', 'South Africa', 'Peru', 'Netherlands'])
width = max(map(len, lst)) + 2

font = ("Courier New", 16)
sg.theme("DarkBlue3")
sg.set_options(font=font)

layout = [[sg.Combo(lst, size=(width, 5), key='COMBO'), sg.Button('Exit')]]
window = sg.Window("COMBO", layout, finalize=True)
combo = window['COMBO']
combo.bind('<Key>', ' Key')
combo.bind('<Enter>', ' Enter')
user_event = False

while True:
    event, values = window.read()
    if event in (sg.WINDOW_CLOSED, 'Exit'):
        break
    elif event == 'COMBO Enter':
        combo.Widget.select_range(0, 'end')
    elif event == 'COMBO Key':
        entry = values['COMBO'].lower()
        if user_event:
            user_event = False
        else:
            if entry:
                index = None
                for i, item in enumerate(lst):
                    if item.lower().startswith(entry):
                        index = i
                        break
                if index is not None:
                    user_event = True
                    combo.Widget.set(lst[index])
                    combo.Widget.event_generate('<Key-Down>')
                    combo.Widget.current(index)

    print(event, values)

window.close()